ML19249F302
| ML19249F302 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 09/17/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Weigand J GULF STATES UTILITIES CO. |
| References | |
| NUDOCS 7910110290 | |
| Download: ML19249F302 (1) | |
Text
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611 RYAN PLAZA DRIVE, SUITE 1000 AR LINGTON, TEXAS 75012 September 17, 1979 In Reply Refer To:
RIV Docket Nos.
50-458/IE Information Notice No. 79-22 50-459/IE Information Notice No. 79-22 Gulf States Utilities Attn:
Dr. J. G. Weigand General Manager, Nuclear Projects Post Office Box 2951 Beaumont, Texas 77704 Gentlemen:
The enclosed IE Information Notice provides information with regard to a potential unreviewed safety question involving high energy lines and control systems.
Sincerely, O'
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k,f k Karl V. Seyfri Director
Enclosures:
- 2. List of IL Information Notices Issued in the Last Six Months i 910110290 1n7 n E; p I V /
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UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 b Off IE Information Notice No. 79-22 Date:
Septcmber }4, 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 I facility. This notification was based on a continuing review by Westinghouse of the environmental qualifications of equipment that they supply for nuclear steau 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 systen 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 Inforaation to the pInnt operators.
Westinghouse states that the consequences of such an event could pos<:ibly be more limiting than results presented in Safety Analysis Reportn, however, Westinghouse also states that the severity of the results can be limited by operator actions together with operating characteristics of the safety syatems. Further, Westinghouse has recommended to their customorr that. they review their systems to determine whether any unreviewed safety questions exist.
This IE Information Notice is provided as an early notification of a possibly significant matter.
It is expected that recipients will review the information for possible applicability to their facilitics. No specific action or response 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 Regionel Office.
No written response to this Information Notice is required.
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