ML19249F308
| ML19249F308 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 09/17/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 7910110297 | |
| Download: ML19249F308 (1) | |
Text
e Rtc o
UNITED STATES
[ '] "., gy h NUCLEAR REGULATORY COMMISSION Gf' ' F.//
E REGION IV S ,
((
611 RYAN PLAZA DRIVE, SUITE 1000 5.'
- ..+
September 17, 1979 In Reply Refer To:
RIV Docket Nos.
50-445/IE Information Notice No. 79-22 50-446/IE Information Notice No. 79-22 Texas Utilities Generating Company ATTN:
Mr. R. J. Gary, Executive Vice President and General Manager 2001 Bryan Tower Dallas, Texas 75201 Gentlemen:
The enclosed IE Information Notice provides intormation with regard to a potential unreviewed safety question involving high energy lines and control systems.
Sincerely, g
M/
darl V. Seyf
Director
Enclosures:
- 2. List of IE Information Notices Issued in the Last Six Months 1076 066 910 t 1. 02 97
UNITED d'.TES NUCIZAR REGULATL Y COMMISSION OFFICE OF INSPECTION AND EFFORCEMENT WASHINGTON, D.C.
20555 IE Information Hotice No. 79-22 Date:
September 14, 1979 Page 1 of 1 QUALIFICATION OF CONTROL SYSTEMS Public Service Electric and Gas Company notified the NRC of a potential unreviewed safety question at their Salem Unit 1 facility. This notification was based en a continuing review by Westinghouse of the environmental qualifications of equipment that they supply for nuclear steam supply systems.
Based on the present status of this effort, Westinghouse has informed their customers that the performance of non-safety grade equipment subjected to an adverse environment could impact the protective functions performed by safety grade equipment.
These non-safety grade systems include:
Steam generator power operated relief valve control system Pressurizer power operated relief valve control system Main feedwater control system Automatic rod control system These systems could potentially malfunction due to a high energy line break inside or outside of containment.
NRC is also concerned that the adverse environment could also give erroneous information to the plant oj. rr' ors.
Westinghouse states that the consequences of such an event could possibly be more limiting than results presented in Safety Analysis Reports, however, Westinghouse also states that the severity of the results can be limited by operator actions together with operating characteristics of the safety systems. Further, Westinghouse hi s recommended to their custowrs that they raview their systems to determine whether any unreviewed safety questions exist.
This IE Information Notice is provnded as an early notification of a possibly significant matter.
It is expected that recipients will review the information for possible applicability to their facilities. No specific action or responne is requested at this time.
If NRC evaluations so indicate, further licensee actions may be requested or required.
If you have questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
No written response to this Information Notice is required.
i ni
.