ML042100423

RAI, Regarding Peach Bottom Atomic Power Station Request for Activation of Oscillation Power Range Monitior

ML042100423
Person / Time
Site:	Peach Bottom
Issue date:	08/13/2004
From:	George Wunder NRC/NRR/DLPM/LPD1
To:	Crane C Exelon Generation Co, Exelon Nuclear
Wunder G, NRR/DLPM, 415-1494
References
TAC MC2219, TAC MC2220
Download: ML042100423 (5)

Text

August 13, 2004 Mr. Christopher M. Crane President and Chief Nuclear Officer Exelon Nulcear Exelon Generation Company, LLC 200 Exelon Way, KSA 3-E Kennett Square, PA 19348

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3, REQUEST FOR ACTIVATION OF OSCILLATION POWER RANGE MONITOR (TAC NOS. MC2219 AND MC2220)

Dear Mr. Crane:

By letter dated February 27, 2004, you requested amendments to the Technical Specifications for the Peach Bottom Atomic Power Station, Units 2 and 3. The proposed amendments would support the activation of the oscillation power range monitor. In order to complete our review of your amendment request we will need answers to the questions in the enclosed Request for Additional Information (RAI). I forwarded an electronic copy of these questions to Mr. Glenn Stewart of your staff and the questions were discussed with your staff in a telephone call on August 4, 2004. As a result of this call, the term period based algorithm allowable value and confirmation counts in Question 2. was replaced with the term period based algorithm setpoint and confirmation counts. I understand that you plan to respond to this RAI by September 14, 2004.

Sincerely,

/RA/

George F. Wunder, Project Manager, Section 2 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-277 and 50-278

Enclosure:

RAI cc w/encl: See next page

ML042100423 OFFICE PM/PD1-2 LA/PD1-2 SC/PD1-2 NAME GWunder MOBrien JClifford DATE 8/11/04 8/12/04 8/12/04 REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION EXELON GENERATION COMPANY, LLC PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 DOCKET NOS. 50-277/278 The Nuclear Regulatory Commission staff has reviewed the February 27, 2004, amendment request and has identified the following questions to be addressed by the licensee in order to complete our evaluation.

1. Please provide the detailed procedures to verify the accuracy of trip setpoints for the new oscillation power range monitor (OPRM) instrumentation based on available data of the system calibration tests during normal operation as well as the shutdown and subsequent start-up from refueling outage.

2. Please provide a detailed description of the methodology for calculation of the plant-specific Delta CPR/Initial CPR Vs. Oscillation Magnitude (DIVOM) correlation and the OPRM setpoints for Technical Specification (TS) 3.3.1.1. Also, provide a detailed description of the procedure to generate the OPRM period based algorithm setpoint and confirmation counts for future cycles. Please identify any plant-specific differences from the generic values specified in NEDO-32465-A such as period based detection algorithm (PBDA) period confirmation setpoints in Table 3-1, PBDA trip setpoints in Table 3-2, and generic DIVOM curve slope. Provide specific values for OPRM scram setpoints and the DIVOM correlation for the next cycle.

3. Please provide a detailed description of the alternate method to detect and suppress thermal hydraulic instability oscillation stated in TS 3.3.1.1, Action I.1, including its functional relationship with Required Action I.1 stated in TS 3.3.1.1 for OPRM. Also, Provide the rationale to delete Figure 3.4.1-1 from the TSs and identify any role of Figure 3.4.1-1 in the reactor operating manual.

4. Please provide an example of the new core operating limit report format for the next cycle as shown in Table 3.3.1.1-1, Function 2.f, and justify allowable value is NA as stated in footnote d to the table.

Enclosure

Peach Bottom Atomic Power Station, Unit Nos. 2 and 3 cc:

Site Vice President Rich Janati, Chief Peach Bottom Atomic Power Station Division of Nuclear Safety Exelon Generation Company, LLC Bureau of Radiation Protection 1848 Lay Road Department of Environmental Protection Delta, PA 17314 Rachel Carson State Office Building P.O. Box 8469 Associate General Counsel Harrisburg, PA 17105-8469 Exelon Generation Company, LLC 4300 Winfield Road Board of Supervisors Warrenville, IL 60555 Peach Bottom Township 545 Broad Street Ext.

Plant Manager Delta, PA 17314-9203 Peach Bottom Atomic Power Station Exelon Generation Company, LLC Mr. Richard McLean 1848 Lay Road Power Plant and Environmental Delta, PA 17314 Review Division Department of Natural Resources Regulatory Assurance Manager B-3, Tawes State Office Building Peach Bottom Atomic Power Station Annapolis, MD 21401 Exelon Generation Company, LLC 1848 Lay Road Dr. Judith Johnsrud Delta, PA 17314 National Energy Committee Sierra Club Resident Inspector 433 Orlando Avenue U.S. Nuclear Regulatory Commission State College, PA 16803 Peach Bottom Atomic Power Station P.O. Box 399 Manager-Financial Control & Co-Owner Delta, PA 17314 Affairs Public Service Electric and Gas Company Regional Administrator, Region I P.O. Box 236 U.S. Nuclear Regulatory Commission Hancocks Bridge, NJ 08038-0236 475 Allendale Road King of Prussia, PA 19406 Manager Licensing-Peach Bottom Atomic Power Station Mr. Roland Fletcher Exelon Generation Company, LLC Department of Environment 200 Exelon Way, KSA -3E Radiological Health Program Kennett Square, PA 19348 2400 Broening Highway Baltimore, MD 21224 Correspondence Control Desk Exelon Generation Company, LLC P. O. Box 160 Kennett Square, PA 19348

Peach Bottom Atomic Power Station, Unit Nos. 2 and 3 cc:

Vice President - Licensing and Regulatory Affairs Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Vice President-Operations Mid-Atlantic 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 Director-Licensing and Regulatory Affairs Exelon Generation Company, LLC 200 Exelon Way, KSA 3-E Kennett Square, PA 19348