Other drawbacks are that active-cooling systems involve additional weight and complexity and that they must stay active, because loss of the fuel coolant will lead to catastrophic structural failure.

• 另外的缺点是，主动散热系统会带来额外的重量与复杂度，而且必须一直保持运作，因为失去燃料冷却剂将会招致毁灭性的结构破坏。