The flow interruption capability test of valve is used for researching the capability of the valves used in nuclear power plants emergently shut off the flow,when the reactor loop is in emergency situations,especially in the design basis accident conditions.This test is one of the most difficult tests in the functional The flow interruption capability test of valve is used for researching the capability of the valves used for nuclear power plants emergently shut off the flow, when the reactor loop is in emergency situations, especially in the design basis accident conditions. This test is one of the most difficult tests in the functional