ML20031A104
| ML20031A104 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 09/02/1981 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| Shared Package | |
| ML20031A105 | List: |
| References | |
| NUDOCS 8109180587 | |
| Download: ML20031A104 (2) | |
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Dear tir. Lundvall:
We have completed our review of the Combustion Engineering (CE) Topical ReportCEN-121(G)-P,"MethodsofAnalyzingSequentialControlElement Assembly Group Withdrawal Event for Analog Protected Systems", dated Hovember 1979. OurevaluationofCEN-121(B)-Pisenclosed.-
Based on our review of CEN-121(B)-P, we conclude that the subject report is an acceptable reference for the method of analyzing a Control Element Assembly Group Withdrawal (CEAll) event for Calvert Cliffs Units 1 and 2.
We concur that the results presented support reclassification of the CEAW event from the category requiring the Thermal Margin / Low Pressure (TM/LP) and Axial Shape Index (ASI) trips to the category where sufficient initial thermal margin is built into the Limiting Conditioil for Operation (LC0's) to ensure that Departure from Nucleate Boiling (DNB) and Linear !! cat Rete 1 (LilR) Specified Acceptable Fuel Design Limits (SAFDL's) are not exceeded when only the High Power (HP) or Very High Power (VHP) trips are credited f
as possible trips to mitigate the event. This reclassification infers that the CEAW event is no longer the limiting event for the calculation of the pressure bias factor used in establishing the TM/LP setsoints although this bias term for the Til/LP trip is still required'and determined for other transients as described in CENPD-199-P.
Sincerely, Original signed by Robert A. Clark Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing
Enclosure:
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Baltimore Gas and Electric Company cc:
James A. Biddison, Jr.
Ms. Mary Harrison, Presiden't General Counsel Calvert County Board of County Commissioners Baltimore Gas and Electric Company Prince Frederick, MD 20768 P. O. Box 1475 Baltimore, MD 21203 U. S. Environmental Protection Agency Region III Office George F. Trowbridge, Esquire Attn:
EIS Coordinator Shaw, Pittman, Potts and Trowbridge Curtis Building (Sixth Floor) 1800 M Street, N. W.
Sixth and Walnut Streets Washington, D. C.
20036 Philadelphia, PA 19106 Mr. R. C. L. Olson, Principal Engineer Mr. Ralph E. Architzel Nuclear Licensing Analysis Unit Resident Reactor Inspector Baltimore Gas and Electric Company NRC Inspection and Enforcement Room 922 - G&E Building P. O. Bos 437 P.,0. Box 1475 Lusby, MD 20657 Baltimore, MD 21203 Mr. Charles B. Brinkman Mr. Leon B. Russell Manager - Washington Nuclear Operations Plant Superintendent Combustion Engineering, Inc.
Calvert Cliffs Nuclear Power Plant 4853 Cordell Avenue, Suite A-1 Maryland Routes 2 & 4 Bethesda, MD 20014 Lusby., MD 20657 14r. J. A. Tieman, Manager Bechtel Power Corporation Nuclear Power Department Atta:
Mr. J. C. Judd Calvert Cliffs Nuclear Power Plant Chief Nuclear Engineer Maryland Routes 2 & 4 15740 Shady Grove Road Lusby, MD 20657 -
Gaithersburg, MD 20,760 Mr. W. J. Lippold, Supervisor Combustion Engineering, Inc.
Nuclear Fuel Management Attn:
Mr. P. W. Kruse, Manager Baltimore Gas and Electric Company Engineering Services Calvert Cliffs Nuclear Power Plant P. O. Box 500 P. O. Box 1475 Windsor, CT 06095 Baltimore, Maryland 21203 Public Doc" ment Room Mr. R. E. Denton, General Supervisor Calvert County Library Trair.ing & Technical Services Prince Frederick, MD 20678 Calvert Cliffs Nuclear Power Plant Maryland Routes 2 & 4 Director, Department of State Planning Lusby, MD 20657 301 West Preston Street Baltimore, MD 21201 Mr. R. M. Douglass, Manager Quality Assurance Department Administrator, Power Plant Siting Program Fort Smallwood Road Complex Energy and Coastal Zone Administration P. O. Box 1475 Department of Natural Rescurces Baltimore, MD 21203 Tawes State Office Building Annapolis, MD 21204 Mr. T. L. Syndor, General Supervisor Operations Quality Assurance Calvert Cliffs Nuclear Power Plant Maryland Routes 2 & 4 Lusby, MD 20657
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