ML20039E081
| ML20039E081 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 12/30/1981 |
| 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 8201060508 | |
| Download: ML20039E081 (2) | |
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TENNESSEE VAgY HORITY CH ATTANOOG A) TENTCSSQ, y Q1' 400 Chestnut Street Tower II' D E Be%mhea y e981 BLRD-50-438/81-77 BLRD-50-439/81-76 Mr. James P. O'Reilly, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region II - Suite 3100 101 Marietta Street Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONT3 NUCLEAR PLANT UNITS 1 AND 2 - ALLOWABLE STRESSES FOR PIPE SUPPORT DESIGN - BLRD-50-438/81-77, BLRD-50-439/81 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on December 7, 1981 in accordance with 10 CFR 50.55(e) as NCR BLN CEB 8110. Enclosed is our first interim report. We expect to submit our next report by May 14, 1982.
If yo2 have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY
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g-o m - 4 L. M. Mills, Manager Nuclear Regulation and Safety V
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Mr. Richard C. DeYoung, Director (Enclosure) sy G
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a ENCLOSURE A
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 ALLOWABLE STRESSES FOR PIPE SUPPORT DESIGN BLRD-50-438/81-77, BLRD-50-439/81-76
FIRST INTERIM REPORT-Description of Deficiency
- For the upset: condition for primary load sources, the Bellefonte FSAR 1-indicates that allowable stresses for support designs is 1.0 times the normal condition AISC allowable stresses.- The procedures governing-Bellefonte piping analysis indicate that a factor. of 1.33 can be used.
The factor of 133 was used in 0asign. of pipe supports.
Interim Progress
. TVA is investigating in-depth the allowable stresses being.used for allc
' loading conditions at Bellefonte, to determine.if the subject condition witl have a:significant safety impact.- Design of other TVA plants are being investigated for 'similar discrepancies, i
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