ML20049A407
| ML20049A407 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 01/16/1981 |
| From: | Kemper T PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, QUAL-2-10-2-(SD, NUDOCS 8101260500 | |
| Download: ML20049A407 (2) | |
Text
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a PHILADELPHIA ELECTRIC COMPANY 23O1 MARKET STREET P.O. BOX 8699 PHILADELPHIA. PA.19101 JAN 7 51981
'2isi ea,.a so 2
,o ~,. s. o m.
W IC E -PR ESID E NT aseeense messe Aeso messmaces Mr. Boyce Crier, Director Office of Inspection and T.cforcement, e.neion I t.*nited States ' uc le a r 'le gula tory Commis sion W1 Park Avenue Eing of Prussia, PA 19406 S ub j e c t,:
Interia Xeport For Possible Significant e
%=ficiency Deficiency ': o. 27 - Improper 'ielding of
eactor ?ressure 7essel Safe Ends 1ireerick. Generating Station, Units 1 and 2
'IRC Construction Tornit '!c s. C P ? . - 10 6, -107 3aferpace:
Telecon of 3eceicer 13, 1910 3.
L.
~4sitere
( P '.C O ) to J.
Mattia ("?C)
File:
OUAL 0-10-2 C D.3
? 7,)
' ear :fr. Grier-In compliance with 10C7P50.35(e) ve are hereby submittiac this interim report on the subject velding.
Philsdelohia 71ectric Company discussed this subject with vour office by telecon on December 16, 19S0 after it was determined that this situation may be reportable to the USNRC.
on December 17, 1980, Philadelntia riectric Coapany became aware that certain velds between the reactor pressure vessel
~
aossles and the reactor pressure vessel safe ends were welded using welding practices which deviated from the approved Installation Procedures.
- his welding practice involved aking partis 1 veld saases without feeding veld material (wash pass). followed by strav or mist application of water to accelerate the cooling process and thereby facilitating slignment.
It has been determined that on five welds this practice was definitely used.
There is a possibility that this has occurred on up to thirty-five other Unit 1 and Unit 2 RFV safe end to RPY nossle welds.
30/'/
5 lD 810126 0 W y
5
/
d
. Upon identification of the subject deficiency, the following actions were taken:
All welding of the RPY safe ends to RPV was stopped.
The valders and the subcontractor's personnel were interviewed to determine the extent of the problem.
^3 3,confaruance 7 sports vare writt:a to ifantify the conjitivue.
Ap"-opriate li.icirfinary actions ac50 taken against the individual responsibla for directin7 the veliing.
The inspection roc?!ures vere revis-d to estiblish a ouslity control oli ?siat for all futuro control of wel lin g used to schieve.ilitanent.
General Electric Coupany, the '73 3 S supolier,has been requestod to 'crfor, anslysis of t h <, accentability of the valds in question.
- t is ataceted that "<neral .netric 9 n 9 n.1 r v "L.1 1 have cou'leted their avslustion
'uri,7
~53 month o' ' Stus'ev.
e detertinatiren if t 'i e need for idditional a n..- 1,3 : 1.3, s s e r ests shoulf Se c on n l e t e:! durine the month n'
" arch.
It is estimated that P"C0 vill submit e.etailed written final report by April 13, 1931.
Sin 4erely, t
,/~_
cc:
Director of Inspection and Inforcements
ulted States '!uclear Regulatory Cornission
'Ja a h in g t o n,
D.C.
10555 f/
s 1
s
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