ML20083D608
| ML20083D608 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 12/15/1983 |
| From: | Tucker H DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, SD-414-82-25, SD-414-82-25E, NUDOCS 8312280161 | |
| Download: ML20083D608 (2) | |
Text
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l DUKE POWEn GOMPANY l
P.O. IsOx 33180 l
CllAHLO1"rE, N.O. 28242 f
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Mr. James P. O'Reilly, Regional Administrator i
l U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303 Re: Catawbs. Nuclear Station Unit 2 Docket No. 50-414 j
Dear Mr. O'Reilly:
Pursuant to 10 CFR 50.55e, please find attached a supplement to Significant f
Deficiency Report SD 414/82-25.
i Very truly yours, l
3 ML k-l Eal B. Tucker l
l LTP/php i
Attachment cc: Director INFO Records Center Office of Inspection & Enforcement Suite 1500 U. S. Nuclear Regulatory Commission 1100 circle 75 Parkway Washington, D. C. 20555 Atlanta, Georgia 30339 NRC Resident Inspector Mr. Robert Guild, Esq.
Catawba Nuclear Station Attorney-at-Law P. O. Box 12097 Palmetto Alliance Charleston, South Carolina 29412 2135 Devine Street Columbia, South Carolina 29205
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B312280161 831215 h2 PDR ADOCK 05000414 S
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JP0/HBT/LTP December 15, 1983 Duke Power Company Catawba Nuclear Station Report Number: SD 414/82-25, Supplemental Response Report Date: December 15, 1983 Facility: Catawba Nuclear Station Unit 2 The following is a supplement to the corrective action as described in the
. initial report of January 28, 1983 and final report of September 2, 1983.
- 1) A communication error resulted in one Class 3 open butt weld by Welder M59 being radiographed during the radiographic investigation to determine the extent of Welder #600's lack of penetration problem.
This weld was found to have lack of penetracion in isolated areas.
An additional fifteen (15) of M59's Class 3 open butt welds were selected at random and radiographed. Only 4.3% of this weld length had any lack of penetration. Most of this was minor (less than.030" in depth). The largest indications of lack of penetration by M59 were evaluated by Design, Construction and QA and were found to be insignificant.
- 2) A review of Class 3 open butt root passes, made accessible for I.D.
inspection by an adjacent cut out, was conducted in 1982. This revealed only one (1) occurrence of lack of penetration being documented during the period January 1, 1982 to December 31, 1982.
The welds that were cut out were made originally at various times dating back to the early stages of our construction (1976-1977).
The one (1) occurrence documented (NCI 14468) was of a minor nature.
QA Procedure M-4 presently requires visual inspection of all Class 1, 2, and 3 weld root passes made visually accessible by an adjacent cut out.
Discrepancy Reports (R-2As) are generated on root problems when identified. This inspection / trending will continue throughout the construction phase.
- 3) A Construction Procedure (CP-823) has been generated for the Welding Superintendent to use as an administrative tool in assuring complete penetration on Class 3 welds. Periodically, randomly selected Class 3 open butt closure welds are radiographed. Duke Power Company's Level III Inspector evaluates these radiographs and forwards his evaluation to the Welding Superintendent.
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