Models Selected for Calculation of Doses, Health Effects and Economic Costs Due to Accidental Radionuclide Releases From Nuclear Power Plants Page: 23 of 198

                                
The contribution to ingestion dose from liquid pathways is independent of
wind direction. However, it is dependent on time of year because contamination
via irrigation will occur only during the crop growing season. The liquid con-
centration is also a function of time of year because of seasonal or monthly
variations of water dispersion parameters. The water concentration can be cal-
culated for each uptake point for each month of the year prior to performing
the dose calculations for each start time. The appropriate concentration array
will then be available and will not need to be calculated for each start time.
The general organization of calculations is shown in the logic diagrams
of Figures 1.3-1, 1.3-2 and 1.3-3. These diagrams reflect the methods sug-
gested above for reduction of computing efforts.
READ INPUT DATA
INI TI ALI ZE PARAMETERS
DETERMINE START TIMES
IN ORDER
DO FOR EACH ACCIDENT  ----------------
CALCULATE SOURCE TERMS
DIRECT, WATER AND
AIR PATHWAYS
CALCULATE DIRECT DOSE  I
DIRECT   YES   VS DI STANCE AND DIRECTION
I RADIATION  "'  DETERMINE MINIMUM
I               REMEDIAL ACTIONS
WRITE DATA TO FILE
ENDACCIDENTLOOP  ------------------
FIGURE 1,3-2
WRITE REPORTS FOR
TOTAL HEALTH EFFECTS
AND ECONDM4C COSTS
DO ANOTHER CASE
OR END
FIGURE 1.3-1. Calculation Logic - Part I

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