Annular fuel assembly grillage shearing detection device and method

The invention belongs to the technical field of nuclear fuel element manufacturing, and particularly relates to an annular fuel assembly grillage shearing detection device and method. According to the shearing sample for welding the annular fuel assembly grillage, two grillage lattice cells are correspondingly welded to the two faces of a guide pipe, in the testing process, one grillage lattice cell needs to be fixed, then external force is applied to the guide pipe through a testing machine, and the guide pipe is separated from the grillage lattice cells under the action of shearing force. A special shearing tool is designed, and the annular fuel assembly guide pipe and a grillage welding sample are always subjected to shearing force without the action of other forces in the shearing test process. The welding tongue piece can be effectively fixed, the guide pipe can be effectively supported, the inaccurate result caused by the fact that the guide pipe is scratched by the side face can be avoided in the test,