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Title: Risk-Informed Margin Management (RIMM) Industry Applications IA1 - Integrated Cladding ECCS/LOCA Performance Analysis - Problem Statement

Abstract

The U. S. NRC is currently proposing rulemaking designated as “10 CFR 50.46c” to revise the LOCA/ECCS acceptance criteria to include the effects of higher burnup on cladding performance as well as to address some other issues. The NRC is also currently resolving the public comments with the final rule expected to be issued in the summer of 2016. The impact of the final 50.46c rule on the industry will involve updating of fuel vendor LOCA evaluation models, NRC review and approval, and licensee submittal of new LOCA evaluations or reanalyses and associated technical specification revisions for NRC review and approval. The rule implementation process, both industry and NRC activities, is expected to take 5-10 years following the rule effective date. The need to use advanced cladding designs is expected. A loss of operational margin will result due to the more restrictive cladding embrittlement criteria. Initial and future compliance with the rule may significantly increase vendor workload and licensee cost as a spectrum of fuel rod initial burnup states may need to be analyzed to demonstrate compliance. Consequently there will be an increased focus on licensee decision making related to LOCA analysis to minimize cost and impact, and to managemore » margin.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1369619
Report Number(s):
INL/EXT-15-35073
TRN: US1701933
DOE Contract Number:
AC07-05ID14517
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; LOSS OF COOLANT; CLADDING; ECCS; FUEL RODS; MANAGEMENT; Risk Informed Safety Margin Characterization

Citation Formats

Szilard, Ronaldo Henriques, Youngblood, Robert, Frepoli, Cesare, Yurko, Joseph P., Swindlehurst, Gregg, Zhang, Hongbin, Zhao, Haihua, Bayless, Paul D., Rabiti, Cristian, Alfonsi, Andrea, and Smith, Curtis L. Risk-Informed Margin Management (RIMM) Industry Applications IA1 - Integrated Cladding ECCS/LOCA Performance Analysis - Problem Statement. United States: N. p., 2015. Web. doi:10.2172/1369619.
Szilard, Ronaldo Henriques, Youngblood, Robert, Frepoli, Cesare, Yurko, Joseph P., Swindlehurst, Gregg, Zhang, Hongbin, Zhao, Haihua, Bayless, Paul D., Rabiti, Cristian, Alfonsi, Andrea, & Smith, Curtis L. Risk-Informed Margin Management (RIMM) Industry Applications IA1 - Integrated Cladding ECCS/LOCA Performance Analysis - Problem Statement. United States. doi:10.2172/1369619.
Szilard, Ronaldo Henriques, Youngblood, Robert, Frepoli, Cesare, Yurko, Joseph P., Swindlehurst, Gregg, Zhang, Hongbin, Zhao, Haihua, Bayless, Paul D., Rabiti, Cristian, Alfonsi, Andrea, and Smith, Curtis L. Wed . "Risk-Informed Margin Management (RIMM) Industry Applications IA1 - Integrated Cladding ECCS/LOCA Performance Analysis - Problem Statement". United States. doi:10.2172/1369619. https://www.osti.gov/servlets/purl/1369619.
@article{osti_1369619,
title = {Risk-Informed Margin Management (RIMM) Industry Applications IA1 - Integrated Cladding ECCS/LOCA Performance Analysis - Problem Statement},
author = {Szilard, Ronaldo Henriques and Youngblood, Robert and Frepoli, Cesare and Yurko, Joseph P. and Swindlehurst, Gregg and Zhang, Hongbin and Zhao, Haihua and Bayless, Paul D. and Rabiti, Cristian and Alfonsi, Andrea and Smith, Curtis L.},
abstractNote = {The U. S. NRC is currently proposing rulemaking designated as “10 CFR 50.46c” to revise the LOCA/ECCS acceptance criteria to include the effects of higher burnup on cladding performance as well as to address some other issues. The NRC is also currently resolving the public comments with the final rule expected to be issued in the summer of 2016. The impact of the final 50.46c rule on the industry will involve updating of fuel vendor LOCA evaluation models, NRC review and approval, and licensee submittal of new LOCA evaluations or reanalyses and associated technical specification revisions for NRC review and approval. The rule implementation process, both industry and NRC activities, is expected to take 5-10 years following the rule effective date. The need to use advanced cladding designs is expected. A loss of operational margin will result due to the more restrictive cladding embrittlement criteria. Initial and future compliance with the rule may significantly increase vendor workload and licensee cost as a spectrum of fuel rod initial burnup states may need to be analyzed to demonstrate compliance. Consequently there will be an increased focus on licensee decision making related to LOCA analysis to minimize cost and impact, and to manage margin.},
doi = {10.2172/1369619},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Apr 01 00:00:00 EDT 2015},
month = {Wed Apr 01 00:00:00 EDT 2015}
}

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