分析表明，中子辐照脆化、腐蚀损伤、疲劳及磨损引起核电厂不可更换部件及更换困难部件的老化、降级是制约或极大程度影响电厂寿命的关键问题。

The results show that neutron radiation embrittlement, corrosion damage, fatigue and wear are the key issues which cause aging or degradation of un replaceable or difficultly replaceable components.

youdao