ML20028D232
| ML20028D232 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 01/10/1983 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55C, 10CFR-50.55E, NCR-1888, NUDOCS 8301170250 | |
| Download: ML20028D232 (2) | |
Text
>*
TENNESSEE VALLEY AUTHORITY CH AT TA NOOG A TENNr%SEE 37401 400 Chestnut Street Tower II January 10, 1983 BLRD-50-438/82-49
,~
BLHD-50-439/82-44 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, Suite 3100 cc Atlanta, Georgia 30303 rr
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - UNDERSIZED FILLET WELDS MADE BEFORE MID-1980 - BLRD-50-438/82-49, BLRD-50-439/82 SECOND INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on July 22, 1982 in accordance with 10 CFR 50.55(e) as NCR 1888. This was followed by our first interim report dated August 23, 1982. Since that time, related NCR 1968 has also been determined to be reportable in accordance with 10 CFR 50.55(e). Enclosed is our second interim report. We expect to submit our next report by May 3,1983 If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY
[,
L. M. Mills, Manager Nuclear Licensing Enclosure ec:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 g Yl8 A h 5 g y,'
V' B301170250 830110 yb PDR ADOCK 05000439 S
PDR Antaae cemyt eat-o
o ENCLOSURE l
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 UNDERSIZED FILLET WELDS MADE BEFORE MID-1980 NCR 1888 BLRD-50-438/82-49, BLRD-50-439/82-44 10 CFR 50.55(e)
SECOND INTERIM REPORT l
Description of Deficiency i
Investigations performed, as required by NCR 1173, have disclosed evidence that some of the 1/4 inch and larger fillet welds required on electrical cable tray supports, HVAC duct supports and other miscellaneous structural features are undersized where visual inspections were made before mid-1980. The cause of this deficiency can be attributed to craftsmen and inspectors not possessing fillet weld gauges to aid in the determination of the proper size of the fillet welds. The use of fillet weld gauges would have provided proper pre-inspection feedback to the craftsmen as to the adequacy of weld size (NCR 1968) and would have allowed the inspector to perform a proper inspection (NCR 1888). Similar deficiencies involving undersized welds have been documented and reported as 10 CFR 50.55(e) items per NCas 1173, 1188, 1203, and 1563 After mid-1980, the conditions described above do not exist because of improvements in TVA's quality assurance program for weld inspection. One reason for this was the creation of intensified training and certification programs relating to the visual inspection of welds.
In addition to this, since mid-1980 TVA's attention has been focused to assuring that all weld fabricated structures are erected and inspected to exact drawing and specification requirements.
Interim Progress TVA has identified all features and welds under the scope of this deficiency. TVA is continuing to inspect welds for fillet size, and the results are being forwarded for engineering evaluation and disposition regarding "use-as-is" or rework. This information will be forwarded on a continuing systematic basis until all areas under the scope of this deficiency have been evaluated and dispositioned.
Recurrence control for this deficiency has been previously implemented based upon:
1.
Visual QA certification of all welding QC inspectors accomplished September through October 1981, 2.
Results of visual inspection audits being performed on a continuing basis in accordance with site procedure BNP-SOP-716 (implemented 5-14-81) have indicated that inspectors are accurately checking fillet welds.
3 Site policy of providing craftsmen and QC inspectors with fillet weld gauges since July 1980.
,y
.y,ye._.
_ _ _ _.