ML19290F016

Supplemental LER 80-001/03L-1:on 800108,while Performing Sblc Relief Valve Setpoint Check,Relief Valves Rv 1105A & Rv 1105B Actuated Above Tech Spec Limit.Caused by Relief Valve Setpoint Drift.Valves Removed,Inspected & Rebuilt

ML19290F016
Person / Time
Site:	Quad Cities
Issue date:	02/25/1980
From:	Vahrenwald J COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19290F012	List: ML19290F011 ML19290F016
References
LER-80-001-03L, LER-80-1-3L, NUDOCS 8003170457
Download: ML19290F016 (1)

Text

NRC FORM 366 .

UCENSEE EVENT REPORT O E T DATE 2-7-80 CONTROL BLOCK: l 1

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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LICENSE TYPE Jo 7 UCENSEE CODE 14 15 CON'T 7

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74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 l While performing SBLC Relief Valve Setooint Check. Orocedure 00S 1100-4 ralief valvel gl RV 1105A actuated at 1600 psig and relief valv:: RV 11058 actuated at 1500 psio. The l o 4 l Technical Specification 4.4.A.2 limit for SBLC relief valves is 1400-1490 osia. The I o s I increased setpoints of the relief' valves were still within the design pressure ratingt gg of the SBLC piping. Subsequently the SBLC system was operable and would have 1 0 7 l performed had the need arose. l I

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11 12 , 18 t9 SEOVENTTAL OCCURRENCE REPORT REVISION EVENT YE AR R EPORT NO. CODE TYPE NO.

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 i O The cause is attributed to relief valve setpoint dri-t. Both valves were removed. I g[ inspected, and rebuilt. The valves were retested in the system usina orocedure  !

, 2 I QOS 1100-4. The RV 1105A valve corrected relief point was 1490 psig and the RV 1105B1 g,i3l l valve corrected relief point was 1450 psig. l i 4 l

I 80 7 8 9 ST S  % POWER OTHER STATUS 05 V RY DISCOVERY DESCRIPTION Surveiilance Testing i s ]g l0 l0 l0 jgl NA l W gl l ACTIVITY CO TENT AELE SED OF RE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 7

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