ML20064J229

LER#78-061/03L-0 on 781012:during Performance of Containment Isolation Check Valve Surveillance test,1A RCP Seal Injection spring-loaded Check Valve Was Found to Have an Opening Pressure of 11.5 Psid.Caused by Excess Force

ML20064J229
Person / Time
Site:	Beaver Valley
Issue date:	12/22/1978
From:	Werling J DUQUESNE LIGHT CO.
To:
Shared Package
ML20064J198	List: ML20064J194 ML20064J216 ML20064J226 ML20064J229
References
LER-78-061-03L, LER-78-61-3L, NUDOCS 7812290235
Download: ML20064J229 (1)

Text

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N5a:PCCit36S U. S. NUCLEAR REGULATCGY COMMISSION 87 77)~

LICENSEE EVENT REPORT (PLEASE P%lNT OR TYPE ALL REQUl EO INFORMATIONI CONTROL 8 LOCK: l i

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lh GTil8 I9P l ALICEN5EE l B !CCCE V l S l 1 l@l 14 0 l0 l- l blCENSE 0 l0 lNWVUER 0 l0 ]O l- l0 l 0 JS l@l4 26 l1 l1 l1 l1 l@l$7 wAT LICENSE TYPE JO l

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61 OOCK ET Nuv8 tR bd ed EVENT QATE le REPORT OATE EVENT DESCRIPTION AND PROSA8LE CONSECUENCES h 0 2 l During the performance of the containment isolation check valve surveillance test. I O 3 l the 1A RCP seal injection spring-loaded check valve was found to have an opening l 0 . l pressure of 11.5 PSID which is greater than the limit of 6 PSID. The valve l lO is; i sa'tisfied the isolation critetia in that the valve remained closed with less than l gl 1.2 PSID. The slightly increased pressure differential would have been I

@l inconsequential in the operation of the RCP Seal Injection System. l a

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E COE SU8CO E COMPONENT CODE SUB 00E 5 E 7

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. SEQUENTIAL OCCURRENCE REPORT R EVISION LE EVENT YEAR REPORT NO. CODE TYPE N O.

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS ITTT11 The incident apparently resulted from excess force on the check valve closing I g] spring. The spring retainer was machined 5/64 inch (with manufactitrer annrovn1) I

,I 3l to expand the spring and lower the opening setpoint. The valve was retested and iti

, ., l operated satisfactorily at 3.3 PSID. l i 4 I l 7 8 9 80 ST  % POWER OTHER STATUS DIS RY DISCOVERY DESCRIPTION y [G_j@ l0l0l0l@l N/A l lBl@l Surveillance test l A T1vtTV CO TENT CE LE ASE D OPmELEASE AMOUNT OF ACTivtTY LOCATION OF RELEASE W l Z l @ [_Zj@l 10 N/A 44 l l 46 N/A 80 l

7 8 9 11 PERSONNEL EXPC50RES NUM8ER TYPE CESCRIPTION 7

l010l0l@lZl@l N/A l PERSONNE L INJURIES NuveER DESCRIPTION i

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7 8 9 10 68 69 80. ;

NAME OF PREPARER

. A. linR PHONE:

412-643-1258

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