ML20046B150
| ML20046B150 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 07/26/1993 |
| From: | Dentor R BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20046B151 | List: |
| References | |
| TAC-M68525, TAC-M68526, NUDOCS 9308030179 | |
| Download: ML20046B150 (2) | |
Text
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BALTIMORE I
GAS AND N/{
. ELECTRIC 1650 CALVERT CUFFS PARKWAY. LUSBY, MARYLAND 20657-4702 ROBERT E. DENTON VicE PRESIDENT NUCLEAR ENERGY (410) 260-4455 July 26,1993 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
Document Control Desk
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2: Docket Nos. 50-317 & 50-318 Emercency Diesel Generator Project - Electrical Engineerine Desien Report
REFERENCES:
(a)
Letter from Mr. D. G. Mcdonald, Jr. (NRC) to Mr. G. C. Creel (BG&E), dated October 10,1990, Response to Station Blackout Rule (TAC Nos. M68525 and M68526)
(b)
Letter from Mr. D. G. Mcdonald, Jr. (NRC) to Mr. G. C. Creel (BG&E), dated February 12,1991, Response to Station Blackout Rule (TAC Nos. M68525 and M68526)
(c)
Letter from Mr. R. E. Denton (BG&E) to NRC Document Control Desk, dated July 7,1993, Modification to Our Station Blackout Rule
Response
(d)
Letter from Mr. R. E. Denton (BG&E) to NRC Document Control Desk, dated July 20, 1993, Emergency Diesel Generator Project -
SACM Diesel Generator and Mechanical Systems Design Report In response to the requirements of 10 CFR 50.63, Baltimore Gas and Electric Company is adding one safety-related diesel generator and one non-safety-related diesel generator at our two-Unit Calvert Cliffs Nuclear Power Plant. 'Ihese diesel generators enhance our ability to meet station blackout requirements. After the installation of the new diesel generators is complete, we will have one diesel generator dedicated to each of the four engineered safety features busses, with the non-safety-related diesel generator used to mitigate station blackout conditions and as a standby for any of the four dedicated diesel generators. The NRC has reviewed and approved the basic concept of our station blackout response capability as both an alternate AC and AC independent site (References a and b). We have modified our station blackout response (Reference c) and are awaiting NRC approval of the change. The initial approval was contingent upon our submittal to the NRC of design information concerning: the new diesel generator installation, the change in our onsite emergency electrical system, and the alternate AC power source. The attachment to this letter is one of the submittals requested.
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Document Control Desk July 26,1993 Page 2 In order to gain NRC approval of the modifications to our on-site emergency electrical system, we are preparing a series of design reports for NRC review. These design reports will cover appropriate 3
aspects of the diesel generator design and qualification, and changes to our electrical system. The design reports have been broken down into several groups to aid in their review by the NRC. These groups are: Civil Engineering, SACM Diesel Generator and Mechanical Systems, Electrical 1
Engineering, and Instrumentation and Controls. In addition to these design reports, other correspondence will be provided to describe the alternate AC power source. Requests to change the Technical Specifications will be supplied in separate submittals.
The Electrical Engineering Design Report is attached. This report describes the existing electrical
. distribution system and the modified distribution system (after the addition of one safety-related diesel generator). In addition, it discusses the electrical support systems for the diesel generator and for the Diesel Generator Building. The report discusses the design b_ases and gives a system description for the various electrical support systems. An important function of this report is to detail our commitment to various codes, standards and Regulatory Guides. Our commitments and exceptions to the various codes and standards are explicitly described in the various sections of the report. Note, however, that these commitments are for design, procurement, fabrication and construction only; operational and surveillance commitments will be made through the License
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Amendment Request.
This is Revision 0 of the subject report. While a majority ofinformation concerning the electrical systems is contained in this report, some information is contained in other reports. The function and some of the controls of the diesel generator are discussed in the SACM Diesel Generator and Mechanical Systems Design Report (Reference d). Instrumentation and-controls for the diesel generator will be described in the Instrumentation and Controls Report. Responses to questions or concerns arising from the NRC review will be included in future report revisions.
We request that this report be reviewed and approved by February 1,1994. This date will support installation of the majority of the electrical equipment Should you have any questions regarding this matter, we will be pleased to discuss them with you.
Very trulyyours, l [
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RED / PSF / psf / dim
Attachment:
As Stated cc:
D. A.Brune, Esquire i
J. E. Silberg, Esquire R. A. Capra, NRC D. G. Mcdonald, Jr., NRC T. T. Martin, NRC P. R. Wilson, NRC R. L McLean, DNR 3
J. H. Walter, PSC i