Abstract
An approach to extension of the design lifetime of pipelines in fast neutron reactors to 45 years of operation is proposed. For this purpose, a nondestructive method for testing metal under creep under operating conditions without using specimens is developed. The method is based on long-lasting indentation of a ball indenter in the most heavily loaded areas of the pipelines. A relation between the tensile creep and indentation creep parameters is obtained.
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