ML20248C743
| ML20248C743 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 05/26/1998 |
| From: | Dromerick A NRC (Affiliation Not Assigned) |
| To: | Cruse C BALTIMORE GAS & ELECTRIC CO. |
| References | |
| GL-96-06, GL-96-6, TAC-M96792, TAC-M96793, NUDOCS 9806020242 | |
| Download: ML20248C743 (5) | |
Text
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Mr. Ch:rt:s H. Cruse May 26, 1998 Vice Pr sid:nt-Nuclear Energy B:!timore Grs cnd Electric Comp:ny Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING RESPONSE TO GUIDANCE LETTER (GL) 96-06 FOR THE CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS.1 AND 2 (TAC NOS. M96792 AND M96793)
Dear Mr. Cruse:
By letters dated January 28,1997, and May 2,1997, Baltimore Gas and Electric Company (BGE) responded to GL 96-06, " Assurance of Equipment Operability and Containment Integrity During Design Basis Accident Conditions" regarding Calvert Cliffs Nuclear Power Plant, Unit Nos.1 and
- 2. The NRC staff has determined that it requires additionalinformation regarding matters related to the thermally-induced pressurization of piping runs penetrating the containment. The additional information required is addressed in the enclosure.
We request that you provide the requested information within 45 days of receipt of this letter. If you have any questions, please contact me at (301) 415-3473.
Sincerely, Original Signed by:
Alexander W. Dromerick, Senior Project Manager Project Directorate I-1 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation Docket Nos. 50-317 and 50-318
Enclosure:
Request for Additional Information cc w/ encl: See next page DISTRIBUTION:
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Mr. Chariss H. Crus 3 May 26, 1998 Vico Prasidant - Nuclacr Enrrgy Baltimora Grs cnd Electric Company i
Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING RESPONSE TO GUIDANCE LETTER (GL) 96-06 FOR THE CALVERT Cl.lFFS NUCLEAR POWER PLANT, UNIT NOS.1 AND 2 (TAC NOS. M96792 AND M96793)
Dear Mr. Cruse:
By letters dated January 28,1997, and May 2,1997, Baltimore Gas and Electric Company (BGE) responded to GL 96-06, " Assurance of Equipment Operability and Containment Integrity During Design Basis Accident Conditions" regarding Calvert Cliffs Nuclear Power Plant, Unit Nos.1 and
- 2. The NRC staff has determined that it requires additionalinformation regarding matters related to the thermally-induced pressurization of piping runs penetrating the containment. The additional information required is addressed in the enclosure.
We request that you provide the requested information within 45 days of receipt of this letter. If you have any questions, please contact me at (301) 415-3473.
Sincerely, Original Signed by:
Alexander W. Dromerick, Senior Project Manager Project Directorate 1-1 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation Docket Nos. 50-317 and 50-318
Enclosure:
Request for Additional Information cc w/ encl: See next page DISTRIBUTION:
Docket File S. Little PUBLIC A. Dromerick PDI-1 R/F OGC J. Zwolinski (A)
ACRS S. Bajwa C. Hehl, Region i DOCUMENT NAME:G:\\CC1-2\\CCM96762.RAI To rocsive a copy of this document, indicate in the box: "C" = Copy without attachment / enclosure *E"
= Copy with attachment / enclosure "N" = No copy joFFICE PM:PDf-bgO lE 'LA:PDI-( k l
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May 26, 1998 Mr. Charles H. Cruse Vice President - Nuclear Energy Baltimore Gas and Electric Company Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING RESPONSE TO GUIDANCE LETTER (GL) 96-06 FOR THE CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS.1 AND 2 (TAC NOS. M96792 AND M96793)
Dear Mr. Cruse:
By letters dated January 28,1997, and May 2,1997, Baltimore Gas and Electric Company (BGE) responded to GL 96-06, " Assurance of Equipment Operability and Containment integrity During Design Basis Accident Conditions" regarding Calvert Cliffs Nuclear Power Plant, Unit Nos.1 and
- 2. The NRC staff has determined that it requires additionalinformation regarding matters related to the thermally-induced pressurization of piping runs penetrating the containment. The additional information r3 quired is addressed in the enclosure.
We request that you provide the requested information within 45 days of receipt of this letter. If you have any questions, please contact me at (301) 415-3473.
Sincerely, Alexander W. Dromerick, Senior Project. Manager Project Directorate 1-1 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation Docket Nos. 50-317 and 50-318
Enclosure:
Request for Additional Information cc w/ encl: See next page
e 3
Mr. Charles H. Cruse Baltimore Gas & Electric Company Calvert Cliffs Nuclear Power Plant cc:
President Mr. Joseph H. Walter, Chief Engineer Calvert County Board of Public Service Commission of Commissioners Maryland 175 Main Street Engineering Division Prince Frederick, MD 20678 6 St. Paul Centre Baltimore, MD 21202-6806 James P. Bennett, Esquire Counsel Kristen A. Burger, Esquire Baltimore Gas and Electric Company Maryland People's Counsel P.O. Box 1475 6 St. Paul Centre Baltimore, MD 21203 Suite 2102 Baltimore, MD 21202-1631 Jay E. Silberg, Esquire Shaw, Pittman, Potts, and Trowbridge Patricia T. Bimie, Esquire 2300 N Street, NW Co-Director Washington, DC 20037 Maryland Safe Energy Coalition P.O. Box 33111 Mr. Thomas N. Pritchett, Director Baltimore, MD 21218 NRM Calvert Cliffe 'Nelear Power Plant
. Mr. Loren F. Donatell 1650 Calveu unifs Parkway NRC Technical Training Center Lusby, MD 20657-4702 5700 Brainerd Road Chattanooga, TN 37411-4017 Resident inspector U.S. Nuclear Regulatory Commission P.O. Box 287 St. Leonard, MD 20685 Mr. Richard I. McLean, Manager Nuclear Programs Power Plant Research Program Maryland Dept. of Natural Resources Tawes State Office Building, B3 Annapolis, MD 21401 Regional Administrator, Region i U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406
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REQUEST FOR ADDITIONAL INFORMATION CALVERT CLIFFS NUCLEAR POWER PLANT. UNIT NOS.1 ANQ1
- 1. In its submittals Baltimore Gas and Electric Company (BGE) indicated that a total of six pipe segments in each unit were susceptible to theimally-induced pressurization. The licensee indicated that operating instructions would be changed to include draining of three of the pipe segments prior to plant operations.
For two of the pipe segments, BGE also indicated that no overpressurization would occur due to existing installed insulation. The NRC staff requests that BGE provide the following information.
a) Provide the applice.ble design criteria for the piping and the valves. Include the required load combinations, b) Provide a drawing of the piping run between the isolation values. Include the lengths and thicknesses of the insulation.
c) Provide the maximum - calculated temperature and pressure for the pipe run. Describe in detail, the method to calculate these pressure and temperature values. This should include a discussion of the heat transfer model used in the analyses and the basis for the heat transfer coefficients used in the analyses.
- 2. BGE also indicated for one segment, either a relief device would be installed or insulation I
would be added to the piping section exposed to loss-of coolant accident temperature.
Please clarify the specific method chosen to prevent overpressurization. If BGE is adding i
insulation, please provide the same information as for the two piping segments discussed in request 1.
I 1
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Enclosure I