Expanded Materials Degradation Analysis (EMDA) Volume 3: Aging of Reactor Pressure Vessels
[1];
[1];
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- ATI Consulting (United States)
- Central Research Inst. of Electric Power Industry (CRIEPI) (Japan)
- Electric Power Research Institute (EPRI), Palo Alto, CA (United States)
- Univ. of California, Santa Barbara, CA (United States)
- Nuclear Regulatory Commission, Rockville, MD (United States)
- Westinghouse Electric Company, Cranberry Township, PA (United States)
In NUREG/CR-6923 ORNL/TM-2013/532, "Expert Panel Report on Proactive Materials Degradation Assessment," referred to as the PMDA report, NRC conducted a comprehensive evaluation of potential aging-related degradation modes for core internal components, as well as primary, secondary, and some tertiary piping systems, considering operation up to 40 years. This document has been a very valuable resource, supporting NRC staff evaluations of licensees' aging management programs and allowing for prioritization of research needs.This report describes an expanded materials degradation assessment (EMDA), which significantly broadens the scope of the PMDA report. The analytical timeframe is expanded to 80 years to encompass a potential second 20-year license-renewal operating-period, beyond the initial 40-year licensing term and a first 20-year license renewal. Further, a broader range of structures, systems, and components (SSCs) was evaluated, including core internals, piping systems, the reactor pressure vessel (RPV), electrical cables, and concrete and civil structures. The EMDA uses the approach of the phenomena identification and ranking table (PIRT), wherein an expert panel is convened to rank potential degradation scenarios according to their judgment of susceptibility and current state of knowledge.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1513389
- Report Number(s):
- ORNL/TM-2018/1091; ORNL/TM-2013/532
- Country of Publication:
- United States
- Language:
- English
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