ML17317B325

LER 79-034/03L-0 on 790613:several Valves Exhibited Excessive Leakage Causing as-found Leak Rate to Exceed Limit.Caused by Leakage from Check Valves.Check Valves Replaced

ML17317B325
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
ML17317B324	List: ML17317B323 ML17317B325
References
LER-79-034-03L, LER-79-34-3L, NUDOCS 7907190520
Download: ML17317B325 (3)

Text

NRC FORM 366

{7.77) tCENSEE EVENT REPORT

' CAJTROL BLOCK: 1 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

I 6

~o> M I D C C IQ8 0 0 0 0 0 0 0 0 0 0 0Q84 1 1 1 1Q4~Q8 7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T

~81 """ ~LQ8 0 5 0 0 0 3 1 5 Q7 0 6 1 3 7 9 Q8 0 7 I 3 7 Q8 DOCKET NUMBER 68 69 EVENT DATE 74 '75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 WHILE PERFORMING THE TYPE B AND C LEAK RATE TEST SEVERAL VALVES

~o3 II I EXH B TED EXCESS VE LEAKAGE CAUS NG THE TOTAL AS FOUND LEAK RATE I 4 TO EXCEED THE LIMIT IMPOSED BY T . S . 3 . 6 . 1 . 2 . b . S IMILAR OCCURRENCES 6

INCLUDE 050 03 1 5/76 23 g 77 1 1 AND 78 37 ~

~OB

~OS 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

~SD Q44 E Qi8 ~B Qi8 V A L V E X Q4 ~X Q8 D Q8 11,

"'""'U'l LoJ.M 7 8 9 10 12 l3 18 19 20 SEQUENTIAL OCCURRENCE REPORT R EV IS I ON EVENT YEAR REPORT No. CODE TYPE NO.

Q LERiRP 21 22 23 24 26 K~I 27.

M3 28 29 L~l 30 Ll 31 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDQ PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS +22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER Q1S ~QIB ~Q2O ~Q21 0 0 0 3 Y Q23 ~YQ24 ~AQ25 X 9 9 9 Q26 33 34 35 36 37 40 4'I 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 THE MAIN SOURCE OF LEAKAGE WAS DETERMINED TO BE THE NESW CHECK VALVES (GULF COMPANY MODEL IM-815-2021-SR) WITH A COMBINATION OF SAND DEPOSITS cDQ ON THE SEALING SURFACES AND PITTED SEATS AND/OR FLAPPERS CONTRIBUTING TO THE EXCESSIVE "LEAI<A'GE~ TO PREVENT RECURRENCE i THE CHECK VALVES 3

WHICH EXHIBITED EXCESSIVE LEAK. RATES ( SEE SUPPLEMENT) 7 8 9 80 FACILITY METHOD OF QBO DESCRIPTION STATUS  % POWER OTHER STATUS DISCO/ERY

~@CQgP

[iiQ ~H 8 9 Q28 ~00 10 0

12 Q88 13 NA 44 MQ31 4S 46 80 ACTIVITY CONTENT Q

9, REI.EASED OF RELEASE . AMOUNT OF ACTIVITYQ36 LOCATION OF RELEASE 6 ~Z Q33 Z Q34 NA NA 7 8 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39 7 ~0000 00 Q8 7 5 Q8 8 8 9 12 13 80 Ojl'lo>AP 7 11 PERSONNEL INJURIES 7

8 8

~~~

9 NUMBER 11 Q40 DESCRIPTION 41 12 g 80 4

LOSS OF OR DAMAGE TO FACILITY ~43 TYPE DESCRIPTION Z Q42 7 8 9 10 80 PUBLICITY NRC USE ONLY o

7 8 9 10 68 69 80 o T. P. Bei1man 616-465-5901 0 a

NAME OF PREPARER PHONE: 47

a Jh

SUPPLEMENT TO, LER 5 79-034/03L-0 SUPPLEMENT TO CAUSE DESCRIPTION WERE REPLACED WITH A MARLIN COMPANY VALVE WHOSE CONSTRUCTION IS FELT TO BE SUPERIOR TO THE GULF VALVES.

OF THE REMAINING VALVES WHICH EXHIBITED EXCESSIVE LEAKAGE, A COMPARATIVE STUDY OF THE PREVIOUS LEAK RATE TESTS INDICATES THAT THE MAJORITY ARE NOT CONSECUTIVE FAILURES THROUGHOUT ALL OF THE FOUR TESTS (PRESENT INCLUDED) AND NO FURTHER ACTION IS CURRENTLY PLANNED.