rose at once from zero to four milliroentgens/hour (iir/hr).
It con-
tinued to rise until 1800 hours at which time it reached a peak of
10 mr/hr.
It then began to decline, and by 0800 on B plus 1, it was
down to four mr/hr.
During the entire period, the monitoring mission
was performed as planned,
CJTF SEVEN was notified when "fall-out"
began and as to its intensity.
It was.realized early|thatno evacua~
tion of ENIWETOK ISLAND would be necessary and this was confirmed
when CJTF SEVEN sent s message stating that he anticipated no evacuation for this shot.
The first radiological safety mission assigned
to CTc 7.2 had becn accomplished as far as BRAVO wes concerned.
Upon notification of the ROMEO date, the preliminary
steps taken before BRAVO were repeated.
Detachment radsafe officers
were briefed, film badges were issued, and couriers were instructed
on monitoring duties.
ceived and plotted,
On R minus 1 air and surface radexes were re~
In addition plans were made to muster TG 7.2
on the ocean side of ENIWETOK ISLAND.
poses.
This muster served two pur-
It served as a rehearsal for the type of muster to be per=
formed in the event of an evacuationy and it enabled the personnel .
of TG 7.2 to witness the explosion,
At H hour the ROMEO explosion was observed,
effects were noted as had been observed on BRaVO,
The same
However, the shock
_ wave passage on ROMEO shot consisted of two distinct blasts interspaced with fouw faint rumbles.
"Fall-out" was not detected until
1800 hours, and never rose above 2 mr/hr.
at 1500 hours, another "fell-out" began,
peak of 10 to 15 mr/hr.
However, on R plus 2,
This "fall-out" rose de) 2.
There were also local hot-spots on the
17
Was.
ar
13