05000366/LER-1980-153-03, /03L-0:on 801107,during Cold Shutdown,Test of Reactor Core Isolation Cooling Turbine Exhaust Isolation Valve 2ES1-F040 Revealed That Leakage Exceeded 10CFR50,App J Acceptance Criteria.Caused by Scratches on Valve Seat

/03L-0:on 801107,during Cold Shutdown,Test of Reactor Core Isolation Cooling Turbine Exhaust Isolation Valve 2ES1-F040 Revealed That Leakage Exceeded 10CFR50,App J Acceptance Criteria.Caused by Scratches on Valve Seat

ML19343B201
Person / Time
Site:	Hatch
Issue date:	12/05/1980
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19343B195	List: 05000366/LER-1980-153, Forwards LER 80-153/03L-0 05000366/LER-1980-153-03, /03L-0:on 801107,during Cold Shutdown,Test of Reactor Core Isolation Cooling Turbine Exhaust Isolation Valve 2ES1-F040 Revealed That Leakage Exceeded 10CFR50,App J Acceptance Criteria.Caused by Scratches on Valve Seat
References
LER-80-153-03L, LER-80-153-3L, NUDOCS 8012150195
Download: ML19343B201 (2)

LER-1980-153, /03L-0:on 801107,during Cold Shutdown,Test of Reactor Core Isolation Cooling Turbine Exhaust Isolation Valve 2ES1-F040 Revealed That Leakage Exceeded 10CFR50,App J Acceptance Criteria.Caused by Scratches on Valve Seat

Event date:
Report date:
3661980153R03 - NRC Website

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W EVE *4iDATE I4 7b PEPORT DAT E tia EVENT DESCRIPTION AND FROB ABLE CONSECUENCES h 1012110n 11-5-80. with Unit 2 in cold shutdown, an LLRT by procedur HNP 1 Io131 13952 was performed on the RCIC turbine exhaust isolation valve ?E51-F04RI 10111 10 n 11-7-80_3 when the LLRT coordinator reviewed the data it was deter-I lo151lained that the leakage exceeded 10CFR50 Appendix J acceptance criteria i

101c1Isection III.C.3 since the test volume could not be pressurized.

This ist lo l71 l a repeti tive occurrence - see LER _50-366/1980-152.

There were no ef-f lole l I fects on public health or safety due to this event.

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CAUSE

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i ithe seet of the valve which were probably caused by the valve closinc on!

11 l 21 I debri s.

The valve seat was polished to remove the scratches, and a suc-1 i a lcessful retest was performed by LLRT procedure HNP-2-3952 (as left leak-l i4 Iage = 300 accm).

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LER #:

50-366/1980-153 r

Licensee:

Ceorgia Power Company Facility Name:

Edwin I.

Hatch Docket #:

50-366

Narrative

Report for LER 50-366/1980-153 On 11-5-80, with Unit 2 in cold shutdown, a local leak rate test was performed per procedure HNP-2-3952,-

" Primary Containment Periodic Type B and Type C Leakage Tests", on the RCIC Lurbine exhaust isolation valve 2E51-F040.

On 11-7-80, the LLRT coordinator reviewed the LLRT in which the valve was found to be Icaking such that the test volume could not be pressurized.

Since the test volume could not be pressurized it must be assumed that the leakage exceeds the 30-day sealed water inventory acceptance criteria specified by

10CFR50, appendix J,

section III.C.3.

This is a repetitive occurrence see LER 50-366/1980-152.

There were no effects on public health or safety due to this event.

The Icakage of the RCIC turbine exhaust valve 2E51-F040 was due to scratches on the seat of the valve which were probably caused by the valve closing on debris.

The valve seat was polished to remove the scratches, and a retest was performed by LLRT procedure llNP-2-3952.

The retest leakage of 300 acem satisfied the acceptance criteria.

6