Performance analysis of fusion nuclear-data benchmark experiments for light to heavy materials in MeV energy region with a neutron spectrum shifter

Murata, Isao; Ohta, M.; Miyamaru, Hiroyuki; Kondo, Keitaro; Yoshida, Shigeo; Iida, Toshiyuki; Ochiai, Kentaro; Konno, Chikara

doi:10.1016/j.jnucmat.2010.12.299

Cited by 2 publications

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“…As a result of the series study 2,3) , especially for DT neutron benchmark experiments, it was found that for secondary gamma-ray spectrum measurements nuclear data at around 14 MeV were dominantly benchmarked. In return, for neutron spectrum measurements those below 14 MeV were also benchmarked fairly well in addition to 14 MeV, because neutrons could rapidly be moderated in a sample material.…”

Section: Introductionmentioning

confidence: 99%

“…In benchmark analyses carried out so far 2,3) , we set only one energy boundary at 10 MeV to examine ĳlast, meaning the number of energy groups is just two (14 MeV and other than 14 MeV), because the incident particle is a mono-energetic 14 MeV neutron and we wanted to know simply if the measured neutron spectrum below 14 MeV could validate the nuclear data not only for 14 MeV but also below 14 MeV. This concept worked well for performance analysis of the benchmark with DT neutrons.…”

Section: Introductionmentioning

confidence: 99%

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Thought Experiment to Examine Benchmark Performance for Fusion Nuclear Data

et al. 2017

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Abstract. There are many benchmark experiments carried out so far with DT neutrons especially aiming at fusion reactor development. These integral experiments seemed vaguely to validate the nuclear data below 14 MeV. However, no precise studies exist now. The author's group thus started to examine how well benchmark experiments with DT neutrons can play a benchmarking role for energies below 14 MeV. Recently, as a next phase, to generalize the above discussion, the energy range was expanded to the entire region. In this study, thought experiments with finer energy bins have thus been conducted to discuss how to generally estimate performance of benchmark experiments. As a result of thought experiments with a point detector, the sensitivity for a discrepancy appearing in the benchmark analysis is "equally" due not only to contribution directly conveyed to the deterctor, but also due to indirect contribution of neutrons (named (A)) making neutrons conveying the contribution, indirect controbution of neutrons (B) making the neutrons (A) and so on. From this concept, it would become clear from a sensitivity analysis in advance how well and which energy nuclear data could be benchmarked with a benchmark experiment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%