05000321/LER-1980-041-03, /03L-0:on 800425,observation of RHR a Loop Heat Exchange Pressure Indicator Indicated a Loop Pressure Was Increasing Above Normal Jockey Pump Charging Pressure. Caused by Leaking Isolation Valve

/03L-0:on 800425,observation of RHR a Loop Heat Exchange Pressure Indicator Indicated a Loop Pressure Was Increasing Above Normal Jockey Pump Charging Pressure. Caused by Leaking Isolation Valve

ML19323C622
Person / Time
Site:	Hatch
Issue date:	05/07/1980
From:	Baxley S GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19323C618	List: 05000321/LER-1980-041, Forwards LER 80-041/03L-0 05000321/LER-1980-041-03, /03L-0:on 800425,observation of RHR a Loop Heat Exchange Pressure Indicator Indicated a Loop Pressure Was Increasing Above Normal Jockey Pump Charging Pressure. Caused by Leaking Isolation Valve
References
LER-80-041-03L-01, LER-80-41-3L-1, NUDOCS 8005160400
Download: ML19323C622 (2)

LER-1980-041, /03L-0:on 800425,observation of RHR a Loop Heat Exchange Pressure Indicator Indicated a Loop Pressure Was Increasing Above Normal Jockey Pump Charging Pressure. Caused by Leaking Isolation Valve

Event date:
Report date:
3211980041R03 - NRC Website

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60 68 DOCKE T NUMBER 95 69 LVE N1 DATE 74 7b HL PORT DA10 60 EVENT orsCniprioN AND PROF 1AfsLE CONSEQUENCES h Io.121 l During steady s tate power operation, af ter Ell-F015A LPCI Inboard Isola i l tion Valve was operated open then reclosed per llNP-1-3162 RHR M.0.V.

I n 3 IT?TTl l exercise, licensed operator observed pressure increasing in the RHR "A" l

lnis;[ Loop.

A Similar event occurred on the RHR A Loop, R0 Report 850-321/

I jo_jc_ll79-012 and B Loop, R0 Report # 50-321/79-100.

There were no effects I

lupon public health or safety due to this event.

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40 41 42 43 44 47 CAUSC DEScalPTION AND CORHECTIVE ACTIONS h filol IThe Ell-F015A valve started leakina hv af ter cyclino tho valve fnr surv l 11111 I testing.

T he Ell-F017A, LPCI outboard isolation valvo was c i n e n ri n n ri l

i 2 1the pressuriz itj on of the " A" 1000 was ceased.

Pl ap t orocedures were l

Iiial l changed to allow this valve lineup.

The Ell-F015A valye will be re-l M ] Ipaired the next cold shutdown.

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Plant E.

I. Hatch May 7, 1980 LER #50-321/80-041

NARRATIVE

REPORT On April 25, 1980, with the unit at steady state power operation (98% of licensed thermal power), an observation of the RHR "A"

Loop Heat Exchange Pressure Indicator by a licensed operator in the control room indicated that the "A"

Loop pressure was increasing above normal jockey pump charging pressure of 60 PSIG.

Investigation showed that if the LPCI Outboard Injection Valye Ell-F017A was closed, then pressurization of the "A" Loop would cease.

Thus, the LPCI Containment Isolation Valve E11-F015A was determined-to be leaking.

This problem is a recurring one for this Loop; refer to R0 Report Number 50-321/79-012.

A similar event occurred on the RHR "B" Loop; refer to R0 Report Hum-ber 50-321/79-100.

Nothing has happened to indicate that this problem is applicable to the F015 Valves on the RHR

A" and "B" Loops on Unit 2; in fact, the valves are from a different manufacturer.

This decision was based upon power being available to op-erate both the Ell-F015A and F017A Valves in case of a LOCA and/or LOSP type accident.

There are no system problems be-cause of the configuration.

Primary containment integrity I

is maintained due to both valves being closed (with Ell-l F017A closed, the pressurizing ceased).

Repair of this valve will occur upon first cold shutdown.

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