1. a Environmental Research Center, Kansai Electric Power Co. , 11-20 Nakoji-3chome, Amagasaki, Hyogo, 661, Japan
2. b General Office of Nuclear and Fossil Power Production, Kansai Electric Power Co. , Osaka, 530, Japan
3. c Hiroshima Research and Development Center, Mitsubishi Heavy Industry, Ltd. , Hirosima, 733, Japan
4. d Merchandise Development Group Oil Division , Kansai Tech. Co. , Osaka, 552, Japan
5. e Department of Chemical and Biochemical Engineering , Toyama University , Toyama, 930, Japan