ML021990483
| ML021990483 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 07/18/2002 |
| From: | Anand R Division of Regulatory Improvement Programs |
| To: | |
| Anand R, NRR/DRIP, 415-1146 | |
| References | |
| Download: ML021990483 (7) | |
Text
July 18, 2002 APPLICANT: Exelon Generation Company, LLC (Exelon)
FACILITIES:
Peach Bottom Atomic Power Station, Units 2 and 3
SUBJECT:
TELECOMMUNICATION WITH EXELON GENERATING COMPANY TO DISCUSS INFORMATION IN SECTION 4.3.2 REACTOR VESSEL INTERNALS FATIGUE AND EMBRITTLEMENT OF THE PEACH BOTTOM LICENSE RENEWAL APPLICATION On June 17, 2002, after the NRC staff (hereafter referred to as the staff) reviewed information provided in Section 4.3.2 Reactor Vessel Internals Fatigue and Embrittlement, of the license renewal application (LRA), a conference call was conducted between the staff and representatives of Exelon Generating Company (hereafter referred to as the applicant) to discuss information presented in the application pertaining to Sections 4.3.2. The information discussed, the applicants responses, and the follow-up actions are provided below.
Participants of the June 17, 2002, conference call are enclosed.
The subject discussed was reactor vessel internals embrittlement analyses. Specifically, the staff stated that Section 4.3.2.2 of the Peach Bottom Atomic Power Station (PBAPS) License Renewal Application (LRA) indicates the high fluence locations in the top guide are exempt from inspection. BWRVIP-26, BWR Top Guide Inspection and Flaw Evaluation Guidelines, states that the threshold fluence beyond which the components will be significantly affected is 5 x 1020 nvt. Appendix C to BWRVIP-26 states that the generic fluence on the top guide for 60 years is 6 x 1021 nvt, which exceeds the 5 x 1020 nvt damage threshold.
The applicant stated that the location on the top guide that will see this high fluence is the grid beam. This is location 1, as identified in BWRVIP-26, Table 3-2, Matrix of Inspection Options.
In their evaluation of the top guide assembly, including the grid beam, General Electric (GE) assumed a lower allowable stress value, acknowledging the high fluence value at this location.
The conclusion from this analysis, coupled with the fact that there was no safety consequence of single failure at this location, the applicant indicated that no inspection was considered necessary.
The applicant stated that PBAPS, in the early 1990's, had performed UT inspection on the PBAPS grid beams and found no indications. In addition, at various times in the 1990s, PBAPS, Units 2 and 3, performed UT and/or VT-3 inspections on various cells and aligner pins, and found no indications. Per BWRVIP, there are no plans at this time to increase any inspection locations for the top guide. The applicant further stated that, in response to RAI 3.1-18 that was transmitted to the staff on May 2, 2002, Exelon is committed to follow the BWRVIP guidance. The staff is reviewing the applicants response. The applicant will provide this information in a letter to the NRC.
A draft of this telephone conversation summary was provided to the applicant to allow them the opportunity to comment on the contents of its input prior to the summary being issued.
/RA/
Raj K. Anand, Project Manager License Renewal and Environmental Impacts Program Division of Regulatory Improvement Programs Office of Nuclear Reactor Regulation Docket Nos. 50-277 and 50-278
Enclosure:
As stated cc w/enclosure: See next page A draft of this telephone conversation summary was provided to the applicant to allow them the opportunity to comment on the contents of its input prior to the summary being issued.
/RA/
Raj K. Anand, Project Manager License Renewal and Environmental Impacts Program Division of Regulatory Improvement Programs Office of Nuclear Reactor Regulation Docket Nos. 50-277 and 50-278
Enclosure:
As stated cc w/enclosure: See next page DISTRIBUTION:
See next page Document Name: C:\\ORPCheckout\\FileNET\\ML021990483.wpd OFFICE RLEP:PM RLEP:LA DE SC:RLEP NAME RAnand HBerilla BElliot SLee DATE 07/16/02 07/16/02 07/16/02 07/18/02 OFFICIAL RECORD COPY
DISTRIBUTION: Meeting Notice, Dated: July 18, 2002 HARD COPY RLEP RF E-MAIL:
PUBLIC J. Johnson W. Borchardt D. Matthews F. Gillespie RidsNrrDe R. Barrett E. Imbro G. Bagchi K. Manoly W. Bateman J. Calvo C. Holden P. Shemanski H. Nieh G. Holahan H. Walker S. Black B. Boger D. Thatcher G. Galletti C. Li J. Moore R. Weisman M. Mayfield A. Murphy W. McDowell S. Droggitis T. Kobetz RLEP Staff
TELECOMMUNICATION PARTICIPANTS NRC STAFF Raj Anand Barry Elliot EXELON Erach Patel Al Fulvio Kevin Muggleston Jerry Phillabaum Enclosure Peach Bottom Atomic Power Station, Units 2 and 3
cc:
Mr. Edward Cullen Vice President & General Counsel Exelon Generation Company, LLC 300 Exelon Way Kennett Square, PA 19348 Mr. J. Doering Site Vice President Peach Bottom Atomic Power Station 1848 Lay Road Delta, PA 17314 Mr. G. Johnston Plant Manager Peach Bottom Atomic Power Station 1848 Lay Road Delta, PA 17314 Mr. D. A. Henry Regulatory Assurance Manager Peach Bottom Atomic Power Station 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 R. D. #1 Delta, PA 17314 Public Service Commission of Maryland Engineering Division Chief Engineer 6 St. Paul Center Baltimore, MD 21202-6806 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
Peach Bottom Atomic Power Station Units 2 and 3 cc:
Mr. Jeffrey A. Benjamin Vice President-Licensing Exelon Generation Company, LLC 4300 Winfield Road Downers Grove, IL 60515 Mr. Michael P. Gallagher Director - Licensing Mid-Atlantic Regional Operating Group Exelon Generation Company, LLC 200 Exelon Way, KSA 3-E Kennett Square, PA 19348 Mr. Charles Pardee Senior Vice President Mid-Atlantic Regional Operating Group Exelon Generation Company, LLC 200 Exelon Way, KSA 3-N Kennett Square, PA 19348 Mr. John Skolds Chief Operating Officer Exelon Generation Company, LLC 4300 Winfield Road Downers Grove, IL 60515 Mr. William Bohlke Senior Vice President, Nuclear Services Exelon Generation Company, LLC 4300 Winfield Road Downers Grove, IL 60515 Mr. Jim Meister Senior Vice President, Operations Support Exelon Generation Company, LLC 4300 Winfield Road Downers Grove, IL 60515 Mr. Frederick W. Polaski Manager License Renewal Exelon Corporation 200 Exelon Way Kennett Square, PA 19348