International Journal of Radiation Research
نشریه پرتو پژوه
Int J Radiat Res
Basic Sciences
http://ijrr.com
79
journal79
2322-3243
2345-4229
10.61186/ijrr
en
jalali
1395
7
1
gregorian
2016
10
1
14
4
online
1
fulltext
en
Design and fabrication of high density borated polyethylene nanocomposites as a neutron shield
Radiation Biology
Radiation Biology
گزارش کوتاه
Short Report
<p></p>
<p>Background: Polyethylene composites including boron can be used as an effective neutron shield. Our investigation focuses on manufacturing borated polyethylene nano-composite. The purpose of this study is to design a radiation shield for use in both neutron and gamma fields. Materials and Methods: Borated polyethylene shields containing 2%, and 5% weight percentage of Boron nano-particles were constructed and their neutron attenuation was compared with pure polyethylene. Polycarbonate films were used to find the attenuation of Am-Be neutrons after passing the shields. Mechanical properties of the shields were finally compared. Results: Mean (± SD) number of α tracks induced by neutrons passing through the shields, were found to be 1.0488×10<sup>3</sup>±128.98, <span dir="rtl"> 1.1972×10</span><span dir="rtl"><sup>3</sup></span><span dir="rtl">±289.56</span>and 1.5340×10<sup>3</sup>±206.52 for polyethylene with 5% by weight, polyethylene with 2% by weight boron nano-particles, and pure polyethylene, respectively. The neutron spectrum after each shield was also obtained by MCNP4C Monte Carlo simulations. On the other hand, borated polyethylene nano-composites showed higher tensile strength compared to that of pure polyethylene. Attenuation of neutrons measured in experiments and the result of MCNP simulation were in good agreement. Conclusion: A statistically significant difference was found between neutron attenuation by borated polyethylene nanocomposite made of 5% by weight boron and pure polyethylene. However, the difference between borated polyethylene nano-composite with 5% weight and 2% wt boron was not statistically significant.</p>
Keywords: Nano-composites, neutron shield, borated polyethylene, MCNP.
379
383
http://ijrr.com/browse.php?a_code=A-10-1-643&slc_lang=en&sid=1
S.M.J.
Mortazavi
7900319475328460010032
7900319475328460010032
No
Department of Medical Physics and Medical Engineering, and The Center for Research in Radiation Sciences (CRRS), Shiraz University of Medical Sciences, Shiraz, Iran
M.
Kardan
7900319475328460010033
7900319475328460010033
No
Nuclear Science and Technology Research Institute, Tehran, Iran
S.
Sina
7900319475328460010034
7900319475328460010034
No
Department of Nuclear Engineering, School of Mechanical Engineering, Shiraz University, Shiraz, Iran
H.
Baharvand
7900319475328460010035
7900319475328460010035
No
Department of Polymer Chemistry, Iran Polymer Institute, Tehran, Iran
N.
Sharafi
nasrinsharafi@ymail.com
7900319475328460010036
7900319475328460010036
Yes
Department of Radiology, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran