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Methods to study power density distribution in the IVG.1M research reactor after conversion.

R R Sabitova1, I V Prozorova2, R A Irkimbekov2

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Summary

This study validates activation gamma-spectrometry for measuring power density in Kazakhstan

Keywords:
Fuel assemblyFuel elementGamma-spectrometryPower density distributionSimulation

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Area of Science:

  • Nuclear Engineering
  • Reactor Physics
  • Applied Nuclear Physics

Background:

  • The IVG.1M research reactor in Kazakhstan is converting to low-enriched fuel as part of global non-proliferation efforts.
  • Fuel composition changes necessitate accurate assessment of power density distribution for safe and efficient reactor operation.

Purpose of the Study:

  • To validate the activation gamma-spectrometry method for determining power density distribution in the IVG.1M reactor's fuel after conversion.
  • To provide a preliminary assessment of experimental results using MCNP6 calculations for power distribution and peaking factors.

Main Methods:

  • Activation gamma-spectrometry for in-situ power density measurement.
  • MCNP6 Monte Carlo simulations for preliminary power distribution and peaking factor analysis.

Main Results:

  • Successful approbation of the activation gamma-spectrometry method for post-conversion fuel.
  • MCNP6 calculations provided initial data on power distribution and peaking factors, aiding experimental assessment.

Conclusions:

  • Activation gamma-spectrometry is a viable method for assessing power density in converted research reactors.
  • Accurate power density mapping is crucial for optimizing reactor performance, fuel utilization, and safety post-conversion.