Wednesday, May 18, 1960
plies when the individual whole body
doses are known. As an opcrational
technique, where the individual whole
body doscs arc not known, a suitable
sample of the exposed population should
be developed whose protection guide for
annual whole body dose will be 0.17 rem
per capita per year. It is emphasized
that this is an oprrationa) technique
which should be modified to meet spe-
elu) situations.
Oo
(2) Considerations of population re. Netics impose a pcr capita dose limitation
for the gonads of 5 rems in 30 years.
The operational) mechanism described
above for the annual individua)] whole
body dose of 0.5 rem is likely in the immediate future to assure that the gomadal exposure Guide (5 rem in 30
years) is not exceeded.
(3) These Guides do not differ substantially from certain other recoramendations such as those made by the
National Committee on Radiation Protection and Measurements, the National
Academy of Sciences, and the International Commission on Radiological
Protection.
(4) The term “maximum permissible
dose” is used by the National Committee
on Radiation Protection (NCRP) and
the International Commission on Raiological Protection (ICRP). However,
this term is often misunderstood. The
words “maximum” and “permissible”
both have unfortunate connotations not
intended by either the NCRP or the
ICRP.
(5) There can be no single permissible
or acceptable leve) of exposure without
regard to the reason for permitting the
exposure. It should be general practice
bo yeduce Exposure to radiation, and positive effort should be carried oui to fulfill the sense of these recommendations.
It is basic that exposure io radiation
whould result from a real determinztion
of its necessity.
(6) There can be different Radiation
Protection Guides with different numerical values, depending upon the circumstances. The Guides herein recommended sre appropriate for normal
peacetime operations.
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FEDERAL REGISTER
(7) These Guides are not intended to
apply to radiation exposure resulting
from natura) backrround or the purposeful exposure of patients by practitioners of the healing arts.
(8) It is recogni:cd that our present
scientific knowledge does not provide a
firm foundation within a factor of two
or three for selection of any particular
nuuncrical value in preference to another
value, It should be recovnized that the
Radiation Protection Guides recommended in this paper are well below the
level where biolorical damage has been
observed in humins,
It ts recommended that:
4. Current protection guides used by
the agencics be continucd on an interim
basis for orzan doses to the population.
Reeommendations are not made conerrning the Radiation Protection Guides
for individual organ doses to the popuJation, other than the ronads. Unfortunately, the complexities of establishing
Fuides applicable to radiation expasure
Of all body oreans preclude the Connell
grom making recommendations concern-
ing them at this time. However, eurrent
protection puides used by the agencies
appcar appropriate on an interim basis.
It is recommended that:
5. The term “Radioactivity Concentration Guide” be adopicd for Federal
use. This term is defincd as the concentration of radioactivity in the environment which is determined to result in
whole body or orran doses equal to the
Radiation Protection Guide.
Within this definition, Radioactivity
The recommendations numbered “!
throurh °7" contained in the at:
memorandum are approved for %.
Guidance of Federal agenees, anc 1
Memorandum shall be pubished in uu.
FEDERAL REGISTER.
—
Dwicuy D. Exsennowrn
Mar 13, 1960.
(PR. Doc. 00-4539: Piled, May 17,
8:61 am]
Concentration Guides can be determined
after the Radiation Protection Guides
are decided upon. Any given Radoactivity Concentration Guide is appbcable
only for the circumstances under which
the use of its corresponding Radiation
Protection Guide is appropriate.
It is recommended that:
6. The Federal agencies. as an interim
measure, use radioactivity concentration
guides which are consistent with the recommended Radiation Protection Guides.
Where no Radiation Protection Guides
are proviced, Federal agencies continue
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 radio-
activity concentration guides are not
avzilable, end where Radiation Protection Guides for specific organs are provided herein, the latter Guices can be
used by the Federal agencies as a starting point for the derivation of radioactivity concentration guides applicable
to their particular probiems. The Federa) Radiation Council has also initiated
action directed towards the development
Of additional Guides for radiation
protection.
.
- 3" 2s recommended that:
7. The Federal agencies apply these
Radiation Protection Guides with judsment and discretion, to assure that rea-
sonable probability is achieved in the
attainment of the desired goal of protect-
ing man from the undesirable effects of
radiation. The Guides may be exceeded
only after the Federal agency having
jurisdiction over the matter has carefully
eonsidered the reason for doing so in
lisht of the recommendations in this
paper.
The Radintion Protection Guides pro-
vide a general frameworkfor the radiation protection requirements.
It is
expected that each Federal agency, by
virtue of its immediate knowledce of its
operating problems, will use these Guides
os o basis upon which to develop detailed
standards tailored to mect ifs particular
requirements. The Council will follow
the activities of the Federal agencies in
this aren and wil] promote the necessary
coordination to achieve an effective
Federa) program,
Tf the foregoing recommendations are
approved by you for the ruidance of
Federal nagencics in the conduct of their
radiation protection activitics, it is further recommended that this memoran-
dum be published in the Ferprenau
REGISTER.
Aantmitr S. Preamine,
Chairman,
Fedcral Radiation Council,
wee tee re ee
19°: