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Sun, 2011-03-20 10:15 — mdmcdonald
Nuclear Engineering Issues

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Radioactive Fish Found In California: Contamination From Fukushima Disaster Still Lingers

Sun, 2013-02-24 15:12 — Kathy Gilbeaux

           

A fisherman displays his haul of Bluefin Tuna.

CLICK HERE: STUDY - Radiocesium in Pacific Bluefin Tuna Thunnus orientalis in 2012 Validates New Tracer Technique

huffingtonpost.com - by Aaron Sankin - February 22, 2013

Nearly two years after a powerful earthquake triggered a leak at Japan's Fukushima Dai-ichi nuclear plant, the effects of that disaster are still being felt on the other side of the planet.

A report released earlier this month by researchers at Stanford University's Hopkins Marine Station found that bluefin tuna caught just off the California coast tested positive for radiation stemming from the incident.

The study looked at the levels of radiocesium, one of the most common results of nuclear fission reactions, in Pacific Bluefun Tuna--largely as way to track the species' migratory patterns as the fish make their cross-oceanic journey in search of prey.

(READ COMPLETE ARTICLE)

TEPCO - Fukushima Nuclear Accident Analysis Report (Summary) - June 20, 2012

Tue, 2012-07-31 22:07 — Kathy Gilbeaux

      

Tokyo Electric Power Company, Inc. - June 20, 2012

This report supplements the December 2011 Interim Report with the addition of investigations and examinations carried out after the release of the Interim Report, from the following three perspectives:

In addition to the issues concerning and measures taken in regard to the facilities as written in the Interim Report, issues concerning and measures taken in regard to operations have also been added;

Items for which investigations had not yet been completed at the time of the release of the Interim Report have been added; and

Further investigation was conducted on the issues in question and added to the report.

・In this report, TEPCO has made an effort to learn from what it experienced as a party to this accident and from the compiled data, and has summarized the manifestation of the facts investigated, the causes leading to core damage, and measures for prevention. These will steadily be applied to the nuclear power stations it owns.

Retired Fukushima Engineers to Seek U.S. Assistance

Sun, 2012-07-29 20:36 — Kathy Gilbeaux

The Daily Yomiuri - Jiji Press - July 25, 2012

Retired Japanese engineers are set to embark on a monthlong tour of the United States to seek that country's support to realize their desire to help contain the Fukushima nuclear crisis.

The group wants to work at Tokyo Electric Power Co.'s crippled Fukushima No. 1 nuclear power plant in place of younger workers engaged in crisis-control work. The members of the Skilled Veterans Corps for Fukushima, headed by 73-year-old retired engineer Yasuteru Yamada, are planning to take over their radiation exposure risks.

But the organization has faced rejection from TEPCO and the government. The group hopes the U.S. visit will help their cause.

(READ COMPLETE ARTICLE)

Calculating the global health consequences of the Fukushima nuclear disaster

Sat, 2012-07-21 17:13 — Maeryn Obley

submitted by Luis Kun

homelandsecuritynewswire.com - July 18th, 2012

Radiation from Japan’s Fukushima Daiichi nuclear disaster may eventually cause approximately 130 deaths and 180 cases of cancer, mostly in Japan, Stanford researchers have calculated. The estimates have large uncertainty ranges, but contrast with previous claims that the radioactive release would likely cause no severe health effects. The numbers are in addition to the roughly 600 deaths caused by the evacuation of the area surrounding the nuclear plant directly after the March 2011 earthquake, tsunami, and meltdown.

(VIEW COMPLETE ARTICLE)

Fukushima Disaster “a Profoundly Man-Made Disaster”: Investigative Commission

Tue, 2012-07-10 01:17 — Kathy Gilbeaux

submitted by Luis Kun

Homeland Security News Wire - July 5, 2012

Executive Summary - Slideshare

Executive Summary - (88 page .PDF file)

NAIIC Report

The commission investigating the Fukushima disaster of March 2011 concluded that although the combination of the tsunami and earthquake was unprecedented in its ferocity, the disaster was largely man-made because it was amplified by what came before it and what followed it. The disaster itself, the Fukushima Nuclear Accident Independent Investigation Commission, said was sandwiched by practices and conduct which were the result of government-industry collusion and the worst conformist conventions of Japanese culture.

Japan Nuclear Restart Gets PM's Approval

Sun, 2012-06-17 12:39 — Maeryn Obley

Kaede Tanaka, 3, sits in her buggy with a Geiger counter placed on her lap, during an anti-nuclear protest in front of the Japanese prime minister's official residence in Tokyo June 8, 2012. (photo: Reuters)Kaede Tanaka, 3, sits in her buggy with a Geiger counter placed on her lap, during an anti-nuclear protest in front of the Japanese prime minister's official residence in Tokyo June 8, 2012. (photo: Reuters)

Justin McCurry, Guardian UK - readersupportednews.org - June 16th, 2012

Japan is to resume the use of nuclear power for the first time since last year's triple meltdown at Fukushima Daiichi power plant after the government on Saturday approved the restart of two idled reactors.

The decision to restart reactors three and four at Oi power plant in western Japan could pave the way for the resumption of operations at other atomic facilities, amid concern over power shortages during peak demand this summer.

The prime minister, Yoshihiko Noda, announced the restart after securing support from the mayor of Oi and the governor of Fukui prefecture, where Oi is located.

Sandia Labs Technology Used to Clean Up Fukushima After Disaster

Thu, 2012-06-07 00:26 — Kathy Gilbeaux

submitted by Luis Kun

Homeland Security News Wire - May 30, 2012

A Sandia Lab-developed technology — crystalline silico-titanate, or CST — is a molecular sieve that can separate highly volatile elements from radioactive wastewater; the technology has been used to remove radioactive material from more than forty-three million gallons of contaminated wastewater at Japan’s damaged Fukushima Daiichi nuclear power plant

A Sandia National Laboratories technology has been used to remove radioactive material from more than forty-three million gallons of contaminated wastewater at Japan’s damaged Fukushima Daiichi nuclear power plant. Sandia researchers had worked around the clock following the March 2011 disaster to show the technology worked in seawater, which was pumped in to cool the plant’s towers.

“It’s the kind of thing that sends a chill,” said Mark Rigali, manager of the geochemistry group at Sandia.

(READ COMPLETE ARTICLE)

Soundness Verification of Unit 4 Reactor Building at Fukushima Daiichi Nuclear Power Station - May 16, 2012

Sat, 2012-05-19 11:49 — Kathy Gilbeaux

      

Tokyo Electric Power Company (TEPCO) - May 16, 2012

1. Purpose of Soundness Inspection

In response to the concern that Unit 4 spent fuel pool may collapse,
we have provided the explanations below to prove its soundness.
We will continue our regular inspection 4 times a year to ensure
soundness until the fuel is removed.

  • 1. We have confirmed that the building has not tilted by measuring the distance
    between the water surface of the spent fuel pool and the floor surface of the
    building.
  • 2. Our analysis result shows that the reactor building including the spent fuel
    pool will not collapse even if an earthquake equivalent to the Tohoku-Pacific
    Ocean Earthquake (seismic intensity 6) occurs in the area.
  • 3. The seismic safety margin has improved by more than 20% by reinforcing
    the bottom of the spent fuel pool.
  • 4. Regular inspection (4 times a year) is done to confirm the soundness of the
    reactor building and the spent fuel pool.

(READ COMPLETE REPORT - 9 page.PDF file)

Canopy-Forming Kelps as California’s Coastal Dosimeter: 131I from Damaged Japanese Reactor Measured in Macrocystis Pyrifera

Sun, 2012-04-01 01:33 — Kathy Gilbeaux

                          This study indicates Kelp could act as a coastal dosimeter for California.

                 

Fukushima Reactor Water Level Shallower Than Thought

Tue, 2012-03-27 23:19 — Kathy Gilbeaux

yomiuri.co.jp - March 28, 2012

The water level in the containment vessel of the No. 2 reactor at the Fukushima No. 1 nuclear power plant is only about 60 centimeters deep, far shallower than previously assumed levels of about four meters, according to Tokyo Electric Power Co.

The lower-than-expected water level was discovered for the first time when the power utility used an industrial endoscope to check the crippled reactor's interior on Monday, TEPCO said.

According to some experts, it is possible that nuclear fuel that melted through the reactor's pressure vessel and accumulated on the bottom of the containment vessel in the aftermath of the March 11 earthquake and tsunami may not be completely covered in the water.

TEPCO said the water temperature in the vessel remained relatively low within a range of 48.5 C to 50 C. The discovery of the unexpectedly shallow water level will not affect TEPCO's judgment that the reactor is in a state of "cold shutdown."

http://www.yomiuri.co.jp/dy/national/T120327006202.htm

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