ML20108C003
| ML20108C003 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 10/22/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8411160322 | |
| Download: ML20108C003 (2) | |
Text
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TENNESSEQ,gLEY- AUTHORITY.
CHATTAM .j$s NN SESMy1 400ChestnutStiEe#E9dMft.II 84 BCT25 P)tober 22,1984
, BLRD-50-438/82 BLRD-50-439/82-14
$l U.S. Nuclear Regulatory Commission
-Region II Atta: Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW,' Suite 2900 Atlanta, Georgia 30323
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - IMPROPER USE OF FOAM PLASTIC INSULATION ON STAINLESS STEEL PIPE - BLRD-50-438/82-14, BLRD-50-439/82 SEVENTH INTERIM REPORT The subject deficiency was initially reported to NRC-OIE Inspector R. V. Crlenjak on February 3,1982 in accordance with 10 CFR 50.55(e) as NCR BLN.BLP 8203 This was followed by our interim reports dated March 5, June 1, September 7 and December 10, 1982 and March 21 and September 15, 1983 Enclosed is our seventh interim report. We expect to submit our next report by June 19, 1985.
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 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 Opt, rations 1100 circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 0
84d1 h B ~ OFFICIAL COPY An Equal Opportunity Employer Te77r 1 I
, l ENCLOSURE
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l BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 IMPROPER USE OF FOAM PLASTIC INSULATION ON STAINLESS STEEL PIPE NCR BLN BLP 8203 1 BLRD-50-438/82-14, BLRD-50-439/82-14 10 CFR 50.55(e)
SEVENTH INTERIM REPORT Description of Deficiency During the process of a design review, a deficiency was discovered in the use of roam plastic insulation on stainless steel pipe. Foam plastic insulation cannot be purchased to. meet the requirements for chloride and fluoride content for use on stainless steel pipe as defined by Regulatory l Guide 1 36.
This deficiency resulted from the use of two instructional documents by designers which specify foam plastic insulation to be used on cold water piping without distinction to stainless steel (refer to memorandum from R.
G. Pratt to Bellefonte Design Project Files dated October 20, 1978, "Bellefonte Nuclear Plant Pipe Insulation" and Mechanical Design Guide DG-M18.9.1 R1). The designers used these documents in preparing pipe insulation dra41ngs, seismic analysis modes, and pipe insulation . .
procurement drawings. Accordingly, some drawings were released incorrectly calling for the foam plastic insulation on stainless steel pipe.
Interim Progress TVA's Office of Engineering (OE) has revised the instructional memorandum to indicate the types of insulation compatible with Regulatory Guide 1.36.
A similar revision to the mechanical design guide is complete. Revised pipe insulation drawings, seismic analysis modes, and procurement drawings have been issued. Seismic analysis drawings are being revised by design change request (DCR) 2195 in accordance with engineering change notice (ECN) 1396.
The seismic analyses for this deficiency are in process and supports are to be redesigned. A final report on this item will be submitted when the design rework is complete.
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