The Decommissioning Dismantling Technology Demonstration Field　is equipped with facilities that allow to virtually experience the inside of the plant “Fugen” with the actual scale and realistic sensation using a Mixed Reality (MR) system. The facility enables to carry out the required process for decommissioning work such as prior confirmation and examination of the site, confirmation of operability of the equipment and prediction of the radiation dose of workers.

In order to carry out the decommissioning work safely and rationally, sufficient examination of work procedures in advance is necessary. One of appropriate way for examination is to use the Mixed Reality (MR) system that allows virtual experience of the site with actual size and realistic sensation, without entering the site.

The MR system enables visualization of the dose equivalent rate (mSv/h) at the site, examination of the dismantling procedure of the facility, examination of the installation place and the size of the temporary equipment (scaffolds, curing materials, shields) and confirmation of carry-in routes and the interference of the equipment necessary for dismantling work.

The MR system is installed in the MR System Development Room and consists of a Head Mounted Display (HMD), a PC for MR, optical cameras, a 50 inch display and so on.

By detecting the position and posture of the HMD and the hand tool with the optical cameras, it allows the MR experiencing person to see the correct 3D display image. The motion space of MR is about 4.5m in width × 4.0m in depth × 2.5m in height, and it is possible to experience the site while moving through this space.

One person can experience MR at a time and people other than the experiencing person can see the images viewed by the experiencing person as 2D images on the display.

Configuration of MR system

This MR system is supposed to be utilized for the purpose of developing human resources and improving technical skills in order to support companies in Fukui Prefecture that wish to enter the decommissioning work. In addition, it is expected to be used for practical lessons for university students, etc.

Table-1 Main Specification for MR system

Figure-1 Configuration of MR system (MR System Development Room)

Training with Mixed Reality (MR) System

The MR system is applied to decommissioning work to be used for observing the inside of the plant from the worker’s point of view with the actual scale, and also for education and training of optimum working procedures in each phase of the progress of the decommissioning work such as carrying in/out, installation and dismantling, etc. of equipment.

"Major features"

1. Examination of optimum work procedures

2. Examination of exposure dose of workers

3. Confirmation of workability

(Tool interference, Working posture, etc.)

●Controlled area

[ Reactor auxiliary building ]

1st floor: Heat exchanger room in a reactor cleanup system

[ Reactor building ]

1st floor: Whole area

Pump floor: Whole area

6th floor: Whole area

Motor floor to Drums floor Loop A side

●Non-controlled area

[ Reactor auxiliary building ]

3rd floor: General ventilation equipment "200 series"

2nd basement: Zinc injection device

[ Turbine building ]

1st basement: Air compressor

(Instrumentation air system, General service air system)

[ Outside of buildings ]

Incinerator for general wastes

Equipment for intake

(Circulating water pump, Dust removing device for seawater, etc.)

Available range of "Fugen" point cloud data (PDF) (Japanese only)