Abstract: A flexi-rail assembly for supporting and positioning tools for inspecting a nuclear power plant steam generator. The flexi-rail assembly includes a housing; at least one lock assembly carried by the housing for coupling the housing to a support structure; and a carriage assembly movably supported by the housing for supporting and positioning inspection tools such as a robot manipulator arm and leg assembly. The housing includes a hollow rear portion for receiving at least one cylinder supporting a movable surface, wherein the cylinder is coupled to a source of pressurized fluid. The housing also supports at least one recessed surface for receiving the lock assembly. The lock assembly includes the cylinder and at least one tubular member. The tubular member includes an open center and at least two openings formed in the surface of the tubular structure.

Abstract: To prevent damage to the electrical connections between PLC modules and a backplane during seismic and other vibrational disturbances, a bracket is used having two parallel side members attached to the backplane and a lower support bar connected between the side members to support the PLC modules in the vertical direction. An upper support bar may also be provided between the side plates to hold the PLC modules in the bracket and further prevent vertical movement. The upper and lower support bars may also provide vertical members or a rest in contact with the PLC modules and having a high coefficient of friction to prevent lateral movement of the PLC modules with respect to the backplane.