Group items tagged

70 percent of fuel rods in reactor core at Fukushima nuke plant damaged The pool for spent fuel at the No. 4 reactor of TEPCO's Fukushima No. 1 nuclear power plant is pictured in this Feb. 1, 2005, file photo. (Mainichi ) About 70 percent of the 400 fuel rods in the No. 1 reactor at the crippled Fukushima No. 1 Nuclear Power Plant are damaged, Tokyo Electric Power Co. (TEPCO) has revealed. In addition, some 30 percent of the 548 fuel rods in the No. 2 reactor core and 25 percent of those in the No. 3 reactor core are also thought to be damaged, the power company stated on April 6. The figures are based on analysis of radiation data collected from the side of the reactor pressure vessel between the March 11 earthquake and tsunami and March 15. Just after the earthquake hit, the No. 1-3 reactors were successfully shut down when control rods were inserted into the cores. However, the plant operators soon lost the ability to adequately cool the cores, and TEPCO believes it possible some of the nuclear fuel pellets inside the fuel rods may have melted and leaked from their metal sheathes. At the time of the quake the plant's No. 4 reactor was undergoing a routine inspection and had no fuel rods in its core, while reactors No. 5 and 6 were not operating.

Small cracks have again been detected in control rods used to control the fission process at two nuclear reactors in Sweden, media reports said Wednesday. Cracks were detected last year at one reactor at Forsmark, north of Stockholm, and one reactor at the Oskarshamn plant, in south- eastern Sweden. Several control rods were replaced at the end of the year, but some of the new rods appear to have faults. Chief executive Lars Turing of the Oskarshamn plant told Swedish radio news that the new rods may have been damaged at production, but a probe was underway. Reactor 3, one of three at Oskarshamn, is to remain offline due to maintenance work and the new finds were likely to delay the scheduled start-up in June. The Swedish Radiation Safety Authority said it would review the report from the operators, but did not rule out allowing the reactors to be restarted for a limited time. Sweden operated 12 nuclear reactors at the peak of its nuclear activity. Two at the Barseback plant in southern Sweden have been decommissioned, the most recent in May 2005.

Berlin- A damaged fuel rod sought since last week has been located inside one of Germany's 12 nuclear power stations, regulators said Wednesday. The jinxed plant at Kruemmel near Hamburg was shut down for two years by a transformer fire. It was crippled again July 4 by a short circuit and was then reported to have a problem in one or more of its 80,000 fuel rods. Engineers took the lid off the reactor to find the damaged uranium rod. The problems at Kruemmel have led to calls to retire the station and re-ignited debate in Germany about nuclear power as an election approaches. Anti-nuclear activists are also highlighting mismanagement of nuclear waste dumps in old salt mines. Wolfram Koenig, president of the Federal Radiation Safety Agency (BfS), said radioactive contaminated fluid had been found to have seeped to the bottom of one such dump, the Asse mine.

Some of the spent nuclear fuel rods stored in the No. 4 reactor building of the crisis-hit Fukushima Daiichi power plant were confirmed to be damaged, but most of them are believed to be in sound condition, plant operator Tokyo Electric Power Co. said Wednesday. The firm known as TEPCO said its analysis of a 400-milliliter water sample taken Tuesday from the No. 4 unit's spent nuclear fuel pool revealed the damage to some fuel rods in such a pool for the first time, as it detected higher-than-usual levels of radioactive iodine-131, cesium-134 and cesium-137. The No. 4 reactor, halted for a regular inspection before last month's earthquake and tsunami disaster, had all of its 1,331 spent fuel rods and 204 unused fuel rods stored in the pool for the maintenance work and the fuel was feared to have sustained damage from overheating. The cooling period for 548 of the 1,331 rods was shorter than that for others and the volume of decay heat emitted from the fuel in the No. 4 unit pool is larger compared with pools at other reactor buildings. According to TEPCO, radioactive iodine-131 amounting to 220 becquerels per cubic centimeter, cesium-134 of 88 becquerels and cesium-137 of 93 becquerels were detected in the pool water. Those substances are generated by nuclear fission. The government's Nuclear and Industrial Safety Agency said the confirmed radioactive materials were up to 100,000 times higher than normal but that the higher readings may have also been caused by the pouring of rainwater containing much radioactivity or particles of radiation-emitting rubble in the pool.

The Nuclear Regulatory Commission has given Entergy Nuclear permission to reduce the number of times it conducts tests on control rods, a key safety system at Vermont Yankee plant. In a decision released earlier this week, the NRC granted a license amendment to Entergy that will allow it to test the control rods on a monthly basis. The control rods are now tested weekly. Entergy filed the request in February 2008. The control rods are inserted in the reactor core in the event of an emergency or a power reduction to reduce the amount of nuclear reaction in the plant. Entergy Nuclear spokesman Laurence Smith said Friday that the plant had requested the reduction in order to put less stress on a "sensitive" component at the plant by needlessly testing it.

Record of Decision for the Complex Transformation Supplemental Programmatic Environmental Impact Statement--Tritium Research and Development, Flight Test Operations, and Major Environmental Test Facilities AGENCY: National Nuclear Security Administration, U.S. Department of Energy. [[Page 77657]] ACTION: Record of Decision. ----------------------------------------------------------------------- SUMMARY: The National Nuclear Security Administration (NNSA), a separately organized agency within the U.S. Department of Energy (DOE), is issuing this Record of Decision (ROD) for the continued transformation of the nuclear weapons complex (Complex). This ROD is based on information and analyses contained in the Complex Transformation Supplemental Programmatic Environmental Impact Statement (SPEIS) (DOE/EIS-0236-S4) issued on October 24, 2008 (73 FR 63460); comments received on the SPEIS; and other factors, including costs, technical and security considerations, and the missions of NNSA. The SPEIS analyzes the potential environmental impacts of alternatives for transforming the nuclear weapons complex into a smaller, more efficient enterprise that can respond to changing national security challenges and ensure the long-term safety, security, and reliability of the nuclear weapons stockpile.

Record of Decision for the Complex Transformation Supplemental Programmatic Environmental Impact Statement--Operations Involving Plutonium, Uranium, and the Assembly and Disassembly of Nuclear Weapons AGENCY: National Nuclear Security Administration, U.S. Department of Energy. ACTION: Record of decision. ----------------------------------------------------------------------- SUMMARY: The National Nuclear Security Administration (NNSA), a separately organized agency within the U.S. Department of Energy (DOE), is issuing this Record of Decision (ROD) for the continued transformation of the nuclear weapons complex (Complex). This ROD is based on information and analyses contained in the Complex Transformation Supplemental Programmatic Environmental Impact Statement (SPEIS) (DOE/EIS-0236-S4) issued on October 24, 2008 (73 FR 63460); comments received on the SPEIS; other NEPA analyses as noted; and other factors, including cost, technical and security considerations, and the missions of NNSA. The SPEIS analyzes the potential environmental impacts of alternatives for transforming the nuclear weapons complex into a smaller, more efficient enterprise that can respond to changing national security challenges and ensure the long-term safety, security, and reliability of the nuclear weapons stockpile.

Sweden shut down one of its nuclear reactors on Tuesday to check the plant's control rods after cracks were found in the rods at an identical plant, the Swedish Radiation Safety Authority (SSM) reports. The agency said it had been alerted last week that a routine annual inspection at the Oskarshamn nuclear plant in eastern Sweden had turned up cracks in Reactor 3's control rods, which are used to control the rate of fission of uranium and plutonium.

Berlin - Swedish electricity giant Vattenfall admitted Thursday to additional problems at one of its German nuclear power stations, which caught fire several days ago just after a two-year refit from a previous fire. Blunders at the Kruemmel power station have turned nuclear safety into an election issue in Germany. Though neither of the fires was in the reactor itself, Vattenfall said it had also discovered at least one of the 80,000 rods of uranium inside the reactor was "defective." The defect was not connected to the shutdown of the reactor during an electrical transformer fire on Saturday. Engineers are to take the lid off the idled reactor on Friday to search for the rods, Vattenfall said. Tuoma Hatakka, chief executive of Vattenfall Europe, the German subsidiary which runs several of the 12 nuclear power stations in Germany, insisted in Berlin, "My summary is simple: Kruemmel is safe."

Count Egon Lamprecht among the thousands of experts still perplexed and haunted by SL-1. Like other experts, Lamprecht has analyzed every detail of the world's first nuclear accident, which on Jan. 3, 1961, killed three men on what's now the site of Idaho National Laboratory. Like them, he knows the improper removal of a control rod from the infamous Stationary Low-Power Reactor Number One, or SL-1, led to a flash heating of water that raised the reactor 9 feet out of its base. In four milliseconds, hundreds of gallons of water were turned into super-heated steam. Perhaps most importantly, Lamprecht also wants to know why the control rod was removed. But Lamprecht, a 74-year-old Idaho Falls man whose favorite hobby is collecting and restoring classic cars, is different from the rest of the experts in one important way: He was there. The day of the SL-1 accident, Lamprecht was working as a firefighter for the U.S. Atomic Energy Commission, which operated a series of experimental nuclear reactors at the INL site.

Count Egon Lamprecht among the thousands of experts still perplexed and haunted by SL-1. Like other experts, Lamprecht has analyzed every detail of the world's first nuclear accident, which on Jan. 3, 1961, killed three men on what's now the site of Idaho National Laboratory. Like them, he knows the improper removal of a control rod from the infamous Stationary Low-Power Reactor Number One, or SL-1, led to a flash heating of water that raised the reactor 9 feet out of its base. In four milliseconds, hundreds of gallons of water were turned into super-heated steam. Perhaps most importantly, Lamprecht also wants to know why the control rod was removed. But Lamprecht, a 74-year-old Idaho Falls man whose favorite hobby is collecting and restoring classic cars, is different from the rest of the experts in one important way: He was there. The day of the SL-1 accident, Lamprecht was working as a firefighter for the U.S. Atomic Energy Commission, which operated a series of experimental nuclear reactors at the INL site.

When Coleen Ware walked into Turkey Point, she was shocked to see that the indicators showing control rod positions looked like something out of an early '70s sci-fi movie. On special assignment from the Institute of Nuclear Power Operations to teach managers of the South Dade plant about safety, she was surprised by the aged indicators, which show the position of the rods in the reactor core -- a central measure about how the core is functioning. ``There are the old gauges . . . where . . . a needle that goes around and around,'' Ware testified, saying they were ``not very reliable.'' When operators looked at the indicators daily, ``they'd be stuck.

When Coleen Ware walked into Turkey Point, she was shocked to see that the indicators showing control rod positions looked like something out of an early '70s sci-fi movie. On special assignment from the Institute of Nuclear Power Operations to teach managers of the South Dade plant about safety, she was surprised by the aged indicators, which show the position of the rods in the reactor core -- a central measure about how the core is functioning. ``There are the old gauges . . . where . . . a needle that goes around and around,'' Ware testified, saying they were ``not very reliable.'' When operators looked at the indicators daily, ``they'd be stuck.

"Twenty concrete vaults sit side-by-side, like self-storage containers, next to the Oyster Creek nuclear power plant. These concrete tombs hold fuel cells, each containing 12-foot rods of enriched uranium. The rods are toxic and radioactive and were never intended to be stored here indefinitely, among Ocean County's 560,000 residents. Nationwide, about 70,000 tons of fuel rods wait for long-term storage - the very long term. The Environmental Protection Agency estimates that spent fuel stored at New Jersey's four nuclear power plants will remain dangerous to humans for at least 10,000 years and harmful to the environment for 1 million years more. The industry generates about 2,200 tons more of the waste each year, and many companies have plans to expand nuclear power in the United States - PSEG wants to build a new plant in Salem County's Lower Alloways Creek Township."

The nuclear industry could be on the verge of a major expansion just as the government cancels a plan to store the waste. Where's it going to go? BAY CITY, Texas (CNNMoney.com) -- At a Texas power plant, two men in head-to-toe yellow jumpsuits are perched above a pool filled with still, crystal-clear water -- and nearly 20 years worth of nuclear waste. The 40-feet deep pool, about the size of an Olympic-sized swimming pool, is the current home to thousands of uranium-filled fuel rods -- the radioactive byproducts of a nuclear reactor. The men are using a robotic arm to position the rods sitting at the bottom of the pool. Pools such as this one are a temporary solution to a very long term problem: the hotly contested debate over what to do with the country's nuclear waste.

The nuclear industry could be on the verge of a major expansion just as the government cancels a plan to store the waste. Where's it going to go? BAY CITY, Texas (CNNMoney.com) -- At a Texas power plant, two men in head-to-toe yellow jumpsuits are perched above a pool filled with still, crystal-clear water -- and nearly 20 years worth of nuclear waste. The 40-feet deep pool, about the size of an Olympic-sized swimming pool, is the current home to thousands of uranium-filled fuel rods -- the radioactive byproducts of a nuclear reactor. The men are using a robotic arm to position the rods sitting at the bottom of the pool. Pools such as this one are a temporary solution to a very long term problem: the hotly contested debate over what to do with the country's nuclear waste.

"Download: Palisades Recurring Leakage (07/16/10) The Nuclear Regulatory Commission's (NRC) regulations (specifically Appendix B to 10 CFR Part 50) require that plant owners find and fix safety problems. At the Palisades nuclear plant in Michigan, there have been recurring leaks of reactor cooling water past the seals on the control rod drives. Such a leak forced operators to shut down the reactor on June 24, 2010, for yet another repair attempt. Workers have replaced the seals numerous times, trying different designs and materials. Workers have also modified and re-modified the ventilation system for the area where the control rod drive seals are located in attempts to prevent seal damage from high temperatures. As our brief describes, the Palisades' owner found it cannot fix this safety problem. This is where an effective regulator would step in. Safety regulations require safety problems to be found and fixed. The NRC must stop monitoring the repetitive failures at Palisades and take the steps necessary to ensue that the proper fix is finally found. "

Swedish power group Vattenfall [VATN.UL] said on Tuesday an inspection had revealed one broken control rod and cracks in about 30 percent of others at its Forsmark 3 reactor. Forsmark communications director Claes-Inge Andersson told Reuters that about 100 out of 169 rods had been inspected and cracks had been found in some 25-30 percent of them.

"Record of Decision: Final Environmental Impact Statement for Decommissioning and/or Long-Term Stewardship at the West Valley Demonstration Project and Western New York Nuclear Service Center AGENCY: U.S. Department of Energy. ACTION: Record of decision. SUMMARY: The U.S. Department of Energy (DOE) is issuing this Record of Decision (ROD), based on information and analyses contained in the Final Environmental Impact Statement for Decommissioning and/or Long- Term Stewardship at the West Valley Demonstration Project and Western New York Nuclear Service Center (Decommissioning and/or Long-Term Stewardship EIS) (DOE/EIS-0226) issued on January 29, 2010, comments received on the Final EIS, and other factors including cost and environmental stewardship considerations. The Decommissioning and/or Long-Term Stewardship EIS was prepared by DOE and the New York State Energy Research and Development Authority (NYSERDA) to examine the potential environmental impacts of the range of reasonable alternatives to meet DOE's responsibilities under the West Valley Demonstration Project (WVDP) Act and NYSERDA's responsibilities for management of the Western New York Nuclear Services Center (WNYNSC). This ROD addresses DOE decisions for actions at WNYNSC necessary to complete WVDP. NYSERDA will publish its decisions regarding actions at WNYNSC in a Findings Statement in the New York State Environmental Notice Bulletin. "

"TEPCO: Melted fuel ate into containment vessel The operator of the damaged Fukushima Daiichi nuclear power plant has announced the results of an analysis on the state of melted fuel in the plant's Number 1 unit. The Tokyo Electric Power Company, or TEPCO, and several research institutes made public their analyses on the melting of fuel rods at 3 of the plant's units at a government-sponsored study meeting on Wednesday. The analyses were based on temperatures, amounts of cooling water and other data. TEPCO said that in the worse case, all fuel rods in the plant's Number 1 reactor may have melted and dropped through its bottom into a containment vessel. The bottom of the vessel is concrete covered with a steel plate. The utility said the fuel may have eroded the bottom to a depth of 65 centimeters. The thinnest part of the section is only 37 centimeters thick. TEPCO also said as much as 57 percent of the fuel in the plant's Number 2 reactor and 63 percent in the Number 3 reactor may have melted, and that some of the melted fuel may have fallen through reactor vessels. Wednesday, November 30, 2011 20:02 +0900 (JST)"

ENVIRONMENT * There is no "safe" amount of radiation. Each new exposure can lead to the risk of cancer and harm the body's immune system. Radiation also can lead to spontaneous abortion, mental retardation, heart disease and leukemia. * Increased reliance on nuclear power plants threatens the water supply. Reactors must be near large bodies of water to create steam to power their turbines and cool fuel rods. Water at higher temperatures may be returned to streams, causing thermal pollution and stressing fish and other aquatic life. * If droughts become more common in the Southeast, nuclear plants will compete for water with other important uses. COST * Building a nuclear reactor is expensive, costing up to $6 billion. By comparison, the state budget totals $7 billion a year. * There are no guarantees. The regulatory process required to get a license to build and operate a nuclear plant is lengthy and expensive, and can end in rejection. * Because the risks are so high, power companies must pay more in interest on loans needed to build the plants. To cover that cost, consumers will see their power bills increase as the plants are being built. In a sense, consumers assume the risk. SAFETY * Regardless of new designs, safety procedures and rigorous staff training, there always is the risk of a catastrophic accident. * Opponents cite a 1982 congressional report that estimated a meltdown of one Duke Energy reactor could injure 88,000 people and cost more than $100 billion in 1980 dollars. Today, those figures would be higher because of the area's booming population and inflation. SECURITY * Nuclear plants could be a prime target for terrorists. An attack could injure thousands near a plant. * Technology used to run the plants could be stolen and used to make nuclear weapons. DISPOSAL * Scientists agree the best option is to bury "spent" nuclear fuel deep inside a mountain. But opposition to using tunnels in Nevada's Yucc

It's being described as a major step forward in the safe storage of the Humboldt Bay Power Plant's spent nuclear fuel as the federal government wrestles with where to store the nation's growing stockpile of radioactive stuff for the long-term. The Pacific Gas and Electric Co. announced Friday that the first of five massive containers of nuclear rods has been secured in the underground storage facility the power company began building at its King Salmon site in April.

A disaster narrowly avoided, a danger only spotted by chance - yet the company involved faces no prosecution. Channel 4 News tells the untold story of Sizewell A, one Britain's older nuclear power plants. These are details that, but for a Freedom of Information request, would have remained secret. Two years ago, a burst pipe inside the Sizewell A station led to a huge leak from the pond used to cool thousands of nuclear fuel rods. Sizewell lies in Suffolk, on the East coast of England. If the nuclear fuel rods had caught fire, the resulting radioactive plume could have landed on villages from Southwold and Dunwich in the North, to Thorpeness and Aldburgh in the South, and inland to Leiston and Saxmundum.