Evaluation of UF6 vapor release in postulated accident.

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概要

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• The rupture of UF<SUB>6</SUB> gas line connected to hot UF<SUB>6</SUB> cylinder, being one of various accidents in UF<SUB>6</SUB> vapor leak-out, is considered as a postulated accident for uranium enrichment plants. For this type of rupture, we will estimate the amount of UF<SUB>6</SUB> vapor release based on a simplified calculation model and then make an evaluation of UF<SUB>6</SUB> vapor release through a ventilation system of feed vaporization facility. Assuming an instantaneous steady state for the change of UF<SUB>6</SUB> states, an unsteady state thermodynamics process is solved. Numerical examples show that about 52% of the initial UF<SUB>6</SUB> quantity are vaporized at 80°C (the temperature of the liquid UF<SUB>6</SUB> in the cylinder). Furthermore, by using the amount of released UF<SUB>6</SUB> vapor and the collection capacity of HEPA filter for HF gas, the amount of gaseous UO<SUB>2</SUB>F<SUB>2</SUB>, HF which may be dissipated to the environment are conservatively estimated.

• 一般社団法人 日本原子力学会の論文

著者

• OKAMOTO Tsuyoshi

  Department of Nuclear Engineering, Faculty of Engineering, University of Tokyo

関連論文

• Evaluation of UF6 vapor release in postulated accident.

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