(28) Within the range of the Maximurn
Permissiie Doses (see paragraph 57) specified .
for occupational cxposure, when it is assumed
that thece is no threshold
ud that effects arc:
linearly relatect to dose, it is justifiable to con-
sider the average dose to the whole organ or
tissue,elthough it is recognized that when more;
Iii.
is available, it will be
_ information
more
rnean dosefor cells of any.
(70) In the ease of nonciamagecaous disag runriate to use the
done when the broaalready
is
as
type,
2" given
esttcle of the fase bauivel
by daughter products irradiated
is
evucosa
chial
‘lols.
Sl. of radon and thoron. The use of the racan dose :
% has practical advanteges in that the significant ;
kines. determined anerciy by the
en
wee
ce
Berne
Meet,
ah
ase
meee
Ut
Ye
itt
LEER ‘ESOS ere
ae :
rename
the this
prinolism omit await fiihor oar at volume can be.ta%en - that
Inoffact,
Flew Tir the we en ee tissue under consideration. used already In:
ciple has necessarily ‘been
calculating maximunl permissible burdens oF :
WEL radionnelictes In tissues. FTowever, wily Cxieers ©
exampic, wile
Woinhemocencity of dose (for
:
aweh
ane
=
~
>
—
evidcace
SeeETERS
to show whether, with oo ches
mn na
= eteborg op
eRe
"
*
~
.
on
: beeen orbs
reantineee
Dies
Osteticnion oP thar
*
en.e in the decree.
7
anew! on
irom thethe sacivi
of
Bradis
iroim
c
lic resulis
action
”
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‘
leven
eee
:
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a
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rs
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.
a
rimeiewil OF ie socceic
7
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petivites suction meocediure giv
‘\ ASE Th.
—_
~
>
i
Lien
ee
1
Crore
a o Moron "phis is @ maticr upon which furiier work Is
'
d cht c
sud
or redon
sin,
preducts, the relev
aud cavchte
addon
. Also, for external exposure*, of the skin,
i r products, the relevent needed
t
se. Fauivetea
*
«ane
1
selates we]
Faquivaicat is that in the bronchial:
1S.
.
-
-
Dose
.
an achtelh fs 4
ered to be
mucosa. which i the tusue consid
*
yey
oe
;
of the
ted. Flere the waehat
most heavily irradia
inad
le lune would b
abstituie
can madcaqua
_
£
eho
ae ge quate substitute
Ce
Us
Sr that of the irradiated tissuc.
.
Vespeciany when thc distance to tue source
very
is very
I exposed arcix Is
1
short or when
the
every: short
peacee
nio averag
ta
. be approp
Hote
;
riate
not
would
i:
tsmall,
i
it is
.
7
:
| bihe duse over the entire
, it
Tusicad
skin.
recommended that the dose be avcraged over
an area of a square centimetre in the region |
s-reeeiviag the highest dose; however, with very :
=
:
°
.
-
.
‘narrow beams of extremely hich intensity, such ©
as those used for X-ray analysis, the value of :
such en average dose may be misleading, and protection measures have to be based on °
FO
qualitative considerations.
,
.
;
wi
ICRP Publication 9
Recommendations of the
International Committee
on Radiological Protection
.
(adopted September 17, 1965) -