05000321/LER-1981-016-03, During Review of Data Sheets for Refueling/Torus Mod Outage Determined That Valves Were Leaking.Caused by Debris &/Or Dirt on Valve Seats. Valves Lapped & Reseated & Successfully Retested

During Review of Data Sheets for Refueling/Torus Mod Outage Determined That Valves Were Leaking.Caused by Debris &/Or Dirt on Valve Seats. Valves Lapped & Reseated & Successfully Retested

ML20010G320
Person / Time
Site:	Hatch
Issue date:	09/03/1981
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010G310	List:
References
LER-81-016-03X, LER-81-16-3X, NUDOCS 8109150586
Download: ML20010G320 (2)

LER-1981-016, During Review of Data Sheets for Refueling/Torus Mod Outage Determined That Valves Were Leaking.Caused by Debris &/Or Dirt on Valve Seats. Valves Lapped & Reseated & Successfully Retested

Event date:
Report date:
3211981016R03 - NRC Website

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' idRC FORM D6 U. S. NUCLE AR REGULATORY COMMISSION (7-77 ).

LICENSEE EVENT REPORT Update Report Previous Report 1bte 3-26-81 CONTROL tiLOCK: l l

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60 61 DOCKET NUMBER t4 69 EVENT DATE 74

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EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h lo 121 I On 3-4-81. with Unit 1 shutdown for a refueling / torus modifiention nii t - 1 i

i O ta j l age, LLRTs of inboard MSIVs BM-F02?A. B. And C were performed.

On 3-1 loI.si L6-81, the data sheets were reviewed by the LLRT coordinator. and it was l' i

10151 1 determined that the valves were leaking in excess of the 11.5 scfh per I

r i l o 16 I i valve limit of Tech Specs 4. 7. A. 2.h (test volume would not nressurize). 1

• Io 121 1 This is a repetitive occurrence - refer to LER 50-366/1981-001.

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i o n i I were no effects on public health or safety due to this event.

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33 34 35 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h L'_l.o_j l Inspection of the valves showed that some debris and/or dirt had collectf litiiled on the valves' seats.

The valves were lapped and reseated and then I

liii2i lsuccessfu11y retested prior to startup.(as left leakages of 4.9 scfh). I llii3i l The unit is now in full compliance with the requirements of Tech Soecs I

ii pil4.7.A.2.h and no further reporting is required.

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LER #:

50-321/198. J16, R1 Licensee:

Georgia Power Company Facility Name:

Edwin I. Hatch Docket #:

50-321 1

Narrative

Report for LER 50-321/1981-0,16, R1 On 3-4-81, with Unit I shutdown for a refueling / torus modific-ation outage, LLRTs of inboard main steam i solation valves B21-F022A, B,

and C were performed per procedure HNP-1-3952, " Primary Containment Periodic Type B - and Type C Leakage Tests".

On 3-6-81, the LLRT i

coordinator reviewed the data sheets, and it was determined that the 1

valves were leaking in excess of the 11.5 scfh per valve limit of Tech Specs 4.7. A.2. h (test volumes would not pressurize).

This is a i

repetitive occurrence - refer to LER 50-366/1981-001.

There were no effects on public health or safety.

An investigation conducted to determine the

cause

of the valves leaking showed that some debris had collected on the valve's seats.

The valves were lapped and reseated and then successfully retested-prior to startup (as left leakage of less than'4 scfh for B21-F022A; 4 scfh for B21-F022B; and 4.9 scfh for B21-F022C).

The unit is now in. full compliance with the requirements of Tech Specs 4.7. A.2.h and no further reporting is required.

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