ML20150C368
| ML20150C368 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 03/11/1988 |
| From: | Mcneil S Office of Nuclear Reactor Regulation |
| To: | Tierman J BALTIMORE GAS & ELECTRIC CO. |
| References | |
| TAC-67143, NUDOCS 8803180195 | |
| Download: ML20150C368 (3) | |
Text
Magch 11, 1988
.9 t
Docket No. 50-317 DISTRUBTION DoiEeETITip SMcNeil NRC PDR" ' ~
LTripp Local PDR LKopp Mr. J. A. Tiernan PDI-1 Rdg.
0GC-WF Vice President-Nuclear Energy SVarga EJordan Baltimore Gas and Electric Company BRoger JPartlow P.O. Box 1475 CVogan ACRS(10)
Baltimore, Maryland 21203
Dear Mr. Tiernan:
SUBJECT:
PE0 VEST FOR ADDITIONAL INFORMATION - UMIT 1 CYCLE 10 RELOAD (TAC 67143)
Your letter dated February 12, 1988 requested amendment to Operating License No. DPR-69 for Calvert Cliffs Unit I to operate for a tenth cycle.
The NRC staff has performed an initial review of your supporting safety analysis infomation and has determined that additional information is required to complete the review. The request for additional information is enclosed.
As you are intending to complete this refueling outage with heat up to mode 4 on May 17, 1988, time is very short for completing our review.
In order to expedite the completion of this review, please provide the infomation as requested within 20 days of this letter's issuance date.
This request for information affects fewer than 10 respondents; therefore, OMB clearance is not required under Public Law 95-511.
L Sincerely, Scott Alexander McNeil, Project Manager Project Directorate I-1 Division of Reactor Projects. I/II
Enclosure:
As stated cc: See next page PDI-1 PDI-1 PDI-1 CVogan N SMcNei : dig RCapra i
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Mr. J. A. Tiernan Baltimore Gas & Electric Company Calvert Cliffs Nuclear Power Plant cc:
Mr. John M. Gott, President Regional Administrator, Region I Calvert County Board of U.S. Nuclear Regulatory Commission Commissioners 475 Allendale Road Prince Frederick, Maryland 20768 King of Prussia, Pennsylvania 19406 D. A. Brune, Esq.
General Counsel Baltimore Gas and Electric Company P. O. Box 1475 Baltimore, Maryland 21203 Jay E. Silberg, Esq.
Shaw, Pittman, Potts and Trowbridge 1800 M Street, NW Washingtnn, DC 20036 Mr. M. E. Bowman, General Supervisor Technical Services Engineering Calvert Cliffs Nuclear Power Plant MD Rts 2 A 4, P. O. Box 1535 Lusby, Maryland 20657-0073 Resident Inspector c/o U.S. Nuclear Regulatory Commission P. O. Box 437 Lusby, Maryland 20657-0073 Bechtel Power Corporation ATTN: Mr. D. E. Stewart Calvert Cliffs Project Engineer 15740 Shady Grove Road i
Gaithersburg, Maryland 20760 Combustion Engineering, Inc.
ATTN: Mr. W. R. Horlacher, III Project Manager P. O. Box 500 1000 Prospect Hilt Road i Windsor, Connecticut 06095-0500 Department of Natural Resources Energy Administration, Power Plant Siting Program ATTN: Mr. T. Magette Tawes State Office Building Annapolis, Maryland 21204 l
REQUEST FOR ADDITIONAL INFORMATION BALTIM0RE GAS AND ELECTRIC COMPANY CALVERT CLIFFS UNIT 1 CYCLE 10 RELOAD 1.
Your staff stated on March 10, 1988 that they intend to withdraw the changes proposed to make the requiremen?s of Technical Specification (TS) 3/4.1.1, "Boration Control, Shutdown M< gin - Tavg 5 > 200 F," inapplicable to critical operating modes (Modes 1 and 2 when Keff > 1.0). Therefore, please provide the appropriate data on CEA worths to verify that the shutdown margin requirements at E0C, hot zero power can be achieved.
2.
Table 9-1 of your February 12, 1988 submittal states that your proposed change to Limiting Condition For Operation 3.1.1.4, "Moderator Temperature Coefficient," (MTC) is identical to the change proposed in your letter of February 6,1987 (Unit 2 Cycle 8 Reload request) as was approved in our Safety Evaluation dated May 4, 1987.
In this Safety Evaluation, the acceptability of this MTC change was contingent upon your commitment to a negative MTC at hot full power, equilit'rium xenon conditions.
This commitment was made in lieu of your submission of an evaluation of the impact of increasingly positive MTCs on the safety margin provided for ATWS.
Please commit to a negative MTC at hot full power, equilibrium xenon conditions or provide your analysis of the impact of this MTC change upon the ATWS safety margin.
3.
The maximum pin burnup for some C-E fuel may reach 54,100 MWD /T during cycle 10 which is higher than the 52,000 MWD /T value accepted by the staff for high burnup C-E fuel.
Therefore, please confirm that the maximum pressure within these pins will remain below the nominal system pressure of 2250 psia.
4.
Since the C-E fuel DNBR calculations are based on the CE-1 correlation, whereas the ANF fuel DNBR calculations are based on the XNB correlation, how is the extended SCU methodology affected by the mixed C-E/ANF core?
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