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:RPB1 NAME IKing RAuluck JDozier JRobinson DPelton (Billy Rogers for) w/comments 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)

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Three Mile Island Nuclear Station, Unit 1 Director Bureau of Radiation Protection cc: Pennsylvania Department of Environmental Protection Site Vice President - Three Mile Island Rachel Carson State Office Building Nuclear Station, Unit 1 P.O. Box 8469 AmerGen Energy Company, LLC Harrisburg, PA 17105-8469 P.O. Box 480 Middletown, PA 17057 Plant Manager - Three Mile Island Nuclear Station, Unit 1 Senior Vice President - Operations, Mid- AmerGen Energy Company, LLC Atlantic P. O. Box 480 AmerGen Energy Company, LLC Middletown, PA 17057 200 Exelon Way, KSA 3-N Kennett Square, PA 19348 Regulatory Assurance Manager - Three Mile Island Nuclear Station, Unit 1 Vice President - Licensing and Regulatory AmerGen Energy Company, LLC Affairs P.O. Box 480 AmerGen Energy Company, LLC Middletown, PA 17057 4300 Winfield Road Warrenville, IL 60555 Ronald Bellamy, Region I U.S. Nuclear Regulatory Commission Regional Administrator 475 Allendale Road Region I King of Prussia, PA 19406 U.S. Nuclear Regulatory Commission 475 Allendale Road Michael A. Schoppman King of Prussia, PA 19406 Framatome ANP Suite 705 Chairman 1911 North Ft. Myer Drive Board of County Commissioners Rosslyn, VA 22209 of Dauphin County Dauphin County Courthouse Dr. Judith Johnsrud Harrisburg, PA 17120 National Energy Committee Sierra Club Chairman 433 Orlando Avenue Board of Supervisors State College, PA 16803 of Londonderry Township R.D. #1, Geyers Church Road Eric Epstein Middletown, PA 17057 TMI Alert 4100 Hillsdale Road Senior Resident Inspector (TMI-1) Harrisburg, PA 17112 U.S. Nuclear Regulatory Commission P.O. Box 219 Correspondence Control Desk Middletown, PA 17057 AmerGen Energy Company, LLC 200 Exelon Way, KSA 1-N-1 Director - Licensing and Regulatory Affairs Kennett Square, PA 19348 AmerGen Energy Company, LLC Correspondence Control P.O. Box 160 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 Fen 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 Fen is not conservative.

Request:

Provide additional information regarding the Fen 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 Fen is used for low alloy/carbon steel and another single value of Fen is used for Alloy 600 material, disregarding the locations/components that they are associated with.

Issue:

Fen is a function of strain rate, dissolved oxygen concentration, and temperature. Therefore, Fen 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 Fen 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.