ML20126F019

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RO-81-01/1P:on 810209,Class I Inservice Insp of LPCI Sys, Subsys B,Revealed Flow in Pipe Weld Between Primary Containment Penetration & Inboard Isolation Check Valve. Cause Not Known.Investigation in Progress
ML20126F019
Person / Time
Site: Millstone Dominion icon.png
Issue date: 02/10/1981
From: Mroczka E
NORTHEAST UTILITIES
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
MP-1-1711, RO-81-01-1P, RO-81-1-1P, NUDOCS 8103050629
Download: ML20126F019 (1)


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February 10, 1981

'ItP-1-1711 Mr. Boyce H. Grier 0

Director, Region 1 e

Office of Inspection and Enforcemnt d' {V U.S. Nuclear Regulatary Cortnission

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Provisional license DPR-21

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Docket Number 50-245 A,

Reportable Occurrence R0-81-01/IP s

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Dear Mr. Grier:

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This letter is forwarded to provide proept notification of Reportable Occurrence R0-81-01/1P as required by the Hillstone Unit 1 Technical i

Speci fications.-

l On February 9,1981 at 1120 hours0.013 days <br />0.311 hours <br />0.00185 weeks <br />4.2616e-4 months <br />, Class I Inservice Inspection of Low Pressure Coolant Injection System (LPCI), subsystem B, revealed a flaw j

in a pipe weld between the primary containrent penetration and the Entme,r e is ola tion Check Valve.

The cause of f a i l u e-o is not known at the present time; an investigation is in progress.

Additional inforntion including the cause of failure and corrective I

action will be included in a 14 day follow-up report.

i Yours truly, fl0RTHEAST NUCLEAR ENERGY COMPANY

, J. Mroczka Station Superintendent Millstone Nuclear Power Station MJB/EJM: raw cc:

Director, Office of Managemnt Enforcement and Program Control.

Washington, D.C.

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Director, Office of Management Inforr:etion and Progran. Control, l

Hashington. D.C.

U.S. Nuclear Regulatory Cor: mission, c/o Document 11anagerent Branch, Washington. D.C.

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