05000366/LER-1981-014-03, /03L-0:on 810318,during Testing,Standby Liquid Control Discharge Relief Valve B Failed to Operate at 1400 Psig.Caused by Setpoint Drift.Valve Reset & Returned to Svc

/03L-0:on 810318,during Testing,Standby Liquid Control Discharge Relief Valve B Failed to Operate at 1400 Psig.Caused by Setpoint Drift.Valve Reset & Returned to Svc

ML19347D988
Person / Time
Site:	Hatch
Issue date:	04/07/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19347D985	List: 05000366/LER-1981-014, Forwards LER 81-014/03L-0 05000366/LER-1981-014-03, /03L-0:on 810318,during Testing,Standby Liquid Control Discharge Relief Valve B Failed to Operate at 1400 Psig.Caused by Setpoint Drift.Valve Reset & Returned to Svc
References
LER-81-014-03L, LER-81-14-3L, NUDOCS 8104140581
Download: ML19347D988 (2)

LER-1981-014, /03L-0:on 810318,during Testing,Standby Liquid Control Discharge Relief Valve B Failed to Operate at 1400 Psig.Caused by Setpoint Drift.Valve Reset & Returned to Svc

Event date:
Report date:
3661981014R03 - NRC Website

text

m f

U.S. NUCLEAR REGULATORY CoMMISSloN

(

LICENSEE EVENT REPORT y;

,I CONTROL BLOCK: l l

l l

l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) t 6

lo l t l l G l A l E lI lH l 2 l@l0 l0 l-10 l0 l0 l010 l-l0 l0 l@l 4l ll 1l 1l ll@l l

l@

7 8 9 LICENSEE CODE 14 lb LICENSE NUMBER 2s 26 LICENSE TYPE JU b7 LAI $8 con'T E

l O l t 1 3g"c l L l@l 0 l 5 l 0 l 0 l0 l 316 l6 l@l 01 31 1l 81 8l 11@l 0 l 4 l 0 l 7 l 8 l 1 l@

?

8 60 61 6 DOCKET NUMBER 63 69 EVENT DATE 74 75 REPORT DATE S0 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10121l During normal operation while performing the Standb_y Liquid Control (SBLC)

I 10131l Pump Operability and Relief Valve Test Procedure, HNP-2-3702, the SBLC l

1014 l l "B" Discharge Relief Valve, 2C41-F029B, failed to operate at 1400 psig.

l IO isi l The acceptable range is 1350 150 psig per Tech Specs 3.1.5. The redundant l

lO is l l loop "A" was operable. This is a non-repetitive event. There was no l

l O 17 l l effect on safe plant operations nor was there any effect on public l

lOlRi i health and safety due to this event.

I 7

8 9 80 C DE CODE SUBCO E COMPONENT CODE SU8C DE SU O E lS lHj@ M@ 18 l@ l VI Al Ll VI El Xl@ l P l@ lB l@

O 9 7

8 3

10 13 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LER EVENT YE AR FIEPORT NO.

CCOE TYPE NO.

@yug/RO l 8l 1l l-l l 011l 4l l/l lOl3l 9

l-l l0l at 21 22 23 24 26 27 28 29 30 31 32 AKEN'AC ON PL NT 4ET HOURS S8 IT O FOR1 UB.

SU PL1 MAN FAC URER LE_j@lFl@

[._.Zj@

lZ l@

l 01 0l 01 Ol l Yl@

l N l@

l N l@

lLl2l6l3l@

33 34 35 36 3/

40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS lilOll The cause of the event was setpoint drift on SBLC "B" relief valve, 2C41-I li lil l F029B.

The valve was reset to 1350 psia per SBLC Pump Operability and I

ii,7i l Relief Valve Test Procedure, HNP-2-3702.

The system was retested l

lil3ll satisfactorily and returned to service.

[

li i41 l l

'sT2SS

% POWER OTHER STATUS ISC RY DISCOVERY DESCRIPTION l i l 5 l [,E,,_J@ l 0l 6l 0l@l NA l

U @l Operator observation l

ACTIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE lZl@lZl@l NA l

l NA l

i s PERSONNEL EXPOS' ES NUVBER TYPE

DESCRIPTION

11 l 71 l 0 l 0 l 0 l@l Z l@l NA l

PERSONNEL INJURIES NUYBER

DESCRIPTION

l0l0l0l@l NA l

i -

7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE

DESCRIPTION

18191lZl@l NA l

7 8 9 10 60 ISSUEf@ DESCRIPTION e

IN l

.A l

lllllll111Ill]

2 o

'8 1"0"4 1 M g l4,,nsn R. T. Nix, Supt. of naint.

,g o,,s yOEm

~ "{

r LER No.: 50-366/1981-018.

i' Licensee: Georgia Power Company Facility: Edwin I. Hatch Docket No. : 50-365

Narrative

Report for LER 50-366/1981-018.

During normal operation while performing the Standby Liquid Control (SBLC)

Pump Operability and Discharge Relief Valve Test, HNP-2-3702, the "B" SDLC Relief Valve, 2C41-F0293, failed to operate at a pump discharge pressure of 1400 psig.

The acceptable range is 1350 !50 psig per Tech Specs 3.1.5.

The redundant "A" loop was operable.

This is a non-repetitive event for this unit.

Safe plant operation"was not affected by this incident.

There was no effect on public health and safety due to this event.

The cause of the event was setpoint drift on the "B" SBLC Discharge Relief Val ve, 2C41-F0298.

The valve was reset to 1350 psig per SBLC Pump Operability and Relief Valve Test Procedure, HNP-2-3702.

The system was found satisfactory and returned to service.

The generic review revealed no inherent problems except that of setpoint drift. Work is continuing toward the reduction of the drift problem.

t

. In