Japan’s former Ambassador to Switzerland, Mr. Mitsuhei Murata, was invited to speak at the Public Hearing of the Budgetary Committee of the House of Councilors on March 22, 2012, on the Fukushima nuclear power plants accident. Before the Committee, Ambassador Murata strongly stated that if the crippled building of reactor unit 4—with 1,535 fuel rods in the spent fuel pool 100 feet (30 meters) above the ground—collapses, not only will it cause a shutdown of all six reactors but will also affect the common spent fuel pool containing 6,375 fuel rods, located some 50 meters from reactor 4. In both cases the radioactive rods are not protected by a containment vessel; dangerously, they are open to the air. This would certainly cause a global catastrophe like we have never before experienced. He stressed that the responsibility of Japan to the rest of the world is immeasurable. Such a catastrophe would affect us all for centuries. Ambassador Murata informed us that the total numbers of the spent fuel rods at the Fukushima Daiichi site excluding the rods in the pressure vessel is 11,421 (396+615+566+1,535+994+940+6375).
I received an astounding response from Mr. Alvarez [updated 4/5/12]: In recent times, more information about the spent fuel situation at the Fukushima-Dai-Ichi site has become known. It is my understanding that of the 1,532 spent fuel assemblies in reactor No. 304 assemblies are fresh and unirradiated. This then leaves 1,231 irradiated spent fuel rods in pool No. 4, which contain roughly 37 million curies (~1.4E+18 Becquerel) of long-lived radioactivity. The No. 4 pool is about 100 feet above ground, is structurally damaged and is exposed to the open elements. If an earthquake or other event were to cause this pool to drain this could result in a catastrophic radiological fire involving nearly 10 times the amount of Cs-137 released by the Chernobyl accident. The infrastructure to safely remove this material was destroyed as it was at the other three reactors. Spent reactor fuel cannot be simply lifted into the air by a crane as if it were routine cargo. In order to prevent severe radiation exposures, fires and possible explosions, it must be transferred at all times in water and heavily shielded structures into dry casks.. As this has never been done before, the removal of the spent fuel from the pools at the damaged Fukushima-Dai-Ichi reactors will require a major and time-consuming re-construction effort and will be charting in unknown waters. Despite the enormous destruction cased at the Da–Ichi site, dry casks holding a smaller amount of spent fuel appear to be unscathed. Based on U.S. Energy Department data, assuming a total of 11,138 spent fuel assemblies are being stored at the Dai-Ichi site, nearly all, which is in pools. They contain roughly 336 million curies (~1.2 E+19 Bq) of long-lived radioactivity. About 134 million curies is Cesium-137 — roughly 85 times the amount of Cs-137 released at the Chernobyl accident as estimated by the U.S. National Council on Radiation Protection (NCRP). The total spent reactor fuel inventory at the Fukushima-Daichi site contains nearly half of the total amount of Cs-137 estimated by the NCRP to have been released by all atmospheric nuclear weapons testing, Chernobyl, and world-wide reprocessing plants (~270 million curies or ~9.9 E+18 Becquerel). It is important for the public to understand that reactors that have been operating for decades, such as those at the Fukushima-Dai-Ichi site have generated some of the largest concentrations of radioactivity on the planet. Many of our readers might find it difficult to appreciate the actual meaning of the figure, yet we can grasp what 85 times more Cesium-137 than the Chernobyl would mean. It would destroy the world environment and our civilization. This is not rocket science, nor does it connect to the pugilistic debate over nuclear power plants. This is an issue of human survival.
After visiting Fukushima a year ago, Senator Ron Wyden warned that the situation was worse than reported … and urged Japan to accept international help to stabilize dangerous spent fuel pools.A year ago, an international coalition of nuclear scientists and non-profit groups called on the U.N. to coordinate a multi-national effort to stabilize the fuel pools. And see this.A year ago, former U.N. adviser Akio Matsumura – whose praises have been sung by Mikhail Gorbachev, U.S. Ambassadors Stephen Bosworth and Glenn Olds, and former U.S. Deputy Secretary of State and Goldman Sachs co-chair John C. Whitehead – noted:The current Japanese government has not yet mentioned the looming disaster, ostensibly to not incite panic in the public. Nevertheless, action must be taken quickly. *** We believe an independent, international team of structural engineers and other advisers must be assembled and deployed immediately.Yesterday – after Fukushima reactor operator Tepco’s recklessness and nickel-and-diming cheapness in dealing with the post-accident response caused new releases of radioactivity – the New York Times reported:Increasingly, experts are arguing that the plant’s operator, the Tokyo Electric Power Company, or Tepco, cannot be trusted to lead what is expected to be decades of cleanup and the decommissioning of the plant’s reactors without putting the public, and the environment, at risk. *** “The Fukushima Daiichi plant remains in an unstable condition, and there is concern that we cannot prevent another accident,” Shunichi Tanaka, chairman of the Nuclear Regulation Authority, said at a news conference. *** “No wonder the water is leaking,” said Hideo Komine, a professor in civil engineering at Ibaraki University, just south of Fukushima. He said that the outer protective lining should have been hundreds of times thicker. *** Muneo Morokuzu, a nuclear safety expert at the Tokyo University Graduate School of Public Policy, said that the plant required a more permanent solution that would reduce the flood of contaminated water into the plant in the first place, and that Tepco was simply unable to manage the situation. “It’s become obvious that Tepco is not at all capable of leading the cleanup,” he said. “It just doesn’t have the expertise, and because Fukushima Daiichi is never going to generate electricity again, every yen it spends on the decommissioning is thrown away.” “That creates an incentive to cut corners, which is very dangerous,” he said. “The government needs to step in, take charge and assemble experts and technology from around the world to handle the decommissioning instead.”This is just like BP’s massive efforts to hide the extent and damage from the oil spill – even though their approach led to greater oil pollution – in order to avoid costs. (And the big banks’ cover up of the extent and damage from criminal fraud on the U.S. economy.)AP provides additional details:A makeshift system of pipes, tanks and power cables meant to carry cooling water into the melted reactors and spent fuel pools inside shattered buildings remains highly vulnerable, Nuclear Regulation Authority chairman Shunichi Tanaka acknowledged Wednesday. *** The problems have raised doubts about whether the plant can stay intact through a decommissioning process that could take 40 years, prompting officials to compile risk-reduction measures and revise decommissioning plans. *** Just over the past three weeks, there have been at least eight accidents or problems at the plant, the nuclear watchdog said. *** Experts suspect the radioactive water has been leaking since early in the crisis, citing high contamination in fish caught in waters just off the plant. *** “The nuclear crisis is far from over,” the nationwide Mainichi newspaper said in a recent editorial. “There is a limit to what the patchwork operation can do on a jury-rigged system.”
