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<p>Renewed interest in molten salt reactors increases the need for accurate cross section data. The <sup>35</sup>Cl’s(n,p)<sup>35</sup>S reaction has a high uncertainty, affecting reactivity predictions for TerraPower’s MCRE and similar designs. Discrete energy data has been collected, but integral cross section data is still needed. An experiment was designed at The University of Texas to measure the integral fast cross section using an in-core fast neutron facility. Additional research was done into potential samples and beta counting methods. Modeling was done to estimate the <sup>35</sup>Cl activation rates at 900&#xa0;kW across various irradiation durations.</p>

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Designing an integral Cl-35(n,p) cross section measurement

  • 期刊论文

  • 发表日期：

    2025年11月20日

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  • Kohlton D. Mathis,
  • Sarah T. Castro,
  • Khiloni A. Shah,
  • Joseph L. Lapka,
  • Derek A. Haas

摘要

Renewed interest in molten salt reactors increases the need for accurate cross section data. The 35Cl’s(n,p)35S reaction has a high uncertainty, affecting reactivity predictions for TerraPower’s MCRE and similar designs. Discrete energy data has been collected, but integral cross section data is still needed. An experiment was designed at The University of Texas to measure the integral fast cross section using an in-core fast neutron facility. Additional research was done into potential samples and beta counting methods. Modeling was done to estimate the 35Cl activation rates at 900 kW across various irradiation durations.