ML060400243

Request for Additional Information (RAI) - Susquehanna Steam Electric Station, Units 1 and 2 (SSES 1 and 2) - Power Range Neutron Monitor System Digital Upgrade (TAC MC7486 & MC7487)

ML060400243
Person / Time
Site:	Susquehanna
Issue date:	02/09/2006
From:	Richard Guzman Plant Licensing Branch III-2
To:	Mckinney B Susquehanna
Guzman R, NRR/DLPM 415-1030
References
TAC MC7486, TAC MC7487
Download: ML060400243 (6)

Text

February 9, 2006Mr. Britt T. McKinneySr. Vice President and Chief Nuclear Officer PPL Susquehanna, LLC 769 Salem Blvd., NUCSB3Berwick, PA 18603-0467

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) - SUSQUEHANNA STEAMELECTRIC STATION, UNITS 1 AND 2 (SSES 1 AND 2) - POWER RANGE NEUTRON MONITOR SYSTEM DIGITAL UPGRADE (TAC NOS. MC7486 AND MC7487)

Dear Mr. McKinney:

In reviewing your submittal dated June 27, 2005, and your supplemental letter dated December 1, 2005, concerning a request to implement a digital upgrade to the Power Range Neutron Monitor System for SSES 1 and 2, the Nuclear Regulatory Commission staff has determined that additional information contained in the enclosure to this letter is needed to complete its review. These questions were discussed with your staff during a teleconference on February 1, 2006. 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 ManagerPlant Licensing Branch I-1 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket Nos. 50-387 and 50-388

Enclosure:

RAIcc w/encl: See next page February 9, 2006Mr. Britt T. McKinneySr. Vice President and Chief Nuclear Officer PPL Susquehanna, LLC 769 Salem Blvd., NUCSB3Berwick, PA 18603-0467

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) - SUSQUEHANNA STEAMELECTRIC STATION, UNITS 1 AND 2 (SSES 1 AND 2) - POWER RANGE NEUTRON MONITOR SYSTEM DIGITAL UPGRADE (TAC NOS. MC7486 AND MC7487)

Dear Mr. McKinney:

In reviewing your submittal dated June 27, 2005, and your supplemental letter dated December 1, 2005, concerning a request to implement a digital upgrade to the Power Range Neutron Monitor System for SSES 1 and 2, the Nuclear Regulatory Commission staff has determined that additional information contained in the enclosure to this letter is needed to complete its review. These questions were discussed with your staff during a teleconference on February 1, 2006. 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 ManagerPlant Licensing Branch I-1 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket Nos. 50-387 and 50-388

Enclosure:

RAIcc w/encl: See next pageDISTRIBUTION

PublicRidsOgcMailCenterRGuzmanBSingalLPLI-1 R/FRidsNrrDorlLplaSLittleRBeacomRidsNRRDeEicb RidsAcrsAcnwMailCenter* Provided RAI by memoAccession Number: ML060400243OFFICENRR/LPLI-1/PMNRR/LPLI-1/LANRR/EICB/CNRR/LPLI-1/CNAMERGuzmanSLittleAHowe *RLauferDATE2/09/062/09/062/8/062/09/06OFFICIAL RECORD COPY EnclosureREQUEST FOR ADDITIONAL INFORMATIONRELATING TO THEPOWER RANGE NEUTRON MONITOR SYSTEM DIGITAL UPGRADE FORSUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2 (SSES 1 AND 2)PPL SUSQUEHANNA, LLCDOCKET NOS. 50-387 AND 50-388The Nuclear Regulatory Commission (NRC) staff is reviewing the proposed license amendmentfor PPL Susquehanna, LLC (PPL, the licensee) to Facility Operating License No. NPF-14 andNPF-22 related to the installation of the General Electric (GE) Nuclear Measurement Analysis and Control (NUMAC) Power Range Neutron Monitor System (PRNMS) for SSES 1 and 2. The NRC staff has determined the additional information requested below will be needed tocomplete its review.1. Provide the analysis or reference document that links the configuration of the originalsystem desi gned, tested, and described in the NRC-approved GE Licensing TopicalReport NEDC-32410P-A, "Nuclear Measurement Analysis and Control Power Range Neutron Monitor Retrofit Plus Option III Stability Trip Function," and its Supplement 1, tothe configuration of the systems which will be installed at SSES 1 and 2. This analysisshould include any changes to the hardware, software, or processes used to fabricate

the system and the justifications that these changes do not affect the SSES 1 and 2system capability to meet the original protection system design requirements. For thesoftware-related process portion of this analysis, the NRC staff plans to focus on anychanges, to the following documents, identified in Branch Technical Position (BTP)

Instrumentation and Controls Branch (HICB)-14, "Guidance on Software Reviews for Digital Computer-Based Instrumentation and Control Systems":Software Management PlanDesign Specifications Software Development Plan Software Quality Assurance Plan Software Configuration Management Plan Software Safety Plan Design Safety Analysis Software V&V Plan V&V Change Report Configuration Management Change ReportSection 2, "Information to be Reviewed," of BTP HICB-14-7, explains that "theapplicant/licensee need not develop a separate document for each of the topicsidentified below; however, project documentation should encompass all of the topics." As a consideration for NRC staff review, since the actual documents will not besubmitted, please identify the procedure where the topic is found if a procedure, listedabove, was not specifically generated.2.In Section 3.3, "Plant Process Computer Impact," PPL discusses the data transmissionto be: "through a serial fiber-optic link to the new Multi-Vendor Data (acquisition system)(MVD) interface unit." Essentially, the data transmission path has changed from going through hardwire and the Oscillation Power Range Monitor (OPRM) module, to allprocess data going through the MVD module. The MVD will, in turn, transfer theinformation on an Ethernet bus to the plant process computer. Similarly, plant computer-calculated Local Power Range Monitor (LPRM) gain values and calculated core thermal power (to be used by the Average Power Range Monitor (APRM) to adjust the APRM gains) are transmitted via the Ethernet bus to the MVD, and onto thePRNMS. The NRC staff requests the following with regards to how the data is used andwhat transmission method is involved:A.Explain the extent of the operator involvement in the generation, review, and useof these new LPRM gain and calculated core thermal power values which can affect APRM and OPRM setpoints.B.Show how this communication provision (the two way communications pathbetween the PRNMS system and the plant computer) through the MVD, isconsistent with safety system-to-non-safety system separation and the isolationrequirements of Institute of Electrical and Electronics Engineers-279 in terms of data transmission, cyber security, and electrical isolation.

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

Robert A. SacconeVice President - Nuclear Operations PPL Susquehanna, LLC 769 Salem Blvd., NUCSB3Berwick, PA 18603-0467Aloysius J. Wrape, IIIGeneral Manager - Performance Improvement and Oversight PPL Susquehanna, LLC Two North Ninth Street, GENPL4 Allentown, PA 18101-1179Terry L. HarpsterGeneral Manager - Plant Support PPL Susquehanna, LLC 769 Salem Blvd., NUCSA4Berwick, PA 18603-0467Richard D. PagodinGeneral Manager - Nuclear Engineering PPL Susquehanna, LLC 769 Salem Blvd., NUCSB3Berwick, 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., NUCSA4Berwick, PA 18603-0467Michael H. CrowthersSupervising Engineer Nuclear Regulatory Affairs PPL Susquehanna, LLC Two North Ninth Street, GENPL4 Allentown, PA 18101-1179Steven M. CookManager - Quality Assurance PPL Susquehanna, LLC 769 Salem Blvd., NUCSB2Berwick, PA 18603-0467Luis A. RamosCommunity Relations Manager, Susquehanna PPL Susquehanna, LLC 634 Salem Blvd., SSO Berwick, PA 18603-0467Bryan A. Snapp, EsqAssoc. 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, NUCSA4 Berwick, PA 18603-0035Regional Administrator, Region 1U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Susquehanna Steam Electric Station, Unit Nos. 1 and 2 cc:

Board of SupervisorsSalem Township

P.O. Box 405 Berwick, PA 18603-0035Dr. Judith JohnsrudNational Energy Committee Sierra Club 443 Orlando Avenue State College, PA 16803