G. Sliter, EPRI N. Wilmshurst, EPRI J. Carey, EPRI F. Polaski, Exelon Corp. Nuclear Safety Symposium Seoul, Korea 1 April 2005 Status of License Renewal & Equipment Long- Term Planning in the USA

2 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Outline Operating plant License Renewal Status License Renewal Requirements Aging Management for License Renewal Equipment Long-Term Planning EPRI Technical Support

3 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. License Renewal Plant Applications for License Renewal Source: NRC - Updated 11/04

4 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Renewed License Status Expect all 104 units to be relicensed eventually 30 Granted 18 Under NRC Review 20 Intend to Renew Source: U.S. Nuclear Regulatory Commission

5 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. NRC Role in License Renewal License Renewal Rule – 10 CFR 54 Nuclear Energy Institute (NEI) Guideline for License Renewal – NEI Rev. 5 –95-10 sets contents and format for license renewal application (LRA) Previous License Renewal Applications and NRC Safety Evaluation Reports (SERs) set the standard

6 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. License Renewal Implementation Process NEI Identify LR scope -- Systems, Structures, Components (SSCs) and their intended functions relevant to safety Methods to identify SSCs subject to aging management review Methods for demonstrating that effects of aging are adequately managed by plant programs Maintain Design Basis of plant during extended term Identify Time-Limited Aging Analyses

7 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. License Renewal SSCs in Scope License Renewal does not look at the entire plant. Included are –Safety related systems, structures and components –Non-safety related that can fail and impact safety related SSCs –SSCs for 5 regulated events Environmental Qualification Fire Protection Anticipated Transient Without Scram Station Black Out Pressurized Thermal Shock

8 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Time Limited Aging Analysis Calculations for in-scope SSCs that –involve aging –are the basis for a safety determination –involve a time period of 40 years or more –involve capability to perform intended functions, and –are in the current licensing basis. Must show that SSC can function for 60 years, or that the effects of aging can be managed.

9 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Aging Management for License Renewal Aging management is required for in-scope components and structures that are passive and long-lived –Passive means component performs intended function without moving parts or change of properties; e.g. pipe, electrical cables, structures –Long-lived means not subject to replacement based on a qualified life or specified time period such as for EQ components, oil filters, or ventilation filters Aging review is the main feature of so-called Integrated Plant Assessment (IPA)

10 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Aging Management Must demonstrate that aging of components and structures can be managed such that aging degradation can be prevented and/or detected and corrected before the component fails Aging Management requires identification of –component function –material –internal and external environments –aging effects (due to aging mechanisms) and –Aging Management Programs (AMP) Aging of active components covered by Maintenance Rule, operational surveillances, normal operations Aging of short-lived components covered by other programs – EQ, Fire Protection Equipment, normal maintenance

11 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Plant Activities/Documents Related to Aging Management Consideration of long-term aging and vulnerabilities NRC Maintenance Rule NRC License Renewal Generic Aging Lessons Learned (GALL) License Renewal Aging Management Reviews (AMR) NRC Standard Review Plan Equipment Qualification (EQ) Standards INPO AP-913 Equipment Reliability Process EPRI Preventive Maintenance Basis Reliability Centered Maintenance (RCM) Preventive Maintenance Optimization (PMO)

12 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. NRC Review Criteria NRC Review Standards –Standard Review Plan NUREG 1800 –Generic Aging Lessons Learned (GALL) Report NUREG 1801 GALL documents the AMPs that are generically accepted by US NRC for managing the effects of aging

13 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Aging Management Programs (AMPs) About 40 for each LR application Most are existing programs –Some need enhancement to match GALL –The application can justify exceptions to GALL A few new programs are identified in some applications and SERs –e.g. One time inspections, AMPs for electrical cables, underground structures and components New inspections have insignificant impact on plants Most new or enhanced AMPs are readily accepted by the plant as good ideas Must be implemented prior to entering the period of extended operation

14 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Typical Table from NRC GALL Report

15 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Economic Impacts of License Renewal The small amount of inspections, monitoring, etc. required between now and the end of the original license term has an insignificant financial impact on plant operation. Additional inspections after the original term (mostly one time) can be performed by plant staff with an expected cost of less than $1M. NRC requires confirmation inspections for SSCs covered by chemistry programs (for example, one-time inspection to confirm wall thickness of feedwater piping subject to thinning). Other LR activities at or beyond end of original term include –Testing of underground cables for water treeing –Inspection of aboveground cables subject to adverse environment –Selective testing of underground concrete for degradation due to leaching

16 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Terminology “License Renewal” vs “Life Extension” License renewal provides a “ticket” for operation beyond the original licensed term and stabilizes regulatory requirements Decision to actually continue operation beyond original licensed term is an economic one in the U.S. It is useful to distinguish between the terms “License Renewal” and “Life Extension/PLEX” (the term Extended Operating Term is more appropriate than PLEX)

17 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Economic Impacts of Life Extension License renewal is a prerequisite, not a requirement, to operate beyond current 40 year license; cost of LR is small ($15 to $20 Million) -- provides option to run beyond 40 years Operating term extension is a licensee business decision License renewal cost does not include cost of equipment replacement/refurbishment that may be needed to operate beyond 40 years -- may be $200 Million or more Cost to replace some equipment needed for safe and economical operation are plant specific; examples are: –steam generator –pressurizer –main turbine and generator –large power transformers –feedwater heaters –main condenser –cooling towers

18 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Experience of Plants That Have Received Extended Term License Since almost none of the LR commitments are required until year 40 and no plants have reached this age, there has been virtually no impact on maintenance costs (Oldest plant with new license is Dresden 2, which will reach 60 years in December 2029.) Since renewed licenses were issued, there have been no new aging effects discovered (beyond those being considered by applicants) and no observed decrease in plant performance.

19 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. EPRI Technology Supporting License Renewal and Aging Management Pilot License Renewal Studies (Calvert Cliffs, Oconee) PWR & BWR Pressure Vessel Studies Component Aging Management Reviews US DOE Aging Management Guidelines. Artificial vs. Natural Aging of Cables Evaluation of Thermal Aging Embrittlement for Cast Austenitic Stainless Steel Components Summary of Generic License Renewal Technical Issues Mechanical, Structural, & Electrical LR “Tools” Generic Communications Database Aging Degradation Inspection Field Guide Many Reports from EPRI Materials Research Program MRP and BWR Vessel Internals Program (VIP)

20 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. License Renewal is One Part of the Broader Area of Asset Management Improved Plant Condition Maximum Plant Value Safety Asset Management Engineering/Maintenance -Equipment Long-Term Planning Equipment Criticality Aging Management Obsolescence License Renewal Increased Revenues Reduced Costs Optimum Resource Allocation Risk Management Physical Asset Management = Equipment Reliability Nuclear Asset Management = NAM Long-range Planning

21 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Equipment Reliability via INPO AP-913 Long-Term Planning/LCM in AP Scoping of Critical Components 2.Performance Monitoring 4. Continuing Equipment Reliability Improvement Preventive Maintenance Basis PM Assessment and Adjustment Operating Event Assessment Modifications 3. Corrective Action 6. Preventive Maintenance Implementation 5. Long-Term Strategies Problem-Related & Timely Assessments of: Component Health Vulnerability Logistics and Contingency Plans Obsolescence and Aging Life Cycle Management Asset Management Schedule Activities a a

22 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. SSC Long-Term Plan Definition An LTP is a compilation of a site’s integrated long-term activities, beyond the next cycle Examples of activities in an LTP include: –Design changes (modifications) –Significant PM’s –Significant equipment overhauls –Equipment replacement –Major inspection activities LTP is a technical and economic evaluation performed component by component – it must optimize reliability and plant economic value, while maintaining or improving safety

23 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Typical Economic Evaluation Results -- Current LTP (1A) and Three Alternative Plans LcmVALUE applied to about 16 equipment types at 11 US plants and to a main condenser at EDF

24 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. EPRI Technology Supporting Long-Term Planning in INPO AP-913 Long-Term Planning Process and Demonstration Long-Term Planning Software (LcmVALUE), Plant-specific LCM Plans for Several Component Types in Several Plants –generators, main condensers, instrument air, condensers, main steam valves, diesel generators, circuit breakers LCM “Sourcebooks” for Several Component Types (long- term planning generic information and data) –e.g. transformers, turbines, generators, main condensers Risk-Informed Asset Management Method EdF and Taipower LCM/NAM Seminars Long-Term Planning US Plant Benchmarking Study

25 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Current LR/Aging/LTP Projects at EPRI Service Water System Sourcebook Medium Voltage Sourcebook License Renewal Commitments Review Key Component Replacement Information Project License Renewal Mechanical Tools Update Long-Term Planning Knowledgebase

26 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. EPRI License Renewal Commitments Project Objective: Understand existing License Renewal Commitments and identify potential beneficial actions. The project will produce a: –Clear understanding of commitments and “best” techniques to address them –Identification of commitments for which techniques/technology can benefit from improvement Results will be used to identify needs for R&D

27 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Conclusions License renewal is a licensing process that allows Extended Operation -- no obligation to extend term Cost of license renewal is almost insignificant in overall cost of plant operation All 30 license renewal applications reviewed by U.S. NRC to date have been approved Expect all 104 US plants to renew licenses (no known obstacles) U.S. regulations allow multiple 20 year extensions Extended Operation is a business decision (substantial cost to refurbish and substantial economic benefit) Long-Term Planning benefits equipment reliability in both the near- and long-term

28 Copyright © 2005 Electric Power Research Institute, Inc. All rights reserved. Questions……