Skip to main content

Home/ Open Intelligence / Energy/ Group items tagged emergence

Rss Feed Group items tagged

D'coda Dcoda

Easier Information Exchange Strengthens Emergency Response [21Sep11] - 0 views

  • A nuclear or radiological emergency presents complex public health, environmental and engineering challenges. A constant flow of detailed, reliable information is indispensable to be able to marshal and coordinate the needed response which includes the prompt mobilisation and dispatch of specialised human and equipment resources, as requested. The global focal point for such coordination and information exchange is the IAEA's Incident and Emergency Centre, or IEC. It is the IEC's task to inform many different official designated actors around the world as quickly as possible whenever a nuclear or radiological emergency occurs. A sustained and reliable information flow is one of the most important resources in effective incident and emergency response. New Platform
  • One of the IEC's tasks is to develop and improve the communication and coordination systems that deliver authenticated and verified information to the emergency responders who need it. During the emergency response to the Fukushima Daiichi Nuclear Power Plant accident, the IEC launched a new, secure web-based communications platform, the Unified System for Information Exchange on Incidents and Emergencies, or USIE. The new system, which had been in development since 2009, replaces two existing communication systems, thus simplifying the emergency information exchange. "The new USIE system delivers a solution the emergency response community needed and requested from the IAEA," said Denis Flory, IAEA Deputy Director General for Nuclear Safety and Security. "When the IAEA's Member States respond to a nuclear incident or emergency, they need a single, secure, straight-forward system that easily adapts to their needs. That is exactly what USIE does."
  • Alert System Like its predecessor systems, USIE is a secure website to which registered users have access. Instead of monitoring two separate systems that previously reported on different types of incidents, users now receive alerts from the new USIE system when new information is issued about any type of incident, ranging from a lost radioactive source to a full-scale nuclear emergency. The platform delivers alerts, based upon the user's preferences, via text messages delivered to a mobile device, or via email, or via fax. The system tracks multiple events, issuing information that has been authenticated by the country reporting an accident or incident. The platform meets demanding security standards thus offering its users the assurance that the information received is reliable.
  • ...4 more annotations...
  • Readiness Preparedness is an essential prerequisite for effective nuclear emergency management. International exercises are held systematically to determine whether the national systems in place are prepared and can respond swiftly and effectively. The USIE system is designed to support such exercises. "For the first time, this simple-to-use and effective system streamlines mechanisms for reporting and sharing information about incidents and emergencies in a secure information exchange channel," said Elena Buglova, the Head of the IAEA's Incident and Emergency Centre. This innovation strengthens international coordination, she noted, "which will improve the speed and effectiveness of the global response to nuclear and radiological emergencies of all types."
  • Background
  • Until the Chernobyl nuclear accident in 1986, there was no information exchange system. Immediately following that accident, the IAEA's Member States negotiated the so-called Emergency Conventions to ensure that in the event of a nuclear accident, the country that suffers an accident would issue timely, authenticated information, while the Member States that could field technical support, would do so in a coordinated fashion, if such support is requested by the State concerned. When concerns regarding the malicious use of nuclear or radioactive materials grew, the IAEA established the IEC in 2005 to serve as a global focal point for emergency preparedness and response to nuclear and radiological incidents and emergencies. The IEC develops standards, guidelines and tools like USIE. The IEC staff provide support, training, global event reporting, information exchange and around-the-clock assistance to Member States dealing with nuclear and radiological events. Fundamentally, the IEC is a global coordinator for international expertise from the IAEA, as well as from other international organizations, such as the FAO, WHO, or WMO.
  • Before USIE's launch in June 2011, two secure websites were operated to provide emergency and support information: The Emergency Notification and Assistance Convention Website, or ENAC, was set up to exchange information on nuclear accidents or radiological emergencies. The Nuclear Event Web-based System, or NEWS, is a joint project of the IAEA, OECD/NEA and World Association of Nuclear Operators that provides authoritative information on nuclear and radiological events, using the International Nuclear and Radiological Event Scale, or INES. See Story Resources for more information.
D'coda Dcoda

Rising water, falling journalism | Bulletin of the Atomic Scientists [17Jun11] - 0 views

  • at the Fort Calhoun Nuclear Power Station near Blair, Nebraska, the river is already lapping at the Aqua Dams -- giant plastic tubes filled with water -- that form a stockade around the plant's buildings. The plant has become an island.
  • The Nuclear Regulatory Commission (NRC) issued a "yellow finding PDF" (indicating a safety significance somewhere between moderate and high) for the plant last October, after determining that the Omaha Public Power District (OPPD) "did not adequately prescribe steps to mitigate external flood conditions in the auxiliary building and intake structure" in the event of a worst-case Missouri River flood. The auxiliary building -- which surrounds the reactor building like a horseshoe flung around a stake -- is where the plant's spent-fuel pool and emergency generators are located.
  • OPPD has since taken corrective measures, including sealing potential floodwater-penetration points, installing emergency flood panels, and revising sandbagging procedures. It's extremely unlikely that this year's flood, no matter how historic, will turn into a worst-case scenario: That would happen only if an upstream dam were to instantaneously disintegrate. Nevertheless, in March of this year the NRC identified Fort Calhoun as one of three nuclear plants requiring the agency's highest level of oversight. In the meantime, the water continues to rise
  • ...4 more annotations...
  • On June 7, there was a fire -- apparently unrelated to the flooding -- in an electrical switchgear room at Fort Calhoun. For about 90 minutes, the pool where spent fuel is stored had no power for cooling. OPPD reported that "offsite power remained available, as well as the emergency diesel generators if needed." But the incident was yet another reminder of the plant's potential vulnerability
  • And so, Fort Calhoun remains on emergency alert because of the flood -- which is expected to worsen by early next week. On June 9, the Army Corps of Engineers announced PDF that the Missouri River would crest at least two feet higher in Blair than previously anticipated
  • The Fort Calhoun plant has never experienced a flood like this before
  • this spring, heavy rains and high snowpack levels in Montana, northern Wyoming, and the western Dakotas have filled reservoirs to capacity, and unprecedented releases from the dams are now reaching Omaha and other cities in the Missouri River valley. Floodgates that haven't been opened in 50 years are spilling 150,000 cubic feet per second -- enough water to fill more than a hundred Olympic-size swimming pools in one minute. And Fort Calhoun isn't the only power plant affected by flooding on the Missouri: The much larger Cooper Nuclear Station in Brownville, Nebraska, sits below the Missouri's confluence with the Platte River -- which is also flooding. Workers at Cooper have constructed barriers and stockpiled fuel for the plant's three diesel generators while, like their colleagues at Fort Calhoun, they wait for the inevitable.
  •  
    about the risk to the Ft. Calhoun Nuclear Plant due to Missouri River flooding and other nuclear facilities in the area
D'coda Dcoda

Japanese Nuclear Emergency Director says local residents have no right to avoid radiati... - 0 views

  • Japanese Nuclear Emergency Director: You Have No Right To A Radiation-Free Life, Gizmodo by Andrew Tarantola, July 26, 2011:
  • This footage, from a recent meeting of indignant Japanese citizens and feckless Japanese government types should be a little shocking. Sadly, it’s just more of the same – ineptitude and inaction. By denying the right to avoiding radiation? OK, shocking. [...] One Fukushima resident asks, “As other people do, people in Fukushima have the right to avoid the radiation exposure and live a healthy life, too. Don’t you think so?” A Nuclear Safety Commission Of Japan rep, when pushed to go beyond his canned non-answer, deadpans “I don’t know if they have that right.” The crowd reacts as you would expect when told they nuclear-threatened welfare isn’t a concern. [...]
D'coda Dcoda

2 nuclear reactors taken offline after Va. quake [23Aug11] - 0 views

  • Federal officials say two nuclear reactors at the North Anna Power Station in Louisa County, Va., were automatically taken off line by safety systems around the time of the earthquake. The Dominion-operated power plant is being run off three emergency diesel generators, which are supplying power for critical safety equipment. The NRC and Dominion are sending people to inspect the plan
  • A fourth diesel generator failed, but it wasn't considered an emergency because the other generators are working, according to the Nuclear Regulatory Commission. Dominion said it declared an alert at the North Anna facility and the reactors have been shut down safely and no major damage has been reported.
  • The earthquake was felt at the company's other Virginia nuclear power station, Surry Power Station in southeast Virginia, but not as strongly there. Both units at that power station continue to operate safely, Dominion said. The quake also caused Dominion's newest non-nuclear power station, Bear Garden in Buckingham County, to shut down automatically.
  • ...1 more annotation...
  • NRC spokesman Roger Hannah says the agency was not immediately aware of any damage at nuclear power plants in the southeast. Hannah said he knew of no other shut reactor but that unusual events were reported at a dozen other plant sites. Louisa County is about 40 miles northwest of Richmond.
  •  
    an emergency generator also failed
D'coda Dcoda

AFP: India better prepared for nuclear crisis: watchdog [29Sep11] - 0 views

  • India has improved procedures to deal with a nuclear emergency in the wake of the Fukushima crisis in Japan, the country's atomic energy watchdog said Thursday, after criticism of its preparedness."After Fukushima, we have drawn lessons on all aspects of reactor safety and one positive development is the integrated disaster management plan," the Atomic Energy Regulatory Board chairman S.S. Bajaj said.
  • Earlier this year, Bajaj's predecessor at the AERB, A. Gopalkrishnan, criticised India's readiness to deal with emergencies of any kind and said that plans to tackle major nuclear incidents were largely a paper exercise.Drills were infrequent "half-hearted efforts which amount more to a sham", he said after an massive earthquake and tsunami struck the Japanese Fukushima plant in March, forcing a re-think on nuclear power around the world.A survey of nearly 10,000 Indians at the time also suggested that 77 percent of people had concerns about atomic safety while 69 percent believed the authorities could not handle a nuclear disaster on the scale of that in Japan.
  • Bajaj told AFP on the sidelines of a nuclear energy summit in the financial hub Mumbai that India's nuclear emergency plan "was not that positive" in the past but added: "These weaknesses have been plugged."M.C. Abani, a nuclear specialist at the National Disaster Management Authority, said that six emergency exercises had been conducted at Indian nuclear power plants since March and procedures strengthened."NDMA has raised 10 battalions of National Disaster Response Force. Each battalion has 1,150 soldiers and officers. They are trained in handling nuclear, chemical, biological and radiological incidents," he said.
  • ...2 more annotations...
  • Medical professionals working in and around existing and proposed nuclear power plants were also being trained in how to deal with the aftermath of a nuclear incident, he added.India is increasingly looking to nuclear power to meet the demands of its fast-growing economy and burgeoning population as well as to provide energy security.The South Asian country currently has 20 nuclear power plants, generating some 4,780 megawatts of power. Seven other reactors with a capacity of 5,300 megawatts are under construction.
  • The government aims to increase nuclear output to 63,000 MW by 2032.
D'coda Dcoda

Pennsylvania nuclear plants prepare for possible flooding [09Sep11] - 3 views

  • Nuclear power plants in Pennsylvania are preparing to cope with flooding, but none has declared a state of emergency, US Nuclear Regulatory Commission spokesman Neil Sheehan said Thursday. All the Pennsylvania nuclear plants that could potentially be affected by flooding are in close communication with NRC, and with state and local officials, and the agency has resident inspectors at each plant who are monitoring the situation, Sheehan said. The plants were all operating at full power early Thursday, according to NRC data, except for Exelon Nuclear's Peach Bottom-3, which was at 88% power and has been gradually reducing its output for several days ahead of refueling outage.
  • Emergency diesel generators and their fuel tanks at those plants are "located at a higher elevation, in buildings designed to keep them dry," Sheehan said. Exelon Nuclear's Three Mile Island-1, located along the Susquehanna River, 10 miles southeast of Harrisburg, began its abnormal operating procedure for river flooding early Wednesday, Sheehan said. The river peaked at 291 feet above sea level Wednesday and was at 288 feet above sea level early Thursday. It is expected to crest Thursday at about 297 feet above sea level, he said.
  • If the river reaches 300 feet above sea level, then the plant would have to declare an unusual event, the least significant of NRC's four emergency levels, Sheehan said. If the river reaches 302 feet above sea level, the plant would need to shut and an alert, the next highest level of emergency, would need to be declared. "Important equipment" at Three Mile Island-1 is protected against flooding up to about 315 feet above sea level, Sheehan said.
  • ...3 more annotations...
  • At Exelon Nuclear's Peach Bottom-2 and -3 reactors, about 18 miles south of Lancaster, Pennsylvania, the Conowingo Pond is expected to crest at 109 feet above sea level, Sheehan said.
  • Plant procedures require the reactors to be shut down if the pond reaches 111 feet above sea level. Exelon is working to control pond levels by using the spillways at the Conowingo Dam, he said. Exelon Nuclear does not anticipate it will need to shut down Three Mile Island-1 due to flooding, company spokeswoman April Schilpp said Thursday. "We have several feet of margin before any action would be required," Schilpp said. She declined to disclose at what point the plant would be required to shut down, but said it is a function of the rate of river flow and river level.
  • At PPL's Susquehanna-1 and -2 units in Salem Township, about 70 miles northeast of Harrisburg, the Susquehanna River is cresting at 39 feet above river level, Sheehan said. The plant entered its abnormal operating procedure for flooding earlier Thursday. "Major safety-related structures and components" of the plants are located about 75 feet above river level, he said. "The biggest impact on the plant" might be on its water intakes, which are being closely monitored, he said. There might be problems getting plant personnel to and from the site, so some staff might remain at the plant overnight, he said
D'coda Dcoda

Spent Fuel Pools in Japan Survived Disaster, Industry Notes [28Jul11] - 0 views

  • The staff of the Nuclear Regulatory Commission recently produced a list of safety improvements that might be undertaken at American nuclear plants in light of the Fukushima disaster in Japan. On Tuesday, the nuclear industry focused on two elements that were conspicuous by their absence.
  • In a presentation to Wall Street analysts, Marvin Fertel, the president and chief executive of the Nuclear Energy Institute, emphasized that spent fuel pools at the Fukushima Daiichi plant had “survived the accident quite well.”Early in the crisis, which began with an earthquake and tsunami on March 11, American regulators feared that water in one of the pools had almost completely boiled off, and the American Embassy in Tokyo advised Americans to stay 50 miles away. But “the pools may turn out to be a much better story at Fukushima than people envisioned,’’ Mr. Fertel said.
  • Noting that fuel pools at American reactors have far more radioactive material in them than the ones at Fukushima, the accident focused new attention on the idea of moving spent fuel out of the pools and into dry casks, Something already done at most American reactors when they run out of space.That idea first came to prominence after the terrorist attacks of Sept. 11, 2001.
  • ...7 more annotations...
  • But the Nuclear Regulatory Commission staff’s report does not call for moving more of the fuel.When the commission received an oral report from a six-member “task force” it appointed to study the safety implications of Fukushima, one commissioner, William C. Ostendorff, said he had received letters from members of Congress asking for wider use of the casks, however.But Charles L. Miller, who led the task force, replied that removing the fuel would not do much to reduce the basic problem, which is that fuel rods remain in the pool, and if cooling is knocked out, the water that provides protection against melting and the release of radioactive materials will boil away.
  • “Before you can take it out of the pool, it has to be at least five years old, and by that time, we call it, for lack of a better word, cold fuel,’’ Mr. Miller said.At the briefing on Tuesday, Mr. Fertel mentioned other recommendations from the task force, including better instruments for altering operators to how much water is in the pools and new ways of adding water in an emergency. Pulling more fuel out, he said, would provide certain advantages but is also certain to expose workers to radiation in the course of the transfer.
  • Fukushima used dry casks as well, and those appear to have survived without damage, Mr. Fertel said, although they have not been thoroughly inspected. “They’re fine, but so are the pools,’’ he said.
  • They were not unscathed, however; debris flew into the pools after the buildings surrounding them blew up in hydrogen explosions.
  • The task force also refrained from recommending changes in emergency planning zones, despite the embassy’s recommendation during the crisis for Americans to stay 50 miles away from Fukushima. In the United States, emergency evacuation planning is required within 10 miles of any reactor.
  • Mr. Fertel said the recommendation to evacuate to 50 miles “was based not on information, but on the lack thereof.’’
  • Opponents of nuclear power have argued that the commission should cease all extensions of reactors’ operating licenses until it has digested the lessons of the accident in Japan. But Mr. Fertel noted that since March 11, the commission has issued 20-year license extensions for the Vermont Yankee, Palo Verde, Prairie Island, Salem and Hope Creek reactors, and allowed higher power outputs for Limerick and Point Beach.
D'coda Dcoda

(Part 3) Professor Tatsuhiko Kodama of Tokyo University Tells the Politicians: "What Ar... - 0 views

  • Testimony by Professor Tatsuhiko Kodama of Tokyo University continues. He goes back to Minami Soma City where his Radioisotope Center has been helping to decontaminate.We at the Radioisotope Center of Tokyo University have been helping to decontaminate Minami-Soma City, sending about 4 people at a time and doing decontamination work for the length of 700km per week.Again, what's happening to Minami-Soma clearly shows that 20 or 30 kilometer radius [from the nuke plant] doesn't make any sense at all. You have to measure in more detail like measuring each nursery school.
  • Right now, from the 20 to 30 kilometer radius area, 1,700 school children are put on the buses to go to school. Actually in Minami-Soma, the center of the city is located near the ocean, and 70% of the schools have relatively low level of radiation. Yet, children are forced to get on the school buses to go all the way to schools near Iitate-mura [where radiation is higher], spending 1 million yen everyday for the busing.
  • I strongly demand that this situation be terminated as soon as possible.What's most problematic is the government's policy that they will compensate the residents for the moving cost only if their areas are designated as official evacuation zones. In a recent committee held at the House of Councilors [Upper House], President Shimizu of TEPCO and Mr. Kaieda, Minister of Economy, Trade and Industry answered that way. I ask you to separate the two immediately - compensation criteria issue and children's safety issue.
  • ...8 more annotations...
  • I strongly ask you to do whatever you can to protect the children.Another thing is, what I strongly feel when I'm doing the decontamination work in Fukushima is that emergency decontamination and permanent decontamination should be dealt with separately.
  • We've been doing a lot of emergency decontamination work. For example, if you look at this diagram, you will notice that the bottom of this slide is where small children put their hands on. Every time the rain stream down the slide, more radioactive materials accumulate. There can be a difference in radiation level between the right side and the left side. If such difference occurs and if the average radiation of the slide is 1 microsievert, then one side can measure as high as 10 microsieverts. We should do more emergency decontamination work in such places.
  • The ground right under the roof gutter is also where children frequently put their hands on. If you use high pressure washer you can reduce the radiation level from 2 microsieverts to 0.5 microsievert.However, it is extremely difficult to lower the level to less than 0.5microsievert, because everything is contaminated. Buildings, trees, whole areas. You can lower radiation dose of one place, but very difficult to do that for the whole area.Then, how much will it cost when you seriously do the decontamination work? In case of "Itai-Itai Disease" caused by cadmium poisoning, to decontaminate half of cadmium-contaminated area of roughly 3,000 hectare, the government has spent 800 billion yen so far.How much money will be needed if we have to decontaminate the area 1,000 times as big?
  • Finally, Professor Kodama has 4 demands, although probably due to the time constraint he was able to elaborate only three:So, I'd like to make four urgent requests.First, I request that the Japanese government, as a national policy, innovate the way to measure radiation of food, soil, and water, through using the Japan's state-of-the-art technology such as semiconductor imaging detectors. This is absolutely within Japan's current technological capability.
  • Second, I request that the government enact a new law as soon as possible in order to reduce children's radiation exposure. Right now, what I'm doing is all illegal.The current "Radiation Damage Prevention Law" specifies the amount of radiation and the types of radionuclides that each institution can handle. Now Tokyo University is mobilizing its workforce in its twenty-seven Radioisotope Centers to help decontaminate Minami-Soma City, but many of the centers don't have a permission to handle cesium. It's illegal to transport it by cars. However, we cannot leave highly radioactive materials to mothers and teachers there, so we put them all in drums and bring them back to Tokyo. To receive them is illegal. Everything is illegal.
  • The Diet is to blame for leaving such situations as they are. There are many institutions in Japan, such as Radioisotope Centers at national universities, which have germanium detectors and other state-of-the-art detectors. But how can we, as the nation, protect our children if these institutions' hands are tied? This is the result of the gross negligence by the Diet.
  • Third, I request that the government as a national policy mobilize technological power of the private sector in order to decontaminate the soil. There are many companies with expertise of radiation decontamination; chemical companies such as Toray and Kurita, decontamination companies such as Chiyoda Technol and Atox, andconstruction companies such as Takenaka Corporation. Please mobilize their power to create a decontamination research center in Fukushima as soon as possible.
  • It will take tens of trillions of yen to do the decontamination work. I'm gravely concerned that it might become public works project involving concessions. [In other words, business as usual in Japan where only the businesses and politicians benefit.]We don't have the luxury to spare a single second considering the financial condition of the Japanese government. We must figure out how we really do the decontamination work.What on earth is the Diet doing, when 70,000 people are forced out of their homes and wandering?
D'coda Dcoda

NRDC Document Bank: NRDC's petitions to the NRC in response to the Near-Term Task Force... - 0 views

  • In July 2011 the NRDC Nuclear Program submitted to the Nuclear Regulatory Commission (NRC) twelve 10 CFR 2.206 petitions for immediate agency action and six 10 CFR 2.802 petitions for rulemaking that track the nuclear safety recommendations in the NRC Task Force's recently-released 90 day report on the lessons from the Fukushima Daiichi disaster. The 10 CFR 2.206 petitions ask the Commission to directly issue orders to nuclear power plant license holders on specific reactor safety upgrades. And the 10 CFR 2.802 rulemaking petitions request the NRC to commence a public process to alter specific rules that govern the nuclear industry's safety requirements. Prior to our petitions, the New York Times recently discussed the NRC's Near Term Task Force Review and also provided an explanation of the different processes that we have invoked. Here are brief descriptions of the specific petitions we filed.
  • 10 CFR 2.206 Petitions nuc_11081201a.pdf 2.1 Order licensees to reevaluate the seismic and flooding hazards at their sites against current NRC requirements and guidance, and if necessary, update the design basis and SSCs important to safety to protect against the updated hazards.[p.30] nuc_11081201b.pdf 2.3 Order licensees to perform seismic and flood protection walkdowns to identify and address plant-specific vulnerabilities and verify the adequacy of monitoring and maintenance for protection features such as watertight barriers and seals in the interim period until longer term actions are completed to update the design basis for external events. [p.30] nuc_11081201c.pdf 4.2 Order licensees to provide reasonable protection for equipment currently provided pursuant to 10 CFR 50.54(hh)(2) from the effects of design-basis external events and to add equipment as needed to address multiunit events while other requirements are being revised and implemented.[p.39]
  • nuc_11081201i.pdf 8.1 Order licensees to modify the EOP technical guidelines (required by Supplement 1, “Requirements for Emergency Response Capability,” to NUREG-0737, issued January 1983 (GL 82-33), to (1) include EOPs, SAMGs, and EDMGs in an integrated manner, (2) specify clear command and control strategies for their implementation, and (3) stipulate appropriate qualification and training for those who make decisions during emergencies.[p. 49] nuc_11081201j.pdf 8.3 Order licensees to modify each plant’s technical specifications to conform to the above changes.[p.50]
  • ...1 more annotation...
  • nuc_11081201k.pdf 9.3 Order licensees to do the following until rulemaking is complete:Determine and implement the required staff to fill all necessary positions for responding to a multiunit event. Add guidance to the emergency plan that documents how to perform a multiunit dose assessment (including releases from spent fuel pools) using the licensee's site-specific dose assessment software and approach.Conduct periodic training and exercises for multiunit and prolonged SBO scenarios. Practice (simulate) the identification and acquisition of offsite resources, to the extent possible.Ensure that EP equipment and facilities are sufficient for dealing with multiunit and prolonged SBO scenarios. Provide a means to power communications equipment needed to communicate onsite (e.g., radios for response teams and between facilities) and offsite (e.g., cellular telephones, satellite telephones) during a prolonged SBO.Maintain ERDS capability throughout the accident.[p.57]
D'coda Dcoda

Tepco concludes own crisis manual useless [09Oct11] - 0 views

  • Emergency measures based on belief cooling systems couldn’t fail Kyodo An in-house report from Tokyo Electric Power Co. has concluded its emergency manual was useless for handling the nuclear crisis at the Fukushima power plant and that the widely held belief that a hydrogen explosion might have damaged the No. 2 reactor is false. The report on Sunday indicates the manual was drafted on the assumption that the emergency generators — including the diesel backups — would keep the reactors’ cooling systems running no matter what. At the Fukushima No. 1 plant, however, none of the backup generators for stricken reactors 1 through 4 survived the March 11 tsunami. End Extract
D'coda Dcoda

Emergency press conference reveals 110 microsieverts per hour at Tokyo supermarket [28O... - 0 views

  • TOKYO, Oct. 28 — Breaking news from Mochizuki, “110 micro Sv/h in Setagaya.” “In Setagaya, Tokyo, ward mayor held an emergency press conference at 10PM,” says the report. They announced the 110 micro Sv/h near ‘Powerlarks Setagaya’ supermarket. “If an average citizen measured it, it might be way higher,” notes Mochizuki. Read More: Breaking News: 110 micro Sv/h in Setagaya
  • See also: <High dose> 110 Setagaya Super Micro SV on the road side -Mainichi, Oct. 28 (GOOGLE TRANSLATION)
D'coda Dcoda

TEPCO never pushed electrical safety plan at nuke plant [23Oct11] - 0 views

  • A plan to connect six reactors at the crippled Fukushima No. 1 nuclear power plant, which could have reduced the damage from the Great East Japan Earthquake and tsunami, never left the drawing board, according to sources. Tokyo Electric Power Co. sources said while consideration had been given in 2006 to connecting all sources of electricity at all six reactors, no decision was made because of technical problems. However, nuclear engineering experts said the work could have been implemented and added that overconfidence about the low possibility of all reactors losing all their electrical sources was likely behind the failure to proceed with the reconstruction work.
  • "TEPCO officials likely concluded that there was no need to spend time and money because of an overconfidence that a loss of electricity sources would never occur," said Tadahiro Katsuta, associate professor of nuclear engineering at Meiji University. "If the work had been carried out, there was the possibility that damage could have been reduced." After the March 11 tsunami hit the Fukushima No. 1 plant, the No. 1 to No. 4 reactors lost their electrical sources. The inability to properly cool the reactors led to a core meltdown and hydrogen explosions that severely damaged the reactors and spewed large amounts of radioactive materials into the atmosphere. The No. 5 and No. 6 reactors were connected in terms of electricity sources and the emergency diesel generator at the No. 6 reactor, which was the only one that continued to work, enabled cooling to continue at those two reactors.
  • As an emergency measure, TEPCO officials laid electrical cables between all six reactors by April 25. Because TEPCO proceeded with such work after the quake and tsunami, experts said if reconstruction work had been conducted in 2006, there was the possibility that a major accident could have even been prevented. According to former TEPCO executives, a plan was considered in 2006 to strengthen the electricity facilities at the Fukushima No. 1 plant to avoid a critical accident that might occur should all electrical sources be lost due to a natural disaster. The No. 1 to No. 4 reactors on the south side of the plant were connected by electrical cables and those four reactors could share electricity if the need arose.
  • ...2 more annotations...
  • The No. 5 and No. 6 reactors on the north side of the plant also shared electrical sources with each other, but those two reactors were not connected to the four to the south. The plan for reconstruction work considered installing steel towers to link the electrical cables or digging tunnels through which cable could connect all six reactors. The former TEPCO executive said, "An estimate of the construction needed for the reconstruction work, including related civil engineering work, totaled several billions of yen and there was a plan to go ahead with the work." However, according to an explanation by other TEPCO officials, there were many structures and buried objects that would have been a hindrance to laying cables in the plant and there were also concerns that if the electrical cables became too long a drop in voltage might have occurred. Those reasons led TEPCO officials to abandon any further consideration for more specific plans.
  • Katsuta, the Meiji University nuclear engineering professor, said the buried objects could have been moved and any voltage drop could have been overcome by using transformers. Shiori Ishino, a professor emeritus of nuclear engineering at the University of Tokyo, added, "Since they hurriedly implemented measures after the accident, why could they not have done similar work beforehand? A serious analysis of what was involved in the decision should be made." In response, a TEPCO spokesperson said while it is true that consideration was given for the reconstruction work at one time, there are no documents showing that a decision was ever made on it. "Connecting cables between the six reactors after the accident was nothing more than an immediate measure taken during an emergency," the spokesperson said.
D'coda Dcoda

Slaughter in Minamisoma [26Oct11] - 0 views

  • On location report from Minami Soma – Strontium continues to be detected – “Too early for evacuees to be returning home.” Nationally declared “emergency evacuation preparedness zones” have been simultaneously lifted, however excessive risks may remain. Lab results from a radioactive contamination survey commissioned by Minami Soma City Council yield shocking results. - Desipite the lifting of the “emergency evacuation preparedness zone” designation, the perception is that contamination questions linger. - 59,000 people lived within the 20-30km “emergency evacuation preparedness zone”, 28,000 have relocated. Citizens view the lifting of the designation as good news, but unease persists.
  • From a local council perspective, the sooner evacuees return to start rebuilding the better. - Citizens infuriated with fuzzy official statements regarding severity of contamination, particularly when they have to consider the safety of their own kids. - Local government testing reveals strontium contamination, further complicating the situation. 17 spots around Minami Soma were tested, and four locations showed 33 – 1,113 Bq/kg of strontium contamination, including 100 Bq/kg from an area previously covered by the recently lifted evacuation advisory zone. - Regarding the possibility of internal exposure, Strontium is much more serious than cesium. As explained by a researcher from the Japanese Atomic Energy Institute, biological half life of cesium is 100 days vs 50 years for Strontium, which mimics calcium in the body.
  • It’s reasonable to expect that where there is cesium, there is also strontium, however it takes much longer to run tests for strontium and there are very few labs equipped to run the tests. - On the same day that the evacuation advisory zone was lifted, MEXT (Ministry of Education, Culture, Sports, Science and Technology) finally released results of strontium testing carried out around the plant. - Of the samples, collected since June, Futuba (inside the 20km zone) was the highest, at 5,700 Bq/m2 (note the change in unit from kg to square meters). Of particular concern were results from within the lifted evacuation advisory zone: Minami Soma (three locations: 600, 260, 160 bq/m2), Tamura (610 Bq/m2), Kawauchi (380、130、39 Bq/m2) and Hirono (220、150、120、76、61 Bq/m2). - Plutonium also detected for the first time outside the plant, however official attitude is to ignore the results, as ‘compared to cesium the quantities are minuscule, therefore the focus will remain on cesium’.
  • ...1 more annotation...
  • Government decontamination efforts questioned by a local fish dealer, who points out that the road outside his shop, used by school students, was washed down with a high pressure hose. He says all the sand and dirt simply shifted and accumulated in the gutter, raising the radiation level there. Radioactive dirt then blows back onto the road from neighboring fields. - Ministry of Agriculture, Forestry and Fisheries finally decided in October to survey contamination in the hills and forested areas – every time the wind blows it brings more contamination down from the heavily contaminated hills. - In summary, ignoring isotopes other than cesium is not acceptable, after Chernobyl the Ukrainian govt. produced accurate contamination maps for each separate nucleotide, and Japan should do so urgently. Residents lack of faith in the government’s lifting of the zone is entirely understandable.
D'coda Dcoda

UCS Nuclear Power Safety & Security Recommendations | Union of Concerned Scientists [14... - 0 views

  • Download: U.S. Nuclear Power after Fukushima | U.S. Nuclear Power after Fukushima -- Summary
  • The report outlines and explains 23 specific recommendations, listed below.   = Key recommendation that the NRC should make a top priority. Preventing and Mitigating the Effects of Severe Accidents Extend the scope of regulations to include the prevention and mitigation of severe accidents. Require reactor owners to develop and test emergency procedures for situations when no AC or DC power is available for an extended period. Modify emergency planning requirements to ensure that everyone at significant risk from a severe accident--not just the people within the arbitrary 10-mile planning zone--is protected.
  • Improving the Safety and Security of Spent Fuel The NRC should require plant owners to move spent fuel at reactor sites from storage pools to dry casks when it has cooled enough to do so. The NRC should require reactor owners to improve the security of existing dry cask storage facilities. The NRC should require plant owners to significantly improve emergency procedures and operator training for spent fuel pool accidents Making Existing Reactors Safer The NRC should enforce its fire protection regulations and compel the owners of more than three dozen reactors to comply with regulations they currently violate.
  • ...2 more annotations...
  • Making Existing Reactors More Secure against Terrorist Attacks The NRC should revise its assumptions about terrorists' capabilities to ensure nuclear plants are adequately protected against credible threats, and these assumptions should be reviewed by U.S. intelligence agencies. The NRC should modify the way it judges force-on-force security exercises by assessing a plant's "margin to failure," rather than whether the plant merely passes or fails. The U.S. government should establish a program for licensing private security guards that would require successful completion of a federally supervised training course and periodic recertification. Making New Reactors More Secure against Terrrorist Attacks The NRC should require new reactor designs to be safer than existing reactors. The NRC should require new reactor designs to be more secure against land- and water-based terrorist attacks.
  • Improving the NRC's Cost-Benefit and Risk-Informed Analyses The NRC should increase the value it assigns to a human life in its cost-benefit analyses so the value is consistent with other government agencies. The NRC should require plant owners to calculcate the risk of fuel damage in spent fuel pools as well as reactor cores in all safety analyses. The NRC should not make decisions about reactor safety using probabilistic risk assessments (PRAs) until it has corrected its flawed application of this tool. Ensuring Public Participation The NRC should fully restore the public's right to obtain information and question witnesses in hearings about changes to existing power plant licenses and applications for new licenses.
D'coda Dcoda

Fukushima Emergency what can we do?: This from FB.. Corium quake? [31Mar13] - 0 views

  •  
    Anomaly could indicate the corium has sunk to the water table and set off an event
1 - 20 of 169 Next › Last »
Showing 20 items per page