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Skip Navigation LinksEnhanced Fire Probabilistic Risk Assessment

​​​​​​​​​​​​​​Enhanced Fire Probabilistic Risk Assessment


Goal​​​

To develop a software tool that enhances fire-modeling capabilities and streamlines and simplifies fire probabilistic risk assessment (PRA) model development and maintenance, significantly reducing human effort and errors. The software tool is called Fire Risk in 3D (FRI3D).

Outc​​ome

Researchers will develop a fire-modeling software tool that includes features such as fire-modeling from scratch, time- and space-dependent fire simulation, automated PRA workflow and a three-dimensional (3D) view of fire-scenario progression.

The software will complement existing plant fire PRAs. It imports existing plant models and then combines the required tools and methods in a 3D environment. It is expected, based on a pilot project's results, that FRI3D will reduce fire-modeling efforts by up to 50%, cut turnaround time by up to 50%, and decrease user error by 90% or more. This tool will also be used for research and development of enhanced time-dependent methods to improve the realism of scenario modeling and reduce undue conservatism.

​Planned Major Accomplishments

  • ​2024—Finalize FRI3D for industry technology transfer and evaluate FRI3D for other external hazards (e.g., flood); collaborate with Japan's Central Research Institute of Electric Power Industry to include testing of additional simulation features and incorporation of arc flash into scenarios.


Related Reports

 

 

FRI3D Industry Adoption and Verification Tasks, INL/RPT-23-74213 275759This report outlines several updates and additions that were made to help meet industry needs before it can be fully transferred to an industry partner for commercial use. Examples include software verification features and a library of commercially used fire sources. This report also goes over work for industry adoption, including a fire analys is pilot study done for a nuclear power plant modification. This pilot study showed a time comparison between using FRI3D and current methods used by fire analysis experts and an evaluation from the experts on the potential for use by industry. This report outlines several updates and additions that were made to help meet industry needs before it can be fully transferred to an industry partner for commercial use. Examples include software verification features and a library of commercially used fire sources. This report also goes over work for industry adoption, including a fire analys is pilot study done for a nuclear power plant modification. This pilot study showed a time comparison between using FRI3D and current methods used by fire analysis experts and an evaluation from the experts on the potential for use by industry. 8/28/2023 6:23:04 PMINL/RPT‐23‐74213 Light Water Reactor Sustainability Program FRI3D Industry Adoption and Verification Tasks August 2023  U.S. Department of Energy Office of Nuclear Energy 44https://lwrs.inl.gov/RiskInformed Safety Margin Characterization/Forms/AllItems.aspxpdfFalsepdf
FRI3D Fire Simulation Options and Verification Tasks, INL/RPT-23-70843265342The Fire Risk Investigation in 3D (FRI3D) software was developed at the Idaho National Laboratory under the Risk-Informs System Analysis pathway under the Light Water Reactor Sustainability Program. This software combines the multiple tools used by industry for fire modeling with the plant risk analysis and 3D spatial information.The Fire Risk Investigation in 3D (FRI3D) software was developed at the Idaho National Laboratory under the Risk-Informs System Analysis pathway under the Light Water Reactor Sustainability Program. This software combines the multiple tools used by industry for fire modeling with the plant risk analysis and 3D spatial information.1/31/2023 3:00:41 PMINL/RPT-23-70843 Revision 0 Light Water Reactor Sustainability Program FRI3D Fire Simulation Options and Verification Tasks January 2023 U.S. Department of Energy Office of 361https://lwrs.inl.gov/RiskInformed Safety Margin Characterization/Forms/AllItems.aspxpdfFalsepdf
Risk-Informed Analysis for Enhanced Resilient Nuclear Power Plant with Initiatives including ATF, FLEX, and Advanced Battery Technology, INL/EXT-21-64546234758Risk-Informed Analysis for Enhanced Resilient Nuclear Power Plant with Initiatives including ATF, FLEX, and Advanced Battery Technology, INL/EXT-21-64546Risk-Informed Analysis for Enhanced Resilient Nuclear Power Plant with Initiatives including ATF, FLEX, and Advanced Battery Technology, INL/EXT-21-645469/29/2021 6:47:28 PMU.S. Department of Energy Office of Nuclear Energy This information was prepared as an account of work sponsored by an agency of the U.S. Government The purpose of the RISA Pathway 380https://lwrs.inl.gov/RiskInformed Safety Margin Characterization/Forms/AllItems.aspxpdfFalsepdf
Industry Level Integrated FRI3D, INL/EXT-21-64079231565Industry Level Integrated Fire Modeling Using Fire Risk Investigation in 3D (FRI3D), INL/EXT-21-6407Industry Level Integrated Fire Modeling Using Fire Risk Investigation in 3D (FRI3D), INL/EXT-21-64078/31/2021 10:47:33 PMINL/EXT-21-604079 Light Water Reactor Sustainability Program Industry Level Integrated Fire Modeling Using Fire Risk Investigation in 3D (FRI3D) August 2021 U.S. Department of 338https://lwrs.inl.gov/RiskInformed Safety Margin Characterization/Forms/AllItems.aspxpdfFalsepdf
Risk-Informed ATF and FLEX Analysis for an Enhanced Resilient BWR Under Design-Basis and Beyond-Design-Basis Accidents, INL/EXT-20-59906205242Risk-Informed ATF and FLEX Analysis for an Enhanced Resilient BWR Under Design-Basis and Beyond-Design-Basis Accidents, INL/EXT-20-59906Risk-Informed ATF and FLEX Analysis for an Enhanced Resilient BWR Under Design-Basis and Beyond-Design-Basis Accidents, INL/EXT-20-599064/13/2021 7:16:42 PMU.S. Department of Energy Office of Nuclear Energy This information was prepared as an account of work sponsored by an agency of the U.S. Government The purpose of the RISA Pathway 170https://lwrs.inl.gov/RiskInformed Safety Margin Characterization/Forms/AllItems.aspxpdfFalsepdf
FRI3D Tool and Methods Demonstration for Enhanced Fire Modeling, INL/EXT-20-59506207591Fire Risk Investigation in 3D (FRI3D) Tool and Methods Demonstration for Enhanced Fire Modeling, INL/EXT-20-59506Fire Risk Investigation in 3D (FRI3D) Tool and Methods Demonstration for Enhanced Fire Modeling, INL/EXT-20-595069/22/2020 4:12:47 PMFire Risk Investigation in 3D (FRI3D) Software and Process for Integrated Fire Modeling This information was prepared as an account of work sponsored by an agency of the U.S. 916https://lwrs.inl.gov/RiskInformed Safety Margin Characterization/Forms/AllItems.aspxpdfFalsepdf
Risk Importance Ranking of Fire Data Parameters to Enhance Fire PRA Model Realism, INL/EXT-20-0021255371Risk Importance Ranking of Fire Data Parameters to Enhance Fire PRA Model Realism, INL/EXT-20-00212Risk Importance Ranking of Fire Data Parameters to Enhance Fire PRA Model Realism, INL/EXT-20-002126/1/2020 5:15:08 PMU.S. Department of Energy Office of Nuclear Energy This information was prepared as an account of work sponsored by an agency of the U.S. Government The level of fire risk and the 546https://lwrs.inl.gov/RiskInformed Safety Margin Characterization/Forms/AllItems.aspxpdfFalsepdf
Fuel Rod Burst Potential Evaluation under LOCA Conditions for an Existing Plant with Extended Burnup Exceeding the Current Limit by 20%, INL/EXT-19-5588855421Fuel Rod Burst Potential Evaluation under LOCA Conditions for an Existing Plant with Extended Burnup Exceeding the Current Limit by 20%, INL/EXT-19-55888Fuel Rod Burst Potential Evaluation under LOCA Conditions for an Existing Plant with Extended Burnup Exceeding the Current Limit by 20%, INL/EXT-19-558889/30/2019 6:50:04 PMU.S. Department of Energy Office of Nuclear Energy This information was prepared as an account of work sponsored by an agency of the U.S. Government Hongbin Zhang 1 , Cole Blakely 1 809https://lwrs.inl.gov/RiskInformed Safety Margin Characterization/Forms/AllItems.aspxpdfFalsepdf
Risk-Informed Analysis for an Enhanced Resilient PWR with ATF, FLEX, and Passive Cooling, INL/EXT-19-5355655372Risk-Informed Analysis for an Enhanced Resilient PWR with ATF, FLEX, and Passive Cooling, INL/EXT-19-53556Risk-Informed Analysis for an Enhanced Resilient PWR with ATF, FLEX, and Passive Cooling, INL/EXT-19-535568/29/2019 5:17:59 PMU.S. Department of Energy Office of Nuclear Energy This information was prepared as an account of work sponsored by an agency of the U.S. Government The purpose of the RISA Pathway 483https://lwrs.inl.gov/RiskInformed Safety Margin Characterization/Forms/AllItems.aspxpdfFalsepdf
Industry Fire Modeling Enhancement Tools and Methods, INL/EXT-19-5441455426Industry Fire Modeling Enhancement Tools and Methods, INL/EXT-19-54414Industry Fire Modeling Enhancement Tools and Methods, INL/EXT-19-544146/27/2019 7:49:10 PMU.S. Department of Energy Office of Nuclear Energy This information was prepared as an account of work sponsored by an agency of the U.S. Government The report lays out the path 262https://lwrs.inl.gov/RiskInformed Safety Margin Characterization/Forms/AllItems.aspxpdfFalsepdf

​For more information contact:

Svetlana (Lana) Lawrence
Risk-Informed Systems Analysis, Pathway Lead
Idaho National Laboratory
Svetlana.Lawrence@inl.gov
Fri3d Software.png  

FRI3D software with the scenario's 3D simulation results on the left, showing the heat layers and only the source component failing (outlined in red).