ML072490046

08/28/2007 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, 2007LICENSEE:PPL Susquehanna, LLCFACILITY: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 APPLICATIONThe 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 staff's 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 staff's D-RAIs.Enclosure 1 provides a listing of the participants and Enclosure 2 contains a listing of theD-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 RegulationDocket Nos. 50-387 and 50-388

Enclosures:

1. List of Participants

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

ML072490046OFFICEPM:RLRA:DLRLA:DLRBC:RLRA:DLRNAMEEGettysIKingDWrona for LLundDATE09/07/0709/07/0709/18/07 TELEPHONE CONFERENCE CALLSUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2LICENSE RENEWAL APPLICATIONLIST OF PARTICIPANTSAugust 28, 2007 and September 5, 2007PARTICIPANTSAFFILIATIONSEvelyn GettysU.S. Nuclear Regulatory Commission (NRC)Allen HiserNRC Andrew JohnsonNRC Duane FilchnerPPL Susquehanna, LLC (PPL)

Jeff WeikPPL Mike DetamorePPL Mike MayPPL DRAFT REQUESTS FOR ADDITIONAL INFORMATIONSUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2LICENSE RENEWAL APPLICATIONAugust 28, 2007 and September 5, 2007The 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 4.7.1-1In Section 4.7.1 of the SSES LRA, the licensee references Section 5.4.4.4 of the Final SafetyAnalysis Report (FSAR), Rev. 60, and then states that the main steam flow restrictors areresistant to erosion by comparing turbine inspection results made at the Dresden Unit 1 facilitythat revealed no noticeable effects from erosion on the stainless steel nozzle partitions.

a.Discuss any actual erosion rates that have been measured on mainsteam line flow restrictors at SSES or other nuclear plants. If there areno actual measured erosion rates available, discuss the basis forconcluding that the main steam flow restrictors are resistant to erosion,and include in the discussion a detailed comparison of turbine nozzlepartition and main steam flow restrictor materials. The materialscomparison should include such salient points as material specificationsused, chemistry limits of those specifications, and process controls formaterial 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 aminor effect on erosion-corrosion, and that very rough surfaces will erodemore rapidly than smooth surfaces. Has the licensee verified that theexposed surfaces of the main steam line flow restrictors are sufficientlysmooth to not undergo accelerated erosion?Discussion: The applicant's discussion of the historical precedence set by the FSAR, helpedto clarify an issue for the staff. Therefore, the staff decided to withdraw the question, and it willnot be sent as a formal RAI. D-RAI 4.7.1-2With an assumed erosion rate of 0.004 in. per year, the applicant stated that 40 years ofoperation 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. 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 thisquestion 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, andif 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 mainsteam 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, 2007DISTRIBUTION

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 28,2007 AND SEPTEMBER 5, 2007, BETWEEN THE U.S. NUCLEARREGULATORY COMMISSION AND PPL SUSQUEHANNA, LLC, CONCERNING DRAFT REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2, LICENSE RENEWAL APPLICATIONHARD COPY: DLR RFE-MAIL:PUBLICSSmith (srs3)

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RGuzman BRogers EGettys Susquehanna Steam Electric Station, Units 1 and 2 cc:Cornelius J. GannonVice President - Nuclear Operations PPL Susquehanna, LLC 769 Salem Blvd., NUCSB3 Berwick, PA 18603-0467Robert M. PaleyGeneral Manager - Plant Support PPL Susquehanna, LLC 769 Salem Blvd., NUCSB2 Berwick, PA 18603-0467Rocco R. SgarroManager - Nuclear Regulatory Affairs PPL Susquehanna, LLC Two North Ninth Street, GENPL4 Allentown, PA 18101-1179Walter E. MorrisseySupervising Engineer Nuclear Regulatory Affairs PPL Susquehanna, LLC 769 Salem Blvd., NUCSA4 Berwick, PA 18603-0467Michael H. CrowthersSupervising Engineer Nuclear Regulatory Affairs PPL Susquehanna, LLC Two North Ninth Street, GENPL4 Allentown, PA 18101-1179Ronald E. SmithGeneral Manager - Site Preparedness and Services PPL Susquehanna, LLC 769 Salem Blvd., NUCSA4 Berwick, PA 18603-0467 Steven M. CookManager - Quality Assurance PPL Susquehanna, LLC 769 Salem Blvd., NUCSB2 Berwick, PA 18603-0467Luis A. RamosCommunity Relations Manager, Susquehanna PPL Susquehanna, LLC 634 Salem Blvd., SSO Berwick, PA 18603-0467Bryan A. Snapp, Esq.Associate General Counsel PPL Services Corporation Two North Ninth Street, GENTW3 Allentown, PA 18101-1179Supervisor - Document Control ServicesPPL Susquehanna, LLC Two North Ninth Street, GENPL4 Allentown, PA 18101-1179Richard W. OsborneAllegheny Electric Cooperative, Inc.

212 Locust Street P.O. Box 1266 Harrisburg, PA 17108-1266Director, Bureau of Radiation ProtectionPennsylvania Department of Environmental Protection Rachel Carson State Office Building P.O. Box 8469 Harrisburg, PA 17105-8469Senior Resident InspectorU.S. Nuclear Regulatory Commission P.O. Box 35, NUCSA4Berwick, PA 18603-0035Regional Administrator, Region 1U.S. Nuclear Regulatory Commission

475 Allendale Road King of Prussia, PA 19406Board of SupervisorsSalem Township P.O. Box 405 Berwick, PA 18603-0035 Susquehanna Steam Electric Station, Units 1 and 2 cc:-2-Dr. Judith JohnsrudNational Energy Committee Sierra Club 443 Orlando Avenue State College, PA 16803Ms. Julie KeysNuclear Energy Institute 1776 I Street, NW, Suite 400 Washington, DC 20006-3708