Example of method 1 "Retrieving fuel debris from the top (fixed transporting equipment)”

ⅰ) Challenges and reference information : (6) Dismantle and remove internal structures

Task(s): Method for dismantling of internal equipment, transport and storage after dismantling.

(6) Dismantle and remove internal structures - Major challenges on the actual method

(1)Prior preparation (2)Install barrier (3) Remove shield plug (4) Remove PCV/RPV upper head (5) Install equipment and access (6) Dismantle and remove internal structures (7)Retrieve fuel debris (8) Collect fuel debris and Transfer canister (9) Clean-up equipment

Removal

  • Method for cutting/dismantling/removing the internal structures
  • Equipment to be used for the method
    (Out of scope of the cutting and dust collection technology written in the RFP)
  • Cooling method when current water cooling system becomes unavailable
Plant information

Temporary storage

  • Preparation of temporary storage
  • Method for transportation of the internal structures to the temporary storage
Plant information
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