Fabrication and Installation of Platform type Balance for Nuclear Material Accountability in Hot Cell

A reliable weighing balance is required to accurately measure the nuclear material in bulk form of spent fuel in Advanced spent fuel Conditioning Process (ACP). Because of operation in the isolated hot cell ACP needs to be controllable remotely and to have a more stringent operation conditions compared to the existing fresh fuel handling process. Likewise, safeguards technology currently available has to be also reinforced in the areas of accountability system, measurement system, and containment and surveillance system. Although a bulk weighing balance, as one of the means of special nuclear material accountability, is presently being used the measurement outcome has been very unstable mainly due to large error propagation. This new bulk weighing system has been developed focusing on operational convenience, accuracy, and reliability of the balance. Indicator display in the balance is designed in such way to display the date conveniently and to make it easily maneuverable. The load cell equipped in the weighing platform was chosen to be water proof, not affected by weight distribution on the platform. The Platform is protected from corrosive salts by covering up with SUS316 series. The balance is interfaced with a PC through radiation resistant cable and sharing weighing signals in both sides simultaneously