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

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184<br />

WASTE MANAGEMENT OPERATIONS<br />

standards for the repository licensing procedures well in advance <strong>of</strong> the construcion <strong>of</strong> the<br />

first repository.<br />

Draft pp. A.17, 32, 46, 58<br />

Issue<br />

One commenter was unable to reconcile the statements <strong>of</strong> inventory <strong>of</strong> plutonium-239 in<br />

Table A.14, 29, and 42 with those in Table A.53. (6)<br />

Response<br />

Using a half life for 23 9 Pu <strong>of</strong> 2.44 x 104 years, one gets 16.29 grams/curie <strong>of</strong> 23 9 Pu.<br />

Multiplying this value times the curies <strong>of</strong> 23 9 Pu shown in Table A.14, A.29, and A.38, in the<br />

year 2050 (presuming the commenter intended Table A.38 rather than A.42) one gets 1790,<br />

1840, and 27 metric tons <strong>of</strong> 23 9 Pu respectively. The first two numbers agree with the values<br />

in Table A.53 while the third value indicates a typographical error. It was reproduced in<br />

Table A.53 as 17 rather than 27.<br />

Draft p. K.5<br />

Issue<br />

It is stated that 25-year retrievability required lower thermal densities. For salt<br />

andt shale the decrease is a factor <strong>of</strong> two while for granite and basalt it is 2.5. Why?<br />

(208-NRC'))<br />

Response<br />

The discrepancy was due to rounding error. The change is approximately a factor <strong>of</strong> 2<br />

in all cases. The reason for the reduced loading (i.e. reduced stresses) was described on<br />

the same page.<br />

Draft p. K.5<br />

Issue<br />

Optimization <strong>of</strong> the design for a given waste type in a particular medium would likely<br />

result in a different capacity estimates. (208-NRC)<br />

Response<br />

DOE agrees that this would be the case. See response to issue in this section refer-<br />

ring to p. 3.1.116.

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