This Bolt Tensioner is a device to use in the case of opening and the restoration of the pressure vessel (R/V) of the nuclear reactor. It is a device to use that this device lowers Stud Bolt of the pressure vessel and closes it.
At present in Japanese nuclear plants, 51 plants, our Bolt Tensioner are working.
・Safety-operation by full-automatic drive.
a) Remote-operation from operation floor, decrease influence of radiation.
b) No needs manual operation, positioning and nut-run.
・Possible to decrease operation stuffs and cost.
・Convenient multi-function display.
Display mode : status of tensioning in real time. elongation of each bolt and step,
and so on.
・Flexible operation mode for trouble and tensioner failure.
・Easy maintenance : Recent model sequencer is mounted in this system.