ML19309C280

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Responds to NRC 800327 Telcon Request for Info Re Unscheduled Entries of Drywell from 750101 to Present. Submits Info for Period Covering 770801 to Present
ML19309C280
Person / Time
Site: Pilgrim
Issue date: 04/01/1980
From: Andognini G
BOSTON EDISON CO.
To: Ippolito T
Office of Nuclear Reactor Regulation
References
80-51, NUDOCS 8004080398
Download: ML19309C280 (2)


Text

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EOSTON EDISON COMPANY

, GENamak Orrects 500 Govtstou erster sostem. MassacNuotits 02199 G. camb AmoOGNiM8 i supt einv a ssot NT NucLEAN OptmatiONS OtWaS?tesNT l April 1, 1980 BEco Ltr. #80-51 ,

Mr. Thomas A. Ippolito, Chief  !

Operating Reactors Branch #3 Division of Operating Reactors Office of Nucicar Reactor Regulation ,

1 U.S. Nuclear Regulatory Commission "

j Washington, D. C. 20555 I t License No. DPR-35 Docket No. 50-293 [

Dear Sir:

I In a telecon on 3/27/80 you requested information relative to unscheduled j entries of the drywell for the time frame 1/1/75 to present. Due to the manpower commitments surrounding the ongoing refueling outage effort, it '

was only possible to obtain the requested information from 8/1/77 to the present. ,

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Response

1. A table is attached listing the requested data.

t

2. There have been no provisions considered to detect and reduce RCS leakage without entry beyond the originally installed monitoring equipment and j equipment installed in response to NUREG 0578.
3. The plant did not operate with RCS leakage in the contoinment during the '

researched time period. -

I We hope the information provided is responsive to your needs and if you have any further questions please contact us.

Very truly yours,

/)oo/

s

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8 0 04 0 8039g l 1

Response to Item I e

Duration of Date of entry Reason for Entry Shutdown Results 4/78 Inboard MSIV disk sten separation 178 hours0.00206 days <br />0.0494 hours <br />2.943122e-4 weeks <br />6.7729e-5 months <br /> Valve repaired 10/78 Relief Valve Malfunction 438 hours0.00507 days <br />0.122 hours <br />7.242063e-4 weeks <br />1.66659e-4 months <br /> Valve repaired 3/79 SRM/IRM Malfunction 111 hours0.00128 days <br />0.0308 hours <br />1.835317e-4 weeks <br />4.22355e-5 months <br /> Repaired 6/79 Relief Valve Leaking 40.1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> Repaired 7/79 MSIV Timing Out of Specs 28.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> Retimed 7/79 Relief Valve Malfunction 85.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> Repaired 8

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