United States Nuclear Regulatory Commission - Protecting People and the Environment

Transmittal of Reports Regarding Foreign Reactor Operating Experiences (Generic Letter 79-45)



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.

                                                                 7911260004 

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