ML19337B561

LER 80-033/03L-0:on 800828,during Routine Surveillance Testing,Drywell Supply Inboard Isolation Valve PC-232MV Failed in mid-position.Caused by Broken Operator Contact Cam.Cam Replaced.Damaged Cam Returned to Limitorque

ML19337B561
Person / Time
Site:	Cooper
Issue date:	09/08/1980
From:	Converse W NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19337B559	List: ML19337B557 ML19337B561
References
LER-80-033-03L, LER-80-33-3L, NUDOCS 8010070298
Download: ML19337B561 (1)

Text

D

[% .

N AC FofM 366 U.S. NUCLEAR REGULATORY CoMMISSloN (7-77)

UCENSEE EVENT REPORT CONTROL BLOCK: l 1

l l l l l lh 6

(PLEASE PRINT oR TYPE ALL REQUIRED INFoRMATloN) fR IN 7 8 9 l E lLICENSEE C l PCOC'E l R l 1 l@l 0 l 0 l- l0LICENSE 14 f5 l0 i O  ! O i - 10 l O25 l 0 l@l4 NUMBER 26 l1 l1IlIll@l$7 GAT LICENSE TYPE JO l

68 l@

CON'T

" 7 IOI1I 5$"C 60 l L l@l0 l5 l0OOCKET 10 l0NUMBER l2 l 9 l 8 68l@l690 l 8EVENT l 2 OATE l 8 l 8l 0l@l019 REPORT l 0 l 8DATEl 8 l 080l@

1. 8 61 14 75 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 1012 l puring routine surveillance testing, PC-232MV, drywell supply inboard isolation valvg iO i3i failed in mid-position. This event is repetitive (ref. LER 79-39). The outboard l l c, i ., i [ solation valve was operable so that containment isolation could be attained. In l loisl pddition, PC-232MV can be manually positioned. There were no adverse effects on l l o is I bublic health and safety. I 10171 l 1 10181l  !

8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCODE COMPONENT COOE SUSCODE SUSCODE

[.0, l.2.]

8 l SlD l@ [E_j@ l X l@ lV l A l L l V l 0 l P l@ l X l@ W @

F 9 10 11 32 IJ 1H 1 +J 20

_ SE QUENTI AL OCCURRENCE REPORT REVISION LER AO EVEN T YE4R REPOR T NO. CODE TYPE NO.

@ ,R EQR' 1810l 28 22 l-l 2J l Of 3l 3 l 24 26 y 10l3l lLl [ _J l0 l 27 28 29 30 31 32 TAKEN AC ON ON PLANT YET HOURS S8 ITT FOR 68. SU 1 R MANLFACTURFR lJJA l@[J,j@J4

[., Zj@

35 lZlh 36 101010l0l JI 40 W@

43

[_j@ lN l@ lLl2l0l0l@

42 43 44 47 CAUSE oESCRIPTION AND CORRECTIVE ACTIONS I i i o I trhe operator for PC-232MV is a Limitoraue SMB-00. The operator contact cam was foundl 11 Iii roken where it was pinned to the drive shaft. The cam was replaced with an ident- 1 m lical part. The damaged cam has been returned to Limitorque for analysis. This is l L' 11] lan interim report; an updated report will be issued when the analysis is complete. I LLL*]I 7 8 9 I

80 STA 5  % POWE R OTHER S TA TUS OlSCO RV OISCOVERY DESCRIPTION IiI5I [ Ej @ l' nI ol ol@l NA l [1]@l* Operator Observation l AJTivif. CO# TENT RELEASED OF RELE ASE LOCATION OF RELEASE

[TTs'l P 8 9 U @ W@l 10 WOUNT NA OF ACTIVITY 44 l

45

@l NA l 11 80 PERSONNFL FxPCsuRES NUP 88E R TYPE DESCRIPTION l i l i j l 0l 0 l 0 l@g@l NA l

PERSO~NE L iNJu'4ES Nuc, E R DE ScR,,TiO~ @

NA L' L.J l01010 l@l 1 M ** iI 17 l

80 L OM OF OH DAMAGE TO F ACillTV TYPE DE SC HIP TION i 9 (,,Z_J@l NA l r M 't to 80 NHC USF. ONW 2 o rc.o((l@lntsunPruiN@

[3 to MA l 68 69 IIIlIlllIIlllg1 80 3 N PREPARER W. E. Converse PHONE:

$