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NRC Begins Special Inspection at LaSalle Nuclear

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By Editors of Power Engineering

The Nuclear Regulatory Commission has begun a special inspection at Unit 2 of the LaSalle Nuclear Generating Station to review a recent valve failure.

During a February refueling outage, workers discovered a valve in the high-pressure core spray system was damaged and was not able to open. The valve would typically provide cooling water for the reactor in the event of an accident or emergency.

“While this equipment failure did not result in an actual safety event, we have a number of questions our team of specialists will seek to answer, including the technical details of the issue, assessing if plant operators fully understand its causes, and determining if the problem could affect other plants using the same valve design,” said NRC Region III Administrator Cynthia D. Pederson.

A report on the team’s findings will be publicly available within 45 days of the end of the inspection.

LaSalle, 75 miles southwest of Chicago, has a capacity of 2,300 MW and was built in 1984. Last year, it was license extensions through 2043.

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