Optimization of the epithermal neutronic beam for BNCT at a 22 MW MTR reactor.
The design of an Epithermal Neutronic Beam (ENB) at a 22 MW MTR reactor for the Boron Neutron Capture Therapy (BNCT) is discussed in this paper(Calculations were made for the ETRR-2 reactor). Along the beam a moderator made from the materials: Pb + Al + Cd + Al + FLUENTAL + Al + FLUENTAl + Air + Cd + Bi with Pb was used as reflector. Following the moderator is air + Pb + Air with Bi lined collimator and Li2CO3-Polyethelene at the beam exit. The collimator is surrounded by layers of water, heavy concrete and Pb. The calculated values of the beam at the head phantom were: Фepith = 2.402 х 109 n/cm2.s, Df/Фepith = 1.724 х 10-11 cGy cm2/n and Dγ/Фepith = 0.196 х 10-11 cGy cm2/n, where the head phantom was placed at 5 cm from the beam exit. The obtained values by using the MCNP code of the Advantage Depth (AD), the Advantage Ratio (AR), the Advantage Depth Dose Ratio (ADDR), the treatment time and the therapeutic ratio were: 8.75 cm, 5.62, 36.37 cGy/min, 34.37 and 5.62, respectively. The MCNP geometry plotting resources were used to plot all geometrical cross sections of the simulated reactor.
['Shaaban|Ismail|I|', 'Albarhoum|Mohamad|M|']
D016754:Boron Neutron Capture Therapy D019047:Phantoms, Imaging D011878:Radiotherapy
Epithermal neutronic beam MCNPcode MTR-Reactor