ML19224C668
| ML19224C668 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 06/07/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| References | |
| NUDOCS 7907060034 | |
| Download: ML19224C668 (1) | |
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SUIT E 202, WALNU T CR E E K PL AZA WALNUT CREF K. CALIFORNI A 94b95 June 7, 1979 Docket rio. 50-312 Sacramento Municipal Utility District P. O. Box 15830 Sacramento, California 95813 Attention: Mr. John J. fiattimoe Assistant General Manager Gentlemen:
This Information Notice is provided as an early notification of a possibly significant matter.
It is expected that recipients will review the informa-tion for possible applicability to their facilities.
f;o specific action or response is requested at this time.
If further f4RC evaluations so indicate, an IE Circular, Bulletin, or f;RR Generic Letter will be issued to recommend or request specific licensee actions.
If you have questions regarding the matter, please contact the Director of the appropriate f;RC Regional Office.
Sincerely,
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Enc h 3ures:
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IE Information f;otice f;o. 79-15 2.
List of IE Information flotices Issued in 7479 cc w/ encl:
R. J. Rodriguez, SMUD L. G. Schwieger, SMUD 7
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UtlITED STATES f;UCLEAR REGULATORY COMMISSIO:1 0FFICE OF IllSPECTI0tl A!!D EtiFORCEMEtlT WASHINGT0tl, D.C.
20555 June 7, 1979 IE Information ?!otice tio. 79-15 DEFICIEllT PROCEDURES Summary On June 2,1979, at Arkansas fluclear One - Unit 1, while observing conditions in the control room, an fiRC inspector discovered an operational deficie"cy that could have resulted in the emergency feedwater system remaining isolated during subsequent power operation.
Description of Circumstances On June 2 while Arkansas fluclear One - Unit I was preparing for startup, an
?!RC inspector in the control room found that during a surveillance test of the main feedwater check valves, the controls of the emergency feed-water system were positioned so that the system could not automatically respond if needed.
The !!RC inspector found that the test procedure being used by the licensed operators did not include, as it should have, instruc-tions either to bypass the emeraency feedwater system or to return it to normal. The plant operators, without approved procedures covering this aspect of the test, bypassed the controls that would have started the feedwater system automatically. Lacking a procedural requirement to re-turn the system to normal, there was no assurance that emercency feedwater would be provided automatically if needed.
Following the Three Mile Island accident, the !!RC required that operators be trained to initiate pronptly the emergency feedwater systen manually if it does not come on automatically. Thus, while no immediate safety hazard existed at the Arkansas Unit 1 plant because of the inproper action, the f!RC staff is concerned about the potential safety hazard of leaving the emergency feedwater system in the bypassed condition, about the possibility that other procedures at the Arkansas plant may be deficient and about the fact that the operators deviated from procedures in performing the surveillance test.
Arkansas Power and Light Company has returned the plant to cold shutdown.
The June 2, 1979, flRC Order confirmed the requirement for a cold shutdown until the Commission staff is satisfied with the utility's method of con-trolling the development of operating procedures, the adequacy of existing procedures, and until there is assurance that orerators will not deviate
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