open access

Vol 24, No 4 (2019)
Original research articles
Published online: 2019-07-01
Submitted: 2017-07-07
Get Citation

MC safe bunker designing for an 18MV linac with nanoparticles included primary barriers and effect of the nanoparticles on the shielding aspects

Amir Ghasemi-Jangjoo, Hosein Ghiasi
DOI: 10.1016/j.rpor.2019.05.009
·
Rep Pract Oncol Radiother 2019;24(4):363-368.

open access

Vol 24, No 4 (2019)
Original research articles
Published online: 2019-07-01
Submitted: 2017-07-07

Abstract

Aim

The aim of this study was to design a safe bunker for an 18MV linac in to configuration; primary barriers made from nanoparticle-containing concrete and pure concrete.

Background

Application of some nanoparticles in the shielding materials has been studied and it was shown that the presence of some nanoparticles improved radiation shielding properties.

Materials and methods

Some percentage of different nanoparticles were modeled by the MCNP5 code of MC in the megavoltage radiotherapy treatment room's primary barriers. Other parts of the designed room, such as secondary barriers and maze door, were modeled as ordinary pure concrete. A safe bunker was designed according to the MC derived spectra at primary and secondary barriers location using a modeled and benchmarked 18MV linac in free air. Then, the thickness of the required shielding materials for the door and also concrete for the walls and primary barriers were calculated separately.

Results

According to the results, required concrete thickness in primary and secondary barriers was reduced by around 0.8% compared to pure concrete application. Additionally, required lead and BPE decreased by 25% and 15%, respectively, due to primary barriers nanoparticles.

Conclusions

It was concluded that application of some nanoparticles in the shielding materials structures in megavoltage radiotherapy can make the shielding effective.

Abstract

Aim

The aim of this study was to design a safe bunker for an 18MV linac in to configuration; primary barriers made from nanoparticle-containing concrete and pure concrete.

Background

Application of some nanoparticles in the shielding materials has been studied and it was shown that the presence of some nanoparticles improved radiation shielding properties.

Materials and methods

Some percentage of different nanoparticles were modeled by the MCNP5 code of MC in the megavoltage radiotherapy treatment room's primary barriers. Other parts of the designed room, such as secondary barriers and maze door, were modeled as ordinary pure concrete. A safe bunker was designed according to the MC derived spectra at primary and secondary barriers location using a modeled and benchmarked 18MV linac in free air. Then, the thickness of the required shielding materials for the door and also concrete for the walls and primary barriers were calculated separately.

Results

According to the results, required concrete thickness in primary and secondary barriers was reduced by around 0.8% compared to pure concrete application. Additionally, required lead and BPE decreased by 25% and 15%, respectively, due to primary barriers nanoparticles.

Conclusions

It was concluded that application of some nanoparticles in the shielding materials structures in megavoltage radiotherapy can make the shielding effective.

Get Citation

Keywords

Shielding; Monte Carlo simulation; Nanoparticles; Radiotherapy

About this article
Title

MC safe bunker designing for an 18MV linac with nanoparticles included primary barriers and effect of the nanoparticles on the shielding aspects

Journal

Reports of Practical Oncology and Radiotherapy

Issue

Vol 24, No 4 (2019)

Pages

363-368

Published online

2019-07-01

DOI

10.1016/j.rpor.2019.05.009

Bibliographic record

Rep Pract Oncol Radiother 2019;24(4):363-368.

Keywords

Shielding
Monte Carlo simulation
Nanoparticles
Radiotherapy

Authors

Amir Ghasemi-Jangjoo
Hosein Ghiasi

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