ML19207B972

LER 79-037/01X-0:on 790828,during Surveillance Test,Valve SI-4145-MOV Was Open & SI-4143-MOV Was Shut,Causing ECCS Subsys & Containment Spray Sys to Become Inoperable.Caused by Personnel Error

ML19207B972
Person / Time
Site:	Calvert Cliffs
Issue date:	08/28/1979
From:	Davis S BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-79-031-01X-02, LER-79-31-1X-2, NUDOCS 7909060259
Download: ML19207B972 (1)

Text

G 77)

LICENSEE EVENT REPORT CONTROL BLOCC l l l l -l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 3 6 lo t i 5 9

• lDIClCINll @l010l 101010lo10I la10l@l4IlIlllIll@l L.CENSEE CODE 44 iS LICENSE Nou6E A 25 2t> oCENSE TYPE JO I

57 CATbd l@

CcvT cli $ l L gl 0 [ 5 [ 0 l 0 l0 l 3 11 l7 l@l 68 0 6918 12 18 l 7 19 l@ 750 18REPORT E V E NT D ATE 74 l2 l 8 17 1980l@

DATE E 60 61 DOCKET NUMBER EVENT DESCRIPTION AND PRCB ABLE CONSECuENCES h o . :1 1 At 0600 durino nerfomance nf a curvaillanc, test, the operator discovered I oi3  ; that SI-4145-MOV. (12 Header Containment Sumo Valve) was ooen and SI-4143-TV I

,1 ,, l(12 Header UT Suction valve) was shut, causing or.a ECCS subsystem and one 1 at3 i containment soray syster to become inocerable (T.S.3.5.2 and 3.6.2.1) . The I Of6 l Operator ifTiediately reDCsitioned the valves to their DroDer Dosition. The I _

joi7; ] redundant contain. scray and ECCS systems remained ocerable durine the event. I a -i iThis is not a- rettetitive occurrence. j

. SO 3 3 SYSTE\1 CAUSE CA USE COM". VALVE CODE CCOE SUSCOGE COMPON ENT CODE SeeCODE SUBCODE

' lej E

l5 lF l@ lAt? @ lA l@ I V I A l L l V I E l X I@ lE l@ l DI @

9_ to 12 13 18 19 20 CE QUE NTI A L OCCURAENCE REPORT D E VISION g a.; O EVE NT VEAR R EPORT NG CODE TYPE NO.

@ 4ecar l7j9l l_[ l0l3[7l l/l l0 il Xl l-l 0i

1  ;; 23 24 26 27 28 29 30 31 32 AC*lON EUTURE EFFECT SH UTOOWN ATTACNufNT NPAD4 PRIME COMP. COMPONENT TAKEN ACT I ' N ONP'JNT YETdOO HOORS SUBulvTED FORM ws. SUPPLI E R MANUFACnRER lX 32 lgl54)flg l5L 3

lg l3 Zlg 0

[0 10l0 2' 40

[ g g 43 lNlg 42 lZl@ lVl0l8l5lg 43 44 47 CAuSE DESCR!FTION AND CC ARECTivE ACTIONS i , , , i 10n 8-27-79, the Control Room Goerator inadvertently shut SI-41a3 u0V while 1

!i i ereturnina the ECCS sustem to nomal follewine surveillance testim n# RI alac- I

, , (A0V. The immediate corrective action was to shut SI-4145-W'V and oren SI 4143- 1

,,i 240V. Further corrective action will be included in the follow-un recort. I ta i I a a ao A JS ~  % POWER CTHE R STATUS De R .

DISCOVERY DESCRWTION NA Operator Observation

- ie 8 9 lD l@ l 0 l 0 l 0.12l@[13 to 44 l lBl@l 45 46 80

[

ACTIVITY CONTENT AMOUNT CF ACTIVITY " LOCATION OF PELEASE mELEASEO OF RE LE ASE 16 i lZl @ lZlgl :O NA 44 l

85 NA JO l

7 3 3 T1 PED $CNNE L E X POSUA E$

nun > BEE Tv9E OESCRi'TICN l'l'l 7 8 9 1: '

13 80 PED 5 CNNE L ,NJ. PIES g ,, ,),,g NUMBEA D E LCN'9 C N N , g ,, g g, j , \ 4

\\ eOv/

7 ic!lZlZ12l@l 9 9 11 12 u

k **

i

.;t: :s C A Mr.tAGE TG FACALsTV (g} . '

• O I) }. _P-j {. / k T YP E OECCRIPTION V g 5 8 Y i I) \

1 i'l(2l@l -

_0 h l O Ng

[ _ \

P, BEL O TY N.r gg 3Ntv GESCR tPT4ON 2l IS$tE D,k ~ ~ v i i ' ' ,

i g ? in 3 63 SO -

NAMr ' ' ones a 7r

• 3 02((