New Nuclear Policy-Planning Council Costings for Direct Disposal of Spent Nuclear Fuel
New Nuclear Policy-Planning Council
Costings for Direct Disposal of Spent Nuclear Fuel
Table 2b is for cases where the canisters are buried horizontally. These cases were not used in the costing of the four scenarios.
Table 3: Area of Disposal Site and Cost of Disposal
Table 5: Unit Cost of Management and Disposal
Table 6: Results of Calculation of Cost of Fuel Cycle
(Note 1: Due to rounding to the first decimal place, in some places the totals (subtotals) in these tables don’t add up.
Note 2: In this calculation of the cost of disposal of spent fuel, several uncertainties are not taken into account. It is therefore appropriate to assume that the actual range of uncertainty in costs is greater than that shown in these calculations.)
Diagram 1: costs arising year by year for burial in hard rock
Diagram 2: costs arising year by year for burial in soft rock
Table 1: Major Parameters
|
Total quantity disposed of
|
32,000 tons
|
|
800 (tons/year for 40 years)
|
|
|
Average burn-up of spent fuel
|
45,000 MWd/t
|
|
Disposal container
|
19cm thick carbon steel
|
|
Number of spent fuel assemblies per container
|
4 assemblies or 2 assemblies
(based on PWR) |
|
Disposal depth
|
soft rock 500m (with supports)
|
|
hard rock 1000m (without supports)
|
|
|
Bentonite thickness
|
70 cm
|
|
Disposal container surface temperature
|
less than or equal to 900C
|
|
Ground surface temperature
|
150C
|
|
Rate of ground temperature increase
|
+30C/100m
|
Table 2a: Case by Case Calculation of Cost of (Vertical) Disposal of Spent Fuel (figures in billion yen)
|
Cost Headings |
Soft Rock |
Hard Rock |
|||
|
Case 1 |
Case 2 |
Case 3 |
Case 1 |
Case 2 |
|
|
2 fuel assemblies per canister, buried vertically |
4 fuel assemblies per canister, buried vertically |
2 fuel assemblies per canister, buried vertically at 2 sites |
2 fuel assemblies per canister, buried vertically |
2 fuel assemblies per canister, buried vertically at 2 sites |
|
| Technological Development |
214.3 |
214.3 |
214.3 |
213.8 |
213.8 |
| Survey and Site Acquisition |
240.3 |
224.7 |
284.8 |
247.9 |
299.3 |
| Design and Construction |
3,499.1 |
2,500.8 |
4,054.6 |
1,556.2 |
2,192 |
| Above Ground FacilitiesBelow Ground Facilities
Above Ground Equipment Below Ground Equipment Other |
134.9 2,730.3 453.3 137.8 42.9 |
111.1 1,813.1 417.7 116.1 42.9 |
156.5 2,983.8 623.2 212.8 78.4 |
99.8 589.6 504.3 319.6 42.9 |
118.9 668.1 728.1 598.4 78.4 |
| Operations |
1,966.7 |
1,486.2 |
2,247.2 |
1,803.7 |
2,257.9 |
| Closing and Dismantling |
215.6 |
243 |
365.4 |
241.2 |
360 |
| Monitoring |
119 |
119 |
237.9 |
119 |
237.9 |
| Project Management |
1,176.2 |
979.9 |
1,653.4 |
919.4 |
1,469.7 |
| Consumption Tax |
333.1 |
257.9 |
405 |
227.6 |
312.8 |
| Subtotal |
7,800.4 |
6,025.9 |
9,462.8 |
5,328.7 |
7,343.5 |
| Tax for handling of spent fuel materials etc. |
761.6 |
761.6 |
761.6 |
761.6 |
761.6 |
| Total |
8,562 |
6,787.5 |
10,224.4 |
6,090.3 |
8,101.1 |
Table 2b: Supplementary Case by Case Calculation of Cost of (Horizontal) Disposal of Spent Fuel (figures in billion yen)
|
Cost Headings |
Soft Rock |
Hard Rock |
|
|
Supplementary Case 1 |
Supplementary Case 2 |
Supplementary Case 1 |
|
|
2 fuel assemblies per canister, buried horizontally |
4 fuel assemblies per canister, buried horizontally |
2 fuel assemblies per canister, buried horizontally |
|
| Technological Development |
214.3 |
214.3 |
213.8 |
| Survey and Site Acquisition |
199.6 |
224 |
244.6 |
| Design and Construction |
1,114.9 |
1,041.8 |
1,148.3 |
| Above Ground FacilitiesBelow Ground Facilities
Above Ground Equipment Below Ground Equipment Other |
74.9 325.9 435.8 235.4 42.9 |
73.3 320.9 407.1 197.6 42.9 |
73.8 120.7 486.3 424.6 42.9 |
| Operations |
1,385.8 |
1,150.5 |
1,555.9 |
| Closing and Dismantling |
201.7 |
203.8 |
219.3 |
| Monitoring |
119 |
119 |
119 |
| Project Management |
672.9 |
715.8 |
848.7 |
| Consumption Tax |
180.3 |
166.2 |
193.6 |
| Subtotal |
4,088.6 |
3,835.4 |
4,543 |
| Tax for handling of spent fuel materials etc. |
761.6 |
761.6 |
761.6 |
| Total |
4,850.2 |
4,597 |
5,304.6 |
Table 3: Area of Disposal Site and Cost of Disposal
| Area and Cost Headings |
Soft Rock
|
Hard Rock
|
|
2 fuel assemblies per canister,
buried vertically (2 sites) |
2 fuel assemblies per canister,
buried vertically |
|
| Area of disposal site (km2) |
18.8
|
11.5
|
| Total length of main shafts (km) |
88
|
43
|
| Total length of disposal shafts (km) |
290
|
216
|
| Total cost (billion yen) |
9,462.8
|
5,328.7
|
| Cost with 2% discount rate (billion yen) |
7,507.5
|
4,226.8
|
| Unit cost with 2% discount rate (million yen/ton) |
336
|
189
|
Table 4: Disposal Schedule
| Time of commencing disposal |
35 years after establishment of implementing organization
|
| Time of completing disposal |
100 years after commencing disposal
|
| Period for monitoring after completion |
300 years after closing disposal site
|
Table 5: Unit Cost of Management and Disposal (2% discount rate)
Total period of operation (units: million yen/ton)
| Cost Headings |
Reprocessing Case
|
Direct Disposal Case
|
| Transport of spent fuel to reprocessing plant |
18
|
–
|
| Reprocessing |
253
|
–
|
| Transport of spent fuel to interim storage facility |
16
|
16
|
| Interim storage |
54
|
54
|
| Storage of high level waste (HLW) |
24
|
–
|
| Transport of HLW |
3
|
–
|
| (Disposal of HLW) or direct disposal of spent fuel |
(0.12 yen/kWh)
|
189 – 336
|
| Management and storage of TRU waste |
25
|
–
|
| Diposal of TRU waste (by deep geological disposal) |
29
|
–
|
| Diposal of TRU waste (by means other than deep geological disposal) |
10
|
–
|
| Fabrication of MOX fuel |
259
|
–
|
| Decommissioning of reprocessing plant |
27
|
–
|
Table 6: Results of Calculation of Cost of Fuel Cycle (yen/kWh)
| Cost Headings | Scenario 1 | Scenario 2 | Scenario 3 | Scenario 4 | |
| Front End | Uranium fuel |
0.57
|
0.57
|
0.61
|
0.61
|
| MOX fuel |
0.07
|
0.05
|
–
|
0.00
|
|
| Back End | Reprocessing |
0.63
|
0.42
|
–
|
0.16
|
| HLW storage, transport and disposal |
0.16
|
0.10
|
–
|
0.06
|
|
| TRU waste management, storage and disposal |
0.11
|
0.07
|
–
|
0.03
|
|
| Intermediate storage of spent fuel |
0.04
|
0.06
|
0.14
|
0.13
|
|
| Direct disposal of spent fuel |
–
|
0.12 – 0.21
|
0.19 – 0.32
|
0.09 – 0.16
|
|
| Total |
1.60
|
1.4 – 1.5
|
0.9 – 1.1
|
1.1 – 1.2
|
|
| Electricity generation cost |
5.20
|
5.0 – 5.1
|
4.5 – 4.7
|
4.7 – 4.8
|
|
Diagram 1: costs arising year by year for burial in hard rock
Diagram 2: costs arising year by year for burial in soft rock
Previously published costs of the back end of the nuclear fuel cycle
