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NEUTRON GENERATOR FACILITY AT SFU: GEANT4 DOSE RATE PREDICTION AND VERIFICATION.

J Williams1, A Chester1, T Domingo1

  • 1Department of Chemistry, Simon Fraser University, Burnaby, BC, Canada V5A 1S6.

Radiation Protection Dosimetry
|September 24, 2015
PubMed
Summary
This summary is machine-generated.

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Researchers created detailed neutron dose rate maps using GEANT4 simulations for a neutron generator facility. The simulation results closely matched radiation survey measurements, validating the model for facility safety.

Area of Science:

  • Nuclear physics
  • Radiation detection and measurement
  • Computational physics

Background:

  • Neutron generator facilities require accurate radiation monitoring for safety.
  • Monte Carlo simulations are valuable tools for predicting radiation fields.
  • Validating simulation models with experimental data is crucial for reliable predictions.

Purpose of the Study:

  • To generate detailed neutron dose rate maps for a neutron generator facility.
  • To validate the accuracy of the GEANT4 Monte Carlo framework for neutron dose rate predictions.
  • To compare simulated dose rates with experimental measurements.

Main Methods:

  • Utilized the GEANT4 Monte Carlo framework to simulate neutron transport and generate dose rate maps.
  • Conducted radiation surveys during facility commissioning to obtain experimental dose rate measurements.

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  • Compared simulated dose rates with measured values across various locations within the facility.

    • Main Results:

    • GEANT4 simulations produced detailed neutron dose rate maps for the facility.
    • Simulated neutron dose rates agreed with experimental measurements within a factor of 2 in most areas.
    • Predictions showed agreement within 10% inside the neutron generator vault when including thermal neutrons.

    Conclusions:

    • The GEANT4 Monte Carlo framework accurately predicts neutron dose rates in a generator facility.
    • The validated model can be used for radiation safety assessments and facility design.
    • Accounting for thermal neutrons improves the agreement between simulation and measurement.