Experimental benchmarks on kinetic parameters in accelerator-driven system with 100 MeV protons at Kyoto University Critical Assembly

Pyeon, Cheol Ho; Yamanaka, Masao; Endo, Takao; Rooijen, W.F.G. van; Chiba, Go

doi:10.1016/j.anucene.2017.03.030

Cited by 37 publications

(17 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus pulsed protons of 100 MeV are injected onto the heavy metal target of Pb-Bi and the spallation neutrons produced are directed into the subcritical system. The latter is loaded with highly enriched uranium fuel while it is moderated and reflected with polyethylene or water [16]. At KUCA, cores A and B are moderated and reflected by polyethylene while core C is light water-moderated and reflected.…”

Section: Kyoto University Critical Assembly (Kuca)mentioning

confidence: 99%

“…Precise descriptions of the fuel assemblies as wellas the atom densities of the materials that compose the core elements, i.e. the HEU fuel plate, the polyethylene reflector, the polyethylene moderator, the aluminum sheath, the spallation target and the coating materials over Pb-Bi plate, are presented in detail in[16]. Regarding the accelerator, the main characteristics of the proton beam are 1 nA intensity, 20 Hz pulsed frequency, 100 ns pulsed width and 40 mm diameter spot size at the spallation target.…”

mentioning

confidence: 99%

“…Regarding the accelerator, the main characteristics of the proton beam are 1 nA intensity, 20 Hz pulsed frequency, 100 ns pulsed width and 40 mm diameter spot size at the spallation target. A detailed description of the experiments that are conducted in the Kyoto University facility along with the relevant results can be found in[16].…”

mentioning

confidence: 99%

See 2 more Smart Citations

Qualification of the ANET Code for Spallation Neutron Yield and Core Criticality in the KUCA ADS

Xenofontos¹,

Panayiota²,

Varvayanni³

et al. 2019

WJNST

View full text Add to dashboard Cite

Innovative nuclear reactor concepts such as the Accelerator Driven Systems (ADSs) have imposed extra requirements of simulation capabilities on the existing stochastic neutronics codes. The combination of an accelerator and a nuclear reactor in the ADS requires the simulation of both subsystems for an integrated system analysis. Therefore, a need arises for more advanced simulation tools, able to cover the broad neutron energy spectrum involved in these systems. ANET (Advanced Neutronics with Evolution and Thermal hydraulic feedback) is an under development stochastic code for simulating conventional and hybrid nuclear reactors. Successive testing applications performed throughout the ANET development have been utilized to verify and validate the new code capabilities. In this context, the ANET reliability in simulating the spallation reaction and the corresponding neutron yield as well as computing the multiplication factor of an operating ADS are here examined. More specifically, three cores of the Kyoto University Critical Assembly (KUCA) facility in Japan were analyzed focusing on the spallation neutron yield and the neutron multiplication factor. The ANET-produced results are compared with independent results obtained using the stochastic codes MCNP6.1 and MCNPX. Satisfactory agreement is found between the codes, confirming thus ANET's capability to successfully estimate both the neutron yield of the spallation reaction and the k eff of a realistic ADS.

show abstract

Section: Kyoto University Critical Assembly (Kuca)mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Qualification of the ANET Code for Spallation Neutron Yield and Core Criticality in the KUCA ADS

Xenofontos¹,

Panayiota²,

Varvayanni³

et al. 2019

WJNST

View full text Add to dashboard Cite

show abstract

“…In practice, however, the PNS measurement may yield considerably different results at different detector positions and neutron sources, as reported in the experimental benchmarks on an ADS at Kyoto University Critical Assembly (KUCA) [15,16]. This measurement dependency on the detector position and the neutron source can be attributed mostly to the signal contamination [11,16] by the highermode components of the prompt neutron flux, which is caused by taking detector signals before the higher-mode components fully decay out. It is difficult, however, to obtain confident detector signals after the prompt neutron flux converges to the fundamental mode in a deep subcritical system where the prompt neutron flux decreases rapidly.…”

Section: Introductionmentioning

confidence: 99%

“…The position-dependent convergence is diagnosed by a slope fitting to the detector signals obtained from the TDMC calculations. The proposed methods are implemented in a Seoul National University continuous-energy Monte Carlo (MC) code, McCARD [21], and applied to the Pb-Bi-zoned ADS experimental benchmark at KUCA [22].…”

Section: Introductionmentioning

confidence: 99%

Determination of an Effective Detector Position for Pulsed-Neutron-Source Alpha Measurement by Time-Dependent Monte Carlo Neutron Transport Simulations

Jang

Shim

2018

Science and Technology of Nuclear Installations

View full text Add to dashboard Cite

A simple method using the time-dependent Monte Carlo (TDMC) neutron transport calculation is presented to determine an effective detector position for the prompt neutron decay constant (α) measurement through the pulsed-neutron-source (PNS) experiment. In the proposed method, the optimum detector position is searched by comparing amplitudes of detector signals at different positions when their α estimates by the slope fitting are converged. The developed method is applied to the Pb-Bi-zoned ADS experimental benchmark at Kyoto University Critical Assembly. The α convergence time estimated by the TDMC PNS simulation agrees well with the experimental results. The α convergence time map and the corresponding signal amplitude map predicted by the developed method show that polyethylene moderator regions adjacent to fuel region are better positions than other candidates for the PNS α measurement.

show abstract

Introduction

Pyeon

2021

Accelerator-Driven System at Kyoto University Critical Assembly

Self Cite

View full text Add to dashboard Cite

At the Kyoto University Critical Assembly (KUCA), the accelerator-driven 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.

show abstract

Experimental benchmarks on kinetic parameters in accelerator-driven system with 100 MeV protons at Kyoto University Critical Assembly

Cited by 37 publications

References 21 publications

Qualification of the ANET Code for Spallation Neutron Yield and Core Criticality in the KUCA ADS

Qualification of the ANET Code for Spallation Neutron Yield and Core Criticality in the KUCA ADS

Determination of an Effective Detector Position for Pulsed-Neutron-Source Alpha Measurement by Time-Dependent Monte Carlo Neutron Transport Simulations

Introduction

Contact Info

Product

Resources

About