ML072490046

and 09/05/2007 Summary of Telephone Conference Calls Between the U.S. Nuclear Regulatory Commission and PPL Susquehanna, LLC, Concerning D-RAI

ML072490046
Person / Time
Site:	Susquehanna
Issue date:	09/18/2007
From:	Gettys E NRC/NRR/ADRO/DLR/RLRA
To:	Susquehanna
Gettys Evelyn, NRR/DLR/RLRA 415-4029
References
Download: ML072490046 (8)

Text

September 18, 2007 LICENSEE: PPL Susquehanna, LLC FACILITY: Susquehanna Steam Electric Station, Units 1 and 2

SUMMARY

OF TELEPHONE CONFERENCE CALLS HELD ON AUGUST 28, 2007 AND SEPTEMBER 5, 2007, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PPL SUSQUEHANNA, LLC, CONCERNING DRAFT REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of PPL Susquehanna, LLC held telephone conference calls on August 28, 2007 and September 5, 2007, to discuss and clarify the staffs draft requests for additional information (D-RAIs) concerning the Susquehanna Steam Electric Station, Units 1 and 2, license renewal application. The telephone conference calls were useful in clarifying the intent of the staffs D-RAIs. provides a listing of the participants and Enclosure 2 contains a listing of the D-RAIs discussed with the applicant, including a brief description on the status of the items.

The applicant had an opportunity to comment on this summary.

/RA/

Evelyn Gettys, Project Manager License Renewal Branch A Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-387 and 50-388

Enclosures:

1. List of Participants

2. List of Draft Requests for Additional Information cc w/encls: See next page

ML072490046 OFFICE PM:RLRA:DLR LA:DLR BC:RLRA:DLR NAME EGettys IKing DWrona for LLund DATE 09/07/07 09/07/07 09/18/07 TELEPHONE CONFERENCE CALL SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS August 28, 2007 and September 5, 2007 PARTICIPANTS AFFILIATIONS Evelyn Gettys U.S. Nuclear Regulatory Commission (NRC)

Allen Hiser NRC Andrew Johnson NRC Duane Filchner PPL Susquehanna, LLC (PPL)

Jeff Weik PPL Mike Detamore PPL Mike May PPL Enclosure 1

DRAFT REQUESTS FOR ADDITIONAL INFORMATION SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION August 28, 2007 and September 5, 2007 The U.S. Nuclear Regulatory Commission (NRC or the staff) and Representatives of PPL Susquehanna, LLC, held telephone conference calls on August 28, 2007 and September 5, 2007, to discuss and clarify the following draft requests for additional information (D-RAIs) concerning the Susquehanna Steam Electric Station (SSES), Units 1 and 2, license renewal application (LRA).

D-RAI 4.7.1-1 In Section 4.7.1 of the SSES LRA, the licensee references Section 5.4.4.4 of the Final Safety Analysis Report (FSAR), Rev. 60, and then states that the main steam flow restrictors are resistant to erosion by comparing turbine inspection results made at the Dresden Unit 1 facility that revealed no noticeable effects from erosion on the stainless steel nozzle partitions.

a. Discuss any actual erosion rates that have been measured on main steam line flow restrictors at SSES or other nuclear plants. If there are no actual measured erosion rates available, discuss the basis for concluding that the main steam flow restrictors are resistant to erosion, and include in the discussion a detailed comparison of turbine nozzle partition and main steam flow restrictor materials. The materials comparison should include such salient points as material specifications used, chemistry limits of those specifications, and process controls for material fabricated in the late 1950s (Dresden) vs. the early 1980s (Susquehanna).

b. Section 5.4.4.3 of the FSAR, Rev. 60, states that surface finish has a minor effect on erosion-corrosion, and that very rough surfaces will erode more rapidly than smooth surfaces. Has the licensee verified that the exposed surfaces of the main steam line flow restrictors are sufficiently smooth to not undergo accelerated erosion?

Discussion: The applicants discussion of the historical precedence set by the FSAR, helped to clarify an issue for the staff. Therefore, the staff decided to withdraw the question, and it will not be sent as a formal RAI.

D-RAI 4.7.1-2 With an assumed erosion rate of 0.004 in. per year, the applicant stated that 40 years of operation would only increase steam flow rate by 5 percent, and an additional 20 years of operation could be linearly extrapolated for a total increase in steam flow (and therefore dose) of 7.5 percent.

c. Discuss the basis for assuming an erosion rate of 0.004 in. per year, and include whether this is a conservative, realistic, or non-conservative assumption.

Enclosure 2

d. Provide a copy of the calculation used to establish the 5 percent increase in steam flow after 40 years of operation, including descriptions of all relevant parameters. Also include relevant dimensions of the main steam line flow restrictors when initially installed and at the most recent inspection.

Discussion: Based on the discussion with the applicant, the staff agreed to revise this question as follows. The revised question will be sent as a formal RAI.

RAI 4.7.1-1 The applicant stated that 40 years of operation would increase steam flow rate by no more than 5 percent, and an additional 20 years of operation could be linearly extrapolated for a total increase in steam flow (and therefore dose) of 7.5 percent.

a. Discuss the basis for assuming an erosion rate of 0.004 inches per year, and if this will be applicable for the term of extended operation. Include whether this is a conservative, realistic, or non-conservative assumption.

b. Provide a copy of a calculation that demonstrates the acceptability of the main steam flow restrictors for the license renewal period. Include descriptions of all relevant parameters and provide the basis and justification for all assumptions.

Memo to PPL Susquehanna, LLC from E. Gettys dated September 18, 2007 DISTRIBUTION:

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 28, 2007 AND SEPTEMBER 5, 2007, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PPL SUSQUEHANNA, LLC, CONCERNING DRAFT REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION HARD COPY:

DLR RF E-MAIL:

PUBLIC SSmith (srs3)

SDuraiswamy RidsNrrDlr RidsNrrDlrRlra RidsNrrDlrRlrb RidsNrrDlrRlrc RidsNrrDlrReba RidsNrrDlrRebb RidsNrrDci RidsNrrDra RidsNrrDe RidsNrrDeEemb RidsNrrDeEeeb RidsNrrDss RidsOgcMailCenter RidsNrrAdes RGuzman BRogers EGettys

Susquehanna Steam Electric Station, Units 1 and 2 cc:

Cornelius J. Gannon Luis A. Ramos Vice President - Nuclear Operations Community Relations Manager, PPL Susquehanna, LLC Susquehanna 769 Salem Blvd., NUCSB3 PPL Susquehanna, LLC Berwick, PA 18603-0467 634 Salem Blvd., SSO Berwick, PA 18603-0467 Robert M. Paley General Manager - Plant Support Bryan A. Snapp, Esq.

PPL Susquehanna, LLC Associate General Counsel 769 Salem Blvd., NUCSB2 PPL Services Corporation Berwick, PA 18603-0467 Two North Ninth Street, GENTW3 Allentown, PA 18101-1179 Rocco R. Sgarro Manager - Nuclear Regulatory Affairs Supervisor - Document Control Services PPL Susquehanna, LLC PPL Susquehanna, LLC Two North Ninth Street, GENPL4 Two North Ninth Street, GENPL4 Allentown, PA 18101-1179 Allentown, PA 18101-1179 Walter E. Morrissey Richard W. Osborne Supervising Engineer Allegheny Electric Cooperative, Inc.

Nuclear Regulatory Affairs 212 Locust Street PPL Susquehanna, LLC P.O. Box 1266 769 Salem Blvd., NUCSA4 Harrisburg, PA 17108-1266 Berwick, PA 18603-0467 Director, Bureau of Radiation Protection Michael H. Crowthers Pennsylvania Department of Supervising Engineer Environmental Protection Nuclear Regulatory Affairs Rachel Carson State Office Building PPL Susquehanna, LLC P.O. Box 8469 Two North Ninth Street, GENPL4 Harrisburg, PA 17105-8469 Allentown, PA 18101-1179 Senior Resident Inspector Ronald E. Smith U.S. Nuclear Regulatory Commission General Manager - Site Preparedness P.O. Box 35, NUCSA4 and Services Berwick, PA 18603-0035 PPL Susquehanna, LLC 769 Salem Blvd., NUCSA4 Regional Administrator, Region 1 Berwick, PA 18603-0467 U.S. Nuclear Regulatory Commission 475 Allendale Road Steven M. Cook King of Prussia, PA 19406 Manager - Quality Assurance PPL Susquehanna, LLC Board of Supervisors 769 Salem Blvd., NUCSB2 Salem Township Berwick, PA 18603-0467 P.O. Box 405 Berwick, PA 18603-0035

Susquehanna Steam Electric Station, Units 1 and 2 cc:

Dr. Judith Johnsrud National Energy Committee Sierra Club 443 Orlando Avenue State College, PA 16803 Ms. Julie Keys Nuclear Energy Institute 1776 I Street, NW, Suite 400 Washington, DC 20006-3708