ML19224C663
| ML19224C663 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay, Diablo Canyon |
| Issue date: | 06/07/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Crane P PACIFIC GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7907060029 | |
| Download: ML19224C663 (1) | |
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o, UNITED STATES a ff pp,, fg( h NUCLEAR REGULATORY COMMISSION
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SUIT E 202, WALNUT CRE E K PL AZA WALNUI CR E E K, CALIFORNI A L1596 June 7, 1979 Docket flos. 50-133 50-275 50-323 Pacific Gas and Electric Company 77 Beale Street San Francisco, California 94106 Attention: Mr. Philip A. Crane, Jr.
Assistant General Counsel Gentlemen:
This Information f;otice 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.
flo specific action or response is requested at this time.
If further f;RC evaluations so indicate, an IE Circular, Bulletin, or fiRR 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 IRC Regional Office.
Sincerely, j:-
.[
.(.Engelken
,/ Director
Enclosures:
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1.
IE Information flotice fio. 79-15 2.
List of IE Information fetices Issued in 1979 cc w/encls:
W. Barr, PG&E W. A. Raymond, PG&E R. Ramsey, PG&E E. Weeks, PG&E, Humboldt Bay J. D. Worthington, PG&E a c. '
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79070600 2'7
Ui!ITED STATES NUCLEAR REGULATORY CO:1 MISSION OFFICE OF IriSPECTION AND ENFORCEMENT WASHINGTON, D.C.
205b5 June 7, 1979 IE Information Nt.
' 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 hace resulted in the emergency feedwater system remaining isolated during subsequent power operation.
Description of Circumstances On June 2 while Arkansas Nuclear One - Unit 1 was preparing for stm tup, an NRC inspector in the control room found that during a surveillanct test of the main feedwater check valves, the controls of the emergene feed-water system were positioned so that the system could not automatically respond if needed. The NRC 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 energency 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
] re-turn the system to normal, there was no assurance that emergency feedwater would be provided automatically if needed.
Following the Three tiile Island accident, the NRC required that operators be trained to initiate promptly the emergency feedwater system mant. ally if it does not come on automatically Thus, while no immediate safety hazard existed at the Arkansas Unit 1 plant b.cause of the inproper actio1, 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 progedures in performing the surveillance test.
Arkansas Power and Light Company has returned the plant to cold shutdown.
The June 2, 1979, NRC Order confirned 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 ass D'- - - = - ~
from those procedures.
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