Model design of a compact delayed gamma-ray moderator system using 252Cf for safeguards verification measurements

Rodriguez, D.; Rossi, Fabiana; Takahashi, Tohn; Seya, M.; Koizumi, M.

doi:10.1016/j.apradiso.2019.01.002

Cited by 8 publications

(1 citation statement)

References 18 publications

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“…In order to offset the required low-energy filtering, a moderator must be used to reduce the neutron energy to utilize the high fission crosssection of fissile nuclides (i.e. 235 U, 239 Pu, 241 Pu) [8,9].…”

Section: Delayed Gamma-ray Spectroscopy Developmentmentioning

confidence: 99%

Utilizing nuclear data in delayed gamma-ray spectroscopy inverse Monte Carlo analysis

et al. 2020

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Safeguards verification of uranium and plutonium in high-radioactivity nuclear material is currently performed using destructive analysis techniques. However, the preparation method is a burden on both the safeguards inspectors and facility operators. While nondestructive assay (NDA) techniques would improve the efficiency and time, there are no passive NDA techniques available to directly verify the U and Pu content. As an alternative, the JAEA and JRC are collaboratively developing the Delayed Gamma-ray Spectroscopy (DGS) active-interrogation NDA technique to evaluate the fissile composition from the unique fission product yield distributions. To analyze the data we are developing an Inverse Monte Carlo (IMC) method that simulates the interrogation and evaluates the individual contributions from the mixed nuclear material to the composite spectrum. While the current nuclear data affects the ability to evaluate the composition, the IMC analysis method can be used to determine the systematic uncertainty contributions and has the potential to improve the nuclear data. We will present the current status of the DGS collaborative work as it relates to the development of the DGS IMC analysis.

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Section: Delayed Gamma-ray Spectroscopy Developmentmentioning

confidence: 99%