Se
Ven A
vc] 7h
J. Since the radioactivity will decay at
high initial
rate, it is possible that vital civil defense opprations may be
undertaken even within the first few days witho
exposure of personnel.
used in relays.
This is especially true
Serious overEf they can be
They should, of course, be carefully monitored
when thus exposed.
Vv.
Recommendations with Respect
radiation hazard,
to Residual
The guidance provided herein
information currently available.
js based on
Improved knowlddge of phenomena,
cover or shelter, and other factors will require
these policies from time to time,
In each insta
will have to be made between evacuation, shelter
tion of the two.
Warning time, distance to a reIAtively safe area
and the existence of reception facilities will bal
tions,
for some combina-
prime considera-
The possibility of moving into the fallout. area from
another target must be also considered in making
decision.
Because larger areas will be involved, tha
problems of
communication, warning and transportation become
creasingly
complex,
Since operating decisions may of necessiity be made on the
basis of a large area analysis, they become increBRsingly impcertant.
Methods used by meteorologists for plott
wind vectors
can be applied to the prediction of fallout pattefPns.
FCDA Advisory
Bulletin No, 178, tssued in November 1954, contaifhs a method
suggested by the U.S. Weather Bureau.
These methpbds will permit a
rough but useful approximation of the probable difPection of falio.*
and give some indication as to the area of contampnation.
Improve‘
and faster methods of deriving this pattern and mpans of testing
their reliability for civil defense purposes are
-ll-
SECRETScis
der study.
DOE ARCHIVES
2