ML040780982
| ML040780982 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/22/2004 |
| From: | George Wunder NRC/NRR/DLPM/LPD1 |
| To: | Crane C Exelon Generation Co, Exelon Nuclear |
| Wunder G, NRR/DLPM, 415-1494 | |
| References | |
| TAC MC2018 | |
| Download: ML040780982 (6) | |
Text
March 22, 2004 Mr. Christopher M. Crane, President and Chief Nuclear Officer Exelon Nuclear Exelon Generation Company, LLC 200 Exelon Way, KSA 3-E Kennett Square, PA 19348
SUBJECT:
PEACH BOTTOM ATOMIC POWER STATION, UNIT 2 - REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING MAIN STEAM TUNNEL TEMPERATURE (TAC NO. MC2018)
Dear Mr. Crane:
By letter dated February 12, 2004, Exelon Generation Company, LLC, submitted a request for amendment that would increase the allowable high temperature in the main steam tunnel at Peach Bottom Atomic Power Station, Unit 2. In order to continue our review of your request, the Nuclear Regulatory Commission staff requires the additional information described in the enclosure. These questions were discussed in a telephone call with Mr. Doug Walker of your staff on March 15, 2004. In that call your staff agreed to a response date of March 29, 2004.
Sincerely,
/RA/
George F. Wunder, Project Manager, Section 2 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-277
Enclosure:
RAI cc w/encl: See next page
March 22, 2004 Mr. Christopher M. Crane, President and Chief Nuclear Officer Exelon Nuclear Exelon Generation Company, LLC 200 Exelon Way, KSA 3-E Kennett Square, PA 19348
SUBJECT:
PEACH BOTTOM ATOMIC POWER STATION, UNIT 2 - REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING MAIN STEAM TUNNEL TEMPERATURE (TAC NO. MC2018)
Dear Mr. Crane:
By letter dated February 12, 2004, Exelon Generation Company, LLC, submitted a request for amendment that would increase the allowable high temperature in the main steam tunnel at Peach Bottom Atomic Power Station, Unit 2. In order to continue our review of your request, the Nuclear Regulatory Commission staff requires the additional information described in the enclosure. These questions were discussed in a telephone call with Mr. Doug Walker of your staff on March 15, 2004. In that call your staff agreed to a response date of March 29, 2004.
Sincerely,
/RA/
George F. Wunder, Project Manager, Section 2 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-277
Enclosure:
RAI cc w/encl: See next page DISTRIBUTION:
PUBLIC PDI-2 R/F DRoberts GWunder SWall MOBrien ACRS CBixler, RI OGC EThrom RDennig BPham ADAMS Accession Number: ML040780982 OFFICE PDI-2/PM PDI-2/LA PDI-2/SC (A)
NAME GWunder MOBrien DRoberts DATE 03/22/04 03/22/04 03/22/04 OFFICIAL RECORD COPY
REQUEST FOR ADDITIONAL INFORMATION PEACH BOTTOM ATOMIC POWER STATION, UNIT 2 PROPOSED USE OF ALTERNATE SOURCE TERM (AST) METHODOLOGY 1.
Please provide a description of the GOTHIC nodal model (include the GOTHIC version number) used to model the buildings (volumes, flow paths, active heat removal systems and heat structures, and their initial conditions). Identify the model used for the break flow, the model(s) used for heat transfer to structures, and the model(s) used for flow between volumes.
2.
Please provide a discussion of the applicability of the GOTHIC subdivided volume model to the scenario being evaluated. Include references, based on the GOTHIC documentation, to recommended modeling approaches (for example, to connect flow paths between subdivided volume), parameters (for example, junction form loss coefficients and subdivided volume junction parameters such as the inertial length, hydraulic diameters and friction length between these volumes), and GOTHIC validation studies that relate to this scenario.
3.
Please provide the results of the benchmarks against the loss of ventilation events, and the results for the license amendment request (LAR) calculation(s).
4.
Identify the current licensing model (computer program or calculation). Provide a benchmark of the GOTHIC model to the current licensing model, using GOTHIC models which closely resemble the licensing model.
5.
Please provide electronic copy(ies) of the GOTHIC input deck(s) (*.GTH) for the model(s) used for the LAR and the benchmarks. The staff may perform independent, confirmatory analyses with the CONTAIN 2.0 code. In addition, the input deck provides the full description of the nodal models and the GOTHIC models used for the LAR.
Enclosure
Peach Bottom Atomic Power Station, Units 2 and 3 cc:
Vice President, General Counsel and Secretary Exelon Generation Company, LLC 300 Exelon Way Kennett Square, PA 19348 Site Vice President Peach Bottom Atomic Power Station Exelon Generation Company, LLC 1848 Lay Road Delta, PA 17314 Plant Manager Peach Bottom Atomic Power Station Exelon Generation Company, LLC 1848 Lay Road Delta, PA 17314 Regulatory Assurance Manager Peach Bottom Atomic Power Station Exelon Generation Company, LLC 1848 Lay Road Delta, PA 17314 Resident Inspector U.S. Nuclear Regulatory Commission Peach Bottom Atomic Power Station P.O. Box 399 Delta, PA 17314 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Mr. Roland Fletcher Department of Environment Radiological Health Program 2400 Broening Highway Baltimore, MD 21224 Correspondence Control Desk Exelon Generation Company, LLC 200 Exelon Way, KSA 1-N-1 Kennett Square, PA 19348 Rich Janati, Chief Division of Nuclear Safety Bureau of Radiation Protection Department of Environmental Protection Rachel Carson State Office Building P.O. Box 8469 Harrisburg, PA 17105-8469 Board of Supervisors Peach Bottom Township 545 Broad Street Ext.
Delta, PA 17314-9203 Mr. Richard McLean Power Plant and Environmental Review Division Department of Natural Resources B-3, Tawes State Office Building Annapolis, MD 21401 Dr. Judith Johnsrud National Energy Committee Sierra Club 433 Orlando Avenue State College, PA 16803 Manager-Financial Control & Co-Owner Affairs Public Service Electric and Gas Company P.O. Box 236 Hancocks Bridge, NJ 08038-0236 Manager Licensing-Limerick and Peach Bottom Exelon Generation Company, LLC Nuclear Group Headquarters Correspondence Control P.O. Box 160 Kennett Square, PA 19348
Peach Bottom Atomic Power Station, Units 2 and 3 cc:
Director - Licensing Mid-Atlantic Regional Operating Group Exelon Generation Company, LLC Nuclear Group Headquarters Correspondence Control P.O. Box 160 Kennett Square, PA 19348 Vice President-Licensing and Regulatory Affairs Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Senior Vice President Mid-Atlantic Regional Operating Group Exelon Generation Company, LLC 200 Exelon Way, KSA 3-N Kennett Square, PA 19348 Senior Vice President, Nuclear Services Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Vice President, Mid-Atlantic Operations Support Exelon Generation Company, LLC 200 Exelon Way, KSA 3-N Kennett Square, PA 19348 Manager License Renewal Exelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348