MONITORING MEETING

EFDA Technology Workprogramme 2005

Activities 2005-2006

Field: Safety and Environment

Task Area: Waste Management

TW5-TSW-001

Mol, June 27th, 2006: L. Ooms, S. Leblanc

MONITORING MEETING

Deliverable 2: Define the activity limits for the dismantling, melting, fabrication or reuse and waste.

Deliverable 7: Define the categories of materials based on the different paths in the material cycle of a fusion reactor.

Deliverable 8a: Define the R&D needs.

Del. 2: Activity limits

Waste Class Dose rateD (mSv/h)

Heat generatedQ (W/m³)

Clearance index IC

NAW < 0,001 - < 1

SRM 0,001 < D < 2 < 10 > 1

CRM 2 < D < 20 < 10 > 1

PDW > 20 > 10 > 1

Actual Limits

Melting facilities

200 Bq/g (average)

Fusion classification

Operator: 20mSv/yPublic: 10µSv/yTransport: 2 mSv/h (contact); 0,1 mSv/h (at 2m)

Dose rate

NAW SRM CRM PDW

RECYCLING EXTENSION of RECYCLING

Non-RECYCLED

HOR RHR 

10 µSv/h 2 mSv/h1µSv/h 10 mSv/h 20 mSv/h

Recycling of fusion materials

Hands On Recycling Remote Handling Recycling

Del. 2: Activity limits

Case study of defined limits for HOR

Melting facilities → 1000 Bq/g ► 4 µSv/h ► 6.4 mSv/y

Other Doc’s → 10 µSv/h ► 16 mSv/y (1600 h, full exposure)

Full exposure = 8 hours a day, 200 working days a year

Simulation 10% exposure ► 125 µSv/h as limit value!

Del. 2: Activity limits

Remote Handling Facilities

Del. 2: Activity limits

Activation analyses (PPCS Model AB)

→ maximum dose rates up to 1.2 E4 Sv/h (10 days decay)

Hot cell facilities at SCK•CEN:

•Laboratory for Low and High Activities

•Hot cell BR2

Building for Vitrified waste at Belgoprocess

→ dose rates up to 1.4 E4 Sv/h.

NAW SRM CRM PDW

HOR RHR  

1µSv/h 100 µSv/h 20 mSv/h

NAW SRM CRM PDW

HOR RHR 

Del. 2: Activity limits

OR

The limits defined in the past can be increased for HOR.

Since facilities exist for remote handling of high active materials the limit for RHR is higher than the dose rate of the fusion materials.

Conclusions:

Del. 2: Activity limits

Draft report ► beginning of July

MONITORING MEETING

Deliverable 2: Define the activity limits for the dismantling, melting, fabrication or reuse and waste.

Deliverable 7: Define the categories of materials based on the different paths in the material cycle of a fusion reactor.

Deliverable 8a: Define the R&D needs.

Del. 7: Material paths

  Model AWCLL

Model BHCPB

Model ABHCLL

BLANKET Li-Pb

EUROFERB

Li4SiO4 Be

EUROFER

Li-Pb EUROFER

DIVERTORCuCrZr

WWC

W W alloy

EUROFER

W alloy EUROFER

W

IN VESSEL SHIELD EUROFEREUROFER

ZrH1,6HTS : EUROFER

LTS : EUROFER + WC

VACCUM VESSELSSB

SSB

SS B

Materials used in the different plant models

Model A decay period 50 years

2.E+06 6.E+06 6.E+069.E+063.E+06

4.E+062.E+07

4.E+078.E+06

2.E+072.E+07

4.E+066.E+03 4.E+04

0.E+00

1.E+07

2.E+07

3.E+07

4.E+07

5.E+07

PDW CRM SRM NAW

Mas

s (k

g)

Model A decay period 100 years

1.E+077.E+05

2.E+07

1.E+07

8.E+06 4.E+07

3.E+02

1.E+07

3.E+07

5.E+04

0.E+00

1.E+07

2.E+07

3.E+07

4.E+07

5.E+07

6.E+07

7.E+07

8.E+07

PDW CRM SRM NAW

Mas

s (k

g)

Del. 7: Material paths

0.00E+00

1.00E+04

2.00E+04

3.00E+04

4.00E+04

Mass (ton)

Eurofer 316 SS LiPb Coil Boron WC

Material

Model A: 100y decay

SRM

CRM

Model AB: W and W-alloyModel AB: same excercise to be

performed

Del. 7: Material paths

Divertor: 2,5 y

Blanket: 5 y

HTS: 5 y

LiPb: 40 kton

Eurofer: 10 kton

316SS: 40 kton

Coil: 8 kton

Replacement

Scheme

Decay

storage

Sort &

Separate

Recycle

Del. 7: Material paths

Melting

Others

•Wet storage for 5 years, dust removal

•Interim Storage for 100 years

•Other strategies …

Dose rate levels?

Del. 7: Material paths

To do:

•Perform the exercise for Model AB

•Make material paths visible (scheme)

•Influence of recycling strategy on the material paths

•Identify R&D

MONITORING MEETING

Deliverable 2: Define the activity limits for the dismantling, melting, fabrication or reuse and waste.

Deliverable 7: Define the categories of materials based on the different paths in the material cycle of a fusion reactor.

Deliverable 8a: Define the R&D needs.

Del. 8: R&D

Separation

Recycling

Special bonding techniques

Remote processes

Melting, remote process

Other techniques, for “exotic materials” like W, SiC/SiC, WC, W-alloy

Influence of impurities

Del. 8: R&D

General issues

Fabrication

Remote process

Remote testing

Storage and reuse

Build up of activation products

Influence on material properties when using recycled material.

Influence of impurities.

Tritium removal, capture…

Secondary waste issue