ML19341A255

LER 80-031/03L-0:on 801218,reactor Core Isolation Cooling Inboard Steam Supply Isolation Valve Did Not Automatically Close.Caused by Valve Closing Torque Switch on Type Smb Limitorque Operator for Valve MO3-13-15 Being Open

ML19341A255
Person / Time
Site:	Peach Bottom
Issue date:	01/13/1981
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-80-031-03L, LER-80-31-3L, NUDOCS 8101220468
Download: ML19341A255 (1)

Text

Mr. Boyc 2 H. Gri:r, Dir:ctor No. -**

3-80-31/3L Of fice of Inspectie- & Enforcement, Region 1 U.S. Nuclear Regulatory Cormiission ._ _ _. _ _ _ - - _ - - _

p King of Prussia, PA 19406

Dear Mr. Grier:

2 ThigiLER ccacems failure of a RCIC steam supply isolation valve to close Mhen recaired chiring shutdown. Governir.g Technical Specification is 3 5.D.C ,. n U

. ~ . - . . . - .~.

, U. S. NUCLE AR REGULATORY CoMM;$5loN

]

. LICENSEE EVENT REPORT CONTROL BLOCK- l l l l l .l th i

(PLE ASE PRIN* M TYPE ALL REQUIRED INFORMATION)

' t il= IP . IA uCim l P Coo. l B l S l 3 (@i. .. 0 (0 l- l0 uw.s (n lo '. .D. I- IO le l@

. 2, . 4l1 l1 lI ,l1]@l

,,C.,,,,i,,, , , , , , I (Q

ON'T E 8 s"l' , "C LLJ@lo I 5 lo I- lo 1217 It RLi 2 i 1 st 6'J 1818 i o l@l o l i REPuht kVENT DATE 14 7b l 113Dr ' ir bu 61 DOCKET esvMBE R EVENT DESCRIPTIO*. AND PROS A8LE CONSEQUENCES h ol2l l During shutdown of the unit, the operator observed t%t the ROIC inboard _ _

v ,3 i i steam supply isolation valve did not automatically ciose as required. I o64i I Applicable Tech Spec is 3.5.D.1. 'PA outboard steam surely valve closed I o i t, j l automatically as required. Tne valves nomally automatically close when I

,cil main steam pressure decreases below 105 PSIG. The low pressure isclation I 9Tl l logic was totally operable. I 0 18 ] l I es 6'

'coEs" o"o'a' C sus'C$os courouwTcoes su'sSIcs sNEUs a191 l C l E lh [E,jh Wh l V l A l L l V l o f P l@ [IJ@ [z_J @

9 S 10 11 14 IJ 18 le 2s sf ou8 NTI AL OCCUR at NCE RE Fo8tt Revision

_EVENTvEAR REPORT NO. CooE TYPE No.

@ ,'tE R ROjg" [--J lo 1311 l (gj lo I3 i LL_j [--j [o,j

_l2'8lol 22 u u a 2> u n as as v TA E* A YO ON PL A T U T U HOUR $ 5 n. TT D F ts su et M4 Y eip LcJ@LzJ@ Llj@

33 34 3b Lz_J@

M 3 lo Io Io Io I LnJ@ LY.J@

40 45 i>_J @ l tl 21 o! ol@ g

4) 43 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS iioil The valve closing torque switch on the type SMB Limiteraue operater I i li1 i for valve Mo3-13-15 was found open. The switch was'rerlaced. I i>il Valve operation and response to an isolation signal were satisfactorily I

,1il l tested and the valve was returned to service en December 19, 1960. I aiaJ ls z.

I as sTA 5 trowfR OTMERSTATUs SCO Rf DiStovf RV DESCRIPT'oN 3] [D,J@ l 0i ol 0l@l N/A l [A_,JQl _ operator observation l

' AITmTv ccTTv T Reta Asso oe Rat Asr Lo: ATioN on Rata Ass @

t i6 l W @ lz_j @ l AvovmTor N/A ACTmTv l @N/Al l

. Rso d1 n,osMis "

esvwef R Tvet DE sCR4PTeoN -

i I il' l o l o lo l@Lz_l@l

N/A I

' . Rsosul' uo'Its

-.i R oisCR .T.oN@ l2lM ll

. 1,, lo I o lo l@l ,, i2 N/A ImRht s, i

Loth 08 Ost DAWACE 10 7ACaufv TYPE DESCRa#110a i

I 9. l 1,z.J@lio N/A l e

,ssf*" * "' N L W LN_ @ l L'LR.,7,o @ N/A 7* I I IIIIfIIffI !1 l*

• ia 520222e g f // *^ V71~

" '" " ~

S ~^~ ' - - -o* ' ' ' " ""  ;