ML040910361

Request for Additional Information (RAI) - Minimum Critical Power Ratio Safety Limits

ML040910361
Person / Time
Site:	Susquehanna
Issue date:	03/31/2004
From:	Richard Guzman NRC/NRR/DLPM/LPD1
To:	Shriver B Susquehanna
Guzman R, NRR/DLPM 415-1030
References
TAC MC0837
Download: ML040910361 (5)

Text

March 31, 2004 Mr. Bryce L. Shriver Senior Vice President and Chief Nuclear Officer PPL Susquehanna, LLC 769 Salem Boulevard NUCSB3 Berwick, PA 18603-0467

SUBJECT:

SUSQUEHANNA STEAM ELECTRIC STATION, UNIT 2 - REQUEST FOR ADDITIONAL INFORMATION (RAI) - MINIMUM CRITICAL POWER RATIO SAFETY LIMITS (TAC NO. MC0837)

Dear Mr. Shriver:

In reviewing your application of September 16, 2003, the Nuclear Regulatory Commission staff has determined that additional information contained in the enclosure to this letter is needed to complete its review. We discussed this issue with your staff during a conference call on March 25, 2004. As we indicated during our conversation, we are enclosing a formal RAI. The enclosed questions have been revised from the draft RAI to exclude the questions that were answered during the conference call. As agreed to by your staff, we request you respond within 30 days of the date of this letter.

If you have any questions, please contact me at 301-415-1030.

Sincerely,

/RA/

Richard V. Guzman, Project Manager, Section 1 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-388

Enclosure:

RAI cc w/encl: See next page

March 31, 2004 Mr. Bryce L. Shriver Senior Vice President and Chief Nuclear Officer PPL Susquehanna, LLC 769 Salem Boulevard Berwick, PA 18603-0467

SUBJECT:

SUSQUEHANNA STEAM ELECTRIC STATION, UNIT 2 - REQUEST FOR ADDITIONAL INFORMATION (RAI) - MINIMUM CRITICAL POWER RATIO SAFETY LIMITS (TAC NO. MC0837)

Dear Mr. Shriver:

In reviewing your application of September 16, 2003, the Nuclear Regulatory Commission staff has determined that additional information contained in the enclosure to this letter is needed to complete its review. We discussed this issue with your staff during a conference call on March 25, 2004. As we indicated during our conversation, we are enclosing a formal RAI. The enclosed questions have been revised from the draft RAI to exclude the questions that were answered during the conference call. As agreed to by your staff, we request you respond within 30 days of the date of this letter.

If you have any questions, please contact me at 301-415-1030.

Sincerely,

/RA/

Richard V. Guzman, Project Manager, Section 1 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-388

Enclosure:

RAI cc w/encl: See next page DISTRIBUTION:

Public OGC BBixler, RI THaung FAkstulewicz SWall PDI-1 R/F RLaufer MOBrien ACRS RGuzman Accession Number: ML040910361 OFFICE PDI-1/PM PDI-2/LA SRXB/SC PDI-1/SC NAME RGuzman MOBrien FAkstulewicz RLaufer DATE 3/30/04 3/30/04 3/31/04 3/31/04 OFFICIAL RECORD COPY

REQUEST FOR ADDITIONAL INFORMATION RELATING TO PROPOSED AMENDMENT TO REVISE MINIMUM CRITICAL POWER RATIO SAFETY LIMITS PPL SUSQUEHANNA, LLC SUSQUEHANNA STEAM ELECTRIC STATION, UNIT 2 DOCKET NO. 50-388 The Nuclear Regulatory Commission staff is reviewing the proposed license amendment request to Facility Operating License No. NPF-22, relating to minimum critical power ratio safety limits (MCPRSL) dated September 16, 2003, and has found further clarification is needed as follows:

1. Provide a reference core loading pattern for Unit 2 Cycle 12 (U2C12) operation and a detailed description of the final core and fuel design to achieve a 24-month fuel reload cycle at the licensed rated power of 3489 MWt.

2. Identify the approved methodologies used in the U2C12 analysis and justify their applicability to the MCPRSL analysis for U2C12 operation. Also, identify the design documents (i.e. calculations) to support the proposed technical specification amendment, and provide a summary table or figure to show the number of rods that might experience boiling transition.

3. Provide a detailed description of the differences in calculating the mid-cycle U2C12 MCPRSL relative to the beginning-of-cycle U2C12 MCPRSL in terms of power distribution uncertainties and neutronic codes/methodologies used; and provide a detailed explanation of how the decrease in the MCPRSL is largely due to the incorporation of smaller power distribution uncertainties. Justify that the proposed MCPRSL reduction of 0.02 is conservative.

Enclosure

Susquehanna Steam Electric Station, Unit Nos. 1 and 2 cc:

Richard L. Anderson Dale F. Roth Vice President - Nuclear Operations Manager - Quality Assurance PPL Susquehanna, LLC PPL Susquehanna, LLC 769 Salem Blvd., NUCSB3 769 Salem Blvd., NUCSB2 Berwick, PA 18603-0467 Berwick, PA 18603-0467 Aloysius J. Wrape, III Herbert D. Woodeshick General Manager - Nuclear Assurance Special Office of the President PPL Susquehanna, LLC PPL Susquehanna, LLC Two North Ninth Street, GENPL4 634 Salem Blvd., SSO Allentown, PA 18101-1179 Berwick, PA 18603-0467 Terry L. Harpster Bryan A. Snapp, Esq General Manager - Plant Support Assoc. General Counsel PPL Susquehanna, LLC PPL Services Corporation 769 Salem Blvd., NUCSA4 Two North Ninth Street, GENTW3 Berwick, PA 18603-0467 Allentown, PA 18101-1179 Robert A. Saccone Supervisor - Document Control Services General Manager - Nuclear Engineering PPL Susquehanna, LLC PPL Susquehanna, LLC Two North Ninth Street, GENPL4 769 Salem Blvd., NUCSB3 Allentown, PA 18101-1179 Berwick, PA 18603-0467 Richard W. Osborne Rocco R. Sgarro Allegheny Electric Cooperative, Inc.

Manager - Nuclear Regulatory Affairs 212 Locust Street PPL Susquehanna, LLC P.O. Box 1266 Two North Ninth Street, GENPL4 Harrisburg, PA 17108-1266 Allentown, PA 18101-1179 Director - Bureau of Radiation Protection Walter E. Morrissey Pennsylvania Department of Supervising Engineer Environmental Protection Nuclear Regulatory Affairs P.O. Box 8469 PPL Susquehanna, LLC Harrisburg, PA 17105-8469 769 Salem Blvd., NUCSA4 Berwick, PA 18603-0467 Senior Resident Inspector U.S. Nuclear Regulatory Commission Michael H. Crowthers P.O. Box 35, NUCSA4 Supervising Engineer Berwick, PA 18603-0035 Nuclear Regulatory Affairs PPL Susquehanna, LLC Regional Administrator, Region 1 Two North Ninth Street, GENPL4 U.S. Nuclear Regulatory Commission Allentown, PA 18101-1179 475 Allendale Road King of Prussia, PA 19406

Susquehanna Steam Electric Station, Unit Nos. 1 and 2 cc:

Board of Supervisors Salem Township P.O. Box 405 Berwick, PA 18603-0035 Dr. Judith Johnsrud National Energy Committee Sierra Club 443 Orlando Avenue State College, PA 16803