メルトスルー

メ

ル

ト

ス

ル

ー

Meanings

1

melt-through

Technical term in nuclear engineering: the melting of nuclear fuel through the reactor containment vessel.

放ほう

出しゅつ

さ

れる

危き

険けん

性せい

が

高たか

まる

。

If a melt-through occurs, the risk of radioactive materials being released into the environment increases.

メルトダウン
メルトダウン (meltdown) refers to the melting of the reactor core itself, while メルトスルー specifically means the melted fuel breaches the containment vessel.

Borrowed from English 'melt-through', a compound of 'melt' and 'through'.