Determination of uranium and thorium in solar salts by neutron activation analysis |
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| Authors: | K Ogiwara T Oi T Ossaka M Mukaida T Honda |
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| Institution: | (1) Department of Chemistry, Sophia University, 7-1 Kioicho, Chiyodaku, 102 Tokyo, (Japan);(2) Atomic Energy Research Laboratory, Musashi Institute of Technology, 971 Ozenji, Asaoku, 215 Kawasakishi, Kanagawa, (Japan) |
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| Abstract: | Uranium and thorium contents of solar salts were measured by neutron activation analysis. In advance of neutron irradiation, U and Th were concentrated and separated from some interfering elements by neutralization in which they were precipitated with aluminium hydroxide from solutions obtained by dissolving the salts in water or dilute nitric acid solution. The uranium and thorium concentrations determined were from several hundred ppt to 10 ppb. It was strongly indicated that uranium tends to remain in the solution (brine from seawater) phase in the process of solar salt production while thorium tends to transfer to the solid (solar salt) phase. |
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