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

3

Year Power Activities

1964 250 kW Reached first criticality

1971 1000 kW First time modified

2000 2000 kW Second time modified

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

1964 2000 2013 2015

1971 2011 2014 2016

Time journey

… ?

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

oAll 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.

oAll 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

6. LB

2.SB 3. CT

5.ST

1. Reactor Building (RB)

2. Secondary Circuit Building (SB)

3. Cooling Tower (CT)

4. Water Purification Room (WP)

5. Ventilation Stack (ST)

6. Laboratory Building (LB)

1. RB

4. WP

Outline of Bandung TRIGA Reactor

No. Bldg Room name Room No.,

1 RB Primary cooling circuit

room A10057.01

2 RB Spent fuel storage wet

pit A10057.02

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

1. Primary cooling

circuit room

2. Spent fuel storage wet pit

3. Fresh fuel storage

4. Equipment warehouse

5. Reactor

hall

6. Reactor

7. Control

room

Rooms in RB (Reactor Building)

11. Water purification room 9. Secondary pump house

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

Room of WP, CT and SB

14. Yellow Blower

13. Blue Blower

No Bldg Room name Room No.

13 AB Blue Blower A10030

14 AB Yellow Blower A10031

Rooms in 1F of LB (Laboratory Building)

12. Filter housing

No Bldg Room name Room No.

12 AB Filter housing AB01

Room in Roof of LB

15. Ventilation stack

No. Bldg. Room name Room No.

15 ST Ventilation stack ST01

Room of ST

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.

ID Room No. Room name

Controlled

area

Width

(m)

Length

(m)

Height

(m) Surface area

(m2)

Floor

area (m2)

Final survey

(m2)

Dose

(uSv/h)

Sc

(Bq/cm2)

1 RB A10057.01 Primary Cooling

Circuit Room Y 1.8 5.4 2.3 42.84 - 42.84 0.08 <0.37

2 RB A10057.02 Spent fuel

storage wet pit Y 1.6 1.6 1.5 12.16 - 12.16 0.32 <0.37

3 RB A10057.03 Fresh fuel

storage Y 3.3 1.0 2.5 28.10 3.30 28.10 0.05 <0.37

4 RB A10057.04 Equipment

warehouse 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

Rooms in RB

85%

Rooms in LB 7%

Secondary pump house

4%

Water purificatio

n room 1%

Cooling towers

2%

Ventilation stack

1%

Total:

149

Rooms in RB

88%

Rooms in LB 1%

Secondary pump house

1%

Water purificatio

n room 1%

Cooling towers

1%

[CATEGORY NAME]

8%

Total:

666tons

Distribution of total mass of equipment for dismantling in each

building

THANK YOU

for your attentation