Management of Commercially Generated Radioactive Waste - U.S. ...

6.80
processed and disposed of, and during years 41 through 49, when only HLW would be dis-
posed of.
The estimated yearly operating costs for the subseabed disposal concepts are presented in
Table 6.1.16.
Operating costs associated with the reference subseabed disposal concept but also common
to other disposal concepts are assumed to be similar. These costs would include trans-
portation, AFR facilities (for the spent fuel), P/E facilities, and geologic repository
facilities (assumed for the reference concept).
Decommissioning Costs
Decommissioning costs particularly associated with subseabed waste disposal operations
would probably be limited to the seaport, interim storage facility, the port facility, and
the disposal ships. The monitoring ship is not expected to be affected by radioactive waste
during its 40 years of operation. Any decommissioning costs associated with the monitoring
ship are assumed to be offset by its salvage value, which results in a zero net decommissioning
cost.
The decommissioning cost of an AFR facility is used as the basis for the decommissioning
cost of the seaport interim storage facility (Bechtel 1979b). These costs, based on 10 per-
cent of capital cost excluding owner's cost, are approximately $23 million for the spent fuel
disposal and approximately $18 million for the HLW disposal case.
The decommissioning costs for the port facility and two disposal ships are the same for
both waste forms and are estimated to be about $2 million and $29 million, respectively, as-
suming 10 percent of capital cost less owner's costs.
Costs for decommissioning other facilities associated with subseabed disposal and common
to other waste disposal alternatives are assumed to be similar. These facilities include AFR
facilities (for the spent fuel), P/E facilities, and geologic repository facilities. These
TABLE 6.1.16. Estimated Operating Costs
Estimated Cost, $ million/yr
Facility Spent Fuel Disposal HLW Disposal
Seaport Interim Storage Facility
Years 1-9 --- 3.4
Years 10-40 6.2 4.9
Years 41-49 6.2 3.4
Port Facility 1.5 1.5
Disposal and Monitoring Ships
Years 1-9 --- 14.5
Years 10-40 20.9 20.9
Years 41-49 20.9 14.3