.
Sera ee ae
SRT ead Oe.
These are shown in Tab B, Appendix III."
All parts of the TAKUYO continued to be washed and rinsed each
morning until reaching Rabaul at 0900 hours JST, 19 July.
Decontamination of the TAKUYO personnel was also commenced on 15
July on advice from Tokyo,
Men were directed to shampoo and shower, and
the clothing of the crew was washed and monitored.
On arrival at Rabaul,
each crew member was given a haircut.
The SATUMA did not encounter rain (position 151° East and approxieee
mately West of the TAKUYO) and the officers routinely monitored their
radiation level using their geiger counter and dosimeter.
By this means
they felt assured that the SATUMA had not encountered fallout radiation
and was not contaminated.
No decontamination measures were instigate™
ca——_.
On arrival in Rabaul, the ship was monitored, using the TAKUYO scintilla~
tion counter, and the Captain advised us that all readings were at background levels.
Monitoring was done on 18, 20, 21 and 25 July.
Swires
were also taken on the SATUMA using ordinary checmical filter paper with
an area of 4.9 square centimeters and swiping a 100 square centimeter
areas
The swipes were ashed and counted, using the geiger counter.
The monitoring and swipe results are given in Tab B, Appendix IV,
D.
RADIOLOGICAL SURVEY OF SHIPS
Two Beckman MK-5 (Serial Nos. 1146 and 65014) geiger counters an
one Chatham CDV-700 (Model 3, #6306) geiger counter were used to establish background radiation readings in Rabaul.
These instruments were
calibrated the day prior to departure for Rabaul by Task Group 7.1 md
Task Group 7.5 Rad-Safety organizations.
brations were confirmed,
On return to Eniwetok the cali-
A background dose-rate reading, taken at 2200
7 RSa
CONFIDENTIAL
DOE ARCIVES
29