ML20050B053

Updated LER 81-001/03X-1:on 810126,while Performing Surveillance Test Mo 2035,HPCI Outboard Steam Supply Isolation Valve Failed to Close.Caused by Opened Limitorque SMB-O,240-volt Dc & Torque Switches.Switches Replaced

ML20050B053
Person / Time
Site:	Monticello
Issue date:	03/23/1982
From:	Wojchouski A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20050B039	List: ML20050B038 ML20050B053
References
LER-81-001-03X, LER-81-1-3X, NUDOCS 8204020537
Download: ML20050B053 (1)

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• NRC FORM 366 U,5.. fiUCLEAR REGULATORY COMMISSION (7 771 Update Report - Previous Repor* and Date: 02-25-81

. LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l l (PLEASE PRINT OR TYPE ALL REOUIRED INFORMATION) 1 O l0 l1 l l M l N l M l N l Pl 1l@l0 l0 l- l 0 l 0 l 0 l 0 l 0 l -l 0l 0l@l 4 l 1 l 1 l 1l 1l@j 'l lg i 8 9 LICENSEE CODE '4 15 uCENSE NUMBEH 25 26 LICEN5E TYPE JO 5 7 L A I 58 CON'T Lo_LLJ 7 8 JR% IbuL l@l68 01 51OOCKET 01 01 012161368 Glo NUMBE R 69 11EVENT 12 DATE 161811'l@l 01312 14 75 l 3 I_81 80 HEPOHT DAT E 2l@

EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h 10121 l During normal power operation, while perf orming surveillance test, MO 2035, HPCI l ,

fO l a l I outboard steam supply isolation valve failed to close. Valve required to be l a

10141loperable per T.S.3.7.D.l. Inhoard HPCI steam supply isolation valve closed l ,

I~ lOlsi Ii.a.w. T.S.3.7.D.2. No effeet on publJ. health or safety. Two occurrences of l l i

1016i Lp. similar nature were reported in A0 263 /74-25 and M-RO-77-09. l 10171 1 I IOla l l I r s9 80 C DE CODE SUBCO E COYPONENT CODE SU8C DE S DE lO19l f~ H l Sl Dl@ y@ lX l@ lV l A l Ll V[ 0l P[@ ]@ { @

9 10 11 12 13 18 IS 20

• _ SE QUE NTI A L OCCURRENCE REPORT R EVISION LER EVENT YF AR REPOR T NO. CODE TYPE NO.

ar la 11 I

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_ 21 22 l-l 2J 1010111 24 26 1/l 27 10131 28 , 29 l XI 30 l-1 JI W

32 T KEf ACT ON ON PLANT ET HOURS SB IT FOR1 UO. SUPPLI E MAN FACTURER l33A l@J4W@ W@

35 lZ [@

36 l0 l0 l 0l 0l 3/ 40

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42 lAl@ [ L l 2 ] 0 l 0lg 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h IiloIlLimitorque SMB-0, 240V DC motor operator limit switch and torque switch f ound  ;

^

l ' l i l I men. Solidified grease in limit switch gear train caused switch to remain l 1

E 1lopen. Limit switch an.1 limit switch gear train replaced. PM procedures l li111Irevised to include crease check in limit switch near train. Possibly ef fected l g i l4 i l similar valves inspected , no adverse conditions f ound .  ;  ;

O STA S  % POWE R 01"g ri S T4 yys $1SC$$RY I DISCOVERY DESCHiPTION 8 R l E l@ l 1 l 0 l 0 l@l '

NA l y @l Surveillance Test l U O 80 ACTIVITY CO TENT RELE ASED OF RELE ASE AMOUNT OF ACTIVITY , LOCATION OF RE LE ASE l1 l6" l'[3] @ [3J@l '

NA I l NA l

' " " 8 PEnSONNEt exPOSur'iES ,

NUMBER TYPE DE SCRIPTION I i

l i l il' l 0 l 0 l 0l@lZ l@l NA l

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' PEnsONNE t mm' dies 80 NUV9E R DESCINP1 TON I

i I a H 9 l 0l 0l 0lhl NA 33 12 l

LOSS OF OR DAMAGE TO FACILITY TYPE DE SC RipilON l I 3 I 899 I b@{ 10NA 7

r l PUGLICITY SO MSUEn DE SC RIP TION 4S NRC USE ONLY j I2 I I l Nj@l NA

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' 8 8 'o .a A. V. Woj chouski E.9 eoi 8204020537 820323 (612) 295-5151 o PDR ADOCK 05000263 PHONE: g S PDR

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