ML19208B009

Reports Steps Taken Re Unqualified Electrical Equipment,Per IE Bulletin 79-01.Operating Personnel Being Trained Re Consequences of Drywell Sump Effluent Isolation Valve Failure.Procedures Are Being Revised

ML19208B009
Person / Time
Site:	Pilgrim
Issue date:	09/11/1979
From:	Andognini G BOSTON EDISON CO.
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
79-179, NUDOCS 7909180415
Download: ML19208B009 (2)

Text

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, BOSTON EQtSON COMPANY

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,,g g , September 11, 1979 NUCLEAM OPERATION 5 DEPARTMENT BECo Ltr. # 79-179 Mr. D. Eisenhut, Director Division of Operating Reactors Office of Nuclear Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Docket No. 50-293 License 50. DPR-35 Subj ect : Environmental Qualification of Class IE Equipment Update Report on Unqualified Equipment

Reference:

(a)BECo Letter #79-171 dated 8/28/79 (b)IE Bulletin #79-01

Dear Sirs:

Pursuant to the reporting requirements of Re'erence (b), this letter serves to inform you of steps taken by Boston Edison company regarding the unqualified electrical equipment reported in Reference (a).

The following actions are currently in progress:

(1) Operating personnel are being trained with respect to the nature and subsequent potential consequences of the postulated failure of the solenoid valves which actuate the drywell sump effluent isolation valves.

Training is expected to be completed on or about October 6,1979.

(2) Operating personnel are being instructed to take the following interim actions with regard to the drywell effluent isolation valves following a postulated LOCA incident, (a) Monitor isolation valve position indication in the Main Control Room.

(b) Monitor flow integrators to Radwaste Building Receiver Tanks.

(c) Monitor plant airborne activity.

(d) If steps a, b and c above indicate leakage, then isolate instrument air scoply valves and Chemical Waste Receiver Tank inlet valves, as appropriate, to obtain an alternate isolation. The valves required for this alternate isolation are all readily accessible to the oper-ator in the Reactor and Radwaste Buildings.

(3) The appropriate emergency procedures are being revised to reflect the interim operator actions specified in item (2) above.

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BOS EDISON COMPANY Mr. D. Eisenhut, Director Page 2 September We believe that these actions are responsive to your concerns and adequate to assure alternate isolation of the subject effluent lines until " qualified" solenoid valves can be implemented.

If you have any questions or comments, please do not hesitate to contact us.

Very truly yours ,

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cc: Mr. Boyce H. Grier Office of Inspection and Enforcement Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 vo ) .

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