Redundant control for nuclear fuel element grab actuator, comprises centralizing member, and fuel and control element grabs

摘要

A redundant control for a nuclear fuel element grab actuator comprises a centralizing member, and fuel and control element grabs on a cable. The control unit comprises pneumatic elements such as pressure lines, an air container, valves and a measurement and monitoring system. The fuel element grab has two 2/2 way valves (8, 9) arranged in parallel, along with the air container (2). The control element grab (31) has a 3/2 way valve (12) and a 5/3 way valve (13) arranged in series.