Modeling of boron carbide oxidation in steam

Investigation on boron carbide oxidation for nuclear reactor safety: Experiments in highly oxidising conditions

“…The coefficients of steam partial pressure and flow velocity obtained in the present study differ from the ones proposed by Steiner and Veshchunov [16,17]. The v coefficient calculated in the present study, 0.29, is very close to 1/3, the coefficient obtained using the heat-transfer correlation provided by Sieder and Tate for laminar fluid flow in short tubes.…”

“…It has been pointed out by Steiner and Veshchunov that the gas flow conditions, mainly the flow velocity field, has a strong influence on the boron carbide oxidation process [16,17]. Test section dimensions where different in both studies leading to different total flow velocities: 0.18 m/s in Steinbrück test compared to 0.95 m/s in the present study.…”

“…Steiner [17], based also on Steinbrück tests, suggested that hydrogen production rate, and consequently boron carbide oxidation rate, should have the following dependence on steam partial pressure and gas velocity:…”

Synthesis and consolidation of boron carbide: a review

“…Detailed investigations on oxidation characteristics of B 4 C at high temperatures have been carried out by Steinbruck et al 301,302 and others. 303,304 Higher oxidation stability of B 4 C with the addition of Zr, Cr and W borides have also been reported by Radev et al 305 Serious efforts on oxidation prevention of boron carbide at high temperatures and improvement of thermal properties have not been attempted. It may be worthwhile to investigate composites with silicides and RE borides.…”

Evaluation of Aluminum-Boron Carbide Neutron Absorbing Materials for Interim Storage of Used Nuclear Fuel

“…In dry air, appreciable oxidation doesn't occur until 450°C, corresponding with the start of the melt. In both wet and dry environments the oxide layer grows through a diffusive process through the oxide layer, though in wet atmospheres this oxide layer itself may react [77].…”