Small Nuclear Power Plants, Volume 3: A General and Economic Assessment Page: 53
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Humboldt Bay--or downward from Dresden--hence a slightly higher contingency
percentage (5.5%) was used.
Because the 50 and 100 MWe OCMR's represent considerable extrapolations from
the 11.4 MWe Piqua Nuclear Power Facility, higher contingency percentages were
applied: respectively 8.5% and 10%.
A 10% contingency percentage was used for the PWR-CNSG also since it represents
a land based extrapolation of a shipboard reactor.
Working Capital (Excluding Fuel Cycle)
The estimated working capital required for plant operation and maintenance (but
excluding the fuel cycle) was computed as the sum of:
1. 2.7% of the sum of the annual fuel cost and the annual operating and
maintenance costs. (Line 12, Table 17).
2. The average value of materials and supplies in inventory, other than nuclear
fuel. This value is assumed to equal 25% of the sum of operating and main-
tenance supplies (Line 5, Table 17) and chemicals and resins (Line 6,
Table 17).
The foregoing method yielded a working capital that appears somewhat low for
small electric systems. It can be justified on the basis that legal and other
expenses incurred prior to a bond issue for the new plant would be paid out of
a general fund.
Summary of Capital Costs
Based on the foregoing capital cost components, Tables 5 through 7 were prepared
showing the total capital investment required for each of the five plants. The
six cost items comprising the "Total Direct Construction Costs" are those given
in greater detail in Table 2. When the costs for the Architect-Engineer services
are added to the Direct Construction Costs, the resultant total is referred to
as "Total Before Owner's Costs." When the owner's costs, contingency, land and
land rights (Account No. 320), and working capital are added to the "Total Before
Owner's Costs" the resultant sum is the "Total Capital Cost" required for the
plant, excluding the capital cost (working capital) for the fuel cycle.
Fuel Cycle Costs
1. General
Toll enrichment of privately-owned uranium in government-owned gaseous
diffusion plants becomes available in 1969, with private ownership becoming
mandatory in 1971. Thus, for a nuclear power plant which would achieve
commercial operation in 1970, private ownership of the fuel was assumed to
apply throughout the plant's lifetime. Under private fuel ownership, the
fuel cycle cost elements are:
a. Purchase of uranium ore concentrate.
b. Conversion of ore concentrate to uranium hexafluoride.
c. Toll enrichment of the uranium.53
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Kaiser Engineers. Small Nuclear Power Plants, Volume 3: A General and Economic Assessment, report, March 1967; Oak Ridge, Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc100944/m1/65/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.