Patent ID: 9429503
Filing Date: 2016-08-30
CPC Classification: G01N,Y10T

Claim Text:
1. A test equipment for evaluating piping safety for use in nuclear power plants, the test equipment comprising: a test specimen comprising a same material as the piping, and having a notch cut from a first surface, with a crack formed at an end portion of the notch; and a load applier connected to the test specimen to apply a load in a direction perpendicular to a direction in which the notch is cut, wherein a pair of pins are connected to the load applier though pin holes disposed within the test specimen and perpendicular to the direction in which the notch is cut such that the pin holes are arranged to be distanced from each other along the direction of the load applied to the test specimen, and the pin holes are arranged in a space between a second surface of the test specimen and an end portion of the crack, whereby a stress gradient measured from the test specimen is identical to a stress gradient of the piping.