TY - JOUR
T1 - Nondestructive Quantitative Analysis of Difficult-to-Measure Radionuclides 107Pd and 99Tc
AU - Toh, Yosuke
AU - Segawa, Mariko
AU - Maeda, Makoto
AU - Tsuneyama, Masayuki
AU - Kimura, Atsushi
AU - Nakamura, Shoji
AU - Endo, Shunsuke
AU - Ebihara, Mitsuru
N1 - Funding Information:
The authors would like to express their sincere gratitude to the crew of the J-PARC for providing the pulsed neutron beam and to Associate Professor J. Hori for preparing the experimental materials. The neutron experiments at the J-PARC MLF were performed under the user program (Proposals No. 2019P0100, 2020P0100). This work was supported in part by Grants-in-Aid for Scientific Research (JP17H01076).
Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/7/20
Y1 - 2021/7/20
N2 - Considering the expanding demand for nuclear waste management of the spent nuclear fuel materials in near future, a nondestructive analytical scheme applicable to one of the most difficult-to-measure nuclides 107Pd, which emits no decay γ-rays and whose half-life is too long to be decayed out during a human lifetime, was designed. The scheme consists of a sophisticated instrument capable of the detection of γ-rays by Ge detectors coupled with time-of-flight measurement of neutrons and a high-intensity pulsed neutron beam and can simultaneously perform time-of-flight-coupled prompt γ-ray analysis (TOF-PGA) as well as PGA and neutron resonance capture analysis (NRCA). The analytical capability for simulated samples of the Tc-platinum group metals (Tc-PGMs) obtained by the group-partitioning process of spent nuclear fuels, which contain not only 107Pd but also 99Tc and other difficult-to-measure fission products, was evaluated. It was confirmed that although PGA and NRCA can accurately analyze both nuclides in individual, single substances, only TOF-PGA can analyze 107Pd as well as 99Tc in the Tc-PGM-simulated sample. The TOF-PGA measurement technique can be widely used for the nondestructive analysis of 107Pd and 99Tc in nuclear wastes.
AB - Considering the expanding demand for nuclear waste management of the spent nuclear fuel materials in near future, a nondestructive analytical scheme applicable to one of the most difficult-to-measure nuclides 107Pd, which emits no decay γ-rays and whose half-life is too long to be decayed out during a human lifetime, was designed. The scheme consists of a sophisticated instrument capable of the detection of γ-rays by Ge detectors coupled with time-of-flight measurement of neutrons and a high-intensity pulsed neutron beam and can simultaneously perform time-of-flight-coupled prompt γ-ray analysis (TOF-PGA) as well as PGA and neutron resonance capture analysis (NRCA). The analytical capability for simulated samples of the Tc-platinum group metals (Tc-PGMs) obtained by the group-partitioning process of spent nuclear fuels, which contain not only 107Pd but also 99Tc and other difficult-to-measure fission products, was evaluated. It was confirmed that although PGA and NRCA can accurately analyze both nuclides in individual, single substances, only TOF-PGA can analyze 107Pd as well as 99Tc in the Tc-PGM-simulated sample. The TOF-PGA measurement technique can be widely used for the nondestructive analysis of 107Pd and 99Tc in nuclear wastes.
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U2 - 10.1021/acs.analchem.1c01233
DO - 10.1021/acs.analchem.1c01233
M3 - Article
AN - SCOPUS:85111116369
SN - 0003-2700
VL - 93
SP - 9771
EP - 9777
JO - Analytical Chemistry
JF - Analytical Chemistry
IS - 28
ER -