TY - JOUR
T1 - Leaching test of gamma-emitting Cs, Ru, Zr, and U from neutron-irradiated UO 2/ZrO 2 solid solutions in non-filtered surface seawater
AU - Sasaki, Takayuki
AU - Takeno, Yuu
AU - Kirishima, Akira
AU - Sato, Nobuaki
N1 - Funding Information:
This work was partly supported by JSPS Grant-in-Aid for Scientific Research (S) [grant number 24226021].
PY - 2015/2/1
Y1 - 2015/2/1
N2 - The leaching behaviors of gamma-ray radionuclides, Cs-137, Ru-103, and Zr-95, produced by neutron irradiation of UO2/ZrO2 solid solutions, in real surface seawater were investigated under atmospheric conditions. The fraction of radionuclide inventory leached in the seawater was in the order of Cs > Ru (∼U) 蠑 Zr, indicating that the fraction was significantly affected by the chemical state of the radionuclides. However, the amount of soluble nuclides was proportional to that of uranium regardless of whether the solid solutions were prepared under an oxidative or reductive environment. A tiny fraction of Ru was filtered out by a 3 kDa nominal molecular weight cut-off filter after the 160 d leaching test, suggesting a different behavior from its ionic form, but Cs and U did not form a colloid-like species in seawater.
AB - The leaching behaviors of gamma-ray radionuclides, Cs-137, Ru-103, and Zr-95, produced by neutron irradiation of UO2/ZrO2 solid solutions, in real surface seawater were investigated under atmospheric conditions. The fraction of radionuclide inventory leached in the seawater was in the order of Cs > Ru (∼U) 蠑 Zr, indicating that the fraction was significantly affected by the chemical state of the radionuclides. However, the amount of soluble nuclides was proportional to that of uranium regardless of whether the solid solutions were prepared under an oxidative or reductive environment. A tiny fraction of Ru was filtered out by a 3 kDa nominal molecular weight cut-off filter after the 160 d leaching test, suggesting a different behavior from its ionic form, but Cs and U did not form a colloid-like species in seawater.
KW - Fukushima Dai-ichi NPS
KW - fission products
KW - fuel-debris
KW - leaching
KW - seawater
KW - thermodynamics
UR - http://www.scopus.com/inward/record.url?scp=84920827842&partnerID=8YFLogxK
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U2 - 10.1080/00223131.2014.935511
DO - 10.1080/00223131.2014.935511
M3 - Article
AN - SCOPUS:84920827842
VL - 52
SP - 147
EP - 151
JO - Journal of Nuclear Science and Technology
JF - Journal of Nuclear Science and Technology
SN - 0022-3131
IS - 2
ER -