ML20028E330

LER 82-029/01T-0:on 821228,tiny through-wall Crack Found in heat-affected Zone of Weld on Safety Injection Supply Line from Boric Acid Storage Tanks.Cause Unknown. Fracture Mechanics Analysis Underway

ML20028E330
Person / Time
Site:	Prairie Island
Issue date:	01/12/1983
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20028E326	List: ML20028E325 ML20028E330
References
LER-82-029-01T, LER-82-29-1T, NUDOCS 8301210227
Download: ML20028E330 (1)

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7 8 80 EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES h A l A tiny through-wall crack was found in the heat-affected zone of a wald on the safety l I

j o l injection supply line front the boric acid storage tanks. The line contains 12 w/o 1 o , l boric acid. Visual and volumetric avamination of the line is in progress. l o s l Fracture mechanics analysis is' underway. l l

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g lThis Reportable Occurrence was misnumbered in our letter of December 29, 1982.

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 i o l Not known at this time. More crack indicationsi and another leak have been found. An i I

i i l update report will be issued.

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