05000313/LER-1980-016-03, /03X-1:on 800611,during Hydrogen Purge Sys Surveillance Testing of Loop B,Proper Flow Through Sys Was Unobtainable.Caused by Lodging of Rust Scale in Hydrogen Check Valves HPA-4,HPA-10 & HPA-128.Valves Cleaned

/03X-1:on 800611,during Hydrogen Purge Sys Surveillance Testing of Loop B,Proper Flow Through Sys Was Unobtainable.Caused by Lodging of Rust Scale in Hydrogen Check Valves HPA-4,HPA-10 & HPA-128.Valves Cleaned

ML19338F200
Person / Time
Site:	Arkansas Nuclear
Issue date:	08/27/1980
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19338F195	List:
References
LER-80-016-03X, LER-80-16-3X, NUDOCS 8010070625
Download: ML19338F200 (1)

LER-1980-016, /03X-1:on 800611,during Hydrogen Purge Sys Surveillance Testing of Loop B,Proper Flow Through Sys Was Unobtainable.Caused by Lodging of Rust Scale in Hydrogen Check Valves HPA-4,HPA-10 & HPA-128.Valves Cleaned

Event date:
Report date:
3131980016R03 - NRC Website

text

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g Update Report - Previous Report Date 7/10/80 NRC POR84 See U. S. NUCLE AR REGULATORY CC-^

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LICENSEE EVENT REPORT EXHIBIT A CONTROL 8 LOCK: l l l I l l 1h (PLEASE PRINT OR TYPE ALL REQUIRED INPOma4ATIONI

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[ VENT CESCRIPTION AND PROBAGLE CONSEQUENCES h ITTil I Durina hydrocen ourae system surveillance testii:a of Looo B oer operatinal o

i procedure 1104.33 Supplement II, proper flow through the system was un-,

i able ^o be obtained. Hydrogen purge Loop A was verified operable per thei o.

gi last surveillance test.

i o e i There have been no similar occurrences.

I o, i Reportable per T.S.6.12.3.2.(b).

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40 46 og 43 es og CAUSE DESCRePflON ANO CORRECrlVE ACTIONS m i Cause of flow degradation was determined to be due to rust scale being i

,, i lodged in the following hydrogen purge check valves: HPA-4, HPA-10, HPA,

,, i 128. Valves were cleaned.

Source of moisture identified as Service i Water leakinq by seals on idle ventilation fans, VSF30A/B, VSF37A/B.

, 3 i Service Water Solenoid Valves added, linked to fan operation.

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