Experimental investigation of reaction behavior between carbon dioxide and liquid sodium

二酸化炭素と液体ナトリウムの反応挙動に関する実験研究

宮原 信哉  ; 石川 浩康 ; 吉澤 善男*

Miyahara, Shinya; Ishikawa, Hiroyasu; Yoshizawa, Yoshio*

ナトリウム(Na)と二酸化炭素(CO)との熱交換器における伝熱管破損の結果を理解するため、COとNaプールとの反応挙動を実験的に研究した。実験は基礎実験と伝熱管破損を模擬した実証試験の二種類行った。これらの実験結果から、ある閾温度以上で発熱反応が発生すること、反応に伴う温度や圧力上昇、プール中の固体の反応生成物の挙動等のNaとCOとの熱交換器における伝熱管破損事故の結果を評価するために必要となる有益で不可欠な情報を得た。

Reaction behavior of carbon dioxide (CO) with a liquid sodium pool was experimentally investigated to understand the consequences of boundary tube failure in a sodium-CO heat exchanger (HX). In this study, two kinds of experiments, namely fundamental experiment and demonstration experiment which simulate the incident of CO leakage in HX, were carried out to investigate the reaction behavior. From these experiments, it became clear that the exothermic reaction occurred above a threshold temperature, and useful and indispensable information such as the resulting temperature and pressure rise and the behavior of solid reaction products in the pool was obtained to evaluate the consequences of boundary tube failure incident in the sodium- CO heat exchanger.