ML19274D369

LER-78-109/03L-0 on 781224:the a Residual Heat Removal Loop Could Not Be Maintained Full of Water Because a Discharge Check Valve Was Not Closing Properly.Disassembly Revealed No Cause for Sticking

ML19274D369
Person / Time
Site:	FitzPatrick
Issue date:	01/18/1979
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19274D361	List: ML19274D360 ML19274D369
References
LER-78-109-03L, LER-78-109-3L, NUDOCS 7901230254
Download: ML19274D369 (2)

Text

(7 77)

LICENSEE EVENT REPORT 4 COk' TROL BLOCK: l l

l l l l l 6

h (PLEASE PRINT OR TYPE alt. REQUIRED INFORMATION) jo lil lN lY lJ l A lF l 1 l@l0 l0 l- l0 l0LICENSE l0 l0NUVSER l- l0 l0 l o l@l<1 25 26 l1 LICENSE1 l1TYPE l1JOl@l57 CATl 68 7 8 9 LICENSEE CODE 14 tS CON'T o i ['g"c' [ L l@ 0 l 5 l 0 l 0 l0 l 3 l 3 l683 @l 63 1 l2 12 l4 l7 lR @lol1 EVENT DATE 74 75 l1 lq le In80l@

REPORT DaTE 7 8 60 61 DOCKET NUVSE R EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h 1 o 12 l l Please See Attachment l 0 3 l 0 4 l l

0 5 l l 0 6 l l

0 7 l 0 8 l 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COVPONENT COLE SUSCODE SUBCODE 99 [C lF j@ ]@ l Xl@ lV l Al L lV l E l X @ y@ y @

10 12 13 18 19 20 7 8 9 11 SEQUENTI AL OCCURRENCE REPORT REVISION EVENT YE AR REPORT NO. CODE TYPE N O.

LER RO

@ RE l7 8l l 1 0 9l l/[ [0 i3 l lL l 9 l0l 32

_ 21 22 23 24 26 27 28 29 30 31 TAK ACTC ON PL NT T4 HOURS 22 S B IT FOR1 B. SUPPLt MAN FACTUPER 15 33 l@l34 Z@ l l35Z l@ lZl@

Jti l0l0l0 31 l

40 lYlg 41 g g g g 42 43 lPl3l1[2lg 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o Please See Attachment l

li lil i I

i 2 I 1 3 l l

i 4 I 80 7 8 9 ST S  % POWE R OTHER STATUS IS O RY DISCOVERY DESCRIPTION NA Operator Observation l i s lC l@ l 010 l 0 l@l l lAl@l ACTIVITY CONTrNT GELE ASED OF RE LE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA l l NA l L'.lo_I 1 8 9 12 l @ W@l to 11 44 45 80 PERSONNEL FXPOSURES NUVRE R TYPE D E SCRIPTION i 7 l0 l0 l0j@lZl@l A l PERSONNE L INJURIES NUVBER DEECRIPTION NA l 7

1 s 8 9 l0 l0 l0 l@l 11 12 80 LOSS OF OR D AM AGL TO FACILITY TYPE DESCRIPTION NA l 7

i 9 8 9 lZl@l to 80

' NRC USE ONLY l2 lol ISSUE  ! l @ DESCRIPTION NA l 68 69 ll llllllll l}

80 7.

7 8 9 to

~

N A?/E OF PREPARER PHONE:

7 9 012 3 0 2f'l

ATTACllMENT TO LER 78-109/03L-0 Page 1 of 1

~

During routine plant startup operations, the A RilR loop could not be maintained full of water following operation of the A RilR pump. RiiR pump A had been operated to bring the pressure suppression pool (torus) level to within Technical Specification limits prior to startup. Investigation revealed that the discharge check valve on the A RIIR pump was not closing properly and thus allowing the discharge header to drain through the check valve and pump to the torus.

In order to permit plant startup to proceed,the A loop RilR pumps were placed in operation in the torus cooling mode. This action allowed the RIIR pumps to main-tain the discharge header full and thus meeting the requirements of Technical Specifi-cation, Appendix A, Paragraphs 3.5.A.3 and 3.5.G. This alternate system lineup (torus cooling mode) is automatically terminated and appropriate motor operated valves are repositioned for LPCI mode operation of the system in the event a LPCI injection signal is present.

When time permitted (following plant startup) on December 27, 1978 (approximately 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> after the initiating event), Operations Surveillance Test F-ST-2L titled "One RiiR Pump Inoperable Test"was completed with satisfactory results. This action satisfied the requirements of Technical Specification Appendix A, paragraph 4.5.A.3.a and allowed RIIR pump A to be isolated from the A loop and be declared inoperable.

When the discharge check valve was dissassembled, no cause for the apparent sticking could be found. The valve was reassembled, the RIIR pump was tested and declared operable. RIIR pump A was out of service for approximately 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.