United States Nuclear Regulatory Commission - Protecting People and the Environment

BWR Scram Discharge System (Generic Letter 80-107)



GL80107 

                               UNITED STATES 
                       NUCLEAR REGULATORY COMMISSION 
                          WASHINGTON, D.C. 20555 
                                     
                                DEC 9 1980 

TO ALL BWR LICENSEES 

SUBJECT:  BWR SCRAM DISCHARGE SYSTEM 

Reference: (a) IE Bulletin 80-17 with Supplements 1, 2, and 3 

This letter transmits the staff's Generic Safety Evaluation Report (SER) 
regarding BWR Scram Discharge System dated December 1, 1980 for your 
information.  The SER recommends certain short-term actions in excess of 
those in Reference (a) which are considered necessary to assure the 
continued safe operation of General Electric (GE) BWR's with inadequate 
SDV-IV hydraulic coupling until permanent design changes are made. 

We are currently discussing schedular impacts with the BWR Owners Group 
relative to the implementation of these short-term requirements.  After a 
schedule for implementation for the short-term actions is resolved, we will 
issue appropriate correspondence to assure the short-term requirements are 
met. 

In addition, the criteria for permanent design changes affecting all 
operating GE BWR's is included in the SER.  With the exception of the 
staff's position on Diverse Instrumentation, these criteria represent the 
BWR Owners Group's positions.  We note that in response to our letter of 
October 1, 1980, all but one licensee* has agreed to adopt the BWR Owners 
Group criteria for establishing permanent modifications to their systems.  
These criteria are presently being evaluated by our Division of Safety 
Technology and will be the subject of future correspondence. 

                                        Sincerely, 


                                        Darrell G. Eisenhut, Director 
                                        Division of Licensing 

Enclosure:
As Stated 

*TVA has proposed modifications independent of the Owner's Group. 

Page Last Reviewed/Updated Monday, June 17, 2013