SLIDE 8
Estimates of airborne activity concentrations.
Air activity concentration at
Rongelap and Sifo,fsland yene tabulated from the meteorology results provided
by Peterson for
and
(Pe81).
Also,
results for air activity
concentrations of 1oly and l 3y were estimated from the Bikini Ash composition
and tabulated for comparison. Details on this method are given by Lessard
(Le84b).
The cumlated activity agree somewhat, however the instantaneous
airborne activity concentrations do not agree well.
In summary, the Peterson
approach towards estimating dose to the exposed Marshallese requires further
refinement in order to achieve correspondence with all available information
regarding external exposure and exposure rate.
AIR ACTIVITY CONCENTRATIONS
AT RONGELAP
Time Post
Detonation,
Hours
5
7
10
14
17
Bq M °
1981, Peterson
———
ay
Tay
7.4
250
15,000
714
ll
1984, Lessard
——_
1ST]
137
250
7,400
110,000
3,700
1,100
19
110,000
25,000
330
250
0
0
1,500
13
0
0