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-rayOkagawa, Seigo; Nagai, Hitoshi*; Abe, Hitoshi*; Tashiro, Shinsuke
JAERI-Tech 2003-068, 17 Pages, 2003/08
JAERI-Tech-2003-068.pdf:0.78MB
To study the release mechanism of iodine from the dissolver solution in the nuclear fuel reprocessing plants to the atmosphere at criticality accidents, the characteristics of redox of iodine species in various solutions must be examined. In the present work, the effect of -ray irradiation on the redox reaction was examined in the nitric acid solution of 1M and 3M. Without irradiation, most of iodine in 1M nitric acid solutions were exist in the form of I
. In 3M nitric acid solutions, iodine was oxidized to I
. When the solutions were irradiated by -ray with exposure of more than 4C/kg, I was disappeared regardless of nitric acid concentration. At exposure of 120C/kg, iodine was oxidized to IO. At exposure of 4800C/kg, iodine was exist in the form of IO in 1M nitric acid solution. On the other hand, iodine in 3M nitric acid solution was reduced to I at the same exposure. In the irradiated solution, nitrous acid was found, which would be produced from nitric acid by -ray irradiation.
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JAERI-M 85-157, 19 Pages, 1985/10
no abstracts in English
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Nihon Genshiryoku Gakkai-Shi, 21(4), p.344 - 350, 1979/00
Times Cited Count：2no abstracts in English
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Inorg.Nucl.Chem.Lett., 14(10), p.341 - 345, 1978/10
Times Cited Count：3no abstracts in English
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JAERI-M 7064, 115 Pages, 1977/05
no abstracts in English
JAERI-M 6664, 63 Pages, 1976/08
no abstracts in English
JAERI 1243, 24 Pages, 1976/03
no abstracts in English
Meier, R.; Kitagaki, Toru; Onuki, Toshihiko*
no journal, ,
During severe accident scenarios, actinides can volatilize and subsequently react with ferrous metal in different parts of the reactors. Their behavior and potential release to the environment needs to be investigated. To this end, this study investigates high temperature reactions of actinides with ferrous metals. A focused light was used as a heating device and the heated materials were analysed by SEM-EDS and XRD to acquire information about the formed phases and specific sorption phenomena on steel surface. This study provides fundamental information about the distribution and chemical properties of actinide compounds potentially formed in the damaged reactor vessel, as well as their vapor and aerosol behavior, for the planned decommissioning of the Fukushima NPPs.
