ML20079L436
| ML20079L436 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 02/16/1983 |
| 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 8302230330 | |
| Download: ML20079L436 (2) | |
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TENNESSEE VALLEY AUTHORITY J
CH ATTANOOGA. TENNESSEE 374o1 400 Chestnut Street Tower II sa February 16, 1983 o
BLRD-50-438/82-71 BLRD-50-439/82-65 U.S. Nuclear Regulatory Comission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator et' 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - UMDERDESIGNED SNUBBER ON MAIN FEEDWATER PIPING IN VALVE ROOM B - BLRD-50-438/82-71, BLRD-50-439/82 SECOND INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector K. Landis on October 13, 1982 in accordance with 10 CFR 50.55(e) as NCR BLN CEB 8214. This was followed by our first interim report dated November 10, 1982. Enclosed is our second interim report. We expect to submit our next report by May 27, 1983 If you have any questions, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY
. M. Mills, Manager Nuclear Licensing Enclosure Mr. Richard C. DeYoung, Director (Enclosure) cc:
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 8302230330 830216 OFF W LCOPY -
An Equal Opportunity Employer Y A
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 UNDERDESIGNED SNUBBER ON MAIN FEEDWATER PIPING IN VALVE ROOM B BLRD-50-438/82-71, BLRD-50-439/82-65 NCR BLN CEB 8214 10 CFR 50.55(e)
SECOND INTERIM REPORT Description of Deficiency A snubber on the main feedwater piping in valve room B, shown on isometric drawing 1 AWO501-CF-B1 at node 5, is underdesigned'. The calculated loads (analysis problems N4-1CF-B and N4-2CF-B) at node 5 i
are low because a snubber was placed on a valve operator at node 25 which apparently added restraint to the piping. The snubber at node 25 if required, should not provide significant restraint to the piping.
Interim Progress TVA is still in the process of documenting the completed analysis and reviewing the rigorous analysis problems to identify snubbers placed on valve operators with a restraint component along the axis of the pipe.
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