Evaluation of sodium trapping efficiency of mesh-pack-type sodium vapor trap.
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概要
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In order to improve performance of sodium vapor traps, the effects of the operating conditions on the sodium trapping efficiency has been analyzed using a simplified model of the mesh packed region. Then experimental work was performed to evaluate the model validity.<BR>The calculated and the measured values agreed with the maximum deviation of 15%, which led to the following conclusions :<BR>(1) When mist containing sodium vapor is supplied to the vapor trap, the sodium trapping efficiency is greatly lowered because of condensation of vapor to mist.<BR>(2) Even if the sodium vapor contained no mist initially, mist is formed when the cover gas is cooled so rapidly that the nuclei for condensation begin to grow. This mist formation causes a decreased sodium trapping efficiency.<BR>(3) The sodium trapping efficiency can be maximized by selecting restrictive conditions for the vapor trap operation, where the inlet sodium vapor concentration in cover gas is kept in a state of unsaturated and the relative heat capacity rate of the cooling air to the flowing cover gas is maintained between 2 and 5.
- 一般社団法人 日本原子力学会の論文
著者
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YAMAMOTO Hajime
Energy Research Laboratory, Hitachi Ltd.
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YAMAMOTO Hajime
Energy Research Laboratory, Hitachi Ltd. Hitachi Works, Hitachi Ltd.
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MURAKAMI Nobuo
Energy Research Laboratory, Hitachi Ltd. Hitachi Works, Hitachi Ltd.
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