n
APH:sow
Srewhtaty ,
gs
wi
ponded to 3.5 r/hr fall-out at H+2 br,
Use
Because of small particle size this fall-out was much more diffi. eee
cult to decontaminate than the macroscopic particles o
4
we
Secondary fall-out levelled off between O700 - O800M, R+2.
Maximum levels were 20_to 45 mr/hr,
Lagoon contamination covered
levels
oe
a)
=
eastern quarter of the lagoon wit,
ae
comparable to those aa Lagoon flushing through the
southwest passage materially imtfeased background radiation levela in
the vicinity of Ourukaen, Bokoaetokutoku, and Bokororyuru.
2
3
3
>. mumps)
2
-
A partial Rad-Safe survey was conducted on
with incomplete atoll results. “Results of this surv
Day
=
id inditate
=
that Bokobyaadaa, Namu, Eniirikku, Bikini, and the Yurochi-Aomoen.
chain were materially contaminated. Reentry and recovery were accomplished to a large degree on shot day. No secondary fall-out was
detected as results of this shot.
Lagoon contamination was restricted to a V-shaped pattern with
apex at Eninman and tips covering the Bokobyaadea-Aomoen area. A
reading of 100 mr/hr was obtained over the Eninman anchorage at H+4
hr. Enyu anchorage was clear of contamination while Bikini anchorage
showed tracpm
of contamination at H+ hr.
+
Th
saibioiles «..:-. was materially different from that ~-
in that radiation levels within the crater were dependent on "shine"
from the lip of the crater and surrounding "sand dunes."
wih alellUa
Ve
"yet
the Bikini-Enyu sequence of islands.
No material secondary fall-out
was encountered at Bikini as a result of this detonation.
re
iit
ort
[eres
AsareBla orag byA bsa
Raed
hy
eagee OE PEPES
ets,
mt
val
ike
cass,
koe
Wye
t inNN LT Ie \Fly
tn
MEA
\
i
A demage and radiation survey was conducted on
Day. This survey covered the eastern and northern islands of the
atoll and was conclusive enough to limit reent
Bikini, and
Airukiiji on the first day. The survey on
day indicated that recontamination was limited to the Yurochi-Aomoen and
ment.
Lagoon water was materially contaminated with radioactive sediReadings of 4.2 r/hr were obtained at an altitude of 500 ft
116
Copled/DOE
LANL, J-Dly,
me
mr/pr, and Bairoko - 30 mr/hr,
Ainsworth - 8 mr/hr, Estes ~- 12
ac
Pa
mt!
dual topside levels on ships were:
Res4-
7
iG
“Fy
: