ML19031B167

LER 1978-026-03 for Salem Unit 1 Failure of Motor Operated Valve

ML19031B167
Person / Time
Site:	Salem
Issue date:	07/12/1978
From:	Librizzi F Public Service Electric & Gas Co
To:	Grier B NRC/IE, NRC Region 1
References
LER 1978-026-03
Download: ML19031B167 (4)

Text

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Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /622-7000 July 12, 1978 Mr. Boyce H. Grier r- "<

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Director of USNRC ...r:_ C:)

- . */i r,~ CJ Off ice of Inspections and Enforcements *: ... ~- -' j ... -*

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Region 1 \~ ;;:~

631 Park Avenue  ::u  :=::::...-:;

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King of Prussia, Pennsylvania* 19406 < -;

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Dear Mr. Grier:

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LICENSE NO. DPR-70 DOCKET NO. 50-272 SUPPLEMENTAL REPORT REPORTABLE OCCURRENCE 78-26/03L Pursuant to the requirements of Salem Generating Station Unit No~ 1 Technical Specifications, Section 6.9.1.9.dt we ar~

submitting Supplemental Licensee Event Report- for Reportable Occurrence 78-26/03L.

• Sincerely yours, F. P. Librizzi General Manager -

Electric Production

'/i1if'~nrm n-..,_

CC: Director, Office of Insp7ctio~*ib~"'-l!liijif lJOCKff fJLf CiiW!

and Enforcement (30 copies) Utrij; Director, Office of Management Information and Program Control (3 copies)

The Energy People

-** .J~eport Npmber:

Report Date:

Occurrence Date:

e I 78-26/03L 7/12/78 5/23/78 Facility: Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 ID.ENTIFICA']:"ION OF OCCURRENCE:

Failure of motor oper~ted valve lSJl (Parallel suction from RWST)

CONDITIONS PRIOR TO OCCURRENCE:

Cold ShutdoW!l - Mode 5 DESCRIPTION OF OCCURRENCE:

While performing Technica]. Specification surveillance test 4.0.S, an open signal was initiated and valve lSJl did not move. Maintenance personnel were notified and found that Limitorque motor windings had failed to ground. Further investigation revealed that failed motor was ;i.ncorrect size. Motor should have been 10 ft. lb~ rated and 5 ft. lb. was found instalied.

DESIGNATION OF APPARENT CAU~E OF OCCURRENCE:

Failure of motor operator was caused by excessive current which re-sulted in motor windings failing to ground. Excessive current was a result of incorrect motor sizing.

Motor was replaced due to events described in LER 77-03/03L. Person-nel error resulted in incorrect motor being installed.

ANALYSIS OF OCCURRENCE:

The incorrect motor installed on lSJl threatened to cause a reduction 6f the degree of redundancy of the engineered safety features in that the suction from the RWST no longer met the required single failure *criteria.

CORRECTIVE ACTION:

The £ailed motor on the operator of lSJl was replaced with a 10 ft. lb.

torque motor and tqe valve was retested satisfactory.

Although this occurrence is felt to be an isolated case, twenty-five (251. motor operators from the Safety Injection, Service Water, Con-tainment Spray, Chemical and Volume Control, and Residual Heat Removal Systems will be selected at,random and valve operator motor sizing will be verified.

~ ..,~ LER 78-26/03Le FAILURE DATA:

I *

• lSJl Motor Operator Manufacturer: Limitorque Size: SMB-00 Prepared by____T_.--:-L__

._s_p~e_n_c_e_r_________

SORC Meeting No. 43-78

~-------------------

""* ... *~u .. "'.c::""" nc\OULAI ORY COMMISSION (7-771

& - ~te Report

• LICENSEE EVENT REP.T lWvious Report Date 6/12/7)

CONTROL BLOCK: I I* . I I I IQ (PLEASE PRINT OR TYPE ALL REQUIREC IN FORMATION I

- , ""' t 6

[ill *1 N !J I s I G I s I 1 IG)I o I oI -1 o I o I oI o I o I - I o I o 101 4 I 1 I 1 J 1 I 1 181 I I© 1 8 9 1.JCENSEE CODE 14 15 l.ICENSE NUMBER 25 26 1.ICENSE* TYPE JO 57 CAT 58 CON'T (TilJ 7 8

~~~~; L1J© I o I s I oI o I o I 2 I 1 I 2 101 60 . 61 . OOCl<ET NUMBER 68 69 o I s I 2 I 3 I 1 I a I© I o 17 I 1 I 2 I EVENT CATE 74 75 REPORT CATE 7 1a I@

80 EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES@

[]JI} I While performing surveillance test. an open sjqnaJ was initiated and

(]JI] I valve lSJl did not move. Investigation showed Limitorgue motor winding.I

(([!] failed. Further investigation revealed that incorrect*size motor was

[)))) installed. Motor should have been 10 ft. lb. rated. 5 ft. lb. rated

[]JD was installed. Tl)is is the first occurrence of this type.

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7 8 9 80 SYSTEM CAUSE CAUSE COMP. VAi.VE cooE CODE SUBCODE COMPONENT CODE SUBCOOE SUBCODE IIrrJ 7 8 .

I SIFI@

9 10 l.!.l w@

11 12.

1v1A1L1v101P1e ~ L!J@

13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION

/,"'.;\ l.ER!RO CVENT YEAR REPORT NO. CODE TYPE NC.

\:.:J RePoRr NuMeER 17 I al 21 . 22 1-1 23 10121 61 24 26 1.....--1 27 I ol 31 2S 29 LIJ JO I 1-31 L.!..J 32 ACTION FUTURE EFFECT SHUTDOWN ~ ATTACHMENT NPR04 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED FORM :>UB. SUPPi.i ER MANUFACTURER L£J@W@ L!J@)

33 34 35 W

36 I 01 01 o I 37 40

!. W@ W@ l!!.J@ I L I 2 I .0 I 0 '

41 42 43 44 47 CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS @

[JI[] I Motor* replaced due to events described in LER 77-03/03L. Personnel OJJJ error resulted in incorrect motor being installed. Correct size motor IIIlJ installed and retested. 25 valves selected for motor size verification.I OJil IIEJa 1 9 80 FACILITY ljQ\ METHOD OF OTI-IER STATUS \:::;:! @

o:ma STATUS  % POWER OISCOVERY* DISCOVERY DESCRIPTION 1

W 9

I 0 I 0 I 0 !@l..__ ___,,;N:.:..,l.;;.;A---.._ _.I 10 12 n 44 W@lvalve Surveillance Test 45 46 80 ACTIVITY CONTENT t.=°\

RELEASED OF RELEA$E . AMOUNT OF ACTIVITY *. 1.0CATION OF RELEASE @

DEa 1

W@

9 L!J@I 10

• 11 N/A I 44 45 Nl:A 80 PERSONNEL EXPOSURES ~

NUMBER ~TYPE~ DESCRIPTION~

ITEJ I oI o I o k~W~._..,____,N-.:./..;.A..;...__ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___.

1 a 9 ,1 12 13 so PERSONNEi. INJURIES c.\

NUMBER OESCRIPTION~

ITTI]

1 a I olo I ol@).______._.~N~A:..-------------------------~so 9 11 12 LOSS OF OR DAMAGE TO FACILITY f43\

TYPE DESCRIPTION '::::;:J rIIIJ Lz.J@)'-------......-:*N:.o...:.:A~------------------------------1so 7 8 9 10 PUBLICITY (.;;-\ NRC use 0 y ISSUEOC,;\ DESCRIPTION~ Nl .,

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1 a 9 Lzj~I- 10

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NAMEOFPREPARER~~--T__

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