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Watchdog says TEPCO nuclear disaster drill ‘unacceptable’ via The Asahi Shimbun

The government’s nuclear watchdog slammed Tokyo Electric Power Co.’s efforts as “unacceptable” in communicating with nuclear authorities during an emergency drill held at its Kashiwazaki-Kariwa nuclear plant.

TEPCO, operator of the crippled Fukushima No. 1 nuclear power plant, was among three utilities to receive the lowest of the three-level scores in terms of ability to share information expediently and accurately, the Nuclear Regulation Authority said July 25.

It was the first time for the company to be given the lowest score on communication skills in a yearly drill.

“It is unacceptable that TEPCO received a low rating, given that it was responsible for the Fukushima disaster,” an NRA official said. “TEPCO appears to be too compartmentalized for its relevant sections to work together and share information.”

The NRA is set to instruct the company to hold additional drills at the plant, which is located in Niigata Prefecture, if it receives another low rating.

The utility was slow in relaying information to the watchdog, and its briefing on its handling of the mock accident was inadequate, according to the NRA’s report.

“We could not respond sufficiently because the envisioned accident was harsh,” said Kiyoto Ishikawa, the chief of the plant’s publicity department, at a news conference.

The drill in question was carried out in March under the scenario of coping with a serious accident.

It involved difficult procedures to cope with a failure in the communication system to send such critical information as the pressure level in the reactors’ containment vessels to the NRA. Operators also simulated a string of maneuvers of the venting system to lower pressure inside the No. 6 reactor that suffered core damage.

“We had to deal with a tough situation because it proceeded with less time allotted for us than in a real accident,” Ishikawa said. “We are determined to make more efforts and improve our standing.”

The NRA’s assessment comes at a time when TEPCO seeks to bring the No. 6 and No. 7 reactors at the Kashiwazaki-Kariwa plant back on line in the near future to save expensive fuel costs incurred by the operation of its thermal power plants.

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The other plants that were rated on par with the Kashiwazaki-Kariwa plant in the evaluation of emergency drills were Hokuriku Electric Power Co.’s Shika plant in Ishikawa Prefecture and Chubu Electric Power Co.’s Hamaoka plant in Shizuoka Prefecture.

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