ML19249F303
| ML19249F303 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 09/17/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Eric Turner HOUSTON LIGHTING & POWER CO. |
| References | |
| NUDOCS 7910110291 | |
| Download: ML19249F303 (1) | |
Text
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'o UNITED STATES 8',
NUCLEAR REGULATORY COMMISSION
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.s REGION IV 9(([
611 RYAN PLAZA DRIVE, SUITE 1000 0,,
AR LINGToN, TE XAS 76012 September 17, 1979 In Reply Refer To:
RIV Docket Nos. 50-498/IE Infomation Notice No. 79-22 50-499/IE Infomation Notice No. 79-22 Houston Lighting & Power Company ATTN:
Mr. E. A. Turner, Vice President Power Plant Construction and Technical Services Post Office Box 1700 Houston, Texas 77001 Gentlemen:
The enclosed IE Infomation Notice provides information with regard to a potential unreviewed safety question involving high energy lines and control systems.
Sincerely, l
t Karl V. Seyfri Director
Enclosures:
- 1. IE Infomation Notice 79-22
- 2. List of IE Infomation Notices Issued in the Last Six Months I v( /
e 060 i910110291
UNITED STATES NUCLEAR REGULATORY CGmIISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
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IE Information Notice No. 79-22 Date: September 14, 1979 Page 1 of 1 QUALIFICATION OF CONTROL SYSTEMS Public Service Electric and Cas Ccmpany notified the NRC of a potential unreviewed safety question at their Salem Unit 1 facility. This notification was based on a continuing review by Westinghouse of the cueironmental qualifications of equipment that they supply for nuclear steam supply systems.
Based ou 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 equipmeat. These non-safety grade systens include:
Steam generator power operated relief valve control systen Pressuriner power operated relief valve control system Main feedwater control system Automatic rod control systen These systems could potentially malfunction 6ue to a high energy line break inside or outside of containment. NRC is aho concerned that the a' erse environment ceuld also give erroneous informtion to the p} nat operators.
Westinghouse states that the consequences of such an event could possibly be more limiting than results presented in Safety Analysir. 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 has recommended to their customers that they review their systems to determine whether any unreviewed nafety questions exist.
This IE Information Notice is provided as an early notifictLion of a possibly significant matter.
It is expected that recipients will review the informatie.
for possible applicability to their facilitics. No specific action or response is requested at this time.
If NRC evaluations so indicate, further licensee acticas may be requested or required.
If you have questions regarding this matter, please contact the Director of the approprit te NRC Regional Office.
No written response to this Information Notice is required.
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