Determination of plutonium isotopes in marine particles collected by the large volume in situ filtration and concentration system

摘要

An analytical method for the determination of Pu-239 and Pu-240 in marine particle samples by sector field high-resolution ICP-MS was developed. The method was applied for large and small particle samples (particle diameter: > 70 mu m and 1 - 70 mu m, respectively, collected with a large volume in situ filtration and concentration system at different depths in the water column off Rokkaho, Japan, where the spent nuclear fuel reprocessing plant of Japan Nuclear Fuel Ltd. has started test operation since March 2006.