ML20210B293
| ML20210B293 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 02/03/1987 |
| From: | Elkins D BALTIMORE GAS & ELECTRIC CO. |
| To: | Mcneil S Office of Nuclear Reactor Regulation |
| References | |
| FCM-87-022, FCM-87-22, NUDOCS 8702090122 | |
| Download: ML20210B293 (2) | |
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BALTIMORE GAS AND ELECTRIC CHARLES CENTER. P.O. BOX 1475 BALTIMORE, MARYLAND 21203 NUCLEAR ENGINEERING SERVICES DEPARTMENT CALVERT CUFFS NUCLEAR POWER PLANT LUS8Y, MARYLANO 20657 February 3,1987 FCM 87-022 Mr. S. A. McNeil Office of Nuclear Reactor Regulation Nuclear Regulatory Commission Washington, D.C. 20555
SUBJECT:
Pending Moderator Temperature Coefficient (MTC) Technical Specification Change
REFERENCE:
(a) Letter, 3.A. Tiernan (BG&E) to A.C. Thadani (NRC), " Unit Nos.1 & 2; Docket Nos. 50-317 & 50-318 Request for Amendment", July 31,1986 (b) Letter, C.H. Poindexter (BG&E) to E.3. Butcher, Jr. (NRC), Docket No. 50-318, " Request for Amendment to Operating License DPR-69, Seventh Cycle License Application", August 30,1985 Reference (a) requests a change to the positive MTC limit to facilitate implementation of the 24-month fuel cycle program. Although we hope to resolve the questions which remain unresolved between the NRC and BG&E concerning the request, the Feed Line Break analysis presented in that submittal has been redone with a more limiting MTC input, in an effort to uncomplicate the upcoming Unit 2 Cycle 8 Reload License submittal. In fact, there is now no connection between the Reference (a) submittal and Unit 2 Cycle 8 safety analyses.
The Feed Line Break event was reanalyzed with a more limiting postive MTC limit that ramps down from +.7% delta Rho / F at 70% power to +.3% delta Rho / F at 100%. This MTC limit results in a peak reactor coolant system (RCS) pressure of less than the 110%
RCS design pressure.
The upcoming Unit 2 Cycle 8 license submittal will reference only briefly the Feedline Break Analysis results as they were bounded by the reload analysis reference cycle results. The reference cycle for the upcoming Cycle 8 is Unit 2 Cycle 7 (Reference (b)).
D. S. Elkins Senior Engineer Fuel Cycle Management DSE/Imt ll 080 I 8702090122 870203 a
PDR ADOCK 05000318 gQ p
Fc=bru::ry 3,1987 FCM 87-022 i
Page 2 cc: M. E. Bowman L. E. Saiyards W. C. Holston W. P. McCaughey
- 3. E. Baum (C-E) 3AM/ File: Licensing