ML19225A573
| ML19225A573 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/21/1979 |
| From: | Seelinger J METROPOLITAN EDISON CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| NUDOCS 7907190598 | |
| Download: ML19225A573 (1) | |
Text
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P.hten@en E< bien Company I
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ar.e,.,,n, c'-nsylwn 17057 717 094 4011 21 June 1979 Hr. Boyce H. Grier Directorate of Regulatory Operations Region I fluclear Regulatory Comission 631 Park Avenue King of Prussia, Pennsylvania 19406 Oparating Lie.ense DPR-50 Occket 50-289 p
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' subject:
Reportable Occurrence Na.
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Dear Mr. Grier:
trz%Ifi!
This telegram is to confim the telecnn 8.ic
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Region I. TC and J. L. Seelinger, Unit 1 Superintendent at 1230 on DP June 21, 1979.
C While performing ultrasonic exaninations of Docay Heat Syste, pioing g
on June 20, 1979, as an investigative follow-up to 1.ER =/9-11/ 3L, by leakage was discovered on the 10 inch suction oining frryo the Borated j
Water Storage Tank between valves Ni-V5f./B and "Il-V11A/S.
Cracking W
was confirved by ultrasonic ewamination to be in tha beat affected zone adjacent t'o the pipe weld and was astirnted to ev.tand ovar a d'
total of about 6 inches of the circumference.
The failure of this h
piping is considered to be reportable by Technit.al 30ecifica':f on 6.9.2.A(9).
The leaking pipa was 10 inch Schedule 105 pipin of Tyce 3&1 stainless steel.
ilecause of the siini tarity of piping -atoria; and syste-'
environment to the Soant r al f.colino System eining which was u
metallurgically analyzed, it is suscact=d 'ha t intarur anulu s'.rass corrosion cracking produced by residual weld strassas is tne cause of this /ailure.
Further intpactinnt and ovaminations ara requirod to deten"ine the extent of repairs necessary prior to plant star'up.
Leakage observed was,inor weepaga, and 6*iic.asnitad in ne ralaase to the public.
417 360 Further details will te proyuled ;n the !,1 l o,,np. cre, t 1"
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