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高速炉蒸気発生器伝熱管の急速加熱時の伝熱特性

Heat transfer characteristics of rapidly heating tube in FBR steam generator

栗原 成計 ; 下山 一仁 ; 門出 政則*; 大島 宏之

Kurihara, Akikazu; Shimoyama, Kazuhito; Monde, Masanori*; Ohshima, Hiroyuki

高速炉蒸気発生器において、万一伝熱管破損が生じた場合にはナトリウムと水が発熱反応を起こし、高温・高腐食性のナトリウム-水反応場を形成する。高温反応場にある隣接伝熱管は内圧により破損する可能性があるため、破損評価の予測精度向上のために正確な水側の熱伝達率の測定が必要不可欠である。そこで、低質量流量・高サブクール条件において内壁の熱流束及び温度にかかわる伝熱特性を明らかにするため実験を行った。

Sodium reacts chemically with water in case of unexpected tube failure of steam generator (SG) in fast breeder reactor (FBR), exoergic reaction produced reaction field with high temperature and high corrosive (sodium-water reaction). Adjacent tubes in the field have possibility of rupture by inner pressure. It is integral to predict the event with high accuracy that we understand characteristics of heat transfer inside tube in detail. Experimental study has been carried out and clarify characteristics of heat flux and temperature on inner wall under low mass flow rate and high subcooling.

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