DESCRIPTION

Pressurized water reactors are susceptible to certain types of hypothetical accidents that, under circumstances such as operation of the reactor beyond a critical time in its life, cou

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This issue was identified during plant design and emergency procedure reviews which raised questions as to whether certain safety actions have to be accomplished automatically or wheth

DESCRIPTION

In a San Onofre Unit 1 Preliminary Notification issued in September 1980, it was reported that, during testing, the licensee had identified a problem with the design of the diesel gene

DESCRIPTION

This issue concerns the slow loss of control air pressure in the scram system of BWRs.[1]Air pressure dropping at a certain

DESCRIPTION

Historical Background

This issue was raised by the staff following a review[1]^,

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Background

This issue addressed the high rate of reactor coolant pump (RCP) seal failures that challenge the makeup

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Historical Background

Many PWRs have no positive means of detecting boron dilution during cold shutdown.

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This issue originated from NUREG-0572[1]where the ACRS identified vibration-induced equipment

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Historical Background

This concern was raised[1]because of the potential for a high-altitude nuclear weapon detonati

DESCRIPTION

On November 10, 1979, an event occurred at the Oconee Power Station, Unit 3, that resulted in loss of power to a non-Class 1E 120-volt AC single-phase po