分类： 能源科学 >> 能源（综合） 分类： 核科学技术 >> 裂变堆工程技术 分类： 核科学技术 >> 粒子加速器 分类： 核科学技术 >> 乏燃料后处理技术 提交时间： 2024-06-30
Huan Jia
Xunchao Zhang
Yuanshuai Qin
Xiaobo Li
Yuan He
Neng Pu
Hanjie Cai
Haihua Niu
Yulu Huang
Guirong Huang
Wei Wu
Xiaochong Zhu
Xiaoqiang Wei
Jonathan C. Wong
摘要： Accelerator Driven sub-critical System (ADS) is considered to be the most important candidate for nuclear waste transmutation. We propose a Multi-Target Accelerator Driven System (MTADS) to resolve two longstanding challenges of ADS, namely heat removal and the associated target lifetime, and inhomogeneous power distribution that affects burn-up of the reactor. An 18 mA, 1 GeV proton beam is split into 12 beams by radio frequency cavities and injected to 12 compact targets inside the reactor. With beam power of 18 MW, the sub-critical reactor is driven to 1500 MW thermal power. The peaking factor of the reactor is reduced to 1.7 by optimization of targets number and position for Multi Target Accelerator Driven System. The maximum beam current density is also reduced to 18.5 μA/cm2, which prolongs the beam window lifetime to 12 months with T91 steel. Towards the next generation ADS, the concept of MTADS simplifies the sub-critical system and increases the transmutation efficiency.
提交时间： 2024-06-29
摘要： A new sub-critical reactorconcept is proposed as one accelerator splitting into multiple beams to drive the subcritical reactor in this work, which is so called Multi-Beam Accelerator Driven System (MB-ADS). The spallation target is designed as a unit similar to the fuel assembly. The high current proton beam is divided into multiple parts and injected into different targets located in the core to improve beam efficiency and flatten the spatial power distribution of the core. Based on different MB-ADSschemes, neutronics were conducted on the effects of beam splitting number, target assembly arrangements, fuel partitioning, and neutron data libraries. The results show that a reasonable multi-beam scheme can significantly improve the efficiency of the proton beam and flatten the power distribution of the reactor compared to the one target ADS scheme. Due to the improved beam efficiency, the beam density on the target window is greatly reduced.
分类： 物理学 >> 核物理学 提交时间： 2024-12-23
Wei, Mr. Xiao-Qiang
Cai, Dr. Hanjie
zhang, Mr. xunchao
Pu, Dr. Neng
Fang, Mr. Peng
Jia, Mr. Huan
He, Prof. Yuan 何源
Yang, Dr. Yongwei
Wang, Prof. Rong
Yan, Prof. Mingfei
Zhu, Mr. Xiao-Chong
Hui, Mr. Peng
Luo, Mr. Xin-Yuan
摘要： Accelerator-driven System (ADS) is widely regarded as the most effective transmutation solution of nuclear waste. The Monte Carlo transport simulation of full-energy-range particles, which are involved in both the spallation target and the sub-critical blanket, forms the foundation of ADS simulation studies. A Monte Carlo program named MATS has been developed in conjunction with the ADS research activities and development projects in China, with the aim of achieving key technology breakthroughs as well as facility construction. The development background of the program, the transport framework and functional modules developed for full-energy-range transport, the validations and the conclusions are introduced. The benchmark calculations of the OECD-ADS model show that MATS be used to perform ADS physical studies with reasonable deviations for both the spallation target and the sub-critical reactor.
分类： 物理学 >> 核物理学 提交时间： 2025-05-16
Wei, Mr. Xiao-Qiang
Cai, Dr. Hanjie
zhang, Mr. xunchao
Pu, Dr. Neng
Fang, Mr. Peng
Jia, Mr. Huan
He, Prof. Yuan 何源
Yang, Dr. Yongwei
Wang, Prof. Rong
Yan, Prof. Mingfei
Zhu, Mr. Xiao-Chong
Hui, Mr. Peng
Luo, Mr. Xin-Yuan
摘要： Accelerator-driven System (ADS) is widely regarded as the most effective transmutation solution of nuclear waste. The Monte Carlo transport simulation of full-energy-range particles, which are involved in both the spallation target and the sub-critical blanket, forms the foundation of ADS simulation studies. Based on the Monte Carlo simulation programs OpenMC and GMT, a program named MATS has been developed, which integrates reactor physics analysis and high-energy particle simulation capabilities for studying the ADS target-reactor system. The physical calculation functions of the program rely on an electromagnetic interaction module, a hadronic interaction module, a high-energy cross-section module, traditional reactor-oriented calculation functions and the nuclear data library. This equips MATS with the capability to simulate the transport processes of particles in a wide-energy range, which is essential for R&D of ADS because that there will be an underestimation of neutron fluence and heat density at the level of more than 10% when the neutrons above 20 MeV can not be transported. The benchmark calculations show that MATS can be used to perform ADS physical studies with reasonable deviations which are dominated by the spallation models. The development background of the program, the transport framework and functional modules, the details of the benchmark calculations and the further development plans are introduced.
分类： 物理学 >> 核物理学 提交时间： 2025-04-18
Wei, Mr. Xiao-Qiang
Cai, Dr. Hanjie
zhang, Mr. xunchao
Pu, Dr. Neng
Fang, Mr. Peng
Jia, Mr. Huan
He, Prof. Yuan 何源
Yang, Dr. Yongwei
Wang, Prof. Rong
Yan, Prof. Mingfei
Zhu, Mr. Xiao-Chong
Hui, Mr. Peng
Luo, Mr. Xin-Yuan
摘要： Accelerator-driven System (ADS) is widely regarded as the most effective transmutation solution of nuclear waste. The Monte Carlo transport simulation of full-energy-range particles, which are involved in both the spallation target and the sub-critical blanket, forms the foundation of ADS simulation studies. Based on the Monte Carlo simulation programs OpenMC and GMT, a program named MATS has been developed, dedicated to the simulation study of the ADS target-reactor system. The physical calculation functions of the program rely on an electromagnetic interaction module, a hadronic interaction module, a high-energy cross-section module, traditional reactor-oriented calculation functions and the nuclear data library. This equips MATS with the capability to simulate the transport processes of particles in a wide-energy range, which is essential for R\&D of ADS because that there will be an underestimation of neutron fluence and heat density at the level of more than 10\% when the neutrons above 20 MeV can not be transported. The benchmark calculations show that MATS can be used to perform ADS physical studies with reasonable deviations which are dominated by the spallation models. The development background of the program, the transport framework and functional modules, the details of the validations and the further development plans are introduced.
分类： 物理学 >> 核物理学 提交时间： 2023-07-10
Jinying, Ma
Chengye, Xu
Andong, Wu
Guodong, Jiang
Yue, Tao
Zongheng, Xue
Longbo, Shi
Tiancai Jiang
Zhenglong, Zhu
Ziqin, Yang
Zheng, Gao
Liepeng, Sun
Guirong, Huang
Feng, Qiu
Yuan, He
摘要： The accurate measurement of parameters such as the cavity-loaded quality factor (QL) and half bandwidth (f0.5) is essential for monitoring the performance of superconducting radio-frequency (SRF) cavities. However, the conventional field decay method employed to calibrate these values requires the cavity to satisfy a zeroinput condition. This can be challenging when the source impedance is mismatched and produce nonzero forward signals (Vf ) that significantly affect the measurement accuracy. To address this limitation, we developed a modified version of the field decay method based on the cavity differential equation. The proposed approach enables the precise calibration of f0.5 even under mismatch conditions. We tested the proposed approach on the SRF cavities of the Chinese Accelerator Driven System Front-End Demo Superconducting Linac and compared the results with those obtained from a network analyzer. The two sets of results were consistent, indicating the usefulness of the proposed approach.
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