ML19224C666
| ML19224C666 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/07/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Johari Moore SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| NUDOCS 7907060032 | |
| Download: ML19224C666 (1) | |
Text
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NUCLEAR REGULATORY COMMISSION 7~,/ C 2
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,,a WALNU T CR EE K, CALIFORNI A 9459G June 7, 1979 Docket flos. 50-206 50-361 50-362 Southern California Edison Company P. O. Box 800 2244 Walnut Grove Avenue Rosemead, California 91770 Attention: fir. Jack B. floore Vice Presicent Gentlemen:
This Information flotice 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.
I!o specific action or response is requested at this time.
If further f!RC evaluations so indicate, an IE Circular, Bulletin, or liRP, Generic Letter will be issued to recommend or request specific licensee actions.
If you have questions rega-ding the matter, pleas a contact the Director of the appropriate IIRC Regional Office.
Sincerely,
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.. Engelken (
(/ Director
Enclosures:
1.
IE Information flotice fio. 79-15 2.
List of IE Information flotices Issued in 197c cc w/ encl:
J. fl. Curran, SCE J. T. Head, SCE J. H. Drake, SCE 3G'
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UtlITED STATES NUCLEAR REGULATORY C0" MISSION OFFICE OF INSPECTION AND EtlFORCEMENT WASHIt'GTON, D.C.
20555 June 7, 1979 IE Information hotice No. 79-15 DEFICIENT PROCEDURES Summary On June 2,1979, at Arkansas Nuclear One - Unit 1, while observing conditions in the control room, an NRC inspector discovered an operational deficiency that could have resulted in the emergency feedwater system remaining isolated during subsequent power operation.
Description of Circunstances On June 2 while Arkansas Nuclear One - Unit I was preparing for startup, an NRC inspector in the control room found t iat during a surveillance test of the main feedwater check valves, the e.untrols of the emergency feed-water system were positioned so that the system could not automatically respond if needed. The NRC inspector found that the test procedurc being used by the licensed operators did not include, as it should have, instruc-tions either to bypass the eneroency feedwater system or to return it to normal.
The plant op3rators, without approved procedures covering this aspect of the test, bypassed the controls that would have started th?
feedwater system automatically.
Lacking a procedural requirement to re-turn the system to normal, there was no assurance that emercency feedwater would be provided automaticclly if needed.
Following the Three Mile Island accident, the NRC required that operators be trained to initiate promptly the emergency feedwater system manually if it does not come on automatically. Thus, while no ir: mediate safety hazard existed at the Ar':ansas Unit 1 plant because of the inproper-action, the NRC 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, NRC 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 proceduces, the adequacy of existing procedures, and until there is a m;d; W er -
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from those procedures.
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