ML20052B283

Updated LER 79-038/99X-1:on 791103,leakage Discovered on Aerated Radwaste Drainline.Caused by Pitting or Cracking in 4-inch Type 304,schedule 10s Stainless Steel Pipe Initiated by Chloride Contamination.Damaged Pipes Taken Out of Svc

ML20052B283
Person / Time
Site:	Millstone
Issue date:	04/21/1982
From:	Criscione J NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20052B278	List: ML20052B277 ML20052B283
References
LER-79-038-99X, LER-79-38-99X, NUDOCS 8204300253
Download: ML20052B283 (1)

Text

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LICENSEE EVENT REPORT UPDATE REPORT (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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8 60 61 DOCK ET NUYBER EVENT DESCRIPTION AND PROBABLE CONSEOUENCES h o 12 j l Leakage was discovered on an aerated radwaste drain line. Examination revealed I l

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o i3 j -l apparent pitting or cracking in a 4 inch type 304, schedule 10S stainless steel pipe I

{ o l4 j l on a normally isolated intertie connection with the clean liquid radwaste syste'm.

I j o isi l The leakage was contained within the Radwaste System.

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3S 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I l s l O 11 The cause of pipe cracks was transaranular stress corrosion crackino initiated by I

chloride contamination of aerated waste process flow. Through-wall pitting in the y,j,jl same section of pipe was also caused by chloride induced pitting attack. All suspect g

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ed portions of damaged piping has been taken out of service or replaced.

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