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

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7.13<br />

7.3.1 Repository Inventory Accumulations<br />

The total amount <strong>of</strong> spent fuel to be disposed <strong>of</strong> or reprocessed for each <strong>of</strong> the five<br />

growth assumptions is shown in Table 7.3.1. The relative quantities <strong>of</strong> spent fuel here are<br />

approximately the amount that would result from the quantities <strong>of</strong> generated energy shown in<br />

Table 7.1.1. The proportional relationship is not exact, however, because only in Cases 2<br />

and 3 do all reactor plants complete their full normal-life cycles.<br />

TABLE 7.3.1. Total Spent Fuel Disposal or Reprocessing Requirements<br />

Case Nuclear Power Growth Assumption Spent Fuel Discharged, MTHM<br />

1 Present Inventory Only 10,000<br />

2 Present Capacity and Normal Life 48,000<br />

3 250 GWe System by Year 2000 and<br />

Normal Life 239,000<br />

4 250 GWe System by Year 2000 and<br />

Steady State 316,000<br />

5 500 GWe System by Year 2040 427,000<br />

Only the once-through cycle is considered for the first two (low-growth) cases. The<br />

accumulation <strong>of</strong> spent fuel in the final repositories for these two cases is plotted in Fig-<br />

ure 7.3.1 for each <strong>of</strong> the three repository startup dates. The region between the first two<br />

curves represents the range <strong>of</strong> inventory accumulations possible for the proposed program<br />

while the region between the second and third curve represents the range <strong>of</strong> inventory<br />

accumulations for the alternative program.<br />

The repository inventory accumulation for Case 3 using the once-through cycle is shown<br />

in Figure 7.3.2. With the reprocessing cycle, however, the repository inventory accumula-<br />

tion is a function <strong>of</strong> both the reprocessing throughput and the repository startup and<br />

50 --- CASE 2<br />

--<br />

REQUIREMENTS<br />

40<br />

W 30<br />

0<br />

S10<br />

20t<br />

PROPOSED ALTERNATIVE<br />

PROGRAM PROGRAM<br />

REGION REGION<br />

1990 REPOSITORY 2010 REPOSITORY 2030 REPOSITORY<br />

_ STARTUP STARTUP STARTUP<br />

0 I -- I I -<br />

1990 2000 2010 2020 2030 2040 2050 2060<br />

YEAR<br />

CASE 1<br />

REQUIREMENTS<br />

FIGURE 7.3.1. Repository Inventory Accumulations for Cases 1 and 2.

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