ML20214W968
| ML20214W968 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 09/24/1986 |
| From: | Leblond P COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 2152K, NUDOCS 8610030282 | |
| Download: ML20214W968 (2) | |
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One First Nabonal Plaza. CNcago, Illinois f Address Reply to: Poet Omco Box 767 N/ CNcago, Illinois 60600 0767 September 24, 1986 Mr. Harold R. Denton U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, DC.
20555
Subject:
Zion Nuclear Power Station Units 1 and 2 Proposed Amendment to DPR-39 and DPR-48 Steam Generator Tube Sleeving NRC Docket Nos. 50-295 and 50-304 i
References (a): April 24, 1986 letter from P. C. LeBlond to H. R. Denton.
(b): June 16, 1986 letter from P. C. LeBlond to H. R. Denton.
(c): September 2, 1986 letter from P. C. LeBlond to H. R. Denton.
Dear Mr. Denton:
Reference (a) transmitted a proposed amendment to Facility Operating License Nos. DPR-39 and DPR-48, Appendix A, Section 4.3, Reactor Coolant System. That change would allow Zion's steam generator tubes to be repaired by sleeving. Reference (b) provided a description of the specific sleeving methodology to be utilized at Zion Station. Reference (c) provided a revision to the proposed change to incorporate requirements on both the inspection of sleeves and a specific reference to Combustion Engineering, Inc., Report No. CEN-331-P, Revision 1-P.
This submittal is documenting the results of a teleconference held on September 18, 1986 between Commonwealth Edison personnel and Mr. J. A. Norris, along with other members of your staff. of reference (c) provided a complete set of revised Technical Specification pages. Page 74f contained the proposed definition for " Plugging and Repair Limit". Commonwealth Edison Company has agreed to a clarification of this definition. This clarification does not alter the intent of the original definition transmitted with reference (c).
The revised Section 4.3.1.B.4.6.a will read as follows; a) for the area in the upper weld joint, any imperfection produced by degradation shall be plugged unless it can be clearly demonstrated by a qualified NDE technique that the imperfection is < 33% of the nominal wall thickness for I.D. imperfections or<.40% thickness of the tube for O.D. imperfections.
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Mr. H. R. Denton September 24, 1986 In addition, Commonwealth Edison Company agrees to provide the NRC with the results of additional investigative work to be performed regarding the detectability threshold for simulated imperfections in the sleeve / tube combination. This will include work performed in the sleeve joint region.
If any questions arise regarding this matter, please direct them to this office.
Very truly yours, P. C. LeBlond Nuclear Licensing Administrator in cc: Resident Inspector - Zion J. A. Norris 2152K