ML19249F313
| ML19249F313 | |
| Person / Time | |
|---|---|
| Site: | Skagit |
| Issue date: | 09/17/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Jacobsen G PUGET SOUND POWER & LIGHT CO. |
| References | |
| NUDOCS 7910110302 | |
| Download: ML19249F313 (1) | |
Text
'o UNITED STATES 7/
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NUCLEAR REGULATORY COMMISSION f
REGION V oO f
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?990 N. CALIFORNIA DOULEVARD b
SUITE 202, WALNUT CRE EK PLAZA e
t WALNUT CREE K, CAllFORNIA 94596 September 17, 1979 Docket Nos. 50-522 50-523 Puget Sound Power and Light Company Puget Power Building Bellevue, Washington 98009 Attention: Mr. G. W. Jacobsen Project Manager - Nuclear Gentlemen:
The enclosed Information Notice No. 79-22 provides information with regard to a potential unreviewed safety ouestion involving high energy lines and control systems.
Sincerely, n{QbwpOA R. H. Engelken Director
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Enclosures:
1.
List of IE Information Notices Issued in Last Six Months 1076 076 0302 3
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oo Accession No: 79082201M SSINS:
6870 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND EilFORCEMEllT WASHIflGTON, D.C.
20F55 September 14, 1979 IE Information Notice No. 79-22 OUALIFICATIOP OF CONTROL SYSTEMS Public Service Electric and Gas Company notified the flRC of a potential unreviewed safety question at their Salem Unit 1 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 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. IIRC is also concerned that the adverse environment could also give erroneous information to the plant operators.
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 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 natter.
It is expected that recipients will review the information for possible applicability to their facilities, tio specific action or response is requested at this time.
If NRC evaluations so indicate, fur +her licensee actions may be requested or required.
If you have questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
fio written responsa to this Information flotice is required.
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