Concept of a fast breeder reactor to transmute MAs and LLFPs

Abstract The long-term issues of nuclear power systems are the effective use of uranium resources and the reduction of radioactive waste. Important radioactive wastes are minor actinides (MAs: 237Np, 241Am, 243Am, etc.) and long-lived fission products (LLFPs: 129I, 99Tc, 79Se, etc.). The purpose of...

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Autor principal:	Toshio Wakabayashi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a4a58d33661145969c727bb90964fda0
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spelling	oai:doaj.org-article:a4a58d33661145969c727bb90964fda02021-11-21T12:17:37ZConcept of a fast breeder reactor to transmute MAs and LLFPs10.1038/s41598-021-01986-w2045-2322https://doaj.org/article/a4a58d33661145969c727bb90964fda02021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01986-whttps://doaj.org/toc/2045-2322Abstract The long-term issues of nuclear power systems are the effective use of uranium resources and the reduction of radioactive waste. Important radioactive wastes are minor actinides (MAs: 237Np, 241Am, 243Am, etc.) and long-lived fission products (LLFPs: 129I, 99Tc, 79Se, etc.). The purpose of this study was to show a concept that can simultaneously achieve the breeding of fissile materials and the transmutation of MAs and LLFPs in one fast reactor. Transmutation was carried out by loading innovative Duplex-type MA fuel in the core region and LLFP-containing moderator in the first layer of the radial blanket. Breeding was achieved in the core and axial blanket. As a result, it was clarified that in this fast breeder reactor, a breeding ratio of approximately 1.1 was obtained, and MAs and LLFPs achieved a support ratio of 1 or more. The transmutation rate was 10.3%/y for 237Np, 14.1%/y for 241Am, 9.9%/y for 243Am, 1.6%/y for 129I, 0.75%/y for 99Tc, and 4%/y for 79Se. By simultaneously breeding fissile materials and transmuting MAs and LLFPs in one fast reactor, it will be possible to solve the long-term issues of the nuclear power reactor system, such as securing nuclear fuel resources and reducing radioactive waste.Toshio WakabayashiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Toshio Wakabayashi Concept of a fast breeder reactor to transmute MAs and LLFPs
description	Abstract The long-term issues of nuclear power systems are the effective use of uranium resources and the reduction of radioactive waste. Important radioactive wastes are minor actinides (MAs: 237Np, 241Am, 243Am, etc.) and long-lived fission products (LLFPs: 129I, 99Tc, 79Se, etc.). The purpose of this study was to show a concept that can simultaneously achieve the breeding of fissile materials and the transmutation of MAs and LLFPs in one fast reactor. Transmutation was carried out by loading innovative Duplex-type MA fuel in the core region and LLFP-containing moderator in the first layer of the radial blanket. Breeding was achieved in the core and axial blanket. As a result, it was clarified that in this fast breeder reactor, a breeding ratio of approximately 1.1 was obtained, and MAs and LLFPs achieved a support ratio of 1 or more. The transmutation rate was 10.3%/y for 237Np, 14.1%/y for 241Am, 9.9%/y for 243Am, 1.6%/y for 129I, 0.75%/y for 99Tc, and 4%/y for 79Se. By simultaneously breeding fissile materials and transmuting MAs and LLFPs in one fast reactor, it will be possible to solve the long-term issues of the nuclear power reactor system, such as securing nuclear fuel resources and reducing radioactive waste.
format	article
author	Toshio Wakabayashi
author_facet	Toshio Wakabayashi
author_sort	Toshio Wakabayashi
title	Concept of a fast breeder reactor to transmute MAs and LLFPs
title_short	Concept of a fast breeder reactor to transmute MAs and LLFPs
title_full	Concept of a fast breeder reactor to transmute MAs and LLFPs
title_fullStr	Concept of a fast breeder reactor to transmute MAs and LLFPs
title_full_unstemmed	Concept of a fast breeder reactor to transmute MAs and LLFPs
title_sort	concept of a fast breeder reactor to transmute mas and llfps
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/a4a58d33661145969c727bb90964fda0
work_keys_str_mv	AT toshiowakabayashi conceptofafastbreederreactortotransmutemasandllfps
_version_	1718419085003325440

Concept of a fast breeder reactor to transmute MAs and LLFPs

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