Fukushimas Ongoing Fallout
by JOHN LaFORGE
US papers dont often report on the radiation disaster continuing at Fukushima-Daiichi in Northeast Japan.
But June 17 the New York Times noted: Inside the complex, there are three wrecked reactor cores, twisted masses of hundreds of tons of highly radioactive uranium, plutonium, cesium and strontium. After the meltdown[s], which followed a tsunami and earthquake in 2011, most of the material in the reactors re-solidified, in difficult shapes and in confined spaces, wrapped around and through the structural parts of the reactors and the buildings. ¶ Or at least, that is what the engineers think. Nobody really knows, because nobody has yet examined many of the most important parts of the wreckage. Though three and a half years have passed, it is still too dangerous to climb inside for a look, and sending in a camera would risk more leaks.
The Great Eastern Japan Earthquake and tsunami caused a Station Black Out at Fukushima ¾ the total loss of power used to run cooling mechanisms ¾ and the consequent melting of fuel rods dispersed massive amounts of radiation to the air and to the Pacific.
The Tokyo Electric Power Co (Tepco), owners of the Fukushima wreckage, has said it would take 40 years to clean up the disaster. Tepcos number was probably pulled out of the thin air, because owners of the undamaged Kewaunee reactor in Wisconsin, which shut down last April, said decommissioning of Kewaunee would take 40 years.
Radiation Tripled in Pacific Albacore Tuna since Triple Meltdowns
Radioactive cesium-137 levels in Pacific albacore tuna have tripled since the triple meltdowns at Fukushima-Daiichi in Japan, according to a study published in Environmental Science and Technology.
Delvan Neville, lead author of the study and a graduate research assistant in the Department of Nuclear Engineering and Radiation Health Physics at Oregon State University, told the Statesman Journal Apr. 28, You cant say there is absolutely zero risk because any radiation is assumed to carry at least some small risk.
Jason Phillips, a co-author of the report, said 26 of the large Pacific fish were analyzed from 2008 to 2012. If we were going to see it [cesium-137] in something, we would see it in albacore or other high-level predators.
Dr. Steve Starr, Director of Clinical Laboratory Science Program, University of Missouri-Columbia, noted in a recent lecture, Cesium 137 tends to bio-accumulate in plants and animals, which means it cannot be excreted faster than it is being ingested. Thus, as it accumulates, it increases in its concentration in the plants or animals that are routinely ingesting it. Cesium-137 also tends to bio-magnify as it moves up the food chain. This means it becomes progressively more concentrated in predator species.
As US Agency Hushed-up Dangers to US Reactors; Fukushima Owners Under-reported Radiation Exposures
NBC News reported Mar. 10 that internal emails by staff at the Nuclear Regulatory Commission prove the agency deliberately down-played known earthquake and tsunami vulnerabilities at aging US reactors in the early days of the Fukushima catastrophe. NBC said the emails, show that the campaign to reassure the public about Americas nuclear industry came as the agencys [NRCs] own experts were questioning US safety standards and scrambling to determine whether new rules were needed to ensure that the meltdown[s] occurring at the Japanese [site] could not occur here.
NBC said the emails reveal the NRCs efforts to protect the industry it is supposed to regulate. The news network went as far as to say, Dating back to the Three Mile Island nuclear crisis in 1979, many nuclear watchdogs and critics have said that the NRC acts first to protect the industry, and its own reputation.
The Nuclear Regulatory Commission was helped in misleading the public by Tepco, which repeatedly underestimated internal radiation exposures of its workers involved in immediate emergency response, according to Japans Health, Labor and Welfare Ministry, Asahi Shimbun reported.
Last July, the Ministry reviewed exposure data on around workers and revealed that reported exposure levels for 452 out of 1,300 workers surveyed were too low. After that announcement, the Ministry looked at records of the remaining 6,200 workers, and in late March it announced 142 additional cases of underreporting.
TEPCO did not have whole-body radiation counters when the radiation disaster began, so true contamination measurements were not possible.
Contaminated Soil and Cemeteries May be Moved from Fukushima
Japans federal government announced in late May that it will move thousands of tons of radioactively contaminated soil ¾ scraped from school yards and elsewhere during decontamination efforts ¾ outside Fukushima Prefecture within 30 years after first keeping it in storage in the heavily-contaminated prefecture, according to the daily Mainichi Japan, May 27.
New federal law will be needed to allow Japans Environmental Safety Corporation to operate the temporary dumps.
In a macabre aspect of compensating for areas made radioactively uninhabitable by fallout from the meltdowns, Japan is considering paying for new cemeteries and reburying the remains of people now buried in radioactive exclusion zones.
Food Not Monitored for Radiation Causing Internal Contamination
The Japan Times reported June 17, that eating unchecked homegrown vegetables and wild game from radiation-tainted areas on a regular basis can lead to high levels of internal radiation exposure.
According to a study published in the US online science journal PLOS ONE, Levels of radioactive cesium detected in the bodies of the studys participants declined once they stopped eating highly contaminated food. The studys authors called for increasing public awareness of radiation-risky foods especially at a time when public interest appears to be dwindling.
Soil from the seafloor collected about 6 kilometers from the wrecked reactors contains as much 2,700 Becquerels of cesium-137 per kilogram, according to Japans Nuclear Regulation Authority June 14.
In Aug. 2012, Tepco reported an all-time record 25,800 Becquerels-per-kilogram in two fish known as greenling caught in 20 kilometers of the stricken reactors. There may be radiation hot spots on the seabed, a TEPCO official said then.
The wrecked reactors spewed enormous, unprecedented volumes of radioactive materials into the Pacific Ocean where cesium levels near Fukushima ballooned to an astonishing 50 million times pre-disaster levels (and continue to do so, 3.5 years after it began).
The Nuclear Regulation Authority said that it is difficult to assess the figure because there is no standard against which evaluations can be made, but that its research would continue.
Note to Japans NRA: for a baseline standard, check seabed levels of cesium off any area free of nuclear reactor effluent.
John LaForge is a co-director of Nukewatch in Wisconsin and edits its Quarterly newsletter.