IPAC2017 - Classification: 08 Applications of Accelerators, Technology Transfer and Industrial Relations / U03 Transmutation and Energy Production

Paper	Title	Page
THPAB075	Accelerator Driven Subcritical Reactors for Profitable Disposition of Surplus Weapons-Grade Plutonium and Energy Generation	3883
	M.A. Cummings, R.J. Abrams, R.P. Johnson, T.J. Roberts Muons, Inc, Illinois, USA
	We discuss the GEMSTAR reactor concept, which addresses all historical reactor failures, which includes an internal spallation neutron target and high temperature molten salt fuel with continuous purging of volatile radioactive fission products such that the reactor contains less than a critical mass and almost a million times fewer volatile radioactive fission products than conventional reactors like those at Fukushima. GEMSTAR is a reactor that without redesign will burn spent nuclear fuel, natural uranium, thorium, or surplus weapons material. It will operate without the need for a critical core, fuel enrichment, or reprocessing making it an excellent candidate for export. While conventional nuclear reactors are becoming more and more difficult to license and expensive to build, SRF technology development is on a steep learning curve and the simplicity implied by subcritical operation will lead to reductions in regulatory hurdles and construction complexity.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB075
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THPVA100	Future Plans of ADS Proton Drivers at Kyoto University Research Reactor Institute	4695
	Y. Ishi, Y. Kuriyama, Y. Mori, T. Uesugi Kyoto University, Research Reactor Institute, Osaka, Japan
	The accelerator complex using FFAG synchrotrons at Kyoto University Research Reactor Institute has been operated for the ADS experiments connecting the 100 MeV proton beam line with the research reactor facility KUCA (Kyoto University Critical Assembly) since 2009. Number of neutrons produced through the nuclear spallation process strongly depends on the beam energy of the pri- mary protons. If the beam energy is increased from 100 MeV to 400 MeV, the number of neutrons corresponding to single primary proton is increased by a factor of 20. Therefore, the energy upgrade of the accelerator facility is desired by the reactor physicists. A new 400 MeV FFAG synchrotron has been designed. The results of the feasibility study of the 400 MeV ring will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA100
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THPVA129	Spatial Distributions of natU(n, f), 238U(n, g) Reaction Rates in Spallation Neutron Fields Produced by Deuterons and 12C Ions on the Massive Uranium Target	4753
SUSPSIK120	use link to see paper's listing under its alternate paper code
	A. Zhadan, V.V. Sotnikov, V.A. Voronko NSC/KIPT, Kharkov, Ukraine S.I. Tyutyunnikov JINR, Dubna, Moscow Region, Russia P. Zhivkov INRNE, Sofia, Bulgaria
	The results of the experiments carried out within the framework of Energy and Transmutation of RAW at JINR NUCLOTRON accelerator are presented. The target assembly QUINTA consisting of 512 kg natural uranium was irradiated by deuteron and carbon beams with energies 1, 2, 4 and 8 GeV (deuterons), 24 and 48 GeV (carbon). Spatial distribution and total number of capture reaction and fission reaction rates was obtained using the activation technique. The integral number of fissions reactions in the volume of uranium target remains approximately constant within our statistical errors for 1, 2, 4 and 8 GeV deuteron beams and for 24 and 48 GeV carbon beams (per one primary particle and per 1 GeV of beam energy). For the integral number of capture reactions with deuteron beams we have seen maximum at 2 GeV. Some of the obtained experimental data was analyzed using the MCNPX transport code. For spatial distribution of reaction rates in case of 4 and 8 GeV deuteron beams we have seen a discrepancy between the experimental and calculated values in backward direction.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA129
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Paper

Title

Page

Accelerator Driven Subcritical Reactors for Profitable Disposition of Surplus Weapons-Grade Plutonium and Energy Generation

3883

M.A. Cummings, R.J. Abrams, R.P. Johnson, T.J. Roberts
Muons, Inc, Illinois, USA

We discuss the GEM*STAR reactor concept, which addresses all historical reactor failures, which includes an internal spallation neutron target and high temperature molten salt fuel with continuous purging of volatile radioactive fission products such that the reactor contains less than a critical mass and almost a million times fewer volatile radioactive fission products than conventional reactors like those at Fukushima. GEM*STAR is a reactor that without redesign will burn spent nuclear fuel, natural uranium, thorium, or surplus weapons material. It will operate without the need for a critical core, fuel enrichment, or reprocessing making it an excellent candidate for export. While conventional nuclear reactors are becoming more and more difficult to license and expensive to build, SRF technology development is on a steep learning curve and the simplicity implied by subcritical operation will lead to reductions in regulatory hurdles and construction complexity.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB075

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPVA100

Future Plans of ADS Proton Drivers at Kyoto University Research Reactor Institute

4695

Y. Ishi, Y. Kuriyama, Y. Mori, T. Uesugi
Kyoto University, Research Reactor Institute, Osaka, Japan

The accelerator complex using FFAG synchrotrons at Kyoto University Research Reactor Institute has been operated for the ADS experiments connecting the 100 MeV proton beam line with the research reactor facility KUCA (Kyoto University Critical Assembly) since 2009. Number of neutrons produced through the nuclear spallation process strongly depends on the beam energy of the pri- mary protons. If the beam energy is increased from 100 MeV to 400 MeV, the number of neutrons corresponding to single primary proton is increased by a factor of 20. Therefore, the energy upgrade of the accelerator facility is desired by the reactor physicists. A new 400 MeV FFAG synchrotron has been designed. The results of the feasibility study of the 400 MeV ring will be presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA100

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPVA129

Spatial Distributions of natU(n, f), 238U(n, g) Reaction Rates in Spallation Neutron Fields Produced by Deuterons and 12C Ions on the Massive Uranium Target

4753

SUSPSIK120

use link to see paper's listing under its alternate paper code

A. Zhadan, V.V. Sotnikov, V.A. Voronko
NSC/KIPT, Kharkov, Ukraine
S.I. Tyutyunnikov
JINR, Dubna, Moscow Region, Russia
P. Zhivkov
INRNE, Sofia, Bulgaria

The results of the experiments carried out within the framework of Energy and Transmutation of RAW at JINR NUCLOTRON accelerator are presented. The target assembly QUINTA consisting of 512 kg natural uranium was irradiated by deuteron and carbon beams with energies 1, 2, 4 and 8 GeV (deuterons), 24 and 48 GeV (carbon). Spatial distribution and total number of capture reaction and fission reaction rates was obtained using the activation technique. The integral number of fissions reactions in the volume of uranium target remains approximately constant within our statistical errors for 1, 2, 4 and 8 GeV deuteron beams and for 24 and 48 GeV carbon beams (per one primary particle and per 1 GeV of beam energy). For the integral number of capture reactions with deuteron beams we have seen maximum at 2 GeV. Some of the obtained experimental data was analyzed using the MCNPX transport code. For spatial distribution of reaction rates in case of 4 and 8 GeV deuteron beams we have seen a discrepancy between the experimental and calculated values in backward direction.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA129

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