微藻对乏燃料储罐放射性废液中Cs-137和Sr-90的净化研究

Tae Young Kim, H. Park, Y. Song, U. Lee
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引用次数: 0

摘要

本研究评价了微藻对放射性废物中所含放射性核素铯-137 (Cs-137)和锶-90 (Sr-90)的环保性去污的适用性。实验中使用的整体放射性溶液是用标准放射性溶液和蒸馏水稀释,浓度为1.5 Bq/mL Cs-137和1.0 Bq/mL Sr-90制成的。本实验采用两种微藻,普通小球藻对Sr-90进行去污,雨嗜血球菌对Cs-137进行去污。实验方法是将培养2周的微藻放入有半透膜的瓶中,再将装微藻的瓶放入制作好的放射性溶液中,使微藻与放射性溶液通过半透膜反应48小时。对于每个样品的放射性浓度分析,γ射线同位素Cs-137使用伽马射线核素分析仪,β射线同位素Sr-90使用液体闪烁计数(LSC)。实验结果表明,两级净化法的去除率分别约为88.0%和89.7%,最终去除率约为98.6%的Sr-90。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Study on the Decontamination of Cs-137 and Sr-90 Contained in the Liquid Radioactive Waste Discharged from the Spent Fuel Storage Tank Using Microalgae
In this study, the applicability of microalgae was evaluated for eco-friendly decontamination of cesium-137 (Cs-137) and strontium-90 (Sr-90), which are radioactive nuclides contained in radioactive waste. The monolithic radioactive solution used in the experiment was manufactured at a concentration of 1.5 Bq/mL Cs-137 and 1.0 Bq/mL Sr-90 by diluting a standard radioactive solution and distilled water. This experiment used two types of microalgae, Chlorella Vulgaris was used for Sr-90 decontamination and Hematococcus pluvialis for Cs-137 decontamination. The experimental method is to put the microalgae cultured for 2 weeks into a bottle with a semi-permeable membrane, and then put the bottle in which the microalgae was put into the manufactured radioactive solution, so that the microalgae and the radioactive solution react through the semi-permeable membrane for 48 hours. For the radioactivity concentration analysis of each sample, a gamma-ray nuclide analyzer was used for Cs-137, a γ-ray isotope, and a Liquid Scintillation Count(LSC) was used for Sr-90, a β-ray isotope. As a result of the experiment, it was confirmed that about 88.0 % of Cs-137 and about 89.7 % of Sr-90 could be decontaminated, and about 98.6 % of Sr-90 was finally able to be decontaminated by the two-stage decontamination method.
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