在2011年福岛核事故之后，人们对于核反应堆燃料在正常工况和瞬态工况下的安全性和可靠性的方面提出了更高的要求，驱使着核燃料技术向更安全、更可靠且更经济的方向发展，并由此提出了事故容错燃料。介绍了国内外FeCrAl辐照脆化机理及模型、辐照脆化的数值模拟以及实验研究现状。

After the Fukushima nuclear accident in 2011, people put forward higher requirements for the safety and reliability of nuclear reactor fuel under normal and transient conditions, driving the development of nuclear fuel technology towards a safer, more reliable and more economic direction, and thus put forward the accident-tolerant fuel. The mechanism and model of FeCrAl irradiation embrittlement at home and abroad, numerical simulation and experimental research status of irradiation embrittlement are introduced.