05000029/LER-1976-011-03, /03L-0:on 760907,slight Leakage Noted from Welded Nipple on Charging Pump 3 Discharge Heater Line.Caused by Failure to Allow 1/16-inch Pull Back Gap During Installation of Weld.Pump Isolated & Nipple Replaced

/03L-0:on 760907,slight Leakage Noted from Welded Nipple on Charging Pump 3 Discharge Heater Line.Caused by Failure to Allow 1/16-inch Pull Back Gap During Installation of Weld.Pump Isolated & Nipple Replaced

ML19347C434
Person / Time
Site:	Yankee Rowe
Issue date:	10/07/1976
From:	Janet Staub YANKEE ATOMIC ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19347C433	List: 05000029/LER-1976-011, Forwards LER 76-011/03L-0 05000029/LER-1976-011-03, /03L-0:on 760907,slight Leakage Noted from Welded Nipple on Charging Pump 3 Discharge Heater Line.Caused by Failure to Allow 1/16-inch Pull Back Gap During Installation of Weld.Pump Isolated & Nipple Replaced
References
LER-76-011-03L, LER-76-11-3L, NUDOCS 8011190350
Download: ML19347C434 (2)

LER-1976-011, /03L-0:on 760907,slight Leakage Noted from Welded Nipple on Charging Pump 3 Discharge Heater Line.Caused by Failure to Allow 1/16-inch Pull Back Gap During Installation of Weld.Pump Isolated & Nipple Replaced

Event date:
Report date:
0291976011R03 - NRC Website

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EVENT DESCRIPTION

gg l During normal operation the operator noted slight leakage from a welded nipple on thel 7 89 80 RE l No. 3 charcing numn discharge header drain line.

The ptrnp was isolated and recair l

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The ninnie was renlaced in kind. tested satisfactorily and the numn was l

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lNo. 3 charging pumo cubicle vented to PVSl AMOUNT OF ACTIVITY LOCATON OF RELEASE E5 12 lMl y

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10 11 44 45 80 PERSONNEL EXPOSURES N"JV8E R TYPE CESOR;PTON 8 I ol 01 of l_Zj i NA l

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80 7 89 AOD:TIONAL FACTORS [iBI 80 7 89 8U 111 n o 370 l

la l 7 89 es L. M 3M NAME:

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LER 76-11/03L i

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CAUSE DESCRIPTION Investigation of failed weld area indicated that a full 1/16" pull back gap was not allowed during the installation of the pipe. A full 1/16" minimum pull back was ensured during the repair.

1 The welding procedures were reviewed with plant welders to ensure this incident would not be repeated.

Since the No. 3 charging pump discharge header contains many new socket welds, due to the installation of a pulsation dampener, the system was radiographed. Proper pull-back was verified on all welds.

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NRC Foav 195 r, U.S. NUCLE AR GEGULATORY CkMISSION (2-761 DOCKET NUMEE RQ nLE NUueER NRC DISTRIBUTION roR PART 50 DOCKET MATERI AL INCIDE!iT REPORT FROM:

TO:

Mr O'Reilly Yankee Atomic Elec Co oATE F DOCUMEN*

10-7-76 ROwe, Mass H A Autio DATE RECEIVEo 10-12-76 NEITER ONOTORIZED PROP INPUT FORM NUMEER OF COPIES RECEIVED D ORIGIN AL QhNC L ASSIF t E D gCoav ICc OESCRIPTION EN CLOSU RE Ltr trans the following:

A Licensee Event Report (R0476-ll/03L) On 9-7-76 Concerning a weld failure pa the

1. 3 charging pump discharge header drain

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Yankee Rowe NOTE:

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