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Many errors in TEPCO’s nuclear power plant examination documents at Kashiwazaki Kariwa Unit 3

January 19, 2023
On January 19, TEPCO Holdings revealed that 149 errors were found in the examination documents for the Kashiwazaki Kariwa Unit 3 nuclear power plant in Niigata Prefecture, which is under review by the Nuclear Regulation Authority before its 30th year of operation. 131 of the errors were made using information from Unit 2, which has already been examined.

TEPCO apologized at the review meeting on the same day, saying, “We should reflect on this. The Regulatory Commission said, “This is a matter that concerns the reliability of the documents, and we hope you will take it seriously,” and demanded that a recurrence of the problem be prevented.

According to TEPCO, because they did not know the names of the materials required for the documents, they used those of the Unit 2 reactor of the same type. The same document contained an error due to a programming error, which was discovered when the company checked for similar errors.

Kashiwazaki Kariwa Unit 3, which began operation in August 1993, is currently shut down and has not yet applied for an inspection to restart operations. Nuclear power plants are required to undergo an examination to check the management of their facilities before they reach 30 years of operation. Kyodo News
https://www.nikkei.com/article/DGXZQOUA19CCU0Z10C23A1000000/?fbclid=IwAR339KW18B9GAITAh2AdBAorc1cA-7vkU_OoWvyCT7G1ECB-RI8xeldvadc

February 3, 2023 Posted by | Japan | , , , | Leave a comment

Data rewriting and erroneous statements…Sloppy handling continues at Tsuruga Nuclear Power Plant Unit No.2 of JAERI, Regulatory Commission suggests termination of review if no improvement is made

Tsuruga Nuclear Power Plant (photo taken in January 2021)

December 19, 2022
At a special meeting on December 19, the Nuclear Regulation Authority (NRA) exchanged opinions with Mamoru Muramatsu, president of Japan Atomic Power Company (JAERI), and others regarding the review of Tsuruga Unit 2 (Fukui Prefecture), where inappropriate rewriting of geological data was discovered. Shinsuke Yamanaka, chairman of the regulatory commission, said that if the data is not improved in the future, “the commission will have to discuss whether to continue the examination,” and indicated that he would consider suspending or terminating the examination.
　The rewriting of the data was discovered in February 2020 when the regulatory commission pointed it out. In order to determine whether the fault directly under the reactor building was an active fault that could cause an earthquake, the state of the geological strata taken out by drilling was rewritten in 80 locations. Many other errors were also found.
　The regulatory commission’s examination, which had been suspended, resumed on March 9 because the company had established rules for entering data, but at that time, new errors were also found. The number of errors in the data has totaled 1,296 so far.
　At the meeting, Akira Ishiwata, a member of the committee in charge of reviewing earthquake and tsunami countermeasures, said, “There are 1,300 errors, and only JAEPCO would submit such materials. If there are any more errors, it will be difficult to continue the examination. Mr. Yamanaka expressed his distrust, asking, “Are they sure about their technical capabilities? (Nozomi Masui)
https://www.tokyo-np.co.jp/article/220955?fbclid=IwAR0zWkMDa8kLYoQqx-3FpsSe9F3BX2-Wui23ftKuWyptnwDgOWydI2QcdWU

January 3, 2023 Posted by | Japan | , | Leave a comment