05000029/LER-1976-005-03, /03L-0:on 760520,auxiliary Operator Noted Slight Leakage from Weld on Inlet Charging Pump 3 Relief Valve. Caused by Pullback Gap Not Allowed During Installation of Pipe & Vibration Induced Fatigue Failure

/03L-0:on 760520,auxiliary Operator Noted Slight Leakage from Weld on Inlet Charging Pump 3 Relief Valve. Caused by Pullback Gap Not Allowed During Installation of Pipe & Vibration Induced Fatigue Failure

ML19345A597
Person / Time
Site:	Yankee Rowe
Issue date:	06/03/1976
From:	Janet Staub YANKEE ATOMIC ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19345A596	List: 05000029/LER-1976-005, Forwards LER 76-005/03L-0 05000029/LER-1976-005-03, /03L-0:on 760520,auxiliary Operator Noted Slight Leakage from Weld on Inlet Charging Pump 3 Relief Valve. Caused by Pullback Gap Not Allowed During Installation of Pipe & Vibration Induced Fatigue Failure
References
LER-76-005-03L, LER-76-5-3L, NUDOCS 8011240266
Download: ML19345A597 (2)

LER-1976-005, /03L-0:on 760520,auxiliary Operator Noted Slight Leakage from Weld on Inlet Charging Pump 3 Relief Valve. Caused by Pullback Gap Not Allowed During Installation of Pipe & Vibration Induced Fatigue Failure

Event date:
Report date:
0291976005R03 - NRC Website

text

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7 89 14 15 25 26 30 31 32 CATEGOAY T E SO OOCKET NUVDEA EVENT DATE AEPOAT DATE O 1 CONT l l

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EVENT DESCRIPTION

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l Durine routine startup the auxiliary operator noted slight leakage from the weld on 7 89 Bo

@ l the inlet to the No. 3 charging pump relief valve. Charging was transfered to the l

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$ lNo. I charging pumo. This event is reported as Reportable Occurrence 50-29/76-05 in l

7 89 80 39 l acenrdnnce with Technical Snecification E.2.b. (2).

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C E CO E COMPONENT CODE UPPL A MA A

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l Zl 9l 9l 9l l Nl 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION DE l The apparent cause of the wold crack was that a full 1/16" pullback gap was not l

7 89 80 l allowed durine installation of the pipe and vibration induced fatigue failure resultedl 09 7 89 80 l The affected section was replaced in kind and returned to service.

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's'TAEs' "6'rs'COvt AY s POwEa 0 wEA status DisCOvEAY DEsCApTcN 1

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[BJ l Routine Operator Inspection l

7 8 9

10 12 13 44 45 46 80 ACTIVITY CONTENT RELEASED OF FiELEASE l Gas - 113 ucuries l

lPABCubicleAreaVentedviaPrimalyStackl AMOUNT OF ACTivtTY LOCATON OF AELEAsE lL l [JJJ 1

7 8 9

10 11 44 45 80 PERSCNNEL EXPOSURES NUVBE A TYPE CESCA!PTON [010 l 0 l [Zj l NA l

13 7 89 11 12 13 80 PERSONNEL INJURIES NUMBE A DESCA:PTON l0 l0 l 0l l NA l

1 7 89 11 12 80 OFFSITE CONSEQUENCES l Lenknoe contained within cubicle area and vented via monitored primary vent stack.

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7 89 80 LOSS OR DAMAGE TO FACILITY TYPE CESCR'PTON W

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1 7 89 10 80 PUBLICITY I'

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7 89 80 ADDITIONAL FACTORS nl l

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2-co, elusion ile have concluded that the proposed change does not present significant hazards considerations not described or implicit in the hazards succary and that there is reasonable assurance that the health and safety

report, of the public will not be endangered.

Original signed by,:

Roger S. Boyd Roger S. Boyd, Chief Research & Power Reactor Safety Branch Division of Reactor Licensing NOV 1 1966 Date:

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• 4 MIS 3tOf 4 DOCKEl > Uf 40EH av jo-JL 9 NRC DISTRIBUTION ron PART S0 DOCKET t.1ATERIAL INCIDEt:1 1:EPORT ITO: Yankee Mr O'Reilly THOM: Yankee Atomic Elec Co DATE OF DOCUMENT

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l Rowe, Mass 6-3-76 l

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DATE RECElVED 6-7-76

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OontGINAL

't)U NC L ASSIF IE D i

OcoPy none signed l' DE SC HIP TsO N E NCLOSU R E 4

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Licensee Event Report PROF 76-05/3L) cn 5-20-76 concerning slight leakage from the weld on inlet to #3 charging pump relief valve

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Yankee Rowe NOTE:

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