ML20023E085
| ML20023E085 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 05/27/1983 |
| 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-1740, NRC-1740, NUDOCS 8306070188 | |
| Download: ML20023E085 (2) | |
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i TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374o1 400 Chestnut Street Tower II May 27, 1983 co 3c L*'
7-LO Ej BLRD-50-438/82-19 Y-3 no C,a) y y
U.S. Nuclear Regulatory Commission rn g
Region II 3
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Attn:
Mr. James P. O'Reilly, Regional Administrator
[
h 101 Marietta Street, NW
.p,.
Suite 2900 N
E' Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNIT 1 - DEFICIENT WELDOLETS ON NAVC0 SPOOL PIECES - BLRD-50 'l38/82 FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on February 24, 1982 in accordance with 10 CFR 50.55(e) as NCR 1740. This was followed by our interim reports dated March 24, June 23, and October 1, 1982 and February 3, 1983 Enclosed is our final report. TVA does not now consider the subject nonconforming condition
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adverse to the safe operation of the plant. Therefore, we will amend our records to delete the subject nonconformance as a 10 CFR 50.55(e) item.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Vsry truly yours, TENNESSEE VALLEY AUTHORITY
. M.' Mills, #4n ger i
Nuclear Licensing Enclosure cc (Enclosure):
l Mr. Richard C. DeYoung, Director Office of Inspection and Enforcement l
U.S. Nuclear Regulatory Comnission Washington, D.C.
20555 Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, GA 30339 8306070188 830527
'o]pICIAL COPY PDR ADOCK 05000438 S
PDR An Equal Opportunity Employer Mb
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNIT 1 DEFICIENT WELD 0LETS ON NAVC0 SPOOL PIECES NCR 1740 BLRD-50-438/82-19 10 CFR 50.55(e)
FINAL REPORT Description of Deficiency Five weldolets (WOLs) on spool pieces 1ND-196,1ND-198,1ND-200,1ND-202, and 1NV-242 exhibit welds that do not conform to the ASME Section III Subsection NB (for class 1 components) or Subsection NC (for class 2 components) requirements for fabrication. The welds are typically below flush 1/64 inch to 3/32 inch. In addition, a weld at the upper apex of a special thermowell boss on spool piece 1NV-241 was ground down below flush. The subject weldolets are installed in the Decay Heat Removal (ND)
System and Makeup and Purification (NV) System piping. The vendor on these items was National Valve and Manufacturing Company (NAVCO) of Pittsburgh, Pennsylvania.
Safety Implications NAVC0 performed calculations in accordance with the ASME and ANSI B31.1 piping codes to verify the amount of weld metal required betwecn WOLs and boss and pipe for all Bellefonte principal piping systems. The results of NAVCO's work indicates that some "underfill" is aco'eptable. TVA concurs with NAVCO's determination. As such, the subject WOLs have becu evaluated by the NAVC0 criteria and accepted for "use as is."
The weld which had been ground below flush at the upper apex of the thermcwell boss has been repaired by welding. TVA considers this grinding deficiency an isolated case which does not require recurrence control and which required only minor repair.
TVA initiated a WOL sampling progrcm to determine the scope of the i
problem. Five WOLs were inspected from each ASME Code System on which NAVC0 WOLs were used. On systems which utilized fewer than five WOLs, all WOLs used were inspected. All the WOLs which were inspected were found to be acceptable; therefore, as a result of this sampling, no generic problem exists. No conditions were identified as a result of this investigation which would have been adverse to safety if it had remained uncorrected.
Therefore, there are no safety implications to Bellefonte and TVA no longer considers this item to be reportable under 10 CFR 50.55(e).
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