ML17317B330

LER 79-020/03L-0 on 790615:several Valves Exhibited Excessive Leakage,Causing as-found Leak Rate to Exceed Limit.Major Source of Leak Attributed to Check Valves.Caused by Sand Deposits on Seating Surfaces & Pitted Seats

ML17317B330
Person / Time
Site:	Cook
Issue date:	07/13/1979
From:	Bellman T INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317B329	List: ML17317B326 ML17317B330
References
LER-79-020-03L-01, LER-79-20-3L-1, NUDOCS 7907190537
Download: ML17317B330 (4)

Text

NRC FORM 366 U. S. LEAR REGULATORY COMMISSION 37.77) "

tCFNSEF. fVENT REPORT 4 A CONTROL BLOCK: Q1 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

I 6 8 9 M I D LICENSEE CODE C C 2 14 Q2 15 0 0 0 0 0 0 0 0 0 0 0 25 Q3 26 4 X Z 1 LICENSE TYPE i QE~

30 57 CAT 58 Qs CON'T

~LQ6 0 5 0 0 0 3 1 6 Q7 0 6 1 5 7 9 QB Q 7 g 3 7 9 Q9 7 8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES +10 I

WH LE PERFORMXNG THE TYPE B ANl5 C LEAK RATE TEST SEVERAL VALVES EXHIBITED EXCESSIVE LEAKAGE CAUSXNG THE TOTAL AS FOUND LEAK RATE

~O3 TO EXCEED THE LIMIT IMPOSED BY T. S. 3. 6. 1.2 b., SIMILAR OCCURRENCES

~O6 INCLUDE: 050-0315/76-23,77-11 AND 78-37.

~O6

~O

~OB 80 7 8 9 t SYSTEM CAUSE CAUSE COMP. VALVE

~SD CODE CODE E

SUBCODE

~E COMPONENT CODE X

SUBCODE pJ ~

SUBCODE Qs

~

Q11 Q12 Q13 Q74 Qs 7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION Q17 LF RIRP 887997 ACTION FUTURE EVENT YEAR 21 22 EFFECT

+

23 SHUTDOWN

~02 24 REPORT NO.

0 26 27 28 ATTACHMENT CODE 29 NPRDP TYPE 30 PRIME COMP.

31 NO.

32 COMPONENT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER 33 Q18 ~Z 34 Q19 ~ZQ29 35

~ZQ27 36 37 0 0 0 0 40

~Y 41 Q23 ~YQ24 42

~A 43 Q25 44 X 9 9 9 47 Q

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 THE MAJOR SOURCE OF LEAKAGE WAS ATTRIBUTED TO THE NESW CHECK VALVES (LUNKENHEIMER MODEL N1573C-61/65-994) AND SEVERAL FISHER VALVES (MODEL 5 76-10). THE NESW CHECK VALVES WERE REPLACED WITH MARLIN COMPANY VALVES WHXCH.ARE FELT TO CONTAIN SUPERIOR MATERIALS. THE FXSHER VALVES SEATS WERE CLEANED ( SEE SUPPLEMENT) 77 8 9 80 FACILITY STATUS Ts POWER OTHER STATUS Q METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32

~ls ~GQ28 ~0.0 0 Q29 ~BQ31 SURVEILL ANCE TEST 7 8 9 10 12 13 44 45 46 80 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITY Q LOCATION OF RELEASE Q Pgg8 9 '339'10 'Q34 7

NA 44 45 NA 80 PERSONNEL. EXPOSURES NUMBER TYPE DESCRIPTION 7 ~00 0 Q37 Z Q3s EA 80 7 8 9 11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTION Q41 8 ~OO O Qs NA 7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY 7 8 9 10 43 rV~ 9 0~ ~7 7

80 PUBLICITY NRC USE ONLY ISSUED DESCRIPTION Q mZ 7 8 WNQ44 9 10 NA 68- 69 80 o 616-465-5901 0 NAME OF PREPARER T. P. Beilman

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SUPPLEMENT TO LER 879-020/03L-0 SUPPLEMENT TO CAUSE DESCRIPTION AND THE VALVES WERE RESTROKED. THE "AS LEFT" DATA FOR BOTH TYPES WAS WITHIN LIMITS.

THE CAUSE OF THE NESW CHECK VALVE LEAKAGE WAS ATTRIBUTED TO A COMBINATION OF SAND DEPOSITS ON THE SEATING SURFACES AND PITTED SEATS AND/OR FLAPPERS. REPLACEMENT OF THE VALVES SHOULD PRECLUDE RECURRENCE.

IN ADDITION TO THE REPAIR/RESTROKING OF THE FISHER VALVES A PRE-CAUTIONARY MEASURE OF INSTALLING SERRATED EDGED WASHERS ON THE ACTUATOR MOUNTING BOLTS OF THE VALVE ACTUATORS IS BEING PERFORMED.

THIS REDUCES OR ELIMINATES ACTUATOR BODY MOVEMENT DUE TO VALVE TRAVEL AND WAS PREVIOUSLY PERFORMED ON UNIT ONE WITH SUCCESSFUL RESULTS.

THE REMAINING VALVES FAILURES WERE RANDOM IN NATURE AND DID NOT SIGNIFICANTLY CONTRIBUTE TO THE OVERALL LEAKAGE VALUE. NO FURTHER ACTION IS CURRENTLY PLANNED IN ADDITION TO THAT ALREADY PERFORMED.

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