Decommissioning Group Ketut Kamajaya
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
History of Bandung TRIGA reactor (1) Bandung TRIGA Reactor is Indonesia's first nuclear research reactor in Indonesia Year Power Activities 1964 250 kw Reached first criticality 1971 1000 kw First time modified 2000 2000 kw Second time modified 3
History of Bandung TRIGA reactor (2) Year Power Activities 2011 - Reactor operating license suspended by Regulatory Body because of technical issues related to fuel burn-up (FFCRs) and seismic hazard. 2013 - Prepared a decommissioning plan, proposed IAEA TC programs to get expert mission assistance. 2014-2015 - Experts mission, in helping to prepare the decommissioning plan documents 2015 - Replaced of two FFCRs and reinforced of the reactor building 2016 1000 kw Bandung TRIGA research reactor operates
Time journey? 1964 2000 2013 2015 1971 2011 2014 2016 5
Map location of the Bandung TRIGA reactor
The Bandung TRIGA reactor is located in (A) building
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.
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.
Only the cross hatched red part needed to be disposed of as radioactive waste
System, structure and component of Bandung TRIGA reactor
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
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
Rooms in RB (Reactor Building) No. Bldg Room name Room No., 1 RB Primary cooling circuit room A10057.01 1. Primary cooling circuit room 2 RB Spent fuel storage wet pit A10057.02 2. Spent fuel storage wet pit 5. Reactor hall 6. Reactor 3 RB Fresh fuel storage A10057.03 4 RB Equipment warehouse A10057.04 5 RB Reactor hall A10057 6 RB Reactor A10057.00 7 RB Control room A10057.05 3. Fresh fuel storage 4. Equipment warehouse 7. Control room
Room of WP, CT and SB 10. Cooling towers No Bldg Room name Room No. 9 SB Secondary pump room A10058 10 CT Cooling towers CT01 11 WP Water Purification room A10059 11. Water purification room 9. Secondary pump house
Rooms in 1F of LB (Laboratory Building) No Bldg Room name Room No. 13 AB Blue Blower A10030 14 AB Yellow Blower A10031 13. Blue Blower 14. Yellow Blower
Room in Roof of LB No Bldg Room name Room No. 12 AB Filter housing AB01 12. Filter housing
Room of ST No. Bldg. Room name Room No. 15 ST Ventilation stack ST01 15. Ventilation stack
The SSCs contained in the reactor tank
A rotary specimen rack has high radiation exposure
An experience to transfer of a rotary specimen rack (By crane in the reactor hall)
A rotary specimen rack data (By IAEA Experts)
An experience of thermalizing column demolition Empty bulk shielding tank; Open the door thermalizing column; Remove the graphite plate and Pb.
Graphite block at thermalizing column
Demolition of primary cooling system and HE
List of rooms have been characterized for dismantling No. Bldg. Room No. ID Room name Primary Cooling 1 RB A10057.01 Circuit Room 2 RB Spent fuel A10057.02 storage wet pit 3 RB Fresh fuel A10057.03 storage 4 RB A10057.04 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 1.8 5.4 2.3 42.84-42.84 0.08 <0.37 Y 1.6 1.6 1.5 12.16-12.16 0.32 <0.37 Y 3.3 1.0 2.5 28.10 3.30 28.10 0.05 <0.37 Y 3.3 2.0 2.5 39.70 6.60 39.70 0.05 <0.37 5 RB A10057 Reactor hall Y 24.5 19.5 12.9 2090.70 477.75 2090.70 0.06 <0.37 6 RB A10057.00 Reactor Y 7.0 8.6 7.5 354.40-35.40 0.38 <0.37 7 RB A10057.05 Control room Y 3.5 4.9 2.9 83.02-83.02 0.05 <0.37 8 SB A10058 Secondary pump house N 10.5 3.5 4.0 185.50 - - - - 9 CT CT01 Cooling towers N 12.5 15.0 x 187.5 - - - - 10 WP A10059 Water purification room N 5.0 2.5 4.0 85.00 - - - - 11 LB LB01 Filter housing N 2.0 2.0 2.0 24.00 - - - - 12 LB A10030 Blue blower N 3.6 3.6 4.0 83.52 12.96 - - - 13 LB A10031 Yellow blower N 3.6 2.6 4.0 68.32 9.36 - - - 14 ST ST01 Ventilation stack Y 1.4 1.7 22.5 144.26-144.26 <0.03 <0.37 3,429.02 509.97 2,331.92 * Sc: Surface contamination
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%
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