ML20042A983
| ML20042A983 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 03/14/1982 |
| From: | Vassallo D Office of Nuclear Reactor Regulation |
| To: | Pilant J NEBRASKA PUBLIC POWER DISTRICT |
| References | |
| NUDOCS 8203240358 | |
| Download: ML20042A983 (3) | |
Text
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Docket No. 50-298 g
MAR 141982 4
RECEIVED
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"%7 i Mr. J. M. Pflant, Director m*
Licensing & Quality Assurance c#
Nebraska Public Power District e
P.O. Box 499 A
g Columbus, Nebraska 68601
Dear Mr. Pilant:
We are in the process of reviewing the inservice inspection program for Cooper Nuclear Station. However, to complete our review, we need certain additional infomation pertaining to the relief requests contained in the enclosure. To complete our review in a timely manner, you are requested to respond within thirty days after receipt of this letter.
The request for information contained in this letter is specific to Cooper Nuclear Station; therefore, OMB clearance is not renuired under P.L.96-511.
Sincerely, ORIGINAL SIGNED BY Domenic B. Vassallo, Chief Operating Reactors Branch f2 Division of Licensing f
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Enclosure:
Request for Additional Infomation ec: w/ enclosure See next page Distribution +
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Mr. J..M. Pilant Nebraska Public Power District cc:
Mr. G. D. Watson, General Counsel Nebraska Public Power District P. O. Box 499 Columbus Nebraska. 68601 Mr. Arthur C. Gehr, Attorney Sr. ell & Wilmer 3100 Valley Center Phoenix, Arizona _ 85073
.Cooher Nuclear Station ATTN: Mr. L. Lessor Station Superintendent P. O. Box 98 Brownville, Nebraska 68321 Auburn Public Library 118 - 15th Street Auburn, Nebraska 68305 Mr. Dennis Dubois USNRC Residen+. Inspector P.O. Box 218 Brownville, NE 68321 John T. Collins Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011
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REQUEST FOR ADDITIONAL INFORMATION INSERVICE INSPECTION PROGRAM CooperNuclearStation(CNS) 1.
Program Interval Under the change in Regulation 10 CFR 50.55a effective Novemb'er 1, 1979, the ISI program, when finally approved, will cover the last 80 months of the c'urrent 10-year inspection interval i.e.', from November 1, 1977 to July 1, 1984 for CNS.
Does this result in any changes NPPD wishes to make in the relief requests? Does NPPD require other ISI relief?
2.
No. C.1. (Ref. 1)'; Relie'f Recuest re. Class 1 Pumps CategoryB-L-2,itemB5.7requiresvisualexamina5ionoftheinternal pressure boundary surfaces of one pump. NPPD requests relief as examination is impractical. The following additional information is requested:
(a) What is the technical justification for code relief?
(b) Has ultrasonic wall thickness measurement been considered as an alternate examination method?
(c) What are the manufacturer's recommendations regarding the disassembly of the pumps for regular maintenance?
(d) Based on the industry' experience with the pumps, what is the likelihood
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that the CNS plant will operate ten years without at least one pump being disassembled for maintenance?
3.
No. C.1 (Ref.1); Reli,ef Request re. Class 1 Valves Exceeding 4-Inches Category B-M-2, item B6.7 requires visual examination of the internal pressure boundary surfaces of valves.
NPPD requests relief as examination is impractical. The following additional information is requested:
(a) What is the technical justification for code relief?
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(b) Has ultrasonic wall thickness measurement been considered as an alternate examination method?
REFERENCE:
- 1. J. N. Pilant (NPPD) to D. K. Davis (HRC), " Inservice Inspection and Testing Program", July 29, 1977
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