Separation system for HLLW by using CMPO impregnated silica adsorbent

Takahiro Kikuchi, Ichiro Goto, Tsuyoshi Arai, Kazunori Suzuki

研究成果: Article査読

2 被引用数 (Scopus)

抄録

The process concept of separation system of high-level radioactive liquid waste (HLLW) using an octylphenyl-N,N-diisobutylcarbomoyl phosphine oxide impregnated silica adsorbent (CMPO-adsorbent) was designed for separation of Cs and Sr. The process consists of two separation steps. Each step is composed of three CMPO-adsorbent columns, and the adsorbents are used in rotation for separation of HLLW. That is, the system has six columns. Uranium and Zirconium inhibit the adsorption of minor actinoids (MA) and lanthanoids. Therefore, the adsorption and removal of U and Zr from the HLLW occur in the 1st step. Adsorbed U and Zr are eluted using citric acid. The HLLW from the 1st step is sent to the 2nd step to adsorb MA, lanthanoids and other transition metals. MA and lanthanoids are eluted using 0.01 mol/dm3 HNO3, and Mo is recovered by using oxalic acid. The process required a large amount of citric acid and oxalic acid, but these eluents can be reused, therefore the amounts of spent acids are reduced. The column adopted a cartridge form in consideration of the exchange of adsorbent. The bed volume of the adsorbent is 0.67 m 3/column. The size of separation plant has 60 m length, 80 m breadth and 36 m height.

本文言語English
ページ(範囲)196-204
ページ数9
ジャーナルTransactions of the Atomic Energy Society of Japan
6
2
DOI
出版ステータスPublished - 2007 6月
外部発表はい

ASJC Scopus subject areas

  • 原子力エネルギーおよび原子力工学
  • 安全性、リスク、信頼性、品質管理

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