IAEA report on Fukushima slams lack of tsunami preparedness despite awareness of threat

Kyodo

The International Atomic Energy Agency criticized Tokyo Electric Power Co. and Japanese regulatory authorities for their failure to prevent the 2011 Fukushima No. 1 nuclear plant disaster despite knowing the risk of large tsunami hitting the facility, according to a copy of an IAEA report.

The U.N. nuclear watchdog said in the final report on the nuclear disaster triggered by a huge earthquake and tsunami in March 2011, obtained Sunday, that “the Fukushima Daiichi (No. 1) NPP (nuclear power plant) had some weaknesses which were not fully evaluated by a probabilistic safety assessment, as recommended by the IAEA safety standards.”

The paper, compiled by around 180 experts from 42 countries, is set to be submitted to the IAEA’s annual meeting in September after its board examines the 240-page summary in June.

The report addressing the causes and consequences of the Fukushima disaster as well as lessons learned is expected to serve as a reference for nuclear safety measures worldwide.

The IAEA said a new approach applied between 2007 and 2009 postulated a magnitude-8.3 quake off the coast of Fukushima that could lead to tsunami of around 15 meters hitting the No. 1 plant and inundating the main buildings.

Despite the analysis, Tepco, the old Nuclear and Industrial Safety Agency, which oversaw Japan’s nuclear industry at that time, and other organizations did not act, deciding instead that “further studies and investigations were needed.”

“Tepco did not take interim compensatory measures in response to these increased estimates of tsunami height, nor did NISA require Tepco to act promptly on these results,” the report says.

“Prior to the accident, there was not sufficient consideration of low probability, high consequence external events which remained undetected. This was in part because of the basic assumption in Japan, reinforced over many decades, that the robustness of the technical design of the nuclear plants would provide sufficient protection against postulated risks,” it says.

As a result, Tepco did not implement a sufficient safety assessment as recommended by the IAEA and lacked protection for the emergency diesel generators, battery rooms and other vital systems against tsunami-caused flooding, the paper adds.

“The operators were not fully prepared for the multiunit loss of power and the loss of cooling caused by the tsunami. Although Tepco had developed severe accident management guidelines, they did not cover such an unlikely combination of events,” the report says, also pointing to the lack of appropriate training for workers at the plant.

The IAEA called on countries that use, or plan to use, nuclear power to make continuous efforts to improve safety based on new findings and to be prepared to cope with natural disasters more severe than those predicted when nuclear power plants were designed.

  • Liars N. Fools

    The damning report that was foreseeable because the disaster was foreseeable. So the question is whether the Japanese nuclear clique 族 is going to do any self reflection. And the other question is whether the government — itself a huge part of the problem — going to create accountable institutions to both pay the reparations and to assure no recurrence.

    I am on the skeptics’ side on these matters.

  • Jack Work

    It took 180 “experts” from 42 countries to take 4 years to come to this conclusion? IAEA is from the same culture of idiots that caused the problem.

  • TeeJayH

    Put nuclear power plants on the edge of the ocean…on active fault lines…with significant earthquake issues…and have people run them that are more interested in profit than safety….what could possibly go wrong?

  • sighclops

    So, elephant in the room – where are the charges?

  • Richard Solomon

    TEPCO was warned about serious design flaws by some of its own experts a few years before 2007. It not only ignored these warnings. It refused to include the info in its annual report. Ie, it did want the public to get wind of these potentially catastrophic flaws in the plants’ systems. This makes TEPCO more than just culpable for what happened on 3/11. It makes them negligent. No way, however, that Abe, et al will hold them to it because Abe wants to restart the plants. Profits are clearly more important than public safety!

  • George Polley

    Well, the discussion can go round and round, and round again ad infinitum without any significant action taking place to protect the system and the citizens. As I see the situation, it is going around in perpetual circles, with status quo in the driver’s seat, and profits providing the rationale to do nothing. And all of it sitting atop one of the most active earthquake areas in the world. Cheerful, aren’t I?

  • Starviking

    I think I’ll wait for the report, but if these facts are true then a bigger question remains:

    Who failed to protect the lives of the 20,000 people killed by the tsunami?

  • primalxconvoy

    What’s this? a Japanese organisation, corrupt to the nuclear-core, being criticised by a international organisation on things most other countries have already got under wraps?

    Next you’ll be telling me that the Japanese have replied that they’re going to “set up a ten-year panel to look into this”…