Bolt Tensioner

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.

Features

・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.