were taken to provide 705, body burden estimates and an independent estimate of
"cs body burdens.
Cesi um body burdens calculated from urine bioassay data
are used for comparison with the whole body counting estimates as an additional
parameter of our quality control program.
6004 was tarely detected in the urine
thus a similar comparison is not possible for this radionuclide.
The mathemati-
cal technique used for determination of the body burden can be derived frem a
previous publication (Le79).
Figures 1 through 4 show relative results between comparisons of paired
urine bloassay results, and whole body counting data collected from the Rongelap
and Utirik population in 1977 (Co77) and the Bikini population in 1974 (Co75),
1978 and 1979 (Mi79).
Figures | through 3 nave samples plotted randomly; figure
4 has the samples plotted in the same sequence as the urine was analyzed.
The
results show excellent agreement between the two body burden evaluation
techniques.
The standard deviation plotted on figures 1 through 4 ceflect the
fluctuation in the individual's daily urine activity concentration used to
calculate the 13705 body burden.
METHOD
The National Council on Radiation Protection and Measurements in Report 52
(NCRP77) and the International Cammission om Radiation Protection report of committee IV publicacion 10 (ICRP68) suggest that
137
Cs has a biological long tern
compartment with a removal rate constant which is on the order of
6x 1079 at.
ICRP publication 10 suggests that there may be long term biolog-
ical retention of 606, (ICRP68), and studies performed on humans report that the
retention function for 6000 can be described by multiple compartments with biological mean residence times that range between .37 days and 880 days