05000298/LER-1980-052-03, /03L-0:on 801230,RHR Svc Water Sys Throttle Valve SW-MO-89A Failed to Respond to Remote Controller After Opening to Min Flow Position.Cause Unknown.Investigation Underway

/03L-0:on 801230,RHR Svc Water Sys Throttle Valve SW-MO-89A Failed to Respond to Remote Controller After Opening to Min Flow Position.Cause Unknown.Investigation Underway

ML19345F464
Person / Time
Site:	Cooper
Issue date:	01/29/1981
From:	Doan P NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19345F459	List: 05000298/LER-1980-052, Forwards LER 80-052/03L-0.Detailed Event Analysis Submitted 05000298/LER-1980-052-03, /03L-0:on 801230,RHR Svc Water Sys Throttle Valve SW-MO-89A Failed to Respond to Remote Controller After Opening to Min Flow Position.Cause Unknown.Investigation Underway
References
LER-80-052-03L, LER-80-52-3L, NUDOCS 8102170523
Download: ML19345F464 (1)

LER-1980-052, /03L-0:on 801230,RHR Svc Water Sys Throttle Valve SW-MO-89A Failed to Respond to Remote Controller After Opening to Min Flow Position.Cause Unknown.Investigation Underway

Event date:
Report date:
2981980052R03 - NRC Website

text

--

PIRC PoSM 366 U. S. NUCLE AR REGULAroRY CoMMISSloN wi LICENSEE EVENT REPORT CONractStoCoI, I

l I

1 1

l@

iPtEASE PRiNr oR rvPE 4tt REcuiREo iNPoRuarioNi l 0 l 1 l l N l E l Cl Pl Rl 1l@l 0l 0l - l 0 l 0 l 0 l 0l -l 0l 0l 0l@l /. l 1 l 1 l 1l 1[@l l

l@

7 4 3 LacENSEE CODE 14 1S LICENSE N-aV6ER 25 215 LICENSE TvPE JO

$7sATSd CON'r 10l1I

."$"CE I Lhl0 l 510 l 0 l 0 l 2 l 9 I 8 l@l 11 21 31 01 dl 01 il ?! 9l 81 il@

/

8 60 el OOCK ET NuveER 6d 69 EVENT DATg 14 75 PsPO*T OATE 80 EVENT oESCRiPrlON ANo PROB ABLE CONSEQUENCES h I o I 2 I During normal surveillance testing of the RHR Service Water Systegi SE-Mo-89A. the 1 1

loI31l Loop "A" system throttle valve on the discharge of the "A" RHR heat exchanger, afteri j.

19141 ppening to the minimum flow position would not respond to the remote controller. Thel Io !s] l redundant loop was operable as well as both diesel generators. There were no adversel l

f a ls t laf fects to the public health and safety.

(RTS 3.5.B) 1 10171 l i

l I 0181 I 83 r

es

' $NE [O$E susci$E C

CovPONENT CODE S SC OE SU OE L,o L2J,,

l c I r l@ L,,x_J@ L,,3_J @ l v I A l t I vio le l@ L,2A_j@ [Z_j @

3

,o

,2 m

SEQUE NTI AL OCCURRENCE REPORT REVISION LER RO EVENTYEAR REPORT No.

CODE TYPE NO

@ agg I81 01 l-l 10Isl21 1/l I ol 31 LJJ I-1 LJ 9

u

_ 21 22 23 24

.6 27 28 M

30 31 32 TA N AC O ON PL NT VET HOURS SS IT FOR 9.

S PP MANUFACTURER LzJ@LxJ@

1.z.J@

LI_J@

l01010101 lsJ@

l l@

LLJ@

lt 121010 l@

l 3J J4 Jb 36 3

40 41 42 4J 44 47 CAUSE oESCRIPrioN ANo CORRECTIVE ACTIONS l > t o l lSW-M0-89A is a 18", 300# Globe valve with a timitorque SMB-3 motor operator. The l

}

I i I i i leauee of the problem is unknown. The failure could not be repeated. Recorders are I

4 m l monitoring output of the controller, feedback from the valve positioner, and the I

i ' I 3 I lopen and close contacts on the operator motor for 5 subsecuent valve oeerations to l i

LL,14 ] Ivori #v nnornhiliev 80

?

8 9 STA

. POWER OTHER STATUS ISCO RY OiSCOVERY DESCRIPTION 1 i i o 1 [E_j@ l Ol 91 9l@l NA l

l Bl@l Operator Observation l

8

'JT,v,Tv CDATENT AMOUNT OF ACTIVITY @ l LOCATION OF REMASE @

REM ASEO N REM ASE NA l

NA l

IT (z_j @ lz.j@l 7

a 7 to tt 44 45 80 PE RSONNE L (EPOSURES l

NUMBER TYPE DESCRIPTION 39 li l il l010 l o l@[ zJ@l NA l

'o PERsONNE'L,mu'!,ES DESCR,PT,0N@

Nue ER LLL ] I 01010 l@l NA I

80

/

M 1 11 12 t

h of OH O TAG TO F ACittTV l

Lua.J l z l@l NA 80 r

4 9 to Putu H.fv NRC USE ONL Y l

45 l

NA g,,;;y,,,,,9lj l I n l l N l'@ancniptioy c.e t i

.0. ;

e.

a 9

'o NAVE OF PREPARER PHONE:

6102

-- 1 7 05c.-