§
EVENT AND DESCRIPTION OF EXPOSED G@OUPA
seem es
ONS ret ee
1.2
carried out, ner was its operating condiven
known to be satsfactory under (he emerrency
Whole Body Gamma Doses
condition prevaiting at the time of une
Tus Fenwaven Vans a of external done given
in Table 1.1 were calculated from readings of
For
these reasons the later reading. ehich wove
higher than the early survey by an average of
eadistion Aichi siives mmrumenta” Averages
of a number of cone rate measurements on each
a) percent when corrected to the same times,
were uned in computing the desws luted. The
Mot ruments used for the later messurements
were calibrated just priog to the surveys.
idand at a given time were usei. The read.
ings were taken in air, approximately three
feet above ground, several days after the inhab-
ER RE. RRCn wT OnE De
36
~7+2-- OGM SOURCE SPEC TOU
mmm (OF IONTE PLANE ,5 me 08
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Fiatas 1.2—Diatribution of mherent cacrnes of yamema radiation from muted
fasion products, and hiatngram of degraded energica produced by Campton
scattering at lerel of infinite plane 3 fect in atr abore antformly-diatributed
flasiom products flefd.
tants were evacuated. Before this time, adequate surveys with well calibrated instruments
had not been possible, although readings had
been taken with a single survey meter at the
tine of evacuation. However, preliminary
calbration of this austrament diad not) been
eee
"Aries Muay cqufandens AN DPebe cf
1.21
Characteristics of the Gamma Radiation
The fallout material, when deposited on the
ground, formed a large planar source of radia:
tion, The energy distribution of the radiation
reaching an exposed imadividanal was infnencedl
by its passage through the intervening air, A
knowledge of the energy spectrum of the ra-