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.

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。

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Results show that the alloy in aging state, especially in deformation-aging state, is apparently susceptible to hydrogen embrittlement.

结果表明，时效状态、特别是形变时效状态合金具有明显的氢脆敏感性。

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