Development of an Extended-Range Bonner Sphere Spectrometer for China Initiative Accelerator-Driven System

Wen, Zhengqi; Sang-Hwa, Song; Xu, Jie; Gong, Yixuan; Huang, Yaohuan; Ran, Jin-Hua; Tang, Xiaojie; Chen, Z Q; Li, Y; Luo, Peng

doi:10.1093/rpd/ncac251

Cited by 2 publications

(4 citation statements)

References 29 publications

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“…403 [18] of IAEA was used as the default spectrum to start the unfolding procedure. The unfolded neutron spectrum of the measured results from the literature work (36.3 • N, 103.54 • E, altitude of 1614 m) [2] was also compared in the figure 8. Figure 8 shows that the unfolded cosmic ray neutron spectrum agrees well with the default neutron spectrum at the low and medium energy range and is slightly higher in the high energy range.…”

Section: Measurements With Cosmic Ray Neutronsmentioning

confidence: 99%

“…The China initiative Accelerator Driven System (CiADS) aims to build the world's first megawatt-scale accelerator driven system facility to develop a safe and efficient nuclear waste disposal technology. Besides, CiADS will be used for characteristics research of superconducting proton linear accelerators, high-power spallation targets and subcritical reactors [1,2]. The high flux and broad-spectrum spallation neutrons are generated by bombarding the spallation target with high-energy protons produced by the linear accelerator, and these spallation neutrons are used to drive and maintain the chain reaction of the subcritical reactor.…”

Section: Introductionmentioning

confidence: 99%

“…The high flux and broad-spectrum spallation neutrons are generated by bombarding the spallation target with high-energy protons produced by the linear accelerator, and these spallation neutrons are used to drive and maintain the chain reaction of the subcritical reactor. The spallation neutrons can easily penetrate the reactor vessel, and may leak into the environment, resulting in certain radiation hazards [2,11]. Consequently, the measurement of neutron dose information in the radiation field is of great importance for the protection of personnel and the experimental equipment.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 8. Comparison of experimental and standard neutron spectrum of cosmic ray neutrons[18], as well as an unfolded spectrum from literature work[2].…”

mentioning

confidence: 99%

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Calibration and validation measurements of the Extended-range Bonner sphere spectrometer

Gong,

Wen,

Luo

et al. 2024

J. Inst.

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An Extended-range Bonner sphere spectrometer (EBSS) has been developed to investigate the neutron spectra of the China initiative Accelerator Driven System. This paper presents the design, calibration, and validation measurements of the EBSS system using a standard 241Am-Be neutron source and the cosmic ray neutrons. The EBSS system was simulated using the PHITS code, and the geometric structures were designed using the response functions obtained by simulations. The EBSS system comprises of seven polyethylene-only spheres and seven extended-range spheres encased in lead, copper, or tungsten shells along with a bare 3He proportional counter. To verify the accuracy of the simulated response functions, the EBSS system was calibrated with monoenergetic neutron beams of 565 keV at the China Institute of Atomic Energy in Beijing. The EBSS system was used to measure neutron count rates of the 241Am-Be neutron source and cosmic ray neutrons. Subsequently, the measured neutron count rates were converted into neutron spectra by the unfolding software. Experimental findings demonstrate the precise capability of the EBSS system to measure neutron spectra across a wide range of neutron radiation fields.

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Section: Measurements With Cosmic Ray Neutronsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Figure 8. Comparison of experimental and standard neutron spectrum of cosmic ray neutrons[18], as well as an unfolded spectrum from literature work[2].…”

mentioning

confidence: 99%

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