ML20009F471
| ML20009F471 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 06/09/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NCR-1267, NUDOCS 8107310205 | |
| Download: ML20009F471 (2) | |
Text
-
INFICTAL COP 4 TENNESSEE _ VALLEY AUTHORITY m.
CH ATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II
- i.
3 0
-m c"' O
' June 9, 1981
- f.g<
4 gg gj sj
(.!< hJp d o - 0.RT-e 3 4 /
NLdllL)</{L
\\
/t N gymuress j.} j
- 0 1981 Mr. James P. O'Reilly, Director Office of Inspection and Enforcement A
U.S. Nuclear Regulatory Commission 7
Region II - Suite 3100
- 'w,,,. 4 gf 101 Marietta Street Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - SOCKET WELD MISALIGNMENT ON ESSENTIAL AIR SYSTEM WELDS - NCR 1267 - FOURTH INTERIM REPORT The subject nonconformance was initially reported to NRC-0IE Inspector R. W. Wright on ?eptember 30, 1980, in accordance with 10 CFR Part 50.55(e). This was followed by our interim reports dated October 29 and December 16, 1980, and February 11, 1981. Enclosed is our fourth interim report. We expect to submit our next written report by September 1,1981.
If you have any questions concerning this matter, please get in touch with D. L. Lambert at FTS 857-2581.
Very truly yours, TENNESSEE VALLEY AUTHORITY L ht nt A S OS A L. M. Mills, Manager Nuclear Regulation and Safety i
Enclosure cc:
Mr. Victor Stello, Jr., Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 srb 8107310205 810609 PDR ADOCK C5000438 S
PDR I
=~
ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 SOCKET WELD MISALIGNMENT ON ESSENTIAL AIR SYSTEM WELDS NCR 1267 10 CFR 50.55(e)
FOURTH INTERIM REPORT Description of Deficiency Approximately 13 of 21 eocket welds in the Essential Air Systen piping surveyed by nondestructive examination (NDE) apparently failed to meet TVA welding specifications and procedures (G-29M, drawing 1.M,1.2-11 R1) relative to minimum pipe to socket fitting engagement requirements. Further investigation revealed that 20 percent of approximately 100 socket welds in various other systems surveyed also failed to meet the same specifications.
Interim Progress TVA has determined that the welds in question are structurally usable as is because the insertion depth of the piping into the socket does not affect the strength of the weld. However, TVA is still in the process of reviewing the subject deficiency to determine further corrective actions.
.N.
. _ - -