In-line gas chromatograph for analysis of UF6 and/or F2.
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概要
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With the view of continuous analysis of UF<SUB>6</SUB> and/or F<SUB>2</SUB> in the fluorination of U for the development of the fluoride volatility process, an in-line gas chromatograph, made of anti-corrosive materials against the fluorides, has been constructed using two different columns and automatic sampling system.<BR>The separation columns used, were optimized for the simulated process gas compo-sition {(N<SUB>2</SUB>, O<SUB>2</SUB>, F<SUB>2</SUB>)/(UF<SUB>6</SUB>)=18, (N<SUB>2</SUB>, O<SUB>2</SUB>)/(F<SUB>2</SUB>)=3.3}, in order to obtain the complete peak separation. The column selected for UF6 analysis is 0.4 cmφ Cu tubing of 3 m long packed with 40w/o of poly-trifluoromonochloro-ethylene oil which is loaded on poly-tetrafluoro-ethylene powder. The column for F<SUB>2</SUB> analysis is the combination of the above column with a conversion column of 0.4 cmφ tubing of 2 m long packed with KCl powder.<BR>Under these column conditions, the analytical time is 9 and 3 min for UF6 and F<SUB>2</SUB>, respectively at the flow rate of 100 ml/min. The calibration curves are linear with a zero intercept, and the analytical limits are, respectively 0.2 and 1 mmHg in partial pressures of UF<SUB>6</SUB> and F<SUB>2</SUB> with 10ml of sampling volume.<BR>In actual adaptation to the fluorination of uranium oxides, the in-line gas chromato-graph was satisfactorily able to measure the reaction rate and to detect the end of fluorination.
- 一般社団法人 日本原子力学会の論文
著者
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TSUJINO Takeshi
Fuel Reprocessing Laboratory, Division of Nuclear Fuel Research, Japan Atomic Energy Research Institute
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SUGIKAWA Susumu
Fuel Reprocessing Laboratory, Division of Nuclear Fuel Research, Japan Atomic Energy Research Institute