ML20028E000
| ML20028E000 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 01/13/1983 |
| 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 8301200228 | |
| Download: ML20028E000 (2) | |
Text
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA TENNESSEE 37401 400 Chestnut Street Tower II January 13, 1983 w
BLRD-50-438/82-47 BLRD-50-439/82-42 U.S. Nuclear Regulatory Commission c-Region II
~-~
Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, Suite 3100 7
Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - EMBEDDED PIPING WITH CRUSHABLE INSULATION - BLRD-50-438/82-47, BLRD-50-439/82 SECOND INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector J. D. Wilcox on June 29, 1982 jn accordance with 10 CFR 50.55(e) as NCR BLN CEB 8209. This was followed by our first interim report dated July 29, 1982. Enclosed is our second interim report. We expect to submit our next report by March 31, 1983 If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY m
I, L. M. Mills, nager Nuclear Licensing Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
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0301200228 830113 PDR ADOCK 05000430 S
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 EMBEDDED PIPING WITH CRUSHABLE INSULATION-NCR BLN CEB 8209 BLRD-50-438/82-47, BLRD-50-439/82-42 10.CFR 50.55(e)
SECOND INTERIM REPORT Description of Deficiency Essential Raw Cooling Water piping analysis problems N4-0KE-P, N4-1KE-F, and N4-2KE-F were analyzed assuming the 36-inch pipe to be embedded in concrete at four locations. Therefore, the analysis assumption was that the pipe was "cnchored" at the four locations. Actually, the 36-inch pipe has 3 inches of insulation covering in the area of embedment and, since the insulation may crush, the pipe is not truly " anchored" at the four locations. Therefore, the analysis is unconservative and must be redone assuming only " limited restraint" rather than " anchors" at the four locations.
Interim Progress The final analysis on problem N4-0KE-P has been performed using limited restraints at the two locations where the pipe extends into the yard. No rerouting of piping. was required, but one support was added to the line.
On problems N4-1KE-F and N4-2KE-K, the analysis is now being revised (changing valve weights and modeling of 36-inch pipe extending into the yard).
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