ML20070E242

Fourth Interim Deficiency Rept Re Improper Use of Foam Plastic Installation on Stainless Steel Pipe.Initially Reported on 820203.Instruction Memo Re Insulation Types & Drawings Revised.Next Rept Expected by 830321

ML20070E242
Person / Time
Site:	Bellefonte
Issue date:	12/10/1982
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 8212170157
Download: ML20070E242 (2)

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,o TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II December 10, 1982 BLE-50-438/82-14 BLRD-50-439/82-14 3

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U.S. Nuclear Regulatory Commission 1.

7 Region II P

Attn:

Mr. James P. O'Reilly, Regional Administrator

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101 Marietta Street, Suite 3100 h

Atlanta, Georgia 30303 C.

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 FOURTH INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Celenjak 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, and September 7, 1982. Enclosed is our fourth interim report,. We expect to submit our next report by March 21, 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

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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 Ut FICIAL COPY 8212170157 821210 CgA PDR ADOCK 05000430 S

PDR An Equal Opportunity Employer

a ENCLOGURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 IMPROPER USE OF FOAM PLASTIC INSULATION ON STAINLESS STEEL PIPE NCR BLN BLP 8203 BLRD-50-438/82-14, BLRD-50-439/82-14 10 CFR 50.55(e)

FOURTH INTERIM REPORT Description of Deficiency During the process of a design review, a deficiency was discovered in the use of foam 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 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 TVA 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 drawings, seismic analysis modes, and pipe insulation procurement drawings.

Accordingly, some drawings were released incorrectly calling for the foam plastic insulation on stainless steel pipe. This deficiency is applicable only to Bellefonte Nuclear Plant. The material has been procured, but none has been installed.

Interim Progress TVA has proceeded with a revision to the instruction memorandum to indicate types of insulation compatible with Regulatory Guide 1 36. A similar revision to the mechanical design guide is prcgressing.

Revised pipe insulation drawings, seismic analysis modes, and procurement drawings have been issued. Other affected drawings are being revised to comply with the revised instructions in accordance with engineering change notice (ECN) 1396.

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