Development of an Optimizing Design for the Radiation Shielding with Intense Neutron Extra-background

GUO Hongsheng; GUO Qiyu; YANG Gaozhao; ZHU Xuebin; HU Qingyuan

doi:10.11804/NuclPhysRev.32.03.318

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GUO Hongsheng, GUO Qiyu, YANG Gaozhao, ZHU Xuebin, HU Qingyuan. Development of an Optimizing Design for the Radiation Shielding with Intense Neutron Extra-background[J]. Nuclear Physics Review, 2015, 32(3): 318-322. doi: 10.11804/NuclPhysRev.32.03.318

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GUO Hongsheng, GUO Qiyu, YANG Gaozhao, ZHU Xuebin, HU Qingyuan. Development of an Optimizing Design for the Radiation Shielding with Intense Neutron Extra-background[J]. Nuclear Physics Review, 2015, 32(3): 318-322. doi: 10.11804/NuclPhysRev.32.03.318

Development of an Optimizing Design for the Radiation Shielding with Intense Neutron Extra-background

doi: 10.11804/NuclPhysRev.32.03.318

Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics,Mianyang 621999, Sichuan, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2015-09-20

Abstract

The value of prompt neutron multiplication, α, is measured under the condition of using a denser plasma focus(DPF) neutron-source irradiating zero power assembly for the first time in China. The acquired signal is lower three orders of magnitudes than that of the noise caused by direct and scattered neutrons from the extra-high-intensity neutron-source. Using different kinds of material to decrease the noise caused by neutron with different kinds of energies, an optimized design for radiation shielding is developed by the method of numerical simulation to suppress noise signal. Both neutron and γ-ray are shielded simultaneously. The Signal/Noise Ratio (SNR) with the optimal design was up to 7.5:1 and was consistent with the experimental results. The noise of neutron is decreased effectively by the new kind of unorganic crystals used.
- prompt neutron multiplication,
- un-expect neutronbackground,
- numerical simulation,
- signal/noise ratio,
- zero power assembly
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Development of an Optimizing Design for the Radiation Shielding with Intense Neutron Extra-background

doi: 10.11804/NuclPhysRev.32.03.318

Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics,Mianyang 621999, Sichuan, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2015-09-20

Key words:

Abstract: The value of prompt neutron multiplication, α, is measured under the condition of using a denser plasma focus(DPF) neutron-source irradiating zero power assembly for the first time in China. The acquired signal is lower three orders of magnitudes than that of the noise caused by direct and scattered neutrons from the extra-high-intensity neutron-source. Using different kinds of material to decrease the noise caused by neutron with different kinds of energies, an optimized design for radiation shielding is developed by the method of numerical simulation to suppress noise signal. Both neutron and γ-ray are shielded simultaneously. The Signal/Noise Ratio (SNR) with the optimal design was up to 7.5:1 and was consistent with the experimental results. The noise of neutron is decreased effectively by the new kind of unorganic crystals used.

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