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

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165<br />

WASTE MANAGEMENT OPERATIONS<br />

accommodate only 7 packaged PWR assemblies or 17 packaged BWR assemblies. (Normally, this<br />

cask can handle 10 PWR or 24 BWR assemblies.) For truck cask normally only 1 PWR and 2 BWR<br />

assemblies can be accommodated. Assuming a modified truck cask can be developed that can<br />

accommodate 1 packaged PWR assembly or 1 packaged BWR assembly, the number <strong>of</strong> truck ship-<br />

ments, for the year 2000, from an ISFSF to a final repository would be 7,370 + 11,340 =<br />

18,710 truck shipments. Table 4.1.1-3 <strong>of</strong> DOE/ET-0029 indicates a ratio <strong>of</strong> 120,000 to 1,700<br />

for the total number <strong>of</strong> shipments through the year 2050 compared to the number for the<br />

year 2000. Applying this ratio to the 18,710 truck shipments results in a total <strong>of</strong> about<br />

1.3 x 106 truck shipments through the year 2050 for movement <strong>of</strong> packaged spent fuel from<br />

and ISFSF to a final repository. To determine that total number <strong>of</strong> truck shipments, the<br />

number <strong>of</strong> truck from reactors to ISFSFs must be added to this value <strong>of</strong> 1.3 x 106 truck<br />

shipments.<br />

Table 4.1.2-1 shows 8.9 x 104 truck shipments through the year 2050 for the reference<br />

system. Since this reference system is based on only 10% <strong>of</strong> the reactor shipments being<br />

transported by truck, a total <strong>of</strong> 8.9 x 105 truck shipments would occur if 100% <strong>of</strong> the ship-<br />

ments were transported by truck. Thus, the total number <strong>of</strong> truck shipments <strong>of</strong> all types<br />

through the year 2050 would be 1.3 x 106 + 8.9 105 = 2.2 x 106 truck shipments. Impacts<br />

presented in the GEIS for 100% <strong>of</strong> all shipments by truck should be (2.2 x 106) - (8.9 x 104)<br />

or 25 times greater than the impacts given in DOE/ET-0029.<br />

A ratio can also be developed for rail shipments. The reference system has 100% <strong>of</strong><br />

shipments from ISFSFs to the final repository being transported by rail and no conversion<br />

to a 100% rail system is needed here. For shipments from reactors to ISFSFs, the reference<br />

system has 90% <strong>of</strong> all shipments transported by rail. Table 4.1.1-3 <strong>of</strong> DOE/ET-0029 shows<br />

89,000 reactor shipments, through the year 2050, transported by rail. Since this is 90% <strong>of</strong><br />

all shipments transported by rail, an all rail shipment scenario would have about<br />

12,000 rail shipments. To this total must be added the 12,000 rail shipments from ISFSFs<br />

to final repositories, also shown in this table, for a total <strong>of</strong> 219,000 shipments for an<br />

all-rail scenario. For the reference system, the total number <strong>of</strong> rail shipments is<br />

89,000 + 120,000 = 209,000 shipments. Thus, the ratio <strong>of</strong> the number <strong>of</strong> rail shipments for<br />

an all-rail shipping scenario to the number <strong>of</strong> rail shipments in the reference scenario is<br />

219,000 to 209,000 = 1.05. Impacts presented in the GEIS for rail shipments should there-<br />

fore be 1.05 times greater than impacts given in DOE/ET-0029.<br />

A comparison <strong>of</strong> some <strong>of</strong> the GEIS results with those presented in DOE/ET-0029 indicates<br />

that the ratios developed in the above discussion are apparently the values used in con-<br />

verting impacts from one document to another. For example, on page 4.1.15 <strong>of</strong> DOE/ET-0029,<br />

Table 4.1.2-3 gives a value <strong>of</strong> 3.1 x 10 2 man-rem for the dose to the population living<br />

along the transport route, through the year 2050, for spent fuel truck shipments. Using<br />

the ratio derived in the above discussion, the impact presented in the GEIS, for an all-<br />

truck shipping scenario, should be 25 times greater giving a value <strong>of</strong> 7.8 x 103 man-rem

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