monitoring meeting efda technology workprogramme 2005 activities 2005-2006 field: safety and...
TRANSCRIPT
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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
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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.
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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
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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
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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
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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.
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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
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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
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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.
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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
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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
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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
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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?
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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
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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.
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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
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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