ML20113E582
| ML20113E582 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 03/19/1985 |
| From: | Hufham J TENNESSEE VALLEY AUTHORITY |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8504160531 | |
| Download: ML20113E582 (2) | |
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+ ' *.o TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374o1 400 Chestnut Street Tower II N Ml? 2 Sarah /19 g985 5
- BLRD-50-43 8/84-43 BLRD-50-439/84-39 U.S. Nuclear Regulatory Cmmission Region II Attn:
Dr. J. Nelson Grace, Regioral Adninistrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323
Dear Dr. Grace:
BELLEFWTE NUCLEAR PLANT UNITS 1 AND 2 - DEFICIENCY IN OVERLAP EDELING TECHNIQUES - BLRD-50-43 8/84-43, BLRD-50-439/84 SECOND INTERIM REPORT The subject deficiency was initially reporte:1 to NRC-0IE Inspector P. E. Fredrickson on August 1, 1984 in accordance with 10 TR 50.55(e) as NCR BLN GB 8412.
This was followed by our interim report dated August 28, 1984.
Enclmed is our second interim report. We expect to sutxnit our next report' on & about April 1, 1986.
If you have any questions, please got in touch with R. H. Shell at FTS 858-2688.
Very truly yours,
TENNESSEE VALLEY AUTHORITY e
- d. W. Hufham, Manager Licensing and Regulations Encimure cc:
Mr. James Taylor, Director (Enclmure)
Office of Inspection and. Enforcement U.S. Nuclear Regulatory Camission Washington, D.C.
20555 Records Center (Encimure)
Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 D
S-i An Equal Opportunity Employer '
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ENCLOSURE
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BELLEFCNTE NUCLEAR PLANT UNITS 1 AND 2 DCFICIENCY IN OVERLAP IODELING TECHNIQJES NCR BLN GB 8412 BLRD-50-438/84-43, BLRD-50-439/84-39 10 TR 50.55(e)
SECOND 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 not required by the BLN RAH to be enveloped. Additionally, support loads in the overlap region were rot increased by 10 percent.
Interim Progress TVA is still in the process of reviewing piping aralysis probles with overlap.
Further information will be provided in our next report on this itm.
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