Resonance Interaction Effect between Hot Sample and Cold Core in Analysis of Doppler Effect Measurement.

• OKAJIMA Shigeaki

  Tokai Research Establishment, Japan Atomic Energy Research Instisute

• OIGAWA Hiroyuki

  Tokai Research Establishment, Japan Atomic Energy Research Instisute

• MUKAIYAMA Takehiko

  Tokai Research Establishment, Japan Atomic Energy Research Instisute

Abstract

The resonance interaction effect between hot sample and adjacent cold core was evaluated in a small sample ²³⁸U Doppler effect measuremnt. For this analysis a collision probability code-with an ultra-fine group structure PEACO-X was developed. The previously measuredDoppler effect reactivity confficients at FCA are systematically analyzed by using the PEACO-Xcode. The results were compared with the conventional calculation results using the SLAROM code. From these results, it was shown that this effect depens on the background cross section for ²³⁸U in a core, and also depends on the radius and density of the sample. When this resonance interaction effect is taken into account, the calculated Doppler reactivity woths becomes larger than those using the conventional method and the sample dependency of calculation disappeared. The reliability of Doppler effect calculation was significantly improved.

Journal

• Journal of Nuclear Science and Technology

  Journal of Nuclear Science and Technology 31 (10), 1097-1104, 1994

  Atomic Energy Society of Japan

Keywords

• Doppler effects
• uranium 238
• resonance interaction effects
• Doppler reactivity worth
• sample reactivity measurement
• collision probability
• self shielding effect
• reliability
• FCA reactor
• JENDL-3.1
• fast reactors

Details

• CRID: 1390001204093977600
• NII Article ID: 130000825736
• DOI: 10.3327/jnst.31.1097
• COI: 1:CAS:528:DyaK2cXntV2qurc%3D
• ISSN: 18811248
• ISSN: 00223131
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed