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

(4) 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	Atmospheric environment inside PCV (temp, dose rate, etc.) Schematic diagram for internal structures

Assumptions and prerequisites

Allowable load / Dimensional limit of access routes - Withstand load of floor and passageway : 1.2t/㎡ - Size of equipment which should be transported through passageway : Width 1.2m, Height 3m or less Air dose rate inside the PCV/RPV - Dose rate inside the PCV100Gy/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 where workers do directly and remotely
• Method for operating, monitoring and controlling the transport of equipment

Plant information	Atmospheric environment inside PCV (temp, dose rate, etc.) Schematic diagram for internal structures

Assumptions and prerequisites

Allowable load / Dimensional limit of access routes - Allowable load of floor and passageway : 1.2t/㎡ - Size of equipment which should be transported through passageway : Width 1.2m, Height 3m or less Air dose rate inside the PCV/RPV - Dose rate inside the PCV100Gy/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.

Set-up of Ventilation

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

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

→(5) Dismantle and remove internal structures