05000321/LER-1981-023-03, /03L-0:on 810319,reactor Core Isolation Cooling Turbine Exhaust Valve E51-F001 Was Determined to Be Leaking. Cause Unknown.Investigation Underway

/03L-0:on 810319,reactor Core Isolation Cooling Turbine Exhaust Valve E51-F001 Was Determined to Be Leaking. Cause Unknown.Investigation Underway

ML19350D468
Person / Time
Site:	Hatch
Issue date:	04/09/1981
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19350D467	List: 05000321/LER-1981-023, Forwards LER 81-023/03L-0 05000321/LER-1981-023-03, /03L-0:on 810319,reactor Core Isolation Cooling Turbine Exhaust Valve E51-F001 Was Determined to Be Leaking. Cause Unknown.Investigation Underway
References
LER-81-023-03L, LER-81-23-3L, NUDOCS 8104150521
Download: ML19350D468 (2)

LER-1981-023, /03L-0:on 810319,reactor Core Isolation Cooling Turbine Exhaust Valve E51-F001 Was Determined to Be Leaking. Cause Unknown.Investigation Underway

Event date:
Report date:
3211981023R03 - NRC Website

text

-

NRC FORT.i 3 W U. S. NUCLEAR REGUL A1oRY COf.iMISSION (777)

LICENSEE EVENT REPORT CON Trol block: l l

l l

l l

IPLEASE PRINT OR TYPE ALL REQUIRED INFoRMATioN)

.lo lil 1 Gl Al E l I I HI 1_l@l 0101 - 101 O l 010101 - 10 l 01@l 4111111 l I l@l l

l@

7 8 9 LICENSEE CODE 14 IS LtCEwc *su'.t*JEH

.:S 2t, LICEft4E TYPE JJ b7 LAT Sd CON'T

%.0 LLj@l0 1510101013121.11@l o l 3111918 l l ]@l 01410l 918 ] I l@

O i 7

5 60 bl DOCKET NUMSER tid M

EVENT DATE 74 Ib REPOHT DATE WJ EVENT DESCRIPTION AND pro 0ABLE CONSEQUENCES h 10n 3-18-81, wi th the Uni t 1 shutdown for a refueling / torus modification i O 2 Io lai t outage, LLRT of the RCIC turbine exhaust valve E51-F001 was performed.

I loI4110n 3-19-81, the LLRT coordinator reviewed the data sheet, and it was i

101s1Idetermined that the valve was. leaking (would not pressurize) such that I

o c lit would cause the.60 La allowable limit per Tech Specs 4.7.A.2.G to bel 10171 t exceeded.

This is a repetitive occurrence - refer to LER 50-321/1981

• l 0 e 1022.

There were no effects on public health or safety.

I e0 DE CODE SUBC E COMPONEN T CODE SUBC O'E SU ODE 10191 I cl EJ O LE_j@ [ X_j @ I V l A I L IV l E l X l@ Lc_J@ LoJ @

7 8

9 10 13 12 13 13 19 20 SEQUE NTI AL OCCURRfNCE REPORT R EVISION

_ EVENT YE A H REPORT NO.

CODE TYPE No.

O,=LER/ROl 811 l L_]

10 la i 3 I L<_]

10 13 i LL_]

l-l Lo_]

21 22 23 24 26 27 23 29 30 Ji 32 TK ACT ?

ON PL NT TE HOURS 72 SB ITT D For tb B.

S PP 1 MAN FACTURER LYJ@l_)Ll@

LZ_j@

LZ_j@

10101010l [1_j @

l Hl@

LA_j@

IPl31110l@

JJ 34 3b 3ti 31 40 43 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h lilOlIThe cause of the valve leaking is unknown at the cresent time: an inves-l i i ltination is underway.

The valve will be renaired and successfully re-I li i 21 I tes ted prior to startup following the nutage.

An update report will be I lsubmitted.

I i a li 121 I l

7 8 9 80 SA $

• ePOWER OTHEn STATUS ISCO RY DISCOVERY DESCRIPTION Ii I5 I [Gj@ l0 l 01 d@l NA I

LB_J@lPerformedLLRT I

A!nviTY CO0 TENT

• s e

80 li lG I LZJ @ L1J@l AMOUNT OF ACTIVITY @ l LOCADON OF RELEASE @

nEtEAr,to cF RELE ASE NA l

NA I

Et E xPosMES PE Rsev:

NU*.10E R TYPE DE SCFDPTION li l 71101010 l@LZJ@l nA I

PEH%0%E L INJul 165 N.."'H '1 DE *.LH s P T ION lil'l101010l@l NA l

1 a 9 ti t.'

60

'?%"' 'A"5%'" '""' @

Lz_J@l na l

i -

)

d

)

10 Jt)

F.q n..Cile P 1 t ON F. % L dng81 NA l

lllllllIlll1l' io j

t.,,

m, Y7"7/PS

?

"-M_

1 a _ _ _ _

._ bRL 1b bOL 79b_ m sc

LER f:

50-321/1981-023 Licensce:

Georgia Power Company Facility Name:

Edwin I. Ilatch Docket #:

50-321

Narrative

Report for LER 50-321/1981-023 On 3-18-81, with Unit 1 shutdown for a refueling / torus modif-ication outage, local leak rate tests of the RCIC turbinc exhaust valve E51-F001 was performed per procedure llNP-1-3952 (Primary Containment Periodic Type B

and Type C

Leakage Tests).

On 3-19-81, the LLRT coordinator reviewed the data sheets, and it was determined that the valve was leaking (as-found; would not pressurize) such that it would cause the.60 La overall leakage limit per Tech Specs 4.7.A.2.G to be exceeded.

This is a

repetitive occurrence refer to LER 50-321/1981-022.

There were no effects on public health or safety.

The cause of the valves leaking is unknown at the present time; an investigation is underway.

The valve will be repaired and successfully retested prior to startup following the outage.

An update report will be submitted.