ML082520573

Unit - 1, Request for Additional Information, License Renewal Application, Time Limited Aging Analysis

ML082520573
Person / Time
Site:	Three Mile Island
Issue date:	09/30/2008
From:	Jay Robinson License Renewal Projects Branch 1
To:	Gallagher M AmerGen Energy Co
Robinson, J NRR/DLR/RPB1 415-2878
References
TAC MD7701
Download: ML082520573 (6)

Text

September 30, 2008 Mr. Michael P. Gallagher Vice President License Renewal Projects AmerGen Energy Company, LLC 200 Exelon Way Kennett Square, PA 19348

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION FOR TIME LIMITED AGING ANALYSIS, THREE MILE ISLAND NUCLEAR STATION, UNIT 1, LICENSE RENEWAL APPLICATION (TAC NO. MD7701)

Dear Mr. Gallagher:

By letter dated January 8, 2008, AmerGen Energy Company, LLC (AmerGen) submitted an application pursuant to 10 CFR Part 54 to renew the operating license for Three Mile Island Nuclear Station, Unit 1, for review by the U.S. Nuclear Regulatory Commission (NRC or the staff). The staff is continuing to review the information contained in the license renewal application and has identified, in the enclosure, areas where additional information is needed to complete the review. Further requests for additional information may be issued in the future.

Items in the enclosure were discussed with Chris Wilson, of your staff, and a mutually agreeable date for the response is within 30 days from the date of this letter. If you have any questions, please contact me at 301-415-2878 or e-mail Jay.Robinson@nrc.gov. Sincerely, \RA\ Jay Robinson, Sr. Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-289

Enclosure:

As stated cc w/encl: See next page

ML082520573 OFFICE LA:DLR DLR:RER2 DLR:RER1 PM:DLR:RPB1 BC:DLR:RPB1NAME IKing RAuluck (Billy Rogers for) w/comments JDozier JRobinson DPelton DATE 9/16/08 9/24/08 9/24/08 9/26/08 9/30/08 Letter to AmerGen Energy Company, LLC from J. Robinson dated September 30, 2008 DISTRIBUTION

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION FOR TIME LIMITED AGING ANALYSIS, THREE MILE ISLAND NUCLEAR STATION, UNIT 1, LICENSE RENEWAL APPLICATION (TAC NO. MD7701)

E-MAIL: PUBLIC RidsNrrDlr RidsNrrDlrRpb1 RidsNrrDlrRpb2 RdsNrrDlrRer1 RidsNrrDlrRer2 RidsNrrDlrRerb RidsOgcMailCenter ------------- MModes, RI DKern JBrand RConte RBellamy PBamford Three Mile Island Nuclear Station, Unit 1 cc: Site Vice President - Three Mile Island Nuclear Station, Unit 1 AmerGen Energy Company, LLC P.O. Box 480 Middletown, PA 17057

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

Regional Administrator Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406

Chairman Board of County Commissioners of Dauphin County Dauphin County Courthouse Harrisburg, PA 17120 Chairman Board of Supervisors of Londonderry Township R.D. #1, Geyers Church Road Middletown, PA 17057 Senior Resident Inspector (TMI-1) U.S. Nuclear Regulatory Commission P.O. Box 219 Middletown, PA 17057

Director - Licensing and Regulatory Affairs AmerGen Energy Company, LLC Correspondence Control P.O. Box 160 Kennett Square, PA 19348 Director Bureau of Radiation Protection Pennsylvania Department of Environmental Protection Rachel Carson State Office Building P.O. Box 8469 Harrisburg, PA 17105-8469 Plant Manager - Three Mile Island Nuclear Station, Unit 1 AmerGen Energy Company, LLC P. O. Box 480 Middletown, PA 17057 Regulatory Assurance Manager - Three Mile Island Nuclear Station, Unit 1 AmerGen Energy Company, LLC P.O. Box 480 Middletown, PA 17057 Ronald Bellamy, Region I U.S. Nuclear Regulatory Commission

475 Allendale Road King of Prussia, PA 19406 Michael A. Schoppman Framatome ANP Suite 705 1911 North Ft. Myer Drive Rosslyn, VA 22209 Dr. Judith Johnsrud National Energy Committee Sierra Club 433 Orlando Avenue State College, PA 16803

Eric Epstein TMI Alert 4100 Hillsdale Road Harrisburg, PA 17112 Correspondence Control Desk AmerGen Energy Company, LLC 200 Exelon Way, KSA 1-N-1 Kennett Square, PA 19348 Three Mile Island Nuclear Station, Unit 1 cc: Manager Licensing - Three Mile Island Nuclear Station, Unit 1 Exelon Generation Company, LLC Correspondence Control P.O. Box 160 Kennett Square, PA 19348

Christopher M. Crane President and Chief Executive Officer AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555

Mr. Charles G. Pardee Chief Nuclear Officer AmerGen Energy Company, LLC 200 Exelon Way Kennett Square, PA 19348

Associate General Counsel AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555

Chief Operating Officer (COO) AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555

Frederick W. Polaski Manager License Renewal Exelon Nuclear 200 Exelon Way Kennett Square, PA 19348 Albert A. Fulvio License Renewal Senior Project Manager Exelon Nuclear 200 Exelon Way Kennett Square, PA 19348

REQUEST FOR ADDITIONAL INFORMATION TIME LIMITED AGING ANALYSIS THREE MILE ISLAND NUCLEAR STATION, UNIT 1 LICENSE RENEWAL APPLICATION RAI #: 4.3.2-1 LRA Section: 4.3.2, Evaluation of Reactor Water Environmental Effects on Fatigue Life of Piping and Components (Generic Safety Issue 190)

Background:

Under the sub-section titled "Reduced Transient Cycle Administrative Limits - Pressurizer Surge Line" on page 4-31 of the License Renewal Application (LRA), the last sentence in the third paragraph states that "The F en environmental correction factors shown are the overall average for each analysis."

Issue:

It is unclear what is meant by "overall average for each analysis", for example, since it could mean the average of all transients together for a single location or the average of all transients together for all locations having the same material. Justification is necessary if the average involves data from multiple locations. Since fatigue is localized damage, cross location averaging of F en is not conservative.

Request:

Provide additional information regarding the F en environmental correction factors and explain how the correction factors shown are the overall average for each analysis.

RAI #: 4.3.2-2 LRA Section: 4.3.2, Evaluation of Reactor Water Environmental Effects on Fatigue Life of Piping and Components (Generic Safety Issue 190)

Background:

In Tables 4.3.2-1 and 4.3.2-5, (and some other intermediate tables) in the LRA, a single value of F en is used for low alloy/carbon steel and another single value of F en is used for Alloy 600 material, disregarding the locations/components that they are associated with.

Issue: F en is a function of strain rate, dissolved oxygen concentration, and temperature. Therefore, F en is expected to be different for each location because the strain rates are most likely different for each component and location.

ENCLOSURE Request: Clarify how F en is used for the various locations/components and materials.

RAI #: 4.7-1 LRA Section: 4.7, Loss of Prestress in Concrete Containment Tendons

Background:

For the GALL Report AMP X.S1 "Concrete Containment Tendon Prestress," the "Monitoring and Trending" program element states that estimated and measured prestressing forces are plotted against time and the predicted lower limit (PLL), MRV, and trending lines developed for the period of extended operation.

Issue: The plots or data for the historically inspected tendon forces, predicted forces, trend lines, and minimum required values (MRV) were not included in Section 4.7 of the LRA.

Request:

Provide log-year graphs of individual tendon forces versus 95% of the predicted force, and trend lines against MRV to confirm adequacy of the prestressing forces.