Ln egER
cme ant
peaks
,
gelma dose rate reading will represent equivalent contamination (depending
fe oe
on the gamma contribution from the body of the contaminated vehicle).
Another factor to be considered is that the probability of collecting fallout material on the teody from a generally contaminated area in
€n the other hand,
which one lives is creeier then from cne's automobile.
it has bcen noted in the past that significently higher amounts of contsiination have been found on the tires and under parts of fenders than on
the remainder of the car.
(Undoubtedly, this is a simple phenomenon of
picking up the activity from the highway.)
If one were to change a heavily
contaminated tire, sienificent emounts of radicactive material might
accumulate on the Eands, and later be transferred to the hair cr eyes by
a sinple rubbing of the hands over those parts.
|
A comparison might be made here between recommenced maxcimu« dose
rates found on personnel and the establishing of levels of activity for
. autonobiles,
There is one obvious difference, however;
in the first case
the nuierial is elreziy on the person whiie in the second case one has to
introduce the factor of rrobability of transfer ef contamination (end to
what derree) from the car to the body.
The dose rates {measured as stated) in graph IV would represent
ebout equal contamination per unit. area for a csr «s-for an infinite
.
.
Erie>
If the activity
were confined say principally to the tires and under parts of the fenders,
the dose rate readings might represent nearly twice the degree of contam-
dination.
One must weigh this condition with the probability that a tire
:
a
boar,
plane if the car were rather uniformly contaminated,
will be changed before the activity has decreased significantly.
A given dose rate reading inside a vehicle may represent less
contamination per unit area due to the contribution of gamma radiation
=
44
—_
Pica