• Cooling pools or dry casks for nuclear waste: which is safer

    There are two ways to store nuclear waste: in pools of water, where the densely packed uranium rods are cooled by a constant flow of circulating water, or in dry casks — typically barrel-shaped steel-and-concrete structures that stand twenty feet high and sit outdoors — where the uranium loosely packed rods are cooled by passive air; there are 65,000 tons of nuclear waste in the United States, more than in any other nation, and this amount grows by about 2,200 tons each year; the Fukushima disaster demonstrated that dry casks were able to withstand the 11 March combination of earthquake and tsunami much better than cooling pools; the U.S. Nuclear Regulatory Commission must now decide whether cooling pools are safe enough to store nuclear waste, and even whether densely packing nuclear waste is safe

  • ElBaradei: nuclear still main alternative to oil

    Mohamed ElBaradei, former head of the UN International Atomic Energy Agency (IAEA) said that “Today, nuclear power is the only real alternative to fossil fuel as a source of a reliable supply”; he acknowledged that Fukushima represents a potentially significant setback for nuclear power, but said that “Chernobyl and Fukushima should be shown to be aberrations”

  • Tennessee may spend millions to improve nuclear reactor safety

    The Tennessee Valley Authority (TVA) is considering spending millions of dollars to bolster its six nuclear reactors against earthquakes and floods; TVA is the first American nuclear plant operator to declare safety changes following events in Japan; TVA is currently considering reducing the amount of fuel that it stores in its spent fuel pools instead transferring older fuel rods to passively cooled “dry casks” ; the operator will also add additional back up diesel generators, make improvements to electrical grids to make them more earthquake resistant, add small generators to recharge cell phone batteries and to keep lights on, and reinforce pipes that send cold water to spent fuel pools

  • Abandoning nuclear power would cost Germany billions

    Nuclear power is highly unpopular in Germany, and in the wake of the nuclear disaster in Japan, Germany chancellor Angela Merkel announced that Germany would abandon nuclear power generation (she called it “Atomausstieg,” or “nuclear exit”) and would gradually close its seventeen nuclear power plants; there is a debate in Germany about whether abandoning nuclear power would cost Germany 3 billion Euros a year – or only 2 billion Euros, as the government says it would

  • Experts: new U.S. nuclear reactors unlikely soon

    Experts on a panel at Stanford University say radiation leaks at Japan’s Fukushima plant could impact the future of nuclear energy in the United States and abroad; they said that nuclear safety improved after the historic disasters at Three Mile Island and Chernobyl. Richter, and that it was improved further after the 9/11 attacks; they expect similar safety reviews by the U.S. Nuclear Regulatory Commission following the Fukushima accident

  • NRC inspects Nebraska reactor radiation exposure

    On 3 April, workers at the Cooper Nuclear Station, located near Brownville, Nebraska removed a long tube contaminated with highly radioactive material through the bottom of the reactor vessel, rather than through the top as is usually done, triggering radiation alarms; the NRC is investigating

  • Five U.S. nuclear plants in earthquake zones

    Five active U.S. nuclear reactors — the Diablo Canyon Power Plant and San Onofre Nuclear Generating Station in California; the South Texas Project near the Gulf Coast; the Waterford Steam Electric Station in Louisiana; and the Brunswick Steam Electric Plant in North Carolina — are situated in seismic activity-prone zones

  • Concerns about Illinois nuclear safety trigger inspections

    The U.S. Nuclear Regulatory Commission (NRC) is currently performing Special Inspections at the Byron and Braidwood Nuclear plants in Illinois after issues were identified in February and March of 2011; at issue is the ability of pumps to cool the reactor in case of a reactor trip or any reason the system for heat removal became unavailable at both Byron and Braidwood stations which are similar in design

  • Easing contamination fears in Japan's food industry

    With much of Japan’s manufacturing sector, land, and critical infrastructure badly damaged from the March 11 earthquake and tsunami, dairy and rice manufacturers have struggled to produce enough to feed the nation; Japan produces all of its own milk, rice, and yogurt products, but domestic plants are operating far below full capacity; shortages may persist into the summer; as production ramps up, fears of contamination from radiation leaked from the Fukushima Daiichi nuclear power plant may dampen consumption; one analyst suggests that Japan institute a food tracking program that will allow consumers to track the production of food every step of the way to help ease fears

  • Release of radioactive water into ocean stopped

    Radioactive water stopped flowing from Japan’s damaged nuclear power plant into the Pacific Ocean Wednesday after a special material was used, the utility said; the release, which began Monday, was described as an unavoidable process to avert a much bigger problem resulting from the leakage of the highly contaminated water; in terms of volume, about three million gallons of low-level radioactive water will have been dumped into the seas; the flooded basement of the buildings and their underground trenches at Nos. 1, 2, and 3 reactors are believed to hold about 60,000 tons of the more highly radioactive water; this water, which is also preventing workers from doing other emergency work, eventually will be stored in tanks at the reactors’ nuclear waste disposal sites, the government nuclear safety agency said. Those tanks will be shipped by the end of this month, the agency said

  • Modeling shows limited spread of Fukushima's radioactive release in ocean

    Daily computer simulations are suggesting that, so far, the hazardous radioactive materials being released into the sea by the Fukushima nuclear plants are still largely restricted to areas near the coast; the powerful Kuroshiro current — the Pacific’s version of the Gulf Stream — tends to block contaminated seawater from flowing southward toward Tokyo Bay while picking up little contamination itself

  • IAEA: after Japan, no more nuclear "business as usual"

    The world cannot take a “business as usual” approach to nuclear power in the wake of the disaster in Japan, UN atomic watchdog chief Yukiya Amano said; “Thinking retrospectively, the measures taken by the operators as a safety measure (were) not sufficient to prevent this accident,” Amano said; he added that the crisis in Japan caused by the 11 March earthquake and tsunami “has enormous implications for nuclear power and confronts all of us with a major challenge”

  • Scientific explanation overturned -- good news for nuclear fusion

    A team of Duke University researchers has discovered, much to its surprise, that a long-accepted explanation of how nuclei collide to produce charged particles for electricity — a process receiving intense interest lately from scientists, entrepreneurs, and policy makers in the wake of Japan’s nuclear crisis — is flat out wrong; the discovery of the error makes nuclear reactors based on fusion more realistic

  • Subterranean salt beds to keep U.S. nuclear waste

    Beds of salt up to one kilometer thick lie within one or two kilometers of the surface across much of the United States; they were deposited hundreds of millions of years ago by evaporating seas; a new study suggests that since President Obama killed the only national nuclear waste burial program — the Yucca mountain site — the United States should look again at the pre-Yucca plan to bury nuclear waste in subterranean salt beds

  • Algae might help reduce nuclear waste

    The humble algae — Closterium moniliferum — might one day soon be used to help separate strontium from calcium in nuclear waste; if successful, the process could lead to a reduction in the amount of nuclear waste that is left over from nuclear power facilities, and might even help in cleanup when accidents occur such as the one in Chernobyl, Ukraine, that spewed great quantities of strontium into the surrounding environment