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'Hanlight 1 Unit' Intermediate Survey Announces ... "Maneuvering to the Mistakes of Calculation Mistakes"

2019-06-24T04:21:56.785Z

The Nuclear Safety Commission today announced the results of an interim report on the sudden increase in heat output at Hanbit Nuclear Power Plant No.1. It has been revealed that an unqualified man controlled the reactor and violated operating regulations and nuclear safety laws.



<Anchor>

The Nuclear Safety Commission today announced the results of an interim report on the surge in heat output at Hanbit Nuclear Power Plant No.1. It has been revealed that an unqualified man controlled the reactor and violated operating regulations and nuclear safety laws.

Jung Kyoung-hee reporter reports.

<Reporter>

At 10 am on May 10, the heat output of Hanvit nuclear power plant 1 in Yeonggwang, Jeollanam province exceeded the limit of 5%, which was 18%.

According to the Nuclear Safety Act, if the heat output exceeds 5%, the reactor must be shut down immediately, but not until 10 hours after the occurrence of the incident for 12 hours.

The Nuclear Safety Commission, which conducted a special investigation with the special judicial police, today released the interim findings.

At first, I found that the heat output of the reactor was surging in the process of excessive withdrawal of the control rod.

At that time, the deputy chief of the nuclear reactor was found to have forcibly calculated the threshold value and forcibly removed the control rod.

The reactor supervisor was the first to experience maneuvering and did not receive training to supplement it.

In particular, it was confirmed that a maintenance worker who was not an authorized person controlled the control rod without directing or supervising the supervisor.

The "important pre-work meeting" that should be performed for each worker only was carried out only for the first time, and the staff who exchanged work did not understand the manual stop procedure properly.

As a result of the safety check, there were no safety problems with the fuel rod and control rod.

The Nuclear Safety Commission said that after thoroughly analyzing the causes, it will prepare measures to prevent comprehensive recurrence.

Source: sbskr

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