title: Preliminary modeling of BNCT beam tube on IRT in Sofia.
abstract: The technical design of the research reactor IRT in Sofia is in progress. It includes an arrangement for a BNCT facility for tumor treatment. Modeling of geometry and material composition of filter/collimator for the BNCT beam tube on IRT has been carried out following the beam tube configuration of the Massachusetts Institute of Technology Reactor [Harling et al., 2002. The fission converter-based epithermal neutron irradiation facility at the Massachusetts Institute of Technology Reactor. Nucl. Sci. Eng. 140, 223-240.] and taking into account an ability to include the tube into the IRT reactor geometry. The results of neutron and gamma transport calculations performed for the model have shown that the facility will be able to supply an epithermal neutron flux of about 5 x 10(9) n cm(-2)s(-1), with low contamination from fast neutrons and gamma rays that would be among the best facilities currently available. An optimiziation study has been performed for the beam collimator, following similar studies for the TAPIRO research reactor in Italy. [Nava et al., 2005. Monte Carlo optimization of a BNCT facility for treating brain gliomas at the TAPIRO reactor. Radiat. Prot. Dosim. 116 (1-4), 475-481.].
authors.affiliation: Institute for Nuclear Research and Nuclear Energy (INRNE) of the Bulgarian Academy of Sciences, Tsarigradsko 72, Sofia, Bulgaria. belousov@inrne.bas.bg
authors.forename: S
authors.initials: S
authors.lastname: Belousov
authors.forename: K
authors.initials: K
authors.lastname: Ilieva
mesh_terms: D016754:Boron Neutron Capture Therapy / Q000295:instrumentation* / Q000706:statistics & numerical data*; D002031:Bulgaria; D005160:Facility Design and Construction; D006801:Humans; D008962:Models, Theoretical; D009010:Monte Carlo Method; D009369:Neoplasms / Q000532:radiotherapy; D009688:Nuclear Reactors / Q000706:statistics & numerical data*