H'cdacsday, May 18, 1960
FEDERAL REGISTER
plies when the individual whole body
duses are known,
As an opcrational
technique, where the Individual whole
body doscs aie not known, a suitable
anampic of the exposed population should
be developed whose prolection Buide for
annual whoie body duse will be 0.17 rem
per capita per year. It is emphasized
that this is an oprrational technique
which should be modificd to meet speela] situations.
.
(2) Considerations of population re-
_ netics impose a per capita dose hmivation
for the gonads of 5 rems in 30 years.
The operational mechanism described
above for the annual individual whole
body dose of 0.5 retn js likely in the immediate future to assure that the gomnadal exposure Guide (5 rem in 30
years) is not excecded.
(3) These Guides do not differ substantially from certain other recori“mendations such as those made by the
National Committee on Radiation Protection and Measurements, the National
Academyof Sciences, anc the International
Commission
on
Radiological
Protection.
(4) The term “maximum permissible
on Radiation Protection (NCRP) and
the Intemational Commission on Radiologica! Protection (ICRP). However,
this term is often miusunderstond. The
words “maximum” and “permissible”
both have unfortunate connocations not
intended by either the NCRP or the
ICRP.
(5) There can be no single permissible
or acceptable level of exposure without
regard to the reason for permitting the
exposure, It should be general practice
to reduce exposure Lo rac:ation, and pasitive effort should be carried out to fulfill the sense of these recommendations.
It is basic that exposure to radiation
should result from 2 rea) dewrmination
of its necessity,
(6) There can be different. Radintion
Protection Guides with different numerical values, depending upon the circumstances.
The Guides herein recommended are appropriate for normal
peacetime operations.
(7) These Guides are not intended to
apply to radiation expesure resulting
fron natural backeround or the purposeful exposure of patients by practitioners of the healings arts.
(8) It §s recogniczed that our present
scientific knowledse does not pravide a
firm foundation within a factor ¢f two
or three for selcchon of any parucular
numeorica) value in preference to another
\ value, It should be recosnized that the
Radiation Protection Gindes reconmended in this paper are well below the
level where biolosical damage has been
observed in humans,
It is recommended that:
4. Current protection guides used by
the agencies be continued on an intern
basis for orsan doses to the population,
Recomnniendations are not nude coneerning the Radiation Protection Guides
“ ~—
(+
dose” is used by the Nationa] Committee
for individual orgnn doses to the popu-
Intion, other than the ponads. Unfortunately, Qhe complexities of establishing
fuldes applicable to radiation expoiure
of all body ornans preclude the Council
from making reeommendntions concern-
™
ing them at this time.
41
However, current
proteclion ruiucs used by the neencics
appear appropriate on an interim basis.
It is reconunended that:
5. The term “Radioactivity Concentration Guide” be adopted for Fuderal
use. This term ts defined as the concentration of radioactivity {n the environment which is determined to result in
whole body or orran doses cqua) to the
Radiation Protection Guide.
Within this definition, Radioactivity
Concentration Guides can be determined
aller the ladiavion Protection Guides
are decided upon. Anygiven Radioac-
tivity Concentration Guide is appbcable
only for the circumstances under which
the use of its correspondins Radiation
Protection Guide is appropriate.
Itis recommended that:
6. The Federal agencics, as an interim
measure, use radioactivity concentration
guides which are consistent with the recominended Radiation Protection Guides.
Where no Radiation Protection Guides
are provicced, Federal agencies cont:nue
Present practices.
No specific numerical recommendations for Radioactivity Concentration.
Guides are provided at this time. However, concentration guides now used by
the agencies appear appropriate on an
interim basis. Where appropriate radioactivity concentration fuices are not
available, and where Radiation Protection Guides for specific organs are provided herein, the latter Guides can be
used by the Federal! agcncies as a starting point for the derivation of radioactivity conceniration gundes applicable
to their pariicular probiems. The Federal Radiation Council has also initiated
action directed towards the development
of
additional
protection.
Guides
:
for
radiation
Ji is recommended that:
i. The Federal agencies apply these
Radiation Protection Guides with judgment and discretion, to assure th2t reasonable probability is achieved in the
attainment of the desired coz) of protecting man from the undesirable effects of
radiation. The Guides may be exceeded
only after the Federal agency having
jurisdiction over the matter has carefully
considered the reason for doing so in
light of the recommendations in this
paper.
The Radiation Protection Guides provide a general framework for the radiation
pratection
requircments.
It
is
expected that each Federal asency, by
viriue of its immediate knowlcdse of its
operating problems, wid use these Guides
o£ a basis upon which to develop detailed
Standards tailored to mect ifs particular
requirements, The Council will follow
the activili¢s of the Federal agencies in
this aren and will promote the necessary
coordination to achieve an effecuve
Federal pragrain,
‘
If the forezoing recommendations are
approved by you for the pruidance of
Federal agencies in the conduct of their
radiation protection activities, it ls further recomended that this memorandum be published in the Fepenan
Recister.
Aumior 5S. FLramina,
5011513
Chairman,
Federal ficcietion Council,
The recommendations numbercs ':
throurh
“7"
memorandum
contained
are
in
the
uappreves
or
2:°
Guidance of Federal agencies, anc *
memorandum shall be pubishea us...
FEDERAL REGISTER.
DwicnuT D. E1senrowrs
May 13, 1960.
[F-R. Doc. 60-4539: Filed, May 17, 157°
8:51 am.)