-20-
HW-80991
Table VI shows the removal of several radionuclides by the water
treatment at Pasco and Richland.
These data include the radioactive decay
of the short-lived radionuclides during travel through the water treatment
plant.
.
TABLE VI
DEPLETION OF RADIONUCLIDES FROM COLUMBIA RIVER WATER
BY TREATMENT AT THE RICHLAND AND PASCO WATER PLANTS - 1963
Radionuclide
Pasco
RE+Y
90
Cu®4
80
Na?*
60
p32
As'®
zn®°
Np??9
% Depletion
Richland
80
40
80
80
50
40
60
80
15
- 30
cr?!
-
20
.
The calculated annual average dose to the GI tract, total body and the
percentage MPRI for bone from sustained consumption of sanitary water at
the three cities is presented in Table VII.
TABLE VII
CALCULATED ANNUAL DOSE FOR SELECTED ORGANS
FROM ROUTINE INGESTION OF SANITARY WATER* - 1963
Total Body
GiTract
l
25
mrem
Richland**
Pasco
Kennewick
12.5
<1
mrem
20
“5
Bone
% MPRI
0.8.
Thyroid
(Small Child, 1 1/day)
mrem
22
0.9
40
<0.5
“20
* Here and elsewhere in this report where a dose from an ingested nuclide
is expressed in mrem units, the determination is made from parameters
used by the ICRP tc translate dose rates into Maximum Permissible Concentrations for drinking water. In most cases the estimated annualintakes of individual radionuclides were multiplied by conversion factors
derived from the ICRP parameters and published by Vennart, et al. (8)
... The "standard man''(4) beverage intake of 1.2 liters per day was used
in this calculation.
This is a departure from the 2.2 liters per day
(total liquid intake for the standard man’ including foods) used for similar calculations in the past, but more reasonably represents the average
exposure from drinking water alone.
**
The radiation dose shown in this table for Richland residents was ail
accrued during the last 4 months of 1963 subsequent to the change from
wells to Columbia River water.