ML20045B287

Requests That Util Provide Written Comments on Preliminary Evaluation of Encl Ler.Statements to Be Addressed in Response Listed.W/O Encl

ML20045B287
Person / Time
Site:	Calvert Cliffs
Issue date:	06/11/1993
From:	Mcdonald D Office of Nuclear Reactor Regulation
To:	Denton R BALTIMORE GAS & ELECTRIC CO.
References
NUDOCS 9306170142
Download: ML20045B287 (4)

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June 11, 1993 J

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Docket No. 50-317 Mr. Robert E. Denton Vice President - Nuclear Energy Baltimore Gas & Electric Company Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657-4702

SUBJECT:

PRELIMINARY EVALUATION OF CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT 1, LICENSEE EVENT REPORT 317/92-08, " GROUND FAULT IN ISOLATED PHASE BUS DUCT SYSTEM," INPUT TO ACCIDENT SEQUENCE PRECURSOR REPORT FOR 1992 The NRC Office for Analysis and Evaluation of Operational Data (AE0D) has drafted the 1992 Accident Sequence Precursor (ASP) report, " Precursors to Potential Severe Core Damage Accidents:

1992, A Status Report,"

NUREG/CR-4674, Vol. 17 & 18. The subject Licensee Event Report (LER) for Calvert Cliffs, Unit 1, is one of the 1992 precursor events which is included in the AEOD draft ASP report.

The NRC staff requests that Baltimore Gas & Electric Company (BG&E) provide written comments on the Preliminary evaluation of the subject LER, which is enclosed.

BGLE should address the following in its response:

1) comments on the ASP analysis characterization of the possible Unit I response as the result of the event, 2) whether the analysis reasonably represents the plant safety equipment configurations and capabilities which existed at the time of the event, and 3) comments on the analyst's assumptions regarding equipment recovery probabilities.

We request that the comments be provided by June 25, 1993, to allow review and revision, as appropriate, of the draft 1992 ASP report.

The final report is scheduled to be issued in September of this year.

We appreciate your assistance in this effort.

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l Mr. Robert E. Denton June 11, 1993

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i This request is covered by Office of Management and Budget Clearance Number 3150-0011, which expires June 30, 1994.

The estimated average number of burden hours is 80 person ~ hours per owner response, including the time required to assess the new recommendations, search data sources, gather and analyze the data, and prepare the required letters. Comments on the accuracy of this estimate and suggestions to reduce the burden may be directed to the Desk Officer, Office nf Information and Regulatory Affairs (3150-0011),

NE0B-3019, Office of Management and Budget, Washington, DC 20503, and to the U.S. Nuclear Regulatory Commission, Information and Records Management Branch (MNBB 7714), Division of Information Support Services, Office of Information L

and Resources Management, Washington, DC 20555.

Sincerely, f

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Daniel G. Mcdonald, Senior Project Manger Project Directorate 1-1 Division of Reactor Projects - 1/II Office of Nuclear Reactor Regulation

Enclosure:

Preliminary ASP Analysis cc w/ enclosure:

See next page a

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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 i

Commissioners Public Service Commission of 175 Main Street Maryland Prince Frederick, Maryland 20678 American Building i

231 E. Baltimore Street D. A. Brune, Esquire Baltimore, Maryland 21202-3486 i

General Counsel Baltimore Gas and Electric Company Kristen A. Burger, Esquire P. O. Box 1475 Maryland People's Counsel 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 i

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 Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 f

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Mr. Robert E. Denton June 11, 1993 t

This request is covered by Office of Management and Budget Clearance Number 3150-0011, which expires June 30, 1994. The estimated average number of burden hours is 80 person hours per owner response, including the time required to assess the new recommendations, search data sources, gather and analyze the data, and prepare the required letters.

Comments on the accuracy of this estimate and suggestions to reduce the burden may be directed to the i

Desk Officer, Office of Information and Regulatory Affairs (3150-0011),

NE0B-3019, Office of Management and Budget, Washington, DC 20503, and to the U.S. Nuclear Regulatory Commission, Information and Records Management Branch (MNBB 7714), Division of Information Support Services, Office of Information and Resources Management, Washington, DC 20555.

Sincerely, l

Original Signed By:

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Daniel G. Mcdonald, Senior Project Manger i

Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation j

Enclosure:

i Preliminary ASP Analysis l

l cc w/ enclosure.

See next page DISTRIBUTION:

Docket File NRC & Local PDRs PDI-l Reading SVarga JCalvo RACapra CVogan DMcDonald OGC ACRS (10)

CCowgill, RGN-1 Plant File OFFICE PDI-1:LA PDI-1:PM:3(AI)) PDI-1:D NAME CVogan

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