Heat calculation for gasification chamber of steam reformer

Okanuma, Hiroshi; Sasaki, Toshiki; Yamaguchi, Hiromi

JAEA-Research 2007-090, 46 Pages, 2008/02

JAEA-Research-2007-090.pdf:2.57MB

JAEA has many kinds of low level radioactive wastes and some of them are difficult to be decomposed by an incinerator. Steam reforming as treatment technology for low level radioactive wastes has been developed for decomposition and mineralization of the wastes in waste management department of JAEA, which contributes to appropriate disposal of the wastes. In this report, a heat calculation model for the gasification chamber of the steam reformer has been developed for estimation what samples can be treated or not, and effective and efficient improvement of operation. The following two cases have been calculated by the heat calculation model and it has been verified by comparing the results of calculation with the experimental data which were obtained in the latter half of fiscal year 2006. One calculation case is concerned with the operation of gasification chamber without sample feed. The other is concerned with the operation of gasification chamber with sample feed. The results of heat calculation without sample feed are in agreement with the experimental data relatively, but those of with sample are more different from the experimental data than those of without sample. This shows that the heat calculation model we have developed is feasible in terms of gas heating, but has problems in terms of physical and chemical changes of the sample in the gasification chamber. We need to modify the model in the part of physical and chemical changes of the sample in it.