ML20099K232
| ML20099K232 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim, 05000000 |
| Issue date: | 03/19/1976 |
| From: | Andognini G BOSTON EDISON CO. |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20099K024 | List: |
| References | |
| FOIA-84-105 NUDOCS 8411290356 | |
| Download: ML20099K232 (2) | |
Text
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BOSTON EDISCN CCMPANY Cc-e=46 Car. css s:c Bonsro= Sv=asr B = sT c s. Massa %scr?s c2199 March 19, 1976
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- ta Director of Nuclear Reactor Regulation ATTN:
D. L. Ziemann, Chief Operating Reactors Branch 12 Division of Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulator Commission Washington, D. C.
20555
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Docket No. 50-293 License No. D?R-35 NRC Questions on Pilgrim I Reload 2 and Single Loop Operation Submittals
Dear Sir:
In a letter dated February 13, 1976, you summarized a meeting held January 29, 1976, between 3osten Edison Company personnel and members of your staff. You requested answers to ten questions on the Pilgrim Reload 2 Licensing submittal and seven:cen questions on the proposed Pilgrim single loop operation. The answers to these questions are contained in Attachments A and 3 to this letter.
Additional review of the 3oston Edison ECCS/GETA3 submittal dated July 9, 1975 and subsequent evaluation work performed by General Electric Company indicates that a cevision to the Technical Specification bases should be added to that submittal and, in addition, Page 6-1 of NED0-20855-01 should be revised. The bases change is indicated by the vertical line identified as " February, 1976" on the attached proposed revised Technical Specification Page 100.
This pro-posed change indicates that an injection of sufficitat boron to the reactor to give a concentratica of 700 ppa is necessary to bring the reactor from full power to a three percent ok suberitical condition. The actual shutdown margin obtained by achieving a boron concentration of 700 ppm in the reactor is 4.4 percent, considering the hot to cold reactivity difference, xenon poisoning, etc.
Similar Technical Specification bases revisions have been made to the licenses of other operating reactors.
Accordingly, our July 9, 1975 submittal is hereby revised to include a revision to the Technical Specification bases as indicated on the attached revised Page 100 and NEDO-20855-01 is revised as follows:
Page 6-1 Delete Section 6.3 and replace with "A boron concentration of 700 ppm in the moderator water will bring the reactor subcrit-ical by greater than 0.03 ak at 20 C, xenon free."
8411290356 840419 PDR FOIA BELL 84-105 PDR
e BOSTON EDISCN CCMPANY Director of Nuclear Reactor Regulation ATTN:
D. L. Ziemann, Chief March 19,1976 Page 2 We believe that this information and the information contained in Attachments A and 3 to this letter is sufficient to allow you to complete your review of the Pilgri Relcad 2 licensing submittal and to issue the propesed Technical Specifi-cation revisiens on ECCS/GETA3 and single loop operation, and uc request that you expedite their issuance to the extent possible.
Very truly yours,
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V G. Carl Andognini Manager Nuclesr Operations Attachments A Responses to NRC questions on Pilgrim Reload 2 licensing submittal.
B Responses to NRC questions on Single Loop Operation.
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