Abstract: STUDIES ON THE EXTRACTION OF AMERICIUM WITH 30％TRPO FROM SIMULATED HLLW MEDIUMWANG JIANCHEN；SONG CHONGLI；LIU BINGREN（Institute of Nuclear Energy Technology，Tsinghua University，P.O.Box 1021，Beijing 102201）ABSTRACT The effects of salting agents on the extraction of Am in the HLLW mediun1 and the effectsof the nitric acid concentration，the dilution factor of simulated HLLW and temperature on theformation of the third phase are studied．The mathematical model of the distribution ration ofamericium extracted with 30％TRPO from simulated HLLW is deduced by homogeneous designexperiments.Key words HLLW Am Extraction TRPO