Task(s): Installation of equipment, transporting control and management of ventilation inside the boundary.

(5) Install equipment and access - Major challenges on the actual method

Installation of equipment

• Installation and stabilization of the cutting, transporting equipment required for post-process
  - Dismantling and removal of internal structures
  - Retrieving fuel debris
  - Storage of fuel debris and transfer of canisters
  - Remote detachment
  
• Maintenance of equipment and actions to trouble

Plant information	Work space on the operation floor (Plain view) Atmospheric environment inside PCV (temp, dose rate, etc.) Schematic diagram for internal structures Internal structure dimension/weight

Assumptions and prerequisites

Allowable load of operation floor and passageway : 1.2t/㎡ Size of equipment which should be transported through passageway : Width 1.2m, Height 3m or less Overhead crane specification (Rated load 100t） Air dose rate inside the PCV/RPV - Dose rate inside the PCV 100Gy/h - Dose rate inside the RPV 1kGy/h Effective dose rate outside the PCV - Operation floor : 1mSv/h - Operation areas except for operation floor : 3mSv/h - Passageway inside the building : 5mSv/h Total weight of equipment installed on the operation floor shall be minimized in consideration of seismic safety.

Control of Transportation

• Operation range of works that workers conduct directly or remotely
• Method for operating, monitoring and controlling the transport of equipment

Plant information	Work space on the operation floor (Plain view) Atmospheric environment inside PCV (temp, dose rate, pressure, etc.) Schematic diagram for internal structures Dimension and weight of internal structures

Assumptions and prerequisites

Allowable load of operation floor and passageway : 1.2t/㎡ Size of equipment which should be transported through passageway : Width 1.2m, Height 3m or less Overhead crane specification (Rated load 100t） PCV/RPV interior air dose rate - PCV interior dose rate 100Gy/h - RPV interior dose rate 1kGy/h Effective dose rate outside the PCV - Operation floor : 1mSv/h - Operation areas except for operation floor : 3mSv/h - Passageway inside the building : 5mSv/h Total weight of equipment installed on the operation floor shall be minimized in consideration of seismic safety.

Set-up of Ventilation

• Design of required air quantity and specification of ventilation facilities
• Installation of ventilation/exhaust equipment
• Prevention of radiological release into external environment
• Exchanging air ventilation filter

Plant information	Location and amount of fuel debris Atmospheric environment inside PCV (temp, dose rate, etc.)

→(6) Dismantle and remove internal structures