A LOCA in a fusion reactor involving an ingress of steam presents a safety concern due to hydrogen generated from steam reactions with plasma facing components. Hydrogen concentrations must be maintained below explosive levels. To support safety evaluations we have experimentally determined hydrogen generation rates when a tungsten alloy is exposed to steam from 400 degrees C to 1200 degrees C. We studied effects of steam pressure between 2.8 x 10(4) and 8.5 x 10(4) Pa, i.e., (0.28-0.84 atm) and gas velocity between 0.011 and 0.063 m/s. We present relationships for the reaction rates, oxidation phases, and mechanisms associated with the hydrogen generation. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
10.1016/s0022-3115(98)00169-x
258
Times Cited: 8 B 8th International Conference on Fusion Reactor Materials (ICFRM-8) Oct 26-31, 1997 Sendai, japan Tohoku Univ, Inst Mat Res; Min Educ Sci & Culture Japan, Int Symp Supporting Program; Atom Energy Soc Japan; Iron & Steel Inst Japan; Japan Inst Met; Japan Soc Appl Phys; Japan Soc Plasma Sci & Nucl Fus Res; Japanese Welding Soc; Japanese High Temp Soc; Amer Nucl Soc; AIME & ASM, Nucl Met Comm; British Nucl Energy Soc; European Nucl Soc; Japan Convent Bur 8
1979-1984
0022-3115