Fuel monitoring facility extension manufacturing of the in-cell crane equipment

Kodaka, Hideo; Nakamura, Yasuo

Three different kinds of In-Cell Crane Equipment were designed from 1989 to March 1990, manufactured, and installed in the Fuel Monitoring Facility (FMF) Extension in 1994. These equipments consists of an in cell crane, a power manipulator, and a repair hoist. Their outline is shown as follows. (1)The in cell crane was designed to handle and transfer the reactor components such as irradiated fuel subassemblies, and/or heavy equipments in the examination cell. Its basic function and structure is similar to an industrial ceiling run way crane, except for its design for hot lob. use. Namely, this is also designed specially to permit their remote dismantling and assembling in the cell, because workers have impossible access to the crane due to high radioactivity and nitrogen atmosphere in the cell, when a trouble occurs on the in cell crane itself. (2)The power manipulator has various function such as transferring specimens lighter than a few ten kilograms within the cell, and/or helping operation and maintenance of other equipments. This manipulator is operated by a computer, so that it is able to transfer a rack filled with irradiated fuel pins automatically by changing its manipulator arm to specially designed tool. It has remote dismantling and assembling capability as same as the in cell crane. (3)The repair hoist was designed to hoist a bridge, a carriage and trolley of the in cell crane and the power manipulator up and down, in case of their maintenance. It was installed in the third floor of the FMF Extension and reach the crane and the manipulator through ceil of the examination cell. This enable complete remote maintenance of these equipments.