Design of a semiportable shielding for a Cf-252 neutron source using MCNP-5

Authors

Frederick Corpus Hila ⋅ PH Philippine Nuclear Research Institute, Department of Science and Technology
Julius Federico Miko Jecong ⋅ PH Philippine Nuclear Research Institute, Department of Science and Technology
Cheri Anne Manzano Dingle ⋅ PH Philippine Nuclear Research Institute, Department of Science and Technology
Girlie Eunice P Lopez ⋅ PH Philippine Nuclear Research Institute, Department of Science and Technology
Kristine Marie D Romallosa ⋅ PH Philippine Nuclear Research Institute, Department of Science and Technology
Neil Raymund D Guillermo ⋅ PH Philippine Nuclear Research Institute, Department of Science and Technology

Abstract

A 10-µg Cf-252 spontaneous fission neutron source has been procured for use as a standard source for neutron dosimetry and for replacement of a depleted Cf-252. A radiation shielding container was designed and optimized using MCNP-5 radiation transport code to increase safety and versatility of transportation of the new source. Shielding materials considered for the model were acrylic, concrete, paraffin (plain and 5% borated), polyethylene, and water. The simulation results using F4 tally show that the use of borated paraffin resulted in the highest decrease in overall radiation dose rate. Using borated paraffin as the shielding material, a 3D dose rate mesh across the container was generated by FMESH4 tally. The overall design and the dose rate results show that the container can be used for both short distance transportation and temporary source storage.

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Issue

2018: Proceedings of the 36th Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2018-PC-07

Section

Poster Session C (Mathematical Physics, Optics, and Interdisciplinary Topics)

Published

2018-05-21

How to Cite

[1]

FC Hila, JFM Jecong, CAM Dingle, GEP Lopez, KMD Romallosa, and NRD Guillermo, Design of a semiportable shielding for a Cf-252 neutron source using MCNP-5, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PC-07 (2018). URL: https://proceedings.spp-online.org/article/view/SPP-2018-PC-07.