silo 3 - U.S. Department of Energy

Total Dose
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Piiiject:
Calculation Number: 40430-CA-0003
PageNoa o f 3
The total project duration is 6 moths: 300 hours in Phase 1 and 700 hours in Phase 2.
The maximum total dose rates during Phase 1 and 2 due to particulates and mRn/progeny occur at a
location 994 m from Silo 3 in the north-easterly direction and are 0.16 mrem/yr.
The maximum total dose rate during Phase 1 and Phase 2 due to mRn/progeny occur at a location 332 m
from Silo3 in the north-easterly direction, and are 1.2 x lo4 mrem/yr and 2.0 x lo” mrem/yr, respectively.
Although the maximum dose rates occur at different locations. a conservative estimate of the maximum
dose rate for an offsite receptor due to Silo 3 stack emissions may be obtained by combining the dose
rates to obtain 0.17 mremlyr for Phase 1 and 0.17 mrem/yr for Phase 2. It should be noted that these
annual doses are based on 1 year (8760 hours) continuous release for each phase.
Since phase 1 operations are conservatively estimated to last 300 hours, the Phase 1 dose is 0.0058
mrem.
Since phase 2 operations are conservatively estimated to last 700 hours, the Phase 2 dose is 0.0139
mrem.
The total calculated potential public receptor dose estimate for both phases of Silo 3 operations is 0.02
mrem.
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