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

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5.78<br />

The population dose from a meteorite breach <strong>of</strong> a single repository in the year <strong>of</strong> clos-<br />

ure would range from 3.8 x 107 to 1.8 x 10 8 man-rem. ( a) About 3.8 x 103 to 1.4 x 105 health<br />

effects(b) might be expected from this event. For a breach in the year <strong>of</strong> closure, the<br />

dose to the regional population is about 1 to 10 times the dose received from naturally<br />

occurring sources.<br />

As shown in Table 5.5.4, the dose for the second and subsequent generations (70 years<br />

per generation) <strong>of</strong> residents in the regional population is substantially smaller than that<br />

for the first generation. The range <strong>of</strong> doses for the second generation (from 1.1 x 103 to<br />

2.8 x 103 man-rem) may be compared to the dose from naturally occurring sources over the<br />

same 70-yr period <strong>of</strong> 1.4 x 107 man-rem.<br />

TABLE 5.5.4. 70-Year Cumulative Whole-Body Dose to First Five Generations( a )<br />

<strong>of</strong> Regional Population--Repository Breach by Meteorite, man-rem<br />

Spent Fuel Repository Salt Granite Shale Basalt<br />

Generation<br />

1 .6.9 x 107 1.8 x 10 8 9.1 x 107 1.8 x 108<br />

2 1.1 x 103 2.8 x 103 1.4 x 103 2.8 x 103<br />

3 2.1 x 10 2 5.5 x 10 2 2.7 x 10 2 5.5 x 102<br />

4 6.3 x 101 - not calculated<br />

5 1.3 x 101 - not calculated<br />

Reprocessing <strong>Waste</strong> Repository<br />

Generation<br />

1 6.0 x 107 5.1 x 107 3.6 x 10 7 6.0 x 107<br />

2 1.2 x 103 1.1 x 103 7.5 x 10 2 1.2 x 103<br />

3 2.4 x 10 2 2.1 x 10 2 1.5 x 10 2 2.4 x 102<br />

4 5.5 x 101 - not calculated<br />

5 1.2 x 101 - not calculated<br />

(a) A generation is taken here to mean 70 years. At the end <strong>of</strong> that time the population<br />

is replaced by an identical population that lives for 70 years.<br />

Within the reference environment (midwest), 150 persons reside within 3.2 km <strong>of</strong> the<br />

repository center, the point <strong>of</strong> meteor impact. All <strong>of</strong> these people are presumed to be<br />

killed by the blast and thermal effects. A similar meteorite impacting in the metropolitan<br />

area <strong>of</strong> city G in the reference environment (50 to 80 km away) would result in about<br />

25,000 immediate fatalities within a 3.2 km radius. No thought is apparently given by the<br />

public to the potential for societal loss from meteorites striking urban areas. Similarly<br />

little concern should be had for meteorites striking a waste repository, particularly since<br />

calculated consequences are somewhat less for the meteorite case.<br />

(a) Normalizing the 70-yr whole-body dose commitment from breach <strong>of</strong> a repository by meteorite<br />

to the electrical energy produced yields 5.5 x 10 4 man-rem/GWe-yr for the oncethrough<br />

fuel cycle and 3.6 x 104 man-rem/GWe-yr for the reprocessing cycle.<br />

(b) Using the range <strong>of</strong> 100 to 800 health effects per million man-rem conversion factor<br />

between dose and effect. See Appendix E for details.

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