ML20057C380
| ML20057C380 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 09/22/1993 |
| From: | Mcdonald D Office of Nuclear Reactor Regulation |
| To: | Denton R BALTIMORE GAS & ELECTRIC CO. |
| Shared Package | |
| ML20057C381 | List: |
| References | |
| TAC-M86999, TAC-M87000, NUDOCS 9309280291 | |
| Download: ML20057C380 (3) | |
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UNITED STATES
[ [i,4 *.~ j NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D.C. 20556-0001 September 22, 1993 Docket Nos. 50-317 and 50-318 Mr. Robert E. Denton Vice President - Nuclear Energy Baltimore Gas & Electric Compan.<
Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657-4702
Dear Mr. Denton:
SUBJECT:
SUPPLEMENTAL SAFETY EVALUATION OF RESPONSE TO THE STATION BLACK 0UT RULE, 10 CFR 50.63 - CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NO. 1 (TAC NO. M86999) AND UNIT N0. 2 (TAC NO. M87000)
The NRC staff's safety evaluation (SE) and supplemental safety evaluation (SSE) pertaining to the Baltimore Gas and Electric Company's (BG&E) responses to the Station Blackout (S30) Rule, 10 CFR 50.63, were transmitted to BG&E by letters dated October 10, 1990, and February 12, 1991, respectively. The staff's SSE found the BG&E's proposed method of coping with an SB0 to be acceptable (alternating current (ac)-independent and I hour alternate ac power source based on the commitment to install two safety-related emergency diesel generators).
By letter dated July 7, 1993, BG&E submitted a revised response to the SB0 Rule. One of the initial commitments approved by the NRC staff in its SE and SSE was to install two safety-related emergency diesel generators, as noted above, which would have resulted in a total of five safety-related diesel generators at the site. The revised response is to add one safety-related and one nonsafety-related emergency diesel generators. The nonsafety-related emergency diesel generator will be utilized as an alternate ac power source during SB0 conditions.
The NRC staff has completed its review of the July 7, 1993, revised SB0 submittal and has determined that it provides an acceptable means for coping with an SB0 event and is, therefore, acceptable. The details supporting this conclusion are provided in the enclosed SSE evaluation.
It should be noted that the previous findings detailed in the initial SE and SSE, which are not c, hanged by this SSE, are still valid and in effect.
The NRC staff has accepted the Unit I refueling outage currently scheduled for June of 1996 as the final completion date for implementing all the h,$ bE bhbb i
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Mr. Robert E. Denton September 22, 1993 modifications and changes necessary to be in compliance with the SB0 Rule.
All of the supporting documentation whir,h provides the basis for compliance with the SB0 Rule shall be maintained in an auditable form.
This completes our actions related to the above referenced TACs.
Sincerely, w.
Daniel G. Mcdonald, Senior Project Manager Project Directorate I-I Division of Reactor Projects - 1/II Office of Nuclear Reactor Regulation
Enclosure:
Supplemental Safety Evaluation cc w/ enclosure:
See next page 1
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Mr. Robert E. Denton Calvert Cliffs Nuclear Power Plant Baltimore Gas & Electric Company Unit Nos. I and 2 cc:
Mr. Michael Moore, President Mr. Joseph H. Walter Calvert County Board of Engineering Division Comissioners Public Service Commission of 175 Main Street Maryland Prince Frederick, Mar.r.and 20678 American Building 231 E. Baltimore Street D. A. Brune, Esquire Baltimore, Maryland 21202-3486 General Counsel i
Baltimore Gas and Electric Company Kristen A. Burger, Esquire i
P. O. Box 1475 Maryland People's Counsel i
Baltimore, Maryland 21203 American Building, 9th Floor 231 E. Baltimore Street Jay E. Silberg, Esquire Baltimore, Maryland 21202 Shaw, Pittman, Potts and Trowbridge 2300 N Street, NW Patricia T. Birnie, Esquire Washington, DC 20037 Co-Director Maryland Safe Energy Coalition Mr. G. L. Detter, Director, NRM P. O. Box 33111 Calvert Cliffs Nuclear Power Plant Baltimore, Maryland 21218 1650 Calvert Cliffs Parkway Lusby, Maryland 20657-47027 Resident Inspector c/o U.S. Nuclear Regulatory Commission P. O. Box 287 St. Leonard, Maryland 20685 Mr. Richard I. McLean Administrator - Radioecology Department of Natural Resources 580 Taylor Avenue Tawes State Office Building B3 Annapolis, Maryland 21401 Regional Administrator, Region I U.S. Nuclear Regulatory Comission 475 Allendale Road King of Prussia, Pennsylvania 19406