New concept for ADS spallation target: Gravity-driven dense granular flow target

Yang, Lei; Wenlong, Zhan

doi:10.1007/s11431-015-5894-0

Cited by 77 publications

(27 citation statements)

References 22 publications

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“…Also, a compact geometry is needed in order to fit the solenoids of MOMENT, Neutrino Factory or Muon Collider compared to current designs of large granular waterfall or jet targets [11,12]. The toxicity of Hg presents a major disadvantage for a jet inside a superconducting solenoid with the collecting pool, and in a recirculation circuit.…”

Section: Compact Granular Waterfallmentioning

confidence: 99%

Update on MOMENT Target Station Studies

Vassilopoulos¹,

Cai²

2018

Proceedings of the 19th International Workshop on Neutrinos From Accelerators NUFACT2017 — PoS(NuFact2017)

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The muon decay medium-baseline facility (MOMENT) is a high intensity neutrino beam proposed in China, aiming to measure leptonic CP-violation. The primary proton beam has 15 MW of power provided from an ADS type of linac, which poses a radiation challenge to a capture system that consists of an adiabatic superconductive solenoid from 14 T to 3 T, and a high power liquid or fluidized target located inside the main capture coil in order to maximize the pions capture and reduce their transverse momentum. Though the initial baseline is the liquid Hg-jet, a novel fluidized waterfall-like granular target is also being studied. In this paper, we present updated studies for the compact waterfall granular target concerning simulations done with discrete element method and particle physics Monte Carlo analyses. Our continuous aim is to calculate the optimal physical parameters of the waterfall in order to comply with the physics (captured meson and muon yields) requirements of MOMENT and to remove the heat efficiently.

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Section: Compact Granular Waterfallmentioning

confidence: 99%

Update on MOMENT Target Station Studies

Vassilopoulos¹,

Cai²

2018

Proceedings of the 19th International Workshop on Neutrinos From Accelerators NUFACT2017 — PoS(NuFact2017)

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“…Coolant: Similar to the dense granular target, the coolant could be a gas‐solid 2‐phase flow coolant, which consists of a solid (granule) phase and a gas phase. It can exhibit both properties of solids and fluids.…”

Section: Concept Of An Accelerator‐driven Ceramic Fast Reactormentioning

confidence: 99%

Conceptual study of an accelerator-driven ceramic fast reactor with long-term operation

Yan

Zhang

et al. 2018

Int J Energy Res

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Summary To improve both safe operation and high resource utilization in nuclear power, we propose and investigate the concept of an accelerator‐driven ceramic fast reactor (ADCFR). This reactor type has the potential to operate continuously throughout a 40‐year core life, without fuel shuffling or supplementation. The ADCFR consists of a high‐power superconducting linear accelerator, a gravity‐driven dense granular spallation‐target, and a ceramic fast reactor. The performance of the ADCFR was assessed by using a neutron‐physics simulation, thermal calculations, and a characteristic analysis. The results show that the peak position for the neutron spectrum in the ADCFR is at about 0.1 MeV. This means that it falls with the fast neutron spectrum, and it can convert loaded nuclear fertile material into fissile fuel. Using a burnup simulation, the ideal effective multiplication‐factor (Keff) was calculated by using a combination of subcritical (accelerator‐driven) and critical modes. In 40 year of operation, Keff is obtained from the initial 0.98 to the peak ~1.02 and then to ~0.99. Different granular coolant materials were selected to compare neutron performance. In breeding, the differences are relatively small. The thermal calculation indicates that heat transfer performance of granular makes it possible to meet the required specifications in theory. Finally, the corresponding characteristics, with regard to the 2‐phase coolant, ceramic materials, nuclear safety performance, operation modes, economics, and range of applications were analyzed. Accelerator‐driven ceramic fast reactors can achieve very high levels of inherent safety, good breeding performance, high power‐generation efficiency, and high flexibility in wide range of applications.

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“…For CIADS, a gravitydriven granular flow tungsten target is being considered [6]. Tungsten was chosen due to its hardness, high heat capacity and melting point; however the neutron loss is particularly high in case of W targets.…”

Section: Vacuum Sleevementioning

confidence: 99%

“…If the target is surrounded by a vacuum sleeve, it will increase the probability for the bounced-back neutrons to avoid the target, reducing the neutron loss: for example, in the case of W target, n/p can be increased by around 30% using a 20-cm vacuum sleeve [4]. Another possibility is to use different materials, like bismuth or lead (ex: liquid Pb target), however in this case there are serious problems related to heat removal and corrosion of the target [6].…”

Section: Vacuum Sleevementioning

confidence: 99%

Neutrino Physics with Accelerator Driven Subcritical Reactors

Ciuffoli¹

2017

J. Phys.: Conf. Ser.

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Abstract. Accelerator Driven Subcritical System (ADS) reactors are being developed around the world, to produce energy and, at the same time, to provide an efficient way to dispose of and to recycle nuclear waste. Used nuclear fuel, by itself, cannot sustain a chain reaction; however in ADS reactors the additional neutrons which are required will be supplied by a high-intensity accelerator. This accelerator will produce, as a by-product, a large quantity ofν µ via muon Decay At Rest (µDAR). Using liquid scintillators, it will be possible to to measure the CPviolating phase δ CP and to look for experimental signs of the presence of sterile neutrinos in the appearance channel, testing the LSND and MiniBooNE anomalies. Even in the first stage of the project, when the beam energy will be lower, it will be possible to produceν e via Isotope Decay At Rest (IsoDAR), which can be used to provide competitive bounds on sterile neutrinos in the disappearance channel. I will consider several experimental setups in which the antineutrinos are created using accelerators that will be constructed as part of the China-ADS program.

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New concept for ADS spallation target: Gravity-driven dense granular flow target

Cited by 77 publications

References 22 publications

Update on MOMENT Target Station Studies

Update on MOMENT Target Station Studies

Conceptual study of an accelerator-driven ceramic fast reactor with long-term operation

Neutrino Physics with Accelerator Driven Subcritical Reactors

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