ML19254C073
| ML19254C073 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 09/17/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Nichols T SOUTH CAROLINA ELECTRIC & GAS CO. |
| References | |
| NUDOCS 7910110264 | |
| Download: ML19254C073 (1) | |
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UNITED STATES A
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REGION 11
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101 htARIETTA ST., N.W., SUITE 3100 ATLANTA. GEORGIA 30303 SEP 171979 In Reply Refer To:
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South Carolina Electric and Gas Company Attn:
T. C. Nichols, Jr., Vice President Power Production and System Operations Post Office Box 764 Calunbia, South Carolina 29218 Gentlemen:
The enclosed Information Notice provides information with regard to a potential unreviewed safety question involving high energy lines and control systems.
Sincerely, Jamps. O'Rei y Director
Enclosures:
- 2. List of IE Information Notices Issued in the Last Six Months m
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w Accession No: 7908220112 SSINS:
6870 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 September 14, 1979 IE Information Notice No. 79-22 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 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 environmer. 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 syster 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 operators.
Westinghouse states that the consequences of such an t. vent 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 characterisitics of the safety systems. Further, Westinghouse has recommended to their customers that they review their systems to determine whether any unreviewed safety questions exist.
This 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 facilities. No specific action or response is requested at this time. If NRC evaluations.4o indicate, further licensee actions may be requested or required.
If you have quea ions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
No written response to this Information Notice is required.
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