ML20098A329
| ML20098A329 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 08/28/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8409240445 | |
| Download: ML20098A329 (2) | |
Text
l c..a PRP TENNESSEE VALLEY AUTHORITY OFFICIAL'COPV CH ATTANOOGA. TENNESSEE 374of 400 Chestnut Street Tower II BLRD-50-438/84-43 BLRD-50-439/84-39 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - DEFICIENCY IN OVERLAP MODELING TECHNIQUES - BLRD-50-438/84-43, BLRD-50-439/84 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on August 1, 1984 in accordance with 10 CFR 50.55(e) as NCR BLN CEB 8412. Enclosed is our first interim report. We expect to submit our next report on or about Marc'1 15, 1985.
If you h' ave any questions, 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 cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Records Center (Enclosure)
Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 84092%
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An Equal Opportunity Employer
ENCLOSURE
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BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2
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DEFICIENCY IN OVERLAP MODELING TECHNIQUES NCR BLN CEB 8412 BLRD-50-438/84-43, BLRD-50-439/84-39
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10 CFR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency TVA has identified that the Bellefonte Nuclear Plant (BLN) MA-3 Rigorous Analysis Handbook (RAH) was deficient in overlap modeling techniques before March 15,1984. The seismic response spectra of two or more problems being overlapped were rot required by the BLN RAH to be enveloped. Additionally, support loads in the overlao region were not increased by 10 percent.
. Interim Progress TVA is in the process of reviewing piping analysis problems with overlap.
Further information will be provided in our next report on this item.
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