ML20076J558
| ML20076J558 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 08/26/1983 |
| 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 8309070237 | |
| Download: ML20076J558 (2) | |
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TENNESSEE VALLE ORIT!Ygg,;
CHATTANOOGA. TENNESSEE $14Di s O F,la 400 Chestnut Street Tower II 2[,h8h2-s BLRD-50-438/83 BLRD-50-439/83-39 U.S. Nuclear Regulatory Cossaission Region II.
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 - INCORRECT MODELING OF PROBLEMS IN TPIPE - BLRD-50-438/83-47, BLRD-50-439/83 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector Linda Watson on August 1,1983 in accordance with 10 CFR 50.55(e) as NCR BLN CEB 8304. Er. closed is our first interim report. We expect to submit our next report by March 22, 1984.
If you have 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 f0FFICIM, d!i!!i 8309070237 830826 DR ADOCK 0500043 1983-TVA SOTH ANNIVERSARY An Equal Opportunity Employer
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ENCLOSURE BELLEFONTE NdCLEAR PLANT UNITS 1 AND 2 INCORRECT MODELING OF PROBLEMS IN TPIPE NCR BLN CEB 8304-BLRD-50-438/83-47, BLRD-50-439/83-39 10 CFR.50.55(e)
FIRST IMTERIM REPORT Description of Deficiency Isometric drawings for the reactor coolant (RC) drains, vents, and miscellaneous piping systems show that snubbers at nodal points 67 and 75 are to be 900 or perpendicular to the RC drain piping. The directions of supports at nodal points 67 and 75 of problems N4-1NK-C (unit.1) N4-2NK-C (unit 2) were not modeled in the TPIPE program consistent with the analysis isometric. Incorrect data using the snubbers skewed at 300 was input into TPIPE program which would affect the support ' design loads, the piping system movements and piping stresses.
Interim Progress TVA has requested Teledyne Engineering Services (TES) to reanalyze' the problem using the correct support alignment of 900 Any support redesign will be performed, if. necessary.
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