Experimental Measurements of Neutron Attenuation in the Advanced Shield Material Ferro Boron in KAMINI Reactor

Neutron Shielding Properties of Concretes Containing Boron Carbide and Ferro – Boron

“…2, it is seen that the shielding thicknesses of the concrete + Fe -B content are very lower decreased than the concrete + B 4 C content. Nowadays, there are many shielding applications of concretes containing B 4 C (Abdullah et al, 2011;Kharita et al, 2011) but in literature, similar studies related to Fe -B (Keshavamurthy et al, 2011;Raju et al, 2011) and Fe -B added to concrete is very limited.…”

“…To slow down neutrons below 1 MeV, the iron has to be complemented with a moderating material. For absorbing the slow neutrons, a material with high absorption crosssection is needed (Keshavamurthy et al, 2011).…”

Neutron Shielding Properties of Concrete and Ferro-Boron

“…But applications of ferro-boron were made only for nuclear power reactors by Keshavamurthy et al and Raju et al [8,9]. Comparison for ferro-boron could not be made for high-energy protons, because there were no similar studies.…”

Characterization of ferroboron alloys by simultaneously quantifying Fe and B mass fractions and isotopic compositions of B by external particle induced gamma-ray emission method

“…The effectiveness of shielding of ferroboron alloys depends on the boron content. An experiment on neutron attenuation with ferroboron with different wt% of B showed that the neutron shielding is comparable to that of B 4 C. 7 High-density Fe–B-added concrete was found to be a better neutron shielding material than B 4 C added to the concrete. 3 The addition of B to Fe increases the neutron shielding property but not the photon attenuating ability.…”

“…Nuclear reactions induced by low-energy proton bombardment produce activation in air, target materials and structural materials. Reactions such as 12 C(p,g) 13 N (T 1/2 = 9.96 m), 13 C(p,n) 13 N (T 1/2 = 10 min), 14 N(p,a) 11 C (T 1/2 = 20.4 min), 15 N(p,n) 15 O (T 1/2 = 122.4 s), 16 O(p,g) 17 F (T 1/2 = 64.5 s), and 18 O(p,n) 18 F (T 1/2 = 110 min) from air and 10 B(p,a) 7 Be (T 1/2 = 53 d), 54 Fe(p,g) 55 Co (T 1/2 = 17.5 h), 56 Fe(p,g) 57 Co (T 1/2 = 271.8 d), and 57 Fe(p,n) 57 Co from targets produce positron-emitting radionuclides of different half-lives, and annihilation of these radionuclides gives the 511 keV gamma ray peak in the spectra. However, their production rate under the present irradiation conditions is negligibly small.…”