Methods, apparatus and equipment for determining the variation in crack width in the containment structure of nuclear power plants

Abstract

This application relates to a method, apparatus, computer equipment, storage medium, and computer program product for determining the width change of cracks in the containment structure of a nuclear power plant. The method includes acquiring a first measured width change of the crack as measured by a high-precision displacement sensor and a first core temperature of the high-precision displacement sensor, and acquiring a first concrete temperature on the outer surface of the containment structure at the installation location of the high-precision displacement sensor; determining a first width change caused by the volume change of the core based on the thermal expansion coefficient of the core and the first core temperature; determining a second width change caused by the volume change of the concrete based on the target cracking coefficient and the first concrete temperature; and determining the true width change of the crack based on the first measured width change, the first width change, and the second width change. The method provided in this application enables a more accurate determination of the crack width change caused by the pressure test.

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