Decommissioning Group Ketut Kamajaya

Transcription

1 Decommissioning Group Ketut Kamajaya

2 Contents of presentation Briefly history of Bandung TRIGA reactor Location of the facility Decommissioning options Characterization of System, Structure and Component (SSC) Experiences of staff on reactor modification

3 History of Bandung TRIGA reactor (1) Bandung TRIGA Reactor is Indonesia's first nuclear research reactor in Indonesia Year Power Activities kw Reached first criticality kw First time modified kw Second time modified 3

4 History of Bandung TRIGA reactor (2) Year Power Activities Reactor operating license suspended by Regulatory Body because of technical issues related to fuel burn-up (FFCRs) and seismic hazard Prepared a decommissioning plan, proposed IAEA TC programs to get expert mission assistance Experts mission, in helping to prepare the decommissioning plan documents Replaced of two FFCRs and reinforced of the reactor building kw Bandung TRIGA research reactor operates

5 Time journey?

6 Map location of the Bandung TRIGA reactor

7 The Bandung TRIGA reactor is located in (A) building

8 In the preparation of decommissioning plan we have two options OPTION 1 o All System, Structure and Component (SSCs) inside and outside the reactor building are dismantled, except the reactor building. o In addition, all laboratories supporting like hot cells and laboratories for the production of radioisotopes is not dismantled.

9 OPTION 2. o All SSCs inside the reactor tank are removed, but a part of the reactor tank, reactor shield is not dismantled. o So in the long term, the Bandung TRIGA reactor building can be used as reactor museum.

10 Only the cross hatched red part needed to be disposed of as radioactive waste

11 System, structure and component of Bandung TRIGA reactor

12 Stages of characterization Drawing of SSCs of the reactor Identify building and room of facilities according to decommissioning scope Identify contaminated & non-contaminated areas according to the controlled area definition Determine quantities of various materials (carbon, SS steel, concrete, hazardous...) Inventory of material radioactivity

13 Outline of Bandung TRIGA Reactor 1. Reactor Building (RB) 2. Secondary Circuit Building (SB) 3. Cooling Tower (CT) 3. CT 2.SB 5.ST 4. Water Purification Room (WP) 5. Ventilation Stack (ST) 4. WP 6. Laboratory Building (LB) 1. RB 6. LB

14 Rooms in RB (Reactor Building) No. Bldg Room name Room No., 1 RB Primary cooling circuit room A Primary cooling circuit room 2 RB Spent fuel storage wet pit A Spent fuel storage wet pit 5. Reactor hall 6. Reactor 3 RB Fresh fuel storage A RB Equipment warehouse A RB Reactor hall A RB Reactor A RB Control room A Fresh fuel storage 4. Equipment warehouse 7. Control room

15 Room of WP, CT and SB 10. Cooling towers No Bldg Room name Room No. 9 SB Secondary pump room A CT Cooling towers CT01 11 WP Water Purification room A Water purification room 9. Secondary pump house

16 Rooms in 1F of LB (Laboratory Building) No Bldg Room name Room No. 13 AB Blue Blower A AB Yellow Blower A Blue Blower 14. Yellow Blower

17 Room in Roof of LB No Bldg Room name Room No. 12 AB Filter housing AB Filter housing

18 Room of ST No. Bldg. Room name Room No. 15 ST Ventilation stack ST Ventilation stack

19 The SSCs contained in the reactor tank

20 A rotary specimen rack has high radiation exposure

21 An experience to transfer of a rotary specimen rack (By crane in the reactor hall)

22 A rotary specimen rack data (By IAEA Experts)

23 An experience of thermalizing column demolition Empty bulk shielding tank; Open the door thermalizing column; Remove the graphite plate and Pb.

24 Graphite block at thermalizing column

25 Demolition of primary cooling system and HE

26 List of rooms have been characterized for dismantling No. Bldg. Room No. ID Room name Primary Cooling 1 RB A Circuit Room 2 RB Spent fuel A storage wet pit 3 RB Fresh fuel A storage 4 RB A Equipment warehouse Controlled area Width (m) Length (m) Height Surface area (m) (m 2 ) Floor Final survey area (m 2 ) (m 2 ) Dose (usv/h) Sc (Bq/cm 2 ) Y <0.37 Y <0.37 Y <0.37 Y < RB A10057 Reactor hall Y < RB A Reactor Y < RB A Control room Y < SB A10058 Secondary pump house N CT CT01 Cooling towers N x WP A10059 Water purification room N LB LB01 Filter housing N LB A10030 Blue blower N LB A10031 Yellow blower N ST ST01 Ventilation stack Y <0.03 <0.37 3, , * Sc: Surface contamination

27 List of equipment for dismantling Distribution of number of equipment for dismantling in each building Distribution of total mass of equipment for dismantling in each building Rooms in RB 85% Total: 149 Rooms in RB 88% Total: 666tons Ventilation stack 1% Cooling towers 2% Water purificatio n room 1% Secondary pump house 4% Rooms in LB 7% [CATEGOR Y NAME] 8% Cooling towers 1% Water purificatio n room 1% Secondary pump house 1% Rooms in LB 1%

28 THANK YOU for your attentation