ML20210T771
| ML20210T771 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 09/26/1986 |
| From: | Gucwa L GEORGIA POWER CO. |
| To: | Muller D Office of Nuclear Reactor Regulation |
| References | |
| 0774C, 774C, SL-1335, TAC-62029, NUDOCS 8610090189 | |
| Download: ML20210T771 (2) | |
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Georgia Power Company 333 Piedmont Avenue Atlanta. Georgia 30308 Telephone 404 526 6526 Mailing Address:
Post Office Box 4545 Alianta, Georgia 30302 Georgia Power 7
the southom etccinc sy< tem Manager Nuclear Safety and Licensing SL-1335 0774C September 26, 1986 Director of Nuclear Reactor Regulation Attention: Mr. D. Muller, Project Director BWR Project Directorate No. 2 Division of Boiling Water Reactor Licensing U. S. Nuclear Regulatory Commission Washington, D. C.
20555 NRC DOCKET 50-366 OPERATING LICENSE NPF-5 EDWIN I. HATCH NUCLEAR PLANT UNIT 2 ADDITIONAL INFORMATION IN REGARD TO REQUEST TO REVISE SETPOINTS FOR CERTAIN ANALOG TRANSMIIIER TRIP SY5ItM INSTRUMENTS Gentlemen:
Georgia Power Company's (GPC) l etter of July 18, 1986 requested Technical Specifications changes for Plant Hatch Unit 2 to support replacement of analog transmitters with transmitters of a different type.
This letter provides additional information in regard to that submittal and is provided in response to an NRC verbal request by Messrs.
G. Rivenbark and T. Collins.
Change 4 (Enclosure 1) of the subject GPC letter proposes to lower the allowable value for the RHR-LPCI and core spray low reactor pressure permissives, which open the injection valves, from 422 psig to 390 psig.
General Electric has provided a report, MDE-263-1185 (Appendix A to of the subject letter) specifying that the change to the low pressure injection permissive would not have a "significant" effect on peak clad temperature (PCT) for the Ifmiting design basis accident.
Since PCTs for certain fuel types and exposures are presently at or near the 22000F,10 CFR Part 50, Appendix K limit, GPC was requested by NRC to provide clarification that the proposed change would result in the 0
calculated limiting PCT remaining at or below 2200 F, when calculated pursuant to approved Appendix K models.
GPC has requested and received documentation to this effect from General Electric Company.
8610090189 860926 PDR ADOCK 05000366
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6 GeorgiaPower d Director of Nuclear Reactor Regulation Attention: Mr. D. Muller, Project Director BWR Project Directorate No. 2 September 26, 1986 Page Two General Electric has provided that "not significant", as defined on pages 9 and 11 of MDE-263-1185, means that the calculated MAPLHGR limits for Plant Hatch Unit 2 would not change and the calculated limiting PCT would remain at or below 22000F.
If you desire further information, please contact this office.
Sincerely, gd'r h L. T. Gucwa REB /lc c: Georgia Power Company U.S. Nuclear Regulatory Commission Mr. J. P. O'Reilly Dr. J. N. Grace, Regional Administrator Mr. J. T. Beckham, Jr.
Mr. Pete Holmes-Ray, Senior Resident Mr. H. C. Nix, Jr.
Inspector - Hatch GO-NORMS 0774C rwns
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