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{{#Wiki_filter:RIC     2024     Hybrid                                               MARCH 12-14, 2024
{{#Wiki_filter:RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024
#nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE MACCSimize Safety!
Office of Nuclear Regulatory Research Division of Systems Analysis Accident Analysis Branch


U.S. Nuclear Regulatory   Commission                                                       #nrcric2024 36thAnnual Regulatory   Information Conference                                           www.nrc.gov
RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024
#nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE What is the MACCS Consequence Analysis Code?
Overview The MACCS consequence analysis code was developed and is used to evaluate the offsite consequences of radioactive releases to the environment. MACCS models atmospheric transport, emergency and long-term protective actions, radioactive exposure pathways, dosimetry, health effects, and economic consequences.
MACCS outputs capture a variety of metrics, including dose, health effects, fatality risk, economic losses, and land contamination.
MACCS can be used for regulatory and cost-benefit analyses, environmental reports and impact statements, plant-specific evaluations of severe accident mitigation alternatives, U.S. Department of Energy documented safety analyses, probabilistic risk assessments, and numerous research studies.


MACCSimize                              S a fe t  y !
RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024
#nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE Consequence analysis: A fundamental tenet of safety regulation
* An important part of good regulation is estimating public consequence measures and using this knowledge to inform regulatory decisions.
* MACCS allows the NRC to estimate public consequence measures and provides a powerful tool to inform development of our regulations and guidance.


Office of Nuclear Regulatory Research Division  of Systems Analysis Accident Analysis Branch
RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024
#nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE
* 857 MACCS Users Americas 556 Asia 176 Europe 120 Africa 5
* 24 Cooperative Severe Accident Research Program (CSARP) Member Countries
* 149 Organizations Regulators, Researchers, Universities, and the Commercial Nuclear Industry MACCS Users Community


ADAPTING  TO A CHANGING LANDSCAPE RIC     2024       Hybrid                                                     MARCH 12-14, 2024
RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024
 
#nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE MACCS/WinMACCS MACCS is the main executable of the computer code.
U.S. Nuclear Regulatory  Commission                                                                  #nrcric2024 36thAnnual Regulatory  Information Conference                                                      www.nrc.gov
The NRC released MACCS version 4.2 in March 2023.
 
WinMACCS serves as the current user interface for MACCS. The NRC released WinMACCS version 4.2 in March 2023.
What is the MACCS Consequence Analysis Code?
The user interface is undergoing a modernization effort, which is expected to be completed by Summer 2024.
Overview The MACCS consequence analysis code was developed and is used to  evaluate the  offsite  consequences of  radioactive  releases to the environment. MACCS models atmospheric transport, emergency and long-term protective actions, radioactive exposure pathways, dosimetry, health effects, and economic consequences.
MACCS-HYbrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT)
* MACCS outputs  capture  a variety  of metrics, including dose, health effects, fatality  risk, economic losses, and land contamination.
Provides capability to perform high-fidelity Lagrangian atmospheric transport modeling. The NRC released MACCS-HYSPLIT version 1.2 in March 2023.
* MACCS can be used for regulatory and cost-benefit analyses, environmental reports and impact statements,  plant-specific evaluations of severe accident mitigation  alternatives, U.S. Department  of Energy documented safety  analyses, probabilistic risk assessments, and numerous research studies.
SecPop Generates site data from Census information. The NRC released SecPoP version 4.3.1 in July 2020.
 
SecPoP is being updated to include the 2020 US census data and code improvement upgrades (expected by Fall 2024).
ADAPTING  TO A CHANGING LANDSCAPE RIC 2024 Hybrid                                                  MARCH 12-14, 2024
MelMACCS Provides source term parameters to MACCS. The NRC released MelMACCS version 4.0 in September 2022.
 
MelMACCS is undergoing code improvement upgrades (expected by Winter 2024).
U.S. Nuclear Regulatory   Commission                                               #nrcric2024 36th Annual Regulatory   Information Conference                                   www.nrc.gov
AniMACCS Provides animation of plume segments of MACCS. The NRC released MelMACCS version 1.3.1 in January 2022.
 
MACCS Code Development Activities
Consequence analysis: A fundamental tenet of safety regulation
* A n important part of good regulation is estimating public consequence measures  and using this knowledge to inform regulatory decisions.
* MACCS allows the  NRC  to estimate  public consequence measures  and provides a powerful tool to  inform development of our regulations and guidance.
 
ADAPTING  TO A CHANGING LANDSCAPE RIC 2024 Hybrid                                                                                                                                                      MARCH 12-14, 2024
 
U.S. Nuclear Regulatory  Commission                                                                                                                                                                            #nrcric2024 36th Annual Regulatory  Information Conference                                                                                                                                                                www.nrc.gov
 
MACCS Users Community
* 857 MACCS Users
* Americas    556
* Asia                                                                                                                  176
* Europe                                                      120
* Africa                                                                              5
* 24  Cooperative Severe Accident Research Program (CSARP) Member Countries
* 149 Organizations
* Regulators, Researchers, Universities, and the Commercial Nuclear I ndustry
 
ADAPTING   TO A CHANGING LANDSCAPE RIC 2024 Hybrid                                                                                                                                    MARCH 12-14, 2024
 
U.S. Nuclear Regulatory  Commission                                                                                                                                                      #nrcric2024 36th Annual Regulatory  Information Conference                                                                                                                                        www.nrc.gov
 
MACCS Code Development Activities MACCS/WinMACCS                                                                                                   SecPop
* MACCS is the main executable of the computer code.
* Generates site  data from  Census information. The  NRC The NRC released MACCS version 4.2 in March 2023.                                                              released SecPoP version 4.3.1 in July 2020.
* WinMACCS                                                                                                   serves as the current user interface for
* SecPoP is being updated to include the 2020 US census data MACCS. The NRC released WinMACCS                                                                                               version 4.2 in and code improvement upgrades (expected by Fall 2024).
March 2023.
* The user interface is undergoing a modernization effort,       MelMACCS which is expected to be completed by Summer 2024.
* Provides source term  parameters to  MACCS. The  NRC MACCS-HYbrid                                                                                                                                                                                                                                                                                                                         Single-Particle                                                                                                                                             Lagrangian                                                                                                                                                                                                                                           Integrated released MelMACCS version 4.0 in September 2022.
Trajectory (HYSPLIT)
* MelMACCS  is  undergoing code  improvement upgrades
* Provides capability to perform high-fidelity Lagrangian                 (expected by Winter 2024).
 
atmospheric transport modeling. The NRC released                                                             AniMACCS MACCS-                                                                                     HYSPLIT version 1.2 in March 2023.
* Provides animation of plume segments of MACCS. The NRC released MelMACCS version 1.3.1 in January 2022.
 
ADAPTING  TO A CHANGING LANDSCAPE RIC 2024 Hybrid                                                  MARCH 12-14, 2024
 
U.S. Nuclear Regulatory  Commission                                                #nrcric2024 36th Annual Regulatory  Information Conference                                    www.nrc.gov


RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024
#nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE
* The MACCS-UI is undergoing a modernization effort with the key goal of ensuring long-term usability.
* The MACCS-UI is anticipated to offer a user interface and functionalities akin to WinMACCS.
* The MACCS-UI modernization is expected to be completed by Summer 2024.
Modernizing the MACCS User Interface (MACCS-UI)
Modernizing the MACCS User Interface (MACCS-UI)
* The MA CCS-UI  i s undergoi ng  a moderni zati on effort  wi th  the  key goal of ensuring long-term usabi li ty.
* The MA CCS-UI  i s anti ci pated  to offer a user i nterface and functi onali ti es aki n to  Wi nMA CCS.
* The MA CCS-UI  moderni zati on i s expected to be completed by Summer 2024.


ADAPTING  TO A CHANGING LANDSCAPE RIC 2024 Hybrid                                                                                                                                                                                                                 MARCH 12-14, 2024
RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024
#nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE The MACCS development team is currently working on several advanced reactor initiatives to ensure that the MACCS code continues to meet regulatory needs for consequence analysis.
Item Phenomenological Areas 2019 2020 2021 2022 2023 2024 Reports CA1 Atmospheric Transport and Dispersion (Nearfield Modeling) x x
x SAND2021-6924 CA2 Radionuclide Release Screening x
x SAND2022-12018 CA3 Radionuclide Release Screening (Atmospheric Transport and Dispersion & Dosimetry) x SAND2022-12766 CA4 Dosimetry and Health Effects (Tritium Modeling) x x
x SAND2022-12016 CA5 Radionuclide Evolution in Atmosphere x
x In progress MACCS Advanced Reactor Initiatives


U.S. Nuclear Regulatory   Commission                                                                                                                                                                                                                                                         #nrcric2024 36th Annual Regulatory   Information Conference                                                                                                                                                                                                                                           www.nrc.gov
RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024
 
#nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE Relevant Environmental Transformation Processes
MACCS Advanced Reactor Initiatives The MACCS development team  is currently working on several advanced reactor initiatives to ensure that the MACCS code continues to meet regulatory needs for consequence analysis.
*Chemical Reactions
 
*Oxidation
Item                                                                                                                                                                                                                                                                                                                                                                                                                Phenomenological Areas                                                                                                                                                                                                                                                                                                                                                                      2019                    2020                  2021              2022                  2023                    2024                                                                                                                                                        Reports
*Agglomeration
 
*Hygroscopicity Current MACCS Capabilities
CA1            Atmospheric Transport  and  Dispersion (Nearfield Modeling)                                                                                                                          x                                                                                    x                                                                                                            xSAND2021-                                                                                                                              6924
*Radionuclide Decay and Ingrowth
 
*Dry Deposition
CA2            Radionuclide Release Screening                                                                                                                                                                                          x                                                                                xSAND2022-                                                                                                                              12018 CA3            Radionuclide Release Screening  (Atmospheric  Transport                                                                                                                                                                                x                                                SAND2022-                                                                                                                              12766 and Dispersion & Dosimetry)
*Wet Deposition Other Atmospheric Transport and Dispersion Models
CA4            Dosimetry and Health Effects (Tritium Modeling)                                                                                                                                                                                          x                                                                                  x                                                                                                xSAND2022-                                                                                                                              12016
*HYSPLIT
 
*CMAQ
CA5            Radionuclide Evolution  in  Atmosphere                                                                                                                                                                                                                  x                                                                                                x                                                                                                                                                                        I n progress
*WRF-CHEM
 
*SORAMI
ADAPTING  TO A CHANGING LANDSCAPE RIC 2024 Hybrid                                                                MARCH 12-14, 2024
*RASCAL
 
*RATCHET MACCS Advanced Reactor Initiatives Radionuclide Evolution in the Atmosphere (Task CA5)
U.S. Nuclear Regulatory  Commission                                                                #nrcric2024 36th Annual Regulatory  Information Conference                                                    www.nrc.gov
 
MACCS Advanced Reactor Initiatives Radionuclide  Evolution in  the Atmosphere (Task  CA5)
 
Relevant                                               Other Atmospheric Environmental                 Current MACCS                  Transport and Transformation                 Capabilities              Dispersion Models Processes
* Chemical Reactions
* Radionuclide Decay and
* HYSPLI T
* Oxidation        I ngrowth
* CMAQ
* Agglomeration
* Dry Deposition
* WRF-CHEM
* Hygroscopicity
* Wet Deposition
* SORAMI
* RASCAL
* RATCHET
 
ADAPTING  TO A CHANGING LANDSCAPE RIC 2024 Hybrid                                                    MARCH 12-14, 2024
 
U.S. Nuclear Regulatory  Commission                                                  #nrcric2024 36th Annual Regulatory  Information Conference                                      www.nrc.gov


RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024
#nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE
* Future Focused Research Activities
* The NRC is researching using National Centers for Environmental Prediction data to support severe accident consequence analysis at locations without onsite meteorological data.
* Environmental Justice
* The NRC is planning to initiate research on how MACCS can use census data and other data sources to enable the reporting of community vulnerability indices for populations around a site. The NRC also plans to re-evaluate how MACCS models recovery decisions in low-income areas.
* Radionuclides Accident Consequence Analyses for Space Launch
* The United States is developing space nuclear systems where such systems safely enable or enhance space exploration or operational capabilities [NSPM-20].
MACCS Applications Supporting Other Emerging Areas
MACCS Applications Supporting Other Emerging Areas
* Future Focused Research Activities
* The NRC is researching  using National Centers  for Env ironmental Prediction  data to support sev ere accident  consequence  analysis at locations without  onsite meteorological data.
* Env i ronmental Justi ce
* The NRC is planning to initiate research on how  MACCS can use census data and other data sources to enable the reporting of community v ulnerability indices for populations around a site. The NRC also plans to re-ev aluate how  MACCS models recov ery decisions  in low-income areas.
* Radi onucli des A ccident Consequence  A nalyses for Space Launch
* The United  States is developing space nuclear systems where  such systems safely enable or enhance space exploration or operational capabilities [NSPM-20].
ADAPTING  TO A CHANGING LANDSCAPE RIC 2024 Hybrid                                              MARCH 12-14, 2024
U.S. Nuclear Regulatory  Commission                                        #nrcric2024 36th Annual Regulatory  Information Conference                              www.nrc.gov
Connect With Us PM MACCS Code Development & Applications Salman Haq,  salman.haq@nrc.gov Nazila Tehrani,  nazila.tehrani@nrc.gov
Code Distribution (MACCSCodes@nrc.gov)
A J Nosek, aj.nosek@nrc.gov
Branch Chief Lui s Betancourt,  luis.Betancourt@nrc.gov


Visit us at: https://maccs.sandia.gov/maccs.aspx ADAPTING  TO A CHANGING LANDSCAPE}}
RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024
#nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE Connect With Us PM MACCS Code Development & Applications Salman Haq, salman.haq@nrc.gov Nazila Tehrani, nazila.tehrani@nrc.gov Code Distribution (MACCSCodes@nrc.gov)
AJ Nosek, aj.nosek@nrc.gov Branch Chief Luis Betancourt, luis.Betancourt@nrc.gov Visit us at: https://maccs.sandia.gov/maccs.aspx}}

Latest revision as of 18:07, 24 November 2024

RIC 2024 Maccsimize Safety
ML24155A006
Person / Time
Issue date: 03/14/2024
From:
NRC/RES/DSA/AAB
To:
Nazila H. Tehrani 301-415-3684
References
Download: ML24155A006 (10)
v • d • e


Text

RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024

  1. nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE MACCSimize Safety!

Office of Nuclear Regulatory Research Division of Systems Analysis Accident Analysis Branch

RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024

  1. nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE What is the MACCS Consequence Analysis Code?

Overview The MACCS consequence analysis code was developed and is used to evaluate the offsite consequences of radioactive releases to the environment. MACCS models atmospheric transport, emergency and long-term protective actions, radioactive exposure pathways, dosimetry, health effects, and economic consequences.

MACCS outputs capture a variety of metrics, including dose, health effects, fatality risk, economic losses, and land contamination.

MACCS can be used for regulatory and cost-benefit analyses, environmental reports and impact statements, plant-specific evaluations of severe accident mitigation alternatives, U.S. Department of Energy documented safety analyses, probabilistic risk assessments, and numerous research studies.

RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024

  1. nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE Consequence analysis: A fundamental tenet of safety regulation
  • An important part of good regulation is estimating public consequence measures and using this knowledge to inform regulatory decisions.
  • MACCS allows the NRC to estimate public consequence measures and provides a powerful tool to inform development of our regulations and guidance.

RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024

  1. nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE
  • 857 MACCS Users Americas 556 Asia 176 Europe 120 Africa 5
  • 24 Cooperative Severe Accident Research Program (CSARP) Member Countries
  • 149 Organizations Regulators, Researchers, Universities, and the Commercial Nuclear Industry MACCS Users Community

RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024

  1. nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE MACCS/WinMACCS MACCS is the main executable of the computer code.

The NRC released MACCS version 4.2 in March 2023.

WinMACCS serves as the current user interface for MACCS. The NRC released WinMACCS version 4.2 in March 2023.

The user interface is undergoing a modernization effort, which is expected to be completed by Summer 2024.

MACCS-HYbrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT)

Provides capability to perform high-fidelity Lagrangian atmospheric transport modeling. The NRC released MACCS-HYSPLIT version 1.2 in March 2023.

SecPop Generates site data from Census information. The NRC released SecPoP version 4.3.1 in July 2020.

SecPoP is being updated to include the 2020 US census data and code improvement upgrades (expected by Fall 2024).

MelMACCS Provides source term parameters to MACCS. The NRC released MelMACCS version 4.0 in September 2022.

MelMACCS is undergoing code improvement upgrades (expected by Winter 2024).

AniMACCS Provides animation of plume segments of MACCS. The NRC released MelMACCS version 1.3.1 in January 2022.

MACCS Code Development Activities

RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024

  1. nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE
  • The MACCS-UI is undergoing a modernization effort with the key goal of ensuring long-term usability.
  • The MACCS-UI is anticipated to offer a user interface and functionalities akin to WinMACCS.
  • The MACCS-UI modernization is expected to be completed by Summer 2024.

Modernizing the MACCS User Interface (MACCS-UI)

RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024

  1. nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE The MACCS development team is currently working on several advanced reactor initiatives to ensure that the MACCS code continues to meet regulatory needs for consequence analysis.

Item Phenomenological Areas 2019 2020 2021 2022 2023 2024 Reports CA1 Atmospheric Transport and Dispersion (Nearfield Modeling) x x

x SAND2021-6924 CA2 Radionuclide Release Screening x

x SAND2022-12018 CA3 Radionuclide Release Screening (Atmospheric Transport and Dispersion & Dosimetry) x SAND2022-12766 CA4 Dosimetry and Health Effects (Tritium Modeling) x x

x SAND2022-12016 CA5 Radionuclide Evolution in Atmosphere x

x In progress MACCS Advanced Reactor Initiatives

RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024

  1. nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE Relevant Environmental Transformation Processes
  • Chemical Reactions
  • Oxidation
  • Agglomeration
  • Hygroscopicity Current MACCS Capabilities
  • Radionuclide Decay and Ingrowth
  • Dry Deposition
  • Wet Deposition Other Atmospheric Transport and Dispersion Models
  • HYSPLIT
  • CMAQ
  • WRF-CHEM
  • SORAMI
  • RASCAL
  • RATCHET MACCS Advanced Reactor Initiatives Radionuclide Evolution in the Atmosphere (Task CA5)

RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024

  1. nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE
  • Future Focused Research Activities
  • The NRC is researching using National Centers for Environmental Prediction data to support severe accident consequence analysis at locations without onsite meteorological data.
  • The NRC is planning to initiate research on how MACCS can use census data and other data sources to enable the reporting of community vulnerability indices for populations around a site. The NRC also plans to re-evaluate how MACCS models recovery decisions in low-income areas.
  • Radionuclides Accident Consequence Analyses for Space Launch
  • The United States is developing space nuclear systems where such systems safely enable or enhance space exploration or operational capabilities [NSPM-20].

MACCS Applications Supporting Other Emerging Areas

RIC 2024 Hybrid U.S. Nuclear Regulatory Commission 36th Annual Regulatory Information Conference MARCH 12-14, 2024

  1. nrcric2024 www.nrc.gov ADAPTING TO A CHANGING LANDSCAPE Connect With Us PM MACCS Code Development & Applications Salman Haq, salman.haq@nrc.gov Nazila Tehrani, nazila.tehrani@nrc.gov Code Distribution (MACCSCodes@nrc.gov)

AJ Nosek, aj.nosek@nrc.gov Branch Chief Luis Betancourt, luis.Betancourt@nrc.gov Visit us at: https://maccs.sandia.gov/maccs.aspx

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