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

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Table 26.2.3 of DOE/ET-0028 shows 7370 packaged PWR assemblies and 11,340 99,000 rail shipments. To this total must be added the 120,000 rail
packaged BWR assemblies needing shipment from ISFSF to a final repository shipments from ISFSFs to final repositories, also shown in this table, for
in the year 2000. In the reference case these assemblies would be shipped a total of 219,000 shipments for an all-rail scenario. For the reference
by rail in a modified NLI 10/24 cask which can accommodate only 7 packaged system, the total number of rail shipments is 89,000 + 120,000 = 209,000
PWR assemblies or 17 packaged BWR assemblies. (Normally this cask can shipments. Thus, the ratio of the number of rail shipments for an all
handle 10 PWR or 24 BWR assemblies.) For truck cask normally only 1 PWR rail shipping scenario to the number of rail shipments in the reference
and 2 BWR assemblies can be accommodated. Assuming a modified truck cask scenario is 219,000 - 209,000 = 1.05. Impacts presented in the GEIS for
can be developed that can accommodate 1 packaged PWR assembly or 1 packaged rail shipments should therefore be 1.05 times greater than impacts given
BWR assembly, the number of truck shipments, for the year 2000, from an in OOE/ET-0029.
ISFSF to a final repository would be 7370 + 11,340 = 18,710 truck shipments.
Table 4.1.1-3 of DOE/ET-0029 indicates a ratio of 120,000 to 1700 for the A comparison of some of the GEIS results with those presented in DOE/ET-0029
total number of shipments through the year 2050 compared to the number for indicates that the ratios developed in the above discussion are apparently
the year 2000. Applying this ratio to the 18,710 truck shipments results the values used in converting impacts from one document to another. For
in a total of about 1.3 x 10 6 truck shipments through the year 2050 for example, on page 4.1.15 of DOE/ET-0029, Table 4.1.2-3 gives a value of
movement of packaged spent fuel from an ISFSF to a final repository. To 3.1 x 102 man-rem for the dose to the population living along the transport
determine the total number of truck shipments, the number of truck shipments route, through the year 2050, for spent fuel truck shipments. Using the
from reactors to ISFSFs must be added to this value of 1.3 x 10 6 truck ratio derived in the above discussion, the impact presented in the GEIS,
shipments. Table 4.1.2-1 shows 8.9 x 10 4 truck shipments through the for an all truck shipping scenario, should be 25 times greater giving a
year 2050 for the reference system. Since this reference system is based value of 7.8 x 103 man-rem and indeed the result given in the GEIS is
on only 10% of the reactor shipments being transported by truck, a total 8 x 10 3 man-rem. There are some values, however, that do not agree after
of 8.9 x 10 5 truck shipments would occur if 100% of the shipments were this ratio is applied. Cases where there is a lack of agreement between
transported by truck. Thus the total number of truck shipments of all the two documents are outlined in a table which follows the discussion of
types through the year 2050 would be 1.3 x 10 6 + 8.9 x 10 5 = 2.2 x 10 6 truck rail shipments.
shipments. Impacts presented in the GEIS for 100% of all shipments by
truck should be (2.2 x 10 6 ) + (8.9 x 10 4 ) m 25 times greater than the impacts For rail shipments, it is more difficult to determine if results for the
given in DOE/ET-0029. reference system given in DOE/ET-0029 have been properly converted to an
all rail system which is used as the basis for impacts in the GEIS. The
A ratio can also be developed for rail shipments. The reference system difficulty arises because the two systems are so similar and only differ
has 100% of shipments from ISFSFs to the final repository being transported by the 10% of shipments from reactor to ISFSFs that are transported by
by rail and no conversion to a 100% rail system is needed here. For rail. It is difficult to determine if the ratio of 1.05 derived above has
shipments from reactors to ISFSFs, the reference system has 90% of all been used or whether a ratio of 1.11 has been used. The 1.11 ratio is
shipments transported by rail. Table 4.1.1-3 of DOE/ET-0029 shows 89,000 obtained from the fact that the reference system has 90% of shipments from
reactor shipments, through the year 2050, transported by rail. Since this reactors to ISFSFs transported by rail, and this may have been improperly
is 90% of all shipments, an all-rail shipment scenario would have about applied to the total system to include shipments from ISFSFs to final