Example of method 3 "Retrieving fuel debris from the side”

Index > Challenges and Plant information : Overview of methods｜Example of method 3 "Retrieving fuel debris from the side” > (5) Dismantle and remove internal structures

ⅰ) Challenges and reference information : (5) Dismantle and remove internal structures

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

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

(1)Prior preparation

(2)Install barrier

(3)Create opening on the side of PCV

(4) Install equipment and access

(5)Dismantle and remove internal structures

(6)Retrieve fuel debris

(7)Transport canister

(8)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)

Plant information	Schematic diagram for internal structures Dimension and weight of internal structures Atmospheric environment inside PCV (temp, dose rate, etc.) Structure and dimension of PCV Internal structure of bottom part of RPV

Assumptions and prerequisites	PCV/RPV interior air dose rate - PCV interior dose rate 100Gy/h - RPV interior dose rate 1kGy/h

Temporary storage

Preparation of temporary storage
Method for transportation of the internal structures to the temporary storage

Plant information	Plain view (Unit 1) Plain view (Unit 2) Plain view (Unit 3)

Assumptions and prerequisites	Allowable load of 1st. floor : 1.2t/㎡ Size of equipment which should be transported through passageway : Width 1.2m, Height 3m or less

→(6) Fuel debris retrieval