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D'coda Dcoda

The Intermittency of Fossil Fuels & Nuclear [19Aug11] - 0 views

  • You’ve likely heard this argument before: “The wind doesn’t always blow and the sun doesn’t always shine, so we can’t rely on renewable energy.” However, a series of recent events undermine the false dichotomy that renewable energies are unreliable and that coal, nuclear and natural gas are reliable.
  • There are too many reasons to list in a single blogpost why depending on fossil and nuclear energies is dangerous, but one emerging trend is that coal, natural gas and even nuclear energy are not as reliable as they are touted to be. Take for instance the nuclear disaster still unfolding in Japan. On March 11, that country experienced a massive earthquake and the resulting tsunami knocked out several nuclear reactors on the coast. Three days later, an operator of a nearby wind farm in Japan restarted its turbines - turbines that were intentionally turned off  immediately after the earthquake. Several countries, including France and Germany, are now considering complete phase-outs of nuclear energy in favor of offshore wind energy in the aftermath of the Japanese disaster. Even China has suspended its nuclear reactor plans while more offshore wind farms are being planned off that country’s coast.
  • In another example much closer to home, here in the Southeast, some of TVA’s nuclear fleet is operating at lower levels due to extreme temperatures. When the water temperatures in the Tennessee River reach more than 90 degrees, the TVA Browns Ferry nuclear reactors cannot discharge the already-heated power plant water into the river. If water temperatures become too high in a natural body of water, like a river, the ecosystem can be damaged and fish kills may occur. This problem isn’t limited to nuclear power plants either.
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  • Texas has been experiencing a terrible heat wave this summer - along with much of the rest of the country. According to the Dallas Morning News, this heat wave has caused more than 20 power plants to shut down, including coal and natural gas plants. On the other hand, Texan wind farms have been providing a steady, significant supply of electricity during the heat wave, in part because wind farms require no water to generate electricity. The American Wind Energy Association (AWEA) noted on their blog: “Wind plants are keeping the lights on and the air conditioners running for hundreds of thousands of homes in Texas.”
  • This near-threat of a blackout is not a one-time or seasonal ordeal for Texans. Earlier this year, when winter storms were hammering the Lone Star State, rolling blackouts occurred due to faltering fossil fuel plants. In February, 50 power plants failed and wind energy helped pick up the slack.
  • Although far from the steady winds of the Great Plains, Cape Wind Associates noted that if their offshore wind farm was already operational, the turbines would have been able to harness the power of the heat wave oppressing the Northeast, mostly at full capacity. Cape Wind, vying to be the nation’s first offshore wind farm, has a meteorological tower stationed off Nantucket Sound in Massachusetts. If Cape Wind had been built, it could have been using these oppressive heat waves to operate New England’s cooling air conditioners. These three examples would suggest that the reliability of fossil fuels and nuclear reactors has been overstated, as has the variability of wind.
  • So just how much electricity can wind energy realistically supply as a portion of the nation’s energy? A very thorough report completed by the U.S. Department of Energy in 2008 (completed during President George W. Bush’s tenure) presents one scenario where wind energy could provide 20% of the U.S.’s electrical power by 2030. To achieve this level, the U.S. Department of Energy estimates energy costs would increase only 50 cents per month per household. A more recent study, the Eastern Wind Integration and Transmission Study (EWITS), shows that wind could supply 30% of the Eastern Interconnect’s service area (all of the Eastern U.S. from Nebraska eastward) with the proper transmission upgrades. As wind farms become more spread out across the country, and are better connected to each other via transmission lines, the variability of wind energy further decreases. If the wind isn’t blowing in Nebraska, it may be blowing in North Carolina, or off the coast of Georgia and the electricity generated in any state can then be transported across the continent. A plan has been hatched in the European Union to acquire 50% of those member states’ electricity from wind energy by 2050 - mostly from offshore wind farms, spread around the continent and heavily connected with transmission lines.
  • With a significant amount of wind energy providing electricity in the U.S., what would happen if the wind ever stops blowing? Nothing really - the lights will stay on, refrigerators will keep running and air conditions will keep working. As it so happens, wind energy has made the U.S. electrical supply more diversified and protects us against periodic shut downs from those pesky, sometimes-unreliable fossil fuel power plants and nuclear reactors.
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    a series of recent events undermine the false dichotomy that renewable energies are unreliable and that coal, nuclear and natural gas are reliable.
D'coda Dcoda

Sunflowers Fail To Remove Radiation in Fukushima [19Sep11] - 0 views

  • An experiment to test the power of sunflowers to absorb toxic radiation has failed to prove effective near the site of the nuclear disaster at Fukushima, Japan.  The Asahi Shimbun reports that the sunflowers removed only .05 percent of the radioactive cesium in the ground, while the  removal of just over an inch (3 centimeters) of topsoil along with grass removed up to 97 percent of the radioactive cesium. It was hoped that sunflowers would concentrate radioactive waste and could then be removed more easily than the wholesale “scraping” of soil and compost that it seems will  be required. In the meantime scientists are studying ways to decontaminate the forests near the nuclear accident site. According to the Japan Times, the prefecture (county) where the plant is located is 70% forested, and efforts to date have focused on decontaminating urban areas. Removing the contaminated soil and other material from the forest requires such extreme removal methods that the forest’s ecosystem will be seriously damaged.
  • Whether the radiation is removed by scraping soil or removing plant matter, the radioactive waste still needs to be safely stored. The government has not yet selected a permanent storage site for the tons of soil and debris that needs to be sequestered. Anti-Nuclear Protests Hit Tokyo
  • The Japanese public’s trust in nuclear power is clearly ebbing, as tens of thousands of citizens took to the streets of Tokyo today (Monday) to protest nuclear power. Police estimated the crowd at 20,000 (while organizers claimed more) as protesters carried signs saying “Sayonara Nuclear Power” to urge the government to eliminate nuclear power from the nation’s energy grid.  Nuclear accounted for 30 percent of Japan’s energy use prior to the Fukushima incident. There have been energy shortages as 30 of the country’s 54 reactors have been taken off line to enable inspections. Large businesses have been asked to take measures to conserve energy, such as adjusting thermostats, varying schedules around peak demand and cutting back on overtime. It has been six months since three of the Fukushima nuclear plant’s six reactors experienced meltdowns following a catastrophic earthquake and tsunami. Surrounding air, soil and water was contaminated and 100,000 residents were forced to evacuate.
D'coda Dcoda

The Environmental Case for Nuclear Energy - Korea [26Sep11] - 0 views

  • Six months after the Fukushima disaster, the repercussions of history’s second-largest nuclear meltdown are still being felt, not only in Japan but around the world. Predictably, people are rethinking the wisdom of relying on nuclear power. The German and Swiss governments have pledged to phase out the use of nuclear power, and Italy has shelved plans to build new reactors. Public debate on future nuclear energy use continues in the United Kingdom, Japan, Finland, and other countries.So far, it is unclear what the reaction of the Korean government will be. Certainly, the public backlash to nuclear energy that has occurred elsewhere in the world is also evident in Korea; according to one study, opposition to nuclear energy in Korea has tripled since the Fukushima disaster. However, there are countervailing considerations here as well, which have caused policy-makers to move cautiously. Korea’s economy is often seen as particularly reliant on the use of nuclear power due to its lack of fossil fuel resources, while Korean companies are some of the world’s most important builders (and exporters) of nuclear power stations.
  • There are three primary reasons why nuclear power is safer and greener than power generated using conventional fossil fuels. First ― and most importantly ― nuclear power does not directly result in the emission of greenhouse gases. Even when you take a life-cycle approach and factor in the greenhouse gas emissions from the construction of the plant, there is no contest. Fossil fuels ― whether coal, oil, or natural gas ― create far more global warming.
  • The negative effects of climate change will vastly outweigh the human and environmental consequences of even a thousand Fukushimas. This is not the place to survey all the dire warnings that have been coming out of the scientific community; suffice it to quote U.N. Secretary General Ban Ki-moon’s concise statement that climate change is the world’s “only one truly existential threat … the great moral imperative of our era.” A warming earth will not only lead to death and displacement in far-off locales, either. Typhoons are already hitting the peninsula with greater intensity due to the warming air, and a recent study warns that global warming will cause Korea to see greatly increased rates of contagious diseases such as cholera and bacillary dysentery.
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  • As the world’s ninth largest emitter of greenhouse gases, it should be (and is) a major priority for Korea to reduce emissions, and realistically that can only be accomplished by increasing the use of nuclear power. As Barack Obama noted with regard to the United States’ energy consumption, “Nuclear energy remains our largest source of fuel that produces no carbon emissions. It’s that simple. (One plant) will cut carbon pollution by 16 million tons each year when compared to a similar coal plant. That’s like taking 3.5 million cars off the road.” Environmentalists have traditionally disdained nuclear power, but even green activists cannot argue with that logic, and increasing numbers of them ― Patrick Moore, James Lovelock, Stewart Brand and the late Bishop Hugh Montefiore being prominent examples ― have become supporters of the smart use of nuclear power.
  • Second, the immediate dangers to human health of conventional air pollution outweigh the dangers of nuclear radiation. In 2009, the Seoul Metropolitan Government measured an average PM10 (particulate) concentration in the city of 53.8 g/m3, a figure that is roughly twice the level in other developed nations. According to the Gyeonggi Research Institute, PM10 pollution leads to 10,000 premature deaths per year in and around Seoul, while the Korea Economic Institute has estimated its social cost at 10 trillion won. While sulfur dioxide levels in the region have decreased significantly since the 1980s, the concentration of nitrogen dioxide in the air has not decreased, and ground-level ozone levels remain high. Unlike fossil fuels, nuclear power does not result in the release of any of these dangerous pollutants that fill the skies around Seoul, creating health hazards that are no less serious for often going unnoticed.
  • And third, the environmental and safety consequences of extracting and transporting fossil fuels are far greater than those involved with the production of nuclear power. Korea is one of the largest importers of Indonesian coal for use in power plants, for example. This coal is not always mined with a high level of environmental and safety protections, with a predictable result of air, water, and land pollution in one of Asia’s most biologically sensitive ecosystems. Coal mining is also one of the world’s more dangerous occupations, as evidenced by the many tragic disasters involving poorly managed Chinese mines. While natural gas is certainly a better option than coal, its distribution too can be problematic, whether by ship or through the recently proposed pipeline that would slice down through Siberia and North Korea to provide direct access to Russian gas.
  • What about truly green renewable energy, some might ask ― solar, wind, geothermal, hydroelectric, and tidal energy? Of course, Korea would be a safer and more sustainable place if these clean renewable resources were able to cover the country’s energy needs. However, the country is not particularly well suited for hydroelectric projects, while the other forms of renewable energy production are expensive, and are unfortunately likely to remain so for the foreseeable future. The fact is that most Koreans will not want to pay the significantly higher energy prices that would result from the widespread use of clean renewables, and in a democratic society, the government is unlikely to force them to do so. Thus, we are left with two realistic options: fossil fuels or nuclear. From an environmental perspective, it would truly be a disaster to abandon the latter.
  • By Andrew Wolman Andrew Wolman is an assistant professor at the Hankuk University of Foreign Studies Graduate School of International and Area Studies, where he teaches international law and human rights.
D'coda Dcoda

Nuclear Energy in South Africa [4Sep11] - 0 views

  • Dr. Yvres Guenon from AREVA gave a good pitch at the recent SANEA talk on “The nuclear program is a true opportunity for South Africa. He started off stating that we weren’t alone in the energy epidemic; “don’t think you are the only country with bad decision makers” he said. Europe is in the same boat. In the past countries went coal as it was the only option, but in the future it will be about finding the ‘right mix’ of energy producers. Guenon’s solution is to include nuclear power in that mix.
  • The argument was a fair one – nuclear does have financial benefits to it. The cost might be a bit hefty in the beginning; but most (if not all) energy providers are. The one thing about nuclear is that the price of energy thereafter doesn’t change. What you pay today for your electricity will stay that way for the next 50 – 60 years. In his presentation he included a diagram that showed nuclear was the least in greenhouse gases. Europe doesn’t have many options for energy development but here in South Africa, where we are blessed with sun and the south-easter wind, we have a variety. Even though we can include renewable in our mix, Guenon showed that solar costs 10 times more than coal and wind was four times more.
  • Guenon’s main purpose of his presentation was also the job development and therefore economy improvement, that comes from nuclear power. As nuclear involvers building an entire plant consisting of a variety of technologies and includes a variety of industries there is huge potential in employment and expansion in industries. Other energy producers, such as solar or wind, involve a slice of professions and specific exclusive industries. Nuclear touches on engineers, technicians, welders, management and a wide variety of workers. When asked about the chances of an accident, Guenon simple answer was “about the same chance of a meteorite landing in your lounge.” It creates abundant energy at a fraction of the price, while creating job opportunities and improving the economy; all of this and to top it off – no coal. On the outside it seems to provide the answer to all our problems. So what’s the catch? “Dr Guenon!” A hand shot up in the audience. “What about waste?”
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  • Guenon that in France they have chosen to repossess the fuel, reduce the toxicity level as much a possible by running it through a chemical process (twice) and then putting it into a storage container which can hold it up to 300 years. The concept is that the technology currently is only a few decades old. Hopefully in a few more decades, or longer, research and technology improvements will find a solution to how to completely deal with the built up waste. It wasn’t mentioned if that was the case for the proposal in South Africa, nor was it mentioned what would happen if the container had a leak.
  • Here in South Africa there is another side to the plant. One proposed site for building the nuclear plant is only a few kilometres outside Cape Town in Bantamsklip Location, location, location Bantamsklip is within 50km of one of Cape Town’s biggest ‘holiday’ towns; Hermanus. Known for its unspoilt natural beauty, the area is the biodiversity core area of the Cape Floral Kingdom and is one of the UNESCO World Heritage Sites. The proposed site contains 800 plant species and 22 red data species, 6 of which grow no where else in the world.
  • The nuclear power plant will be right by Agulhas National Park, and on the edge of a threatened marine ecosystem. Due to the beauty of the area, it is a high tourist attraction. In another article [Age of Stupid] a woman from the U.K. refused to have wind plants built on her neighbours farm as it ‘spoilt the view,’ which frustrated a lot of the environmentalists in the audience, as if we don’t start investing in renewable energy there won’t be much of a view to enjoy.
  • In this case, however, ‘spoiling the view’ with a nuclear power plant doesn’t only mean damaging the tourism in the area, but also threatening protected species like Blue Cranes, due to the overhead power line collisions; also threatening the marine sanctuaries of the Southern Right Whales and Great White Sharks. According to Barry Clark who did a review of the Marine Impact Study for the Environmental Impact Assessment [EIA] for the proposed nuclear power station; continuous lowlevel dosing with chlorine is proposed as a means of reducing biofouling on the seawater intake pipes. Clark questions “the impacts of this are dismissed as being ‘very localised and are considered unlikely to have a significant negative impact on the receiving environment’ the source of which is the previous EIA for the Koeberg Power Station.
D'coda Dcoda

Obama Greenlights BP's Return to Drilling in the Gulf [24Oct11] - 0 views

  • A lot of people are not pleased with President Obama after he approved a plan for BP to drill in the Gulf of Mexico, the first of its kind since last year's Deepwater Horizon explosion. Among the upset factions is the top Democrat on the House Natural Resources Committee, Ed Markey. "Comprehensive safety legislation hasn't passed Congress, and BP hasn't paid the fines they owe for their spill, yet BP is being given back the keys to drill in the Gulf," he said. The New York Times explains the plan: It was another sign that oil exploration in the gulf is coming back to normal, although energy companies continue to complain that the permitting process for drilling new wells remains far slower than before the accident. The federal government’s approval of the BP plan to drill up to four exploratory wells nearly 200 miles from the Louisiana coast was positive news for BP, which has struggled to recover from the April 2010 accident that left 11 workers dead and spilled millions of barrels of oil into the gulf.
  • About those recovery efforts, a study published last week reported that seafood in the Gulf is still not safe for pregnant women and children to eat. All year, a number of environmentalists have been expressing doubts about the Gulf's still struggling ecosystem, despite BP asserting that the recovery effort was finishing up. "It's not OK down there," marine biologist Samantha Joye said in April. "There are a lot of very strange things going on – the turtles washing up on beaches, dolphins washing up on beaches, the crabs. It is just bizarre." The Times wasn't able to get BP to comment on the latest decision but pointed to a brief statement from the company that said, "We are working through the regulatory process."
Dan R.D.

Hanford's Nuclear Option - Page 1 - News - Seattle - Seattle Weekly [19Oct11] - 0 views

  • Department of Energy scientists allege catastrophic mismanagement of the costliest environmental cleanup in world history.
  • During Hanford's lifespan, 475 billion gallons of radioactive wastewater were released into the ground. Radioactive isotopes have made their way up the food chain in the Hanford ecosystem at an alarming rate. Coyote excrement frequently lights up Geigers, as these scavengers feast on varmints that live beneath the earth's surface. Deer also have nuclear radiation accumulating in their bones as a result of consuming local shrubbery and water.
  • The EPA has deemed Hanford the most contaminated site in North America—a jarring fact, as the Columbia River, lifeline for more than 10,000 farmers and dozens of commercial fisheries in the Pacific Northwest, surges along Hanford's eastern boundary.
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  • In 1989 Hanford changed from a nuclear-weapons outpost to a massive cleanup project. Since then, the site has become the largest and most costly environmental remediation the world has ever seen.
  • despite more than two decades of cleanup efforts and billions of dollars spent, only a tiny fraction of Hanford's radioactivity has been safely contained. And the final costs for the Hanford cleanup process could exceed $120 billion—higher even than the $100 billion tab for the International Space Station.
  • "We need alternatives to the current plan right now," Dr. Donald Alexander, a high-level DOE physical chemist working at Hanford, says in distress.
  • "One of the main problems at Hanford is that DOE is understaffed and overtasked," Alexander explains. "As such, we cannot conduct in-depth reviews of each of the individual systems in the facilities. Therefore there is a high likelihood that several systems will be found to be inoperable or not perform to expectations."
  • Currently, federal employees at DOE headquarters in Washington, D.C., are evaluating whether Bechtel's construction designs at the site have violated federal law under the Price-Anderson Amendments Act (PAAA). An amendment to the Atomic Energy Act of 1954, the PAAA governs liability issues for all non-military nuclear-facility construction in the United States, which includes Hanford.
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