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» TEPCO raises projected tunami height double

A tsunami of 26 meters would inundate the already-stricken Fukushima No. 1 power plant, causing a huge amount of radioactive substances to spill into the sea, according to Tokyo Electric Power Co.’s updated estimates.

TEPCO told a Nuclear Regulation Authority commission Oct. 3 that it raised its projected tsunami height to 26.3 meters–nearly double its previous estimate–and increased the scale of the largest potential earthquake by 1.5 times.

According to the new estimate, if such a towering tsunami struck the facility, hundreds of trillions of becquerels of cesium-137 could be released into the ocean from the basements of reactor buildings.

Other utilities have been raising the scale of the highest possible tsunami for individual plants to meet stricter safety standards introduced following the Fukushima disaster. But TEPCO had not revised its height estimate for tsunami because the new safety standards do not apply to the Fukushima No. 1 plant reactors, which are scheduled to be decommissioned.

However, due to the unique risk factors at the plant, including destroyed reactor buildings and accumulating contaminated water, the NRA demanded that TEPCO review its tsunami forecast and countermeasures.

<Media Report>
TEPCO doubles tsunami height in damage estimate for Fukushima plant (Asahi Newspaper)

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