Parts of nuclear fuel assembliesとは 意味・読み方・使い方

To reduce construction costs and decrease power generation costs by shortening the lower parts of reactor structural materials though they are required to be about three times as long as nuclear fuel assemblies because they need a space for accommodating control rods below a core, further below which a space for a control rod drive mechanism is required.例文帳に追加

原子炉構造材は炉心の下部に制御棒を収納するスペース、更にその下部に制御棒駆動機構のスペースが必要であり、核燃料集合体の約３倍の長さが必要である。 - 特許庁