Chapter 1
Introduction
Cheol Ho Pyeon
Abstract At the Kyoto University Critical Assembly (KUCA), the acceleratordriven system (ADS) is composed of a solid-moderated and solid-reflected core
(A-core) and a pulsed-neutron generator (14 MeV neutrons) or the fixed-filed alternating gradient (FFAG) accelerator (100 MeV protons). At KUCA, two external
neutron sources, including 14 MeV neutrons and 100 MeV protons, are separately
injected into the A-core, and employed for carrying out the ADS experiments.
With the combined use of the A-core and two external neutron sources, basic and
feasibility studies of ADS have been engaged in the examination of neutronics
of ADS, through the measurements of statics and kinetics parameters of reactor
physics, including subcritical multiplication factor, subcriticality, prompt neutron
decay constant, effective delayed neutron fraction, neutron spectrum, and reaction
rates.
Keywords KUCA · ADS · Pulsed-neutron generator · FFAG accelerator
1.1 Kyoto University Critical Assembly
1.1.1 KUCA Facility
The Kyoto University Critical Assembly (KUCA [1]; Fig. 1.1) is a multi-core type
critical assembly developed by Kyoto University, Japan, as a facility that can be
used by researchers from all the universities in Japan to carry out studies in the field
of reactor physics. KUCA was established in 1974, as one of the main facilities
of the Research Reactor Institute, Kyoto University (KURRI; currently, Institute
for Integrated Radiation and Nuclear Science: KURNS), located at Kumatori-cho,
Sennan-gun, Osaka, Japan.
KUCA is a multi-core-type critical assembly consisting of two solid-moderated
cores (A- and B-cores) and one light-water-moderated core (C-core). Then, a single
C. H. Pyeon (B)
Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka, Japan
e-mail: pyeon.cheolho.4z@kyoto-u.ac.jp
© The Author(s) 2021
C. H. Pyeon (ed.), Accelerator-Driven System at Kyoto University Critical Assembly,
https://doi.org/10.1007/978-981-16-0344-0_1
1
Introduction
Cheol Ho Pyeon
Abstract At the Kyoto University Critical Assembly (KUCA), the acceleratordriven system (ADS) is composed of a solid-moderated and solid-reflected core
(A-core) and a pulsed-neutron generator (14 MeV neutrons) or the fixed-filed alternating gradient (FFAG) accelerator (100 MeV protons). At KUCA, two external
neutron sources, including 14 MeV neutrons and 100 MeV protons, are separately
injected into the A-core, and employed for carrying out the ADS experiments.
With the combined use of the A-core and two external neutron sources, basic and
feasibility studies of ADS have been engaged in the examination of neutronics
of ADS, through the measurements of statics and kinetics parameters of reactor
physics, including subcritical multiplication factor, subcriticality, prompt neutron
decay constant, effective delayed neutron fraction, neutron spectrum, and reaction
rates.
Keywords KUCA · ADS · Pulsed-neutron generator · FFAG accelerator
1.1 Kyoto University Critical Assembly
1.1.1 KUCA Facility
The Kyoto University Critical Assembly (KUCA [1]; Fig. 1.1) is a multi-core type
critical assembly developed by Kyoto University, Japan, as a facility that can be
used by researchers from all the universities in Japan to carry out studies in the field
of reactor physics. KUCA was established in 1974, as one of the main facilities
of the Research Reactor Institute, Kyoto University (KURRI; currently, Institute
for Integrated Radiation and Nuclear Science: KURNS), located at Kumatori-cho,
Sennan-gun, Osaka, Japan.
KUCA is a multi-core-type critical assembly consisting of two solid-moderated
cores (A- and B-cores) and one light-water-moderated core (C-core). Then, a single
C. H. Pyeon (B)
Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka, Japan
e-mail: pyeon.cheolho.4z@kyoto-u.ac.jp
© The Author(s) 2021
C. H. Pyeon (ed.), Accelerator-Driven System at Kyoto University Critical Assembly,
https://doi.org/10.1007/978-981-16-0344-0_1
1