Design and manufacture of composite flexible shield for neutron-gamma mixed fields

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HASHEMI SEYED REZA; tajik mojtaba; Asadi Amirabadi Eskandar

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Journal: Journal of Radiation Safety and Measurement Year:2019 | Volume:7 | Issue:2 Page(s): 25-34

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Information Journal Paper

Title

Design and manufacture of composite flexible shield for neutron-gamma mixed fields

Author(s)

HASHEMI SEYED REZA | tajik mojtaba | Asadi Amirabadi Eskandar | Issue Writer Certificate

Keywords

Composite Flexible ShieldQ1

NutronQ2

GammaQ1

BF3 Detector Q1

Abstract

In this study, a flexible composite shield with a combination of polyethylene, tungsten and boron carbide has been designed and constructed for neutron-Gamma mixed fields. For this purpose, theoretical studies were conducted using the multi-purpose MCNPX Code. According to the results of simulation studies, a multi-purpose composite was constructed using a combination of a solid phase of boron carbide particles with tungsten metal powder and a mixture of different types of soft and hard polyethylene in a laboratory at the center of polymer and petrochemical industry in Iran. The 241Am-Be neutron flux attenuation rate and the cesium Gamma flux attenuation were measured for the built shield. The results show that in the polyethylene /boron carbide / tungsten (PE / B4C / w) composite with respect to the micrometric dimensions of the reinforcing particles and the high cross-section of interactions of the radioactive beams with these particles, the composite shield with a much lower thickness than the ordinary shields has higher absorption of Gamma and neutron beams. This shield containing 30% of tungsten and boron with a thickness of approximately 0. 5 cm, absorbs 90% of the Americium-beryllium neutrons and at the thickness of 2 cm absorbs nearly 40% of the Gamma rays of the 137Cs source.

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APA: Copy

HASHEMI, SEYED REZA, tajik, mojtaba, & Asadi Amirabadi, Eskandar. (2019). Design and manufacture of composite flexible shield for neutron-gamma mixed fields. IRANIAN JOURNAL OF RADIATION SAFETY AND MEASUREMENT, 7(2 ), 25-34. SID. https://sid.ir/paper/404467/en

Vancouver: Copy

HASHEMI SEYED REZA, tajik mojtaba, Asadi Amirabadi Eskandar. Design and manufacture of composite flexible shield for neutron-gamma mixed fields. IRANIAN JOURNAL OF RADIATION SAFETY AND MEASUREMENT[Internet]. 2019;7(2 ):25-34. Available from: https://sid.ir/paper/404467/en

IEEE: Copy

SEYED REZA HASHEMI, mojtaba tajik, and Eskandar Asadi Amirabadi, “Design and manufacture of composite flexible shield for neutron-gamma mixed fields,” IRANIAN JOURNAL OF RADIATION SAFETY AND MEASUREMENT, vol. 7, no. 2 , pp. 25–34, 2019, [Online]. Available: https://sid.ir/paper/404467/en

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