Title: Particle size inhomogeneity effect on neutron resonance densitometry
Authors: BECKER BJÖRNHARADA HiroshiKAUWENBERGHS KIM JOSEPHAKITATANI F.KOIZUMI M.KOPECKY StefanMOENS AndreSCHILLEBEECKX PeterSIBBENS GoedeleTSUCHIYA H.
Citation: ESARDA Bulletin p. 2-8
Publisher: ESARDA and the Joint Research Centre of the European Commission
Publication Year: 2013
JRC N°: JRC84087
ISSN: ISSN 0392-3029
URI: https://esarda.jrc.ec.europa.eu/images/Bulletin/Files/B_2013_50.pdf
http://publications.jrc.ec.europa.eu/repository/handle/JRC84087
Type: Articles in periodicals and books
Abstract: Neutron Resonance Densitometry (NRD) represents a possible option to determine the heavy metal content in melted nuclear fuel. This method is based on the well-established methodology of neutron time-of-flight (TOF) transmission and capture measurements. In particular, NRD can measure both the isotopic and the elemental composition. It is a non-destructive method and is applicable for highly radioactive material. The details of this method are explained in another contribution to this bulletin. The accuracy of NRD depends among other factors on sample characteristics. Inhomogeneities such as density variations in powder samples can introduce a significant bias in the determination of the composition. In this contribution, the impact of the particle size distribution of such powder samples on results obtained with NRD is investigated. Various analytical models, describing the neutron transport through powder, are compared. Stochastic numerical simulations are used to select a specific model and to estimate the introduced model uncertainty. The results from these simulations will be verified by dedicated measurements at the TOF-facility GELINA of the EC-JRC-IRMM.
JRC Directorate:Health, Consumers and Reference Materials

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