ML19209A755
| ML19209A755 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 08/13/1979 |
| From: | Fiorelli G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Davidson D CLEVELAND ELECTRIC ILLUMINATING CO. |
| Shared Package | |
| ML19209A756 | List: |
| References | |
| NUDOCS 7910050335 | |
| Download: ML19209A755 (1) | |
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Docket No. 50-440 Docket No. 50-441 The Cleveland Electric Illuminating Company ATTNt Dalwyn R. Davidson Vice President - Engineering P. O. Box 5000 Cleveland, OH 44101 Gentlemen:
Thank you for your interim report dated July 18, 1979, pursuant to 10 CFR 50.55(e) regarding Rockbestoc cable jacket. We will complete our review of this matter during a future inspection after receipt of your finsi report.
Your cooperation with us is appreci.ted.
Sincerely, G. F orelli, Chief Recctor Construction and Engineering Support Branch cc: Central Files Reproduction Unit NRC 20b PDR Local PDR NSIC TIC Harold W. Kohn, Ohio Power Siting Commission Mr. Daniel D. Wilt, Attorney 7910050335 1126 186
Jan THE CLEVELAND ELECTRIC ILLUMIN ATING COMPANY ILLUMINATING SLOG e PUSUC 500ARE e CLivtLAND. OMIO 44101 e TELEPHONE (216) 8231350 m MAIL ADDktSS: P.O BOX 6000 Semng The Best Location in the Nation Delwyn R. Davidsen VICE PatSID(NT. ENGINEERING July 18, 1979 Mr. James Keppler Director, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Coc:=ission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Re: Perry Nuclear Power Plant Interim Report on Rockbestos Cable Jacket
Dear Mr. Keppler:
This letter is an interim report as required by 10 CFR 50 55(e) m the deficiency concerning Rockbestos Ccepany cable. This item was first discussed in a telephone conversation between Mr. M. R. Edelman of the Cleveland Electric Illuminating Ccepany and Mr. Jim Konklin of the NRC Region III, Office of Inspection and Enforcement on June 27, 1979 Description of Deficiency RocAbestos Co. was contracted by the Cleveland Electric Illuminati. g "o. to manufacture small power and control cable for Perry Nuclear Power Plant. After receipt of the cable it was discovered that the cable's hypalon Jacket was eccentrisic and at times fell below the 80% tolerance required in our speci-fication through IPCEA standard S-66-516.
A sampling of the cable received revealed that approximately 6% of the reels of cable sampled contained cable which did not meet the specification requirements. Readings as low as 62% of jacket thickness were recorded. As a result there is some concern that the cable jacket will not be able to fulfill its intended function (to contain and protect the individual conductors) and that incipient faults could occur.
Since it is felt that such a fault could adversely affect the safe operation or shutdown of the nuclear power plant, extensive evaluation or extensive repair will be required to establish the adequacy of the cable jacket to perform its intended safety function. At present, the Rockbestos Co. is pro-posing to conduct worst case pull test utilizing cable with jacket as low as 50% of specified thickness. These tests are scheduled to be conducted the week of August 13, 1979 y n, 2,'T 1979 1126 187
Mr. James Keppler July 18,1979 Upon receipt of the worst case test results, an evaluation of the results will be conducted. The results of this evaluation will be described in a final re-port to be forwarded to your office by September 28, 1979 Very truly yours, 64
'1 rs Dal R. Davidson Vice President-System Engineering
& Construction DRD:jl cc: Victor Stello, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C.
20555 1126 188
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