Preparation and Radiation Shielding Mechanism of Lead-Boron-Polyethylene Composites

doi:10.19894/j.issn.1000-0518.240045

Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (8): 1168-1174.DOI: 10.19894/j.issn.1000-0518.240045

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Preparation and Radiation Shielding Mechanism of Lead-Boron-Polyethylene Composites

Kun ZHANG¹(), Bo ZHU², Chang-Bin DU², Yi HAN³

^1.Zhonghe 404 Co. ，Ltd. Post Processing and Operation Company，Jiuquan 735300，China
^2.Zhonghe 404 Co. ，Ltd. First Branch，Jiayuguan 732500，China
^3.China Institute for Radiation Protection，Taiyuan 030006，China

Received:2024-02-05 Accepted:2024-05-22 Published:2024-08-01 Online:2024-08-27
Contact: Kun ZHANG
About author:zkqwwe@163.com
Supported by:
Shanxi Province Applied Basic Research Program(20210302124178)

Abstract

Abstract:

In order to effectively protect personnel and equipment from radiation hazards and expand the application range of materials， the preparation and radiation shielding mechanism of lead boron polyethylene composite materials are studied. Preprocess and modify boron containing compounds， mix them with lead sand and polyethylene to prepare lead boron polyethylene composite materials. Select Cs radiation source and use Monte Carlo neutron photon transport program as the simulation program to verify the shielding mechanism. Construct a composite material model and Cs radiation source model， calculate the neutron shielding coefficient， consider the density and thickness of the composite material， and simulate the shielding performance of radiated X-rays under different radiation energies. The experimental results show that when the neutron coefficient decreases， increasing the density of the prepared composite material leads to an increase in the shielding thermal neutron coefficient； When the density of the composite material is 5.9 g/cm³ and the thickness is 4.5 cm， it can meet the requirements of radiation shielding mechanism.

Key words: Lead boron polyethylene, Radiation shielding mechanism, Boron containing compounds, Shielding penetration ratio, Injection penetration rate

CLC Number:

O633.1

Kun ZHANG, Bo ZHU, Chang-Bin DU, Yi HAN. Preparation and Radiation Shielding Mechanism of Lead-Boron-Polyethylene Composites[J]. Chinese Journal of Applied Chemistry, 2024, 41(8): 1168-1174.

Figures/Tables 7

Fig.1 Distinguishing range of radiation energy

Table 1 Effects of different densities on radiation shielding mechanisms

Density change /（g·cm^-3）	Fast neutron shielding factor	Thermal neutron shielding factor
5.9	3.52	15.35
6.0	3.34	16.86
6.1	3.28	17.01
6.2	3.16	18.52
6.3	3.04	18.98
6.4	2.82	19.62
6.5	2.77	20.01

Fig.2 The influence of density on γ radiation shielding coefficient

Fig.3 Shield penetration ratio

Fig.4 X-ray mass attenuation coefficient

Table 2 The influence of temperature on the stability of lead boron polyethylene composite materials

Temperature/℃	-40	0	25	50	75	100	125	150
Stability index	85	90	95	98	96	94	90	80

Fig.5 Characterization of lead boron polyethylene composite materials

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Preparation and Radiation Shielding Mechanism of Lead-Boron-Polyethylene Composites

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