a {Reprinted from the Federal Register of September 26, 1961, as corrected}
exposure with respect to the RPG. For
this purpose, the total) dally intake of
such materials, averaged over periods of
the order of a year, constitutes an appropriate criterion.
The control of the intake by members
of the general population of radioactive
materials from the environment can appropriately involve many different kinds
ef actions. The character and import of
these actions may vary widely, from those
which entail littl interference with
Tt is recommended that:
Taps D—Onaper Scars oF Agron
Ranges of transent
Fale of daily iniake
3. (a) The following guidance on daily
fntake be adopted for normal] peacetime
Oraded seule af ection
Range J.__........| Perindie
«confirmatory
‘velllance as Decemary.
ae
Range [1....| Quantitive surveilisnce ond
Tanz W—Rawees of Taansreoet Rares of Ivtare
{wrRnoersocumes Pea Dat} von Usr m Gaacgy
Bcate Of ACTIONS Bowwakren in Tante ll.
foutine reptro|.
Range T1......{ Evsiustion and epplication ef
edditiona! con
} CASTS a
usual activities, such as monitoring and
surveillance, to those which involve u
major disruption, such as condemnation
of food supplies. Some contro) actions
may require prolonged lead times before
Recommendations on Fta-226, F-131,
rae
1 ee “iets
.
'
+ mt a ea a es
*
A ee tee ee ee eae ee ee yen em oe
ee ee verde
went now. does nat in many Instances
provide adequate guidance for taking
developments.
that insofar as possible contro! actions
contained in Recommendation 2, above.
Routine contro) of useful applications of
-eadvance.
It is recommended that:
2. The radiological health activities of
Federal agencies in connection with environmental, contamination with rewo-
active materials be based, within the
Henits of the agency's statutory respon-
sibilities, on a graded series of eppropri-
ate actions related to ranges of tntake of
. Fadjoactive materials by exposed popu-
. ation groups.
In order to provide ru.dance tn
_@eencies In adapting the giidec
proach to their own programs,
_ recommendations pertaining to
the
apte
the
_ Specific radionuclides in this memoran@am consider three transient daily rates.
Ranre I
Redium-72......
7
Svoentium-O_..
mn
Rasge DD
-2D
e-10
Stroniiur-h,....]
3-100
O20
3-200
1 Me2.000]
Raver Ill x0
He}, Ou
FHe2.00
LO wa
specific consideration to the effects on
man of rates of tntake of radium-226,
Vip the case of fodine 171, the sulishle sample would
fodine-131, strontium-90 and strontium. | foclude
only amal| children. For adults. the KPG for
te thyroid would po. be excerded by vaten of iptuke
839 resulting in radiation doses equa) to
Bitherby
a sector of 30 than those applicebie to amal)
those specified in the appropriate RPG's.
ib) Federal] agencies determine con-
The use of a single numerical) intake of these radionuclides to Lhe environment
value, which in part has been the practice
and has given consideration to future
"to meet contingencies be known in
Redionoctides
Sodine331'......
Sr-90, and Sr-89. The Counci) bas given
becoming effective. eg., major changes
in processing facilities or water supplies.
The magnitude of control measures
should be related to the degree of likeli- | The Council has also reviewed past and
bood that the RPG maybe exceeded. current activities resulting in the release
actions appropriate to the risk involved,
For planning purposes, it ts desirable
operations to be applied to the averace
of suitable samples of am exposed population group:
‘
centrations of these radjonuclides in au,
water, or items of food applicable to
their particular programs which are con-
For each of the nuclides
sistent
three ranges of transient daily intake are
given which correspond to the guidance
with
the
guidance
contained
herein on average daily intake for the
Tadionuclides radium-22€, jodine-131,
strontium-80, and strontium-8&8. Some
of the genera! considerations involved in
the derivation of concentration values
radiation and atomic energy should be
such that eapected average exposures of
suitable samples of an exposed popula-
from intek«:values are given in Staff Retion grosn will mot exceed the upper port No. 2.
.
value of Range O. For jodine-131 and
It js recommended that:
°
radium-22., this value corresponds to.
4. For radionuclides not considered in
she RPG for the average of a suitable this report, agencies use concentration
sample of an exposed population group.
values tn air, water, or items of food
which are consistent with recommended
In the cases of strontium-90 and strontlum-B9, the Council's study indicated
‘that there is currently no known operaonal requirement for an intake value
&: high gt the one corresponding the
'aerG. Heuwe. a value estimated to correspond to coses to the critica] organ not
greater than one-third of the RPG has
been used.
Radiation Protection Guides and the
geners) guidance on intake.
In the future, the Council will direct
attention to the development of appro-
priate radiation protection guidance fcr
‘
those radionuclides for which such consideration appears appropriate or neces.
sary. In particular, the Counci! will
study any radionuclides for which use-
The guidance recommended below is fu) applications of radiation or atomic
"of intake by suitable samples of exposed
population groups. For the other redio- given in terms of transient rates of energy require rejease to the environment
muciides, the agencies can use the some | (radioactivity) intake tn micromicrocu- of significant amounts of these nuclides.
-genera] approach, the details-of which - ries per day, The upper limit of Range Federe) agencies are urged to inform
are considered tn Staff Report No. 2.
T is based on an annual RPG (or lower, the Council of such situations.
The general types of action, appropriate
In case of radioactive strontium) consid.
Aszanam Risicorr,
-when these transient rates of intake fol! ered as ati acceptable risk for a Lifetime.
* Chairman,
into the different ranges are also dis- However, it is necessary to use averages
Federal Radiation Council.
cussed in Btafl Report No. 2.
The pur-
pose of these actions is to provide reason- eble assurance that average rates of
’ Intake by a suitable samp! | anerv---g
. population group. ave... _
over periods much shorter than a lifetime for both radiation dose rates and
rates of. intake for administrative end
Terulatorv nurposes. It ts recommended
tas Buch --eriods should be of the order
of the order of one year, do not exceed
the upper value of Range II. The general character of these actions is sug-
listed tn the tebles are much smaller
than any single intake from which an
Individual might be expected to sustain
sample and averaged ove: perio’-<
gested in the following table.
. ote
ofone year.
It ts to be noted that values
The recommendations numbered “1”
through “4” contained in the «above
memorandum are approved for the guid-
ance of Federai agencies, and the memo-
randum shall be published in the Fero-
ERAL REGISTER. |
-
Jorn F. Erennepy.
SEPTEMBER 2P7 1961.
*
DOE ARCHIVES
JO0FubY
ree
eee eee
—w roe
Oe;
-
wee ee