ML20072R362
| ML20072R362 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 03/29/1983 |
| 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, NUDOCS 8304050559 | |
| Download: ML20072R362 (2) | |
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TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II b
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BLRD-50-438/82-48 BLRD-50-439/82-43 c'
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Region II
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Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW Suite 2900 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - DEFICIENT STEAM GENERATOR SUPPORT BOLTS - BLRD-50-438/82-48, BLRD-50-439/82 THIRD INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector I
R. V. Crlenjak on July 23, 1982 in accordance with 10 CFR 50.55(e) as NCR 1887. This was followed by our interim reports dated August 19, and December 21, 1982. Enclosed is our third interim report. We expect to submit our next report on or about August 19, 1983 If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
t Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Ma ager Nuclear Licensing Enclosure cc (Enclosure):
Mr. Richard C. DeYoung, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
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An Equal Opportunity Employer
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 DEFICIENT STEAM GENERATOR SUPPORT BOLTS NCR 1887 BLRD-50-438/82-48, BLRD-50-439/82-43 10 CFR 50.55(e)
THIRD INTERIM REPORT Description of Deficiency Several two-inch diameter bolts manufactured from SA 540 GR B24 material by Lakeside Bridge and Steel which are used in the upper steam generator restraints appear to be deficient. The deficiency involves loss of tension in the bolts after they were torqued to sixty-five percent of their ultimate strength. The bolts are in metal to metal joints. The loss of tension was discovered during reinspection of the bolts.
Interim Progress The sample bolts, which were found loosened, were sent to TVA's Singleton Laboratory for testing and evaluation. Problems developed regarding the configuration of the testing devices which caused a delay in initial testing. The problems have been resolved and the bolts are currently being tested. This involves loading the bolts for a period of 120 days.
Results of these tests are expected to be provided in the next report.
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