ML20042A463

LER 82-003/03L-0:on 820212,reactor Water Cleanup Primary Containment Inboard Isolation Valve MO-2397 Became Inoperable While in Full Open Position.Caused by Normally Energized Relay Coil 16A-K36 Shorting.Relay Replaced

ML20042A463
Person / Time
Site:	Monticello
Issue date:	03/12/1982
From:	Meysembourg M NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20042A418	List: ML20042A417 ML20042A463
References
LER-82-003-03L, LER-82-3-3L, NUDOCS 8203230456
Download: ML20042A463 (1)

Text

.h 5 1982 NRC FORM 366 U. f.. NUCLEAR REGULATORY COMMISSION 17 77)

LICENSEE EVENT REPORT

, CONTROL BLOCK: l i

l l l l l lh o

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI lo lil8l9M I NLICENSEE 7 I M CODE l N l Pl 1l@l 0l 0l- l 0 LsCENSE 14 l 0 l tNLM8EHl 0 l 0] -l 0l 0l@l 4 l 1LICENSEl 1 l TYPE 1l 1l@l 'l jg lb 25 26 JO 57 LA T 58 CON'T loI'l 7 8

$, "CE l L @l 0l 5 l0 [ 0 l 0 l 2 l 6 l 3 gl0 l2 l1 l2 l 8 l 2'l@l0 l 3 l 1 l 2 l 8 l 2 l@

t,0 61 00Cs(E T NUV8ER 68 69 EVENT DATE 74 75 REPORT DATE 83 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I lo l2] l During normal operation, the Reactor Water Cleanup Primary Containment Inboard g Iol3l l Isolation Valve, MO-2397, became inoperable while in the full open position. The l l o 14 l l RWCU system was isolated by closing MO-2398 and MO-2399, per Technical Specifica- l 1

l o i s i l tions 3. 7.D. 2. There are two similar occurrences, M-RO-78-05 and M-RO-75-05.  ;

lo16llNo effect on public health and safety. l l0l7ll l 191s] I l 7 8 9 80 SYSitM CAUSE CAUSE COYP. VALyg CCDE CODE SU8 CODE COYPONENT CODE SUBCODE SUB CDE jol9l 7 8 lC lG l@ ]@ l A lg l R l Ej L j Aj Y[ Xlg 9 10 11 12 13 18 19 g 20 g

_ SE QUE NTI A L OCCURRENCE REPORT REVISION LER RO EVENT YEAR REPORT NO. CODE TYPE NO.

@ ,agg I8I21 1-1 1010l31 1/l 10 13 l l Ll l-l l 01

_ 21 22 2J 24 26 27 28 29 30 31 32 TAKE A CN OJPLANT TH HOURS S B IT FOR? 8. S PPLIE MAN FACTURER lCl@lZl@

3J 34 l Zl@

35 l36Z l@ l0l0l0l0l 31 40 lN lg di lY lg ]g 42 lC l0l8[0lg 43 44 4p CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I i l 0 l l The nt rmally enernized relay coil 16A-K36 (GE-CR120 A 04002 AA) shorted , causing l

[i j i j [ control power fuse to blow, resulting in loss of control power to valve MO-2397. ,

t g [ MO-2397 failed in the full open position. Relay 16A-K36 was replaced. Valve ,

lil3l l MO-2397 was again operable 3 1/2 hours later, g 11 12 Il I 7 8 9 80 STA $  % POV.E R OT"8 rt STATUS ISCO RY OtSCOVERY CESCRIPTION l1 is l l El@ l 0 l 9 l 8l@l NA l l Al@l ALARM l ACflVtTY CON TE NT nELEASED OF RE LE ASE AVOUNT OF ACTIVITY LOCATION OF RELE ASE li l618 9d @ (_Zj @ l NA I I NA l

1. 10 11 44 45 PEHSONNEL EXPOSbnES 60 NU'.'B E n TYPE Of SCRIPTIO'J d Ii I 7 I i 01 01 Oj@l Z l@l NA l

,E mONNE L ,u15 So No nen oESCniPriONh I i I =8 19 1 01 01 Ol@l NA 7 11 1;l l

LOSS Of OR D AU AGE TO F ACILITY 80 TYPE DESCNPTION Ii I"I4LzJ@l 7 9 NA 10 I 80 12 i n t isSU[hih i v o

n'""llCn @.T,0 N R C USE ON L Y ,

8203230456 820312 l

,, g ltlllllillll',,l :i DR ADOCK 05000 p Monica Meysembourg p gyg (612) 295-5151

.