e.
For planning purposes it was assumed that some indication of
the development of adverse conditions would be apparent from observed winds
immedtately posteshet and that cloud traeicing should confirm the situation
by about H plus 2 to H plus § hours.
Assuming an averago wind of 15 to 20
knots, the ENINETOK garrison could be given a firm evacuation decision apprad
mately four to seven hours prior to the arrival of contaminatien,
Warnings,
had they been necessary, could haye been issued appreciably further in advance
In addition to the above, an Eniwetok evacuation plan was placed in effect {cr
BIXINI shots, with personel on alert status until H plus 24 hours.
The
evacuation plan was designed on an austere basis to be accomplished rclatively
quickly with the minimum of personal equipment and aircraft and shipsoard
space.
Levels of contamination requiring evacuction were not specifically sct
down inasmuch as each case would have to be considered on its own merits and
demerits, and would depend upon the stage of completion ef the oper:tion,
sites and yields of remaining events, and the average level of scquired
personnel dosages. In general, the levels which could be tolerated without
evacuntion would be higher for shots Late in the operation than they would be
for the first. shots.
As a general rule, somethin: on the order of two to thre
tincs the established Wwe of 3.9r fer the rensining period ef the operation
was considered acceptable without resorting to the complexity, cxpense and
disruption of anavacustion.
6. Lagoon Contamination:
A considerable amount of study was pliccd
on the problem of contamination of the shot atoll lagoon and the attendent
difficulties ef surface eperations as a result,
is presented in Tab F,
ae
The outcome of these studies
Sricfly the studies indicated the follewing:
Both ENIWETOK and BIKINI Lagsons have "belt drive” current