NRC Generic Letter 79-45, Transmittal of Reports Regarding Foreign Reactor Operating Experiences

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GL79045

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555

SEP 25 1979

TO ALL POWER REACTOR LICENSEES

SUBJECT: TRANSMITTAL OF REPORTS REGARDING FOREIGN REACTOR OPERATING EXPERIENCES

The enclosed reports are provided to you for information and use in your reactor evaluations in light of the Three Mile Island Unit 2 accident. Enclosure 1 is an internal Westinghouse report which describes an incident involving a stuck-open power-operated relief valve that occurred at the Beznau Unit 1 reactor in Switzerland on August 20, 1974. This report is now a part of the official records of the President's Special Commission investigating the TMI-2 accident. Enclosure 2 is an internal NRC staff memo on this incident. Enclosure 3 is a report on a steam generator tube "rupture" incident at the Doel 2 nuclear power plant in Belgium.

If you have any questions about the enclosed information, please let us know.

Sincerely,

D. F. Ross, Jr., Director Bulletins and Orders Task Force

Enclosures:

1. Technical Report on Beznau Unit 1 Incident of August 20, 1974:

TG-1 Trip/Reactor Trip/Safety Injection Actuation

2. Memorandum dated May 15, 1979; Ashok Thadani to D. F. Ross, Jr.

3. Memorandum dated September 13, 1979; Darrell G. Eisenhut to Multiple

Addressees

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7911260004