ML20004D068

LER 81-011/03L-0:on 810507,during Normal Operation of Reactor Water Cleanup Sys,Leak Discovered in 1x34 Inch Socket Weld Reducing Fitting in tube-side Drain Line of Regenerative Heat Exchanger E-15-1A.Cause Being Analyzed

ML20004D068
Person / Time
Site:	Vermont Yankee
Issue date:	06/03/1981
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20004D065	List: ML20004D064 ML20004D068
References
LER-81-011-03L, LER-81-11-3L, NUDOCS 8106080297
Download: ML20004D068 (1)

Text

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. NRC F5M 366 U. S. NUCLEAR REGULATORY COMMISSION (7 7H

LICENSEE EVENT REPORT LER 81-ll/3L

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) l0 l 18 9l l VILICENSEE 7

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lo l2l l During normal operation of the Reactor Water Cleanup System, routine operator sur- 1 I o l a i l veillance discovered a small leak in a 1" X 3/4" socket weld reducinn fitting in l I o 141 l the tube-side drain line of Recenerative Heat Exchancer E-15-1A unstream of valve 1 l o ! s 1 LV12-41A. There were no consequences adverse to the public health and safety as a l l o is I i result of this event. Similar previous occurrences were reported to the Commission i I o I 7 I l as LER 79-01. 80-37 and 80-41. l 1 o 14 ! I l 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCODE COMPONENT CODE SUSCODE SUSCODE lo19l 7 4 lC lC l@

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41 lYl@ lAl@ lE l0 l6 l5 l@ 47 35 36 40 42 43 44 CAUSE CESCRIPTION AND CORRECTIVE ACTIONS h l i i o I ] Previous incidents of cracking in this system are being analyzed by an independent l lilij l laboratory to determine the failure mode, and the results of this analysis will be  !

i,,2; l reported to the Commission in an update to the applicable LER's. Immediate l

[,l3l l corrective action in this case was to replace the degraded fitting with an I i i 141 l identical spare. I 7 g 9 80 ST S  % POWER OTHER STATUS 015 O RY DISCOVERY DESCRIPTION li15l d h l1l0l0l@lo

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l 45 NA 80 PERSONNEL. E XPOSUR ES NUMBER TYPE DESCRIPTION '

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NAME OF PREP ARER W. P. Murphy PHONE: (802) 257-7711 E, 810608a 2 D