silo 3 - U.S. Department of Energy

Revislon History:
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E N 0 I N E E R I N G@
I
Revision 1 - All I RevisedAdded
Revision 2 - All Revised/Added
+- 5069
Calculation Number: 40430-CA-0003
PageNod o f2
000211
Description of Revlslon
Revised discharge rates for both
particulates and radon. Revised stack
height and flow rates. Calculate doses
at particular receptor locations
corresponding to monitoring stations, as
well as the calculation of the maximum
doseflocation of occurrence
Change particulate source term from 1
mg/cubic meter to one based on dust
concentrations constrained to 10% of
the DAC for Th-230. Other changes
include the consideration of the initial
headspace venting of Silo 3 as a
separate event, including Rn-219 and
Rn-220, as well as Rn-222 in the radon
calculations, and assuming the
maximum exposed member of the
public receives 100% of the exposure
while outdoors.
Changed density of waste from 42.2
Ibs/ft3-to 50 ibs/ft3, and radon emanation
factor from 0.18 to 0.35. Process
removal rate changed from 10 cyhr to 6
cyhr.
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