IFRAM Handbook on Reactor Aging Management

Transcription

1 IFRAM Handbook on Reactor Aging Management I.S. Hwang a, T. Shoji b, E.H. Han c, C.E. Carpenter d a Seoul National University, Seoul, Korea b Tohoku University, Tohoku, Japan c Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China d US Nuclear Regulatory Commission, Washington, DC. USA IAEA PLiM Meeting May 14-19, 2012 Salt Lake City, USA

2 Outlines: IFRAM Handbook 1. Problem Statement 2. Development Goals 3 Rationale and Approach 4. Work Plan and Issues 5. Summary and Future Work

3 1. Problem Statement Risk Mismanagement Surprises and/or Accident Media/Public Uproar Financial Loss Earthquake Corrosion Oxidation Fatigue Fretting Mihama Davis Besse Fukushima K-Kariwa Radiation Emb. Yankee Rowe NPP Creep Sagging Pickering TMI Clogging Plugging Many Kori Mistake Counterfeit Sabotage HLW Production Storm Tornado Regulatory Countermeasure Tsunami Flooding IP-3 Fukushima Browns Hamaoka Ferry Chernobyl Kori UlJin Missiles Terror Poor Materials &Fab. Political Drive to Slump Chem. Explosion Fire MUF Selected Examples

4 1. Problem Statement 10CFR50 Appendix A, GDC The principal design criteria establish the necessary design, fabrication, construction, testing, and performance requirements for structures, systems, and components important to safety; that is, structures, systems, and components that provide reasonable assurance that the facility can be operated without undue risk to the health and safety of the public. Annual sales electronics+information food energy Ten Trillion USD

5 2. Development Goals Spectrum of Proactive Aging Management Materials Safety and Security Configuration Natural Forces Materials Incompatibility Proactive Aging Management Degradation of SSC and Materials Degradation of Safety Security Configuration Safety Confidence Against Man-made Damages Uncertainty in Safety Margin Against Natural Forces

6 3. Rationale and Approach Proactive Risk Management SSC Risk Configuration Risk Human Error andterrorism Natural Forces Proactive Strategy Experience and Knowledge Database Fundamental Understanding Knowledge Confidence Building Risk Assessment & Prioritization IFRAM Handbook Experience, Understanding & Regulations Strategy & Tools Preventive Measure Preventive Measures Strategy Tools Experience Understanding Regulations

7 3. Rationale and Approach Proactive Aging Management Dissemination of Experiences and LTO Issues Prediction of Failures and Related Symptoms Prediction of Potential Sequence of Event & Consequences Assessment of Confidence of Prediction Identification of Gaps and Action Priorities Interfacing with Plant Operation and Maintenance Interfacing with IFRAM Programs Updating Knowledge on Risk and Confidence Materials Aging and Degradation Configuration Aging and Degradation Risk-Confidence Knowledge Aging

8 3, Rationale and Approach Experience, Understanding & Regulations Regulatory Process & System Licensing Basis for Aging Management Code, Standards, Guidelines and Database Strategy & Tools Organizational Structure Proactive Management Procedures Quality and Culture Assurance Confidence Building Review of Aging Management Review of Aging Mechanism and Effect Preventive Measures Strategy Tools Plant Specific Approach Common Aging Issues for R&D Experience Understanding Regulations

9 4. Work Plan and Issues IFRAM Handbook Task Force Plan Phased Approach Phase 1: Focused on SSC Management, by Dec Proactive Aging Management Degradation of SSC and Materials Old-dating of Plant Configuration Safety Confidence Against Man-made Damages Uncertainty in Safety Margin Against Natural Forces Phase 1 Phase 2 Phase 3 Phase 4

10 4. Work Plan and Issues IFRAM Task Force Plan for Handbook Version 0 Introduction (Hwang/Shoji-10 pages) Background (TBD, Shoji/Bond-20 pages) Structures, Systems and Components (Hwang) Aging mechanisms and effects (Shoji, Busby, Han) Regulatory framework (Carpenter, Gott) Aging management programs (Hwang) Organizational structures (Kanno) Case studies (Tsuruga) Summary (Hwang/Shoji) Expert Analysis Expert Author Chapter Leader User Feedback

11 4. Work Plan and Issues INL/EXT

12 4. Work Plan and Issues

13 4. Work Plan and Issues Confidence and Vigilance

14 4. Work Plan and Issues: Risk-informed System Approach MRP-75 as an Example Procedure Proactive Workflow & Goals Inspection & EAC Discovery Mechanism Identification Growth Rate Modeling Growth Prediction Failure Probability Next Inspection Deterministic -> Prob. Microscopic-> Atomistic K-based -> K- and ECP-based Deterministic -> Prob. Deterministic -> Prob. Deterministic -> Prob.

15 4. Work Plan and Issues: Challenges of IFRAM TF Time and Resources Phased Scope of Coverage Avoid Duplication Risk Quantification Assure Consistency Assure Accuracy Proof of Validity R&D Identification Expert Analysis Expert Author Chapter Leader User Feedback Dedication of Task Force Members Support of IFRAM Members User Group & Feedback User Group Feedback & Maintenance Public Access

16 5. Summary and Future Work IFRAM Handbook on Aging Management (IHBRAM) Proactive Management Handbook Phase One: SSC Phase Two: Configuration Phase Three: Man-made Impact Phase Four: Natural Impact In-house Handbook Public Sourcebook Future Work on Phase One Proactive Weld Reliability Proactive SG Tube Reliability Proactive Pressure Tube Reliability Risk-informed Integrity Assessment