MCNPX simulations of the response of the extended-range rem meter WENDI-2

Nuclear Technology and Radiation Protection. 2014;29(suppl.):25-30 DOI 10.2298/NTRP140SS25S

 

Journal Homepage

Journal Title: Nuclear Technology and Radiation Protection

ISSN: 1451-3994 (Print); 1452-8185 (Online)

Publisher: VINCA Institute of Nuclear Sciences

LCC Subject Category: Science: Physics: Nuclear and particle physics. Atomic energy. Radioactivity

Country of publisher: Serbia

Language of fulltext: English

Full-text formats available: PDF

 

AUTHORS

de Smet Valerie (IRISIB, Brussels, Belgium)
Gerardy Isabelle (IRISIB, Brussels, Belgium)
Stichelbaut Frederic (Ion Beam Applications S.A. (IBA), Louvain-la-Neuve, Belgium)
Tolo Silvia (Montecuccolino Laboratory of Nuclear Engineering, Alma Mater Studiorum, University of Bologna, Bologna, Italy)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 36 weeks

 

Abstract | Full Text

Proton therapy uses proton beams with energies typically between 50 and 230 MeV to treat cancerous tumors very efficiently, while protecting as much as possible surrounding healthy tissues from radiation damage. Protons interacting with matter inevitably induce secondary radiation from which all people inside the proton therapy center have to be protected. The ambient dose equivalent H*(10) in such a facility is mainly due to neutrons, which can have energies up to 230 MeV. Although various dose monitoring systems sensitive to high energy neutrons have already been developed, the response function of these detectors is often insufficiently characterized, and so are the calibration factors appropriate for the specific neutron spectra encountered inside a proton therapy facility. In this work, the Monte Carlo code MCNPX 2.5.0 has been used to study the response function of the extended-range rem-meter WENDI-2 from thermal energies up to 5 GeV. A good match has been obtained with equivalent simulation results found in literature. As a first step towards the characterization of the WENDI-2 response in continuous neutron fields, MCNPX simulations have also been carried out for the case-study of a bunker around an 18 MeV H-cyclotron, which involves neutron fields from thermal energies up to 18 MeV.