[1B07-11] Residual Water Analysis

[1B11] α-emitting nuclides analysis of the stagnant water including sediments in Fukushima Daiichi NPS

(11) Dissolution of fine particles and α-emitting nuclides by immersing in an acid solution

Takukmi Yomogida¹, Shiori Morii¹, Toshitaka Oka¹, Yoshikazu Koma¹, *Yoshihiro Kitatsuji¹ (1. JAEA)

Keywords:sediment water, analysis, particle

Most of α-emitting nuclides in sediment of stagnant water exist as iron particles and U particles. An attempt was made to selectively dissolve iron particles by immersion in an acid solution and investigate the abundance of α-nuclides in these particles. Most of the uranium in the sediment is present on iron particles like other alpha nuclides, and the proportion of uranium present as U particles is estimated to be 5% or less.