(a)
(1)
Radiation symbol
(A) The symbol shall use the conventional
radiation caution colors (magenta or purple on yellow background). The symbol
is the conventional three bladed design.
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Cross hatched area shall be magenta or purple.
Background shall be yellow.
The boundaries of the three blades of the propeller-like symbol
shall be confined within a 60° sector of the circle delineated by their outer
edges and said blades shall be synmetrically distributed 60° apart. The radius
(R) of the central circle of the symbol shall be the standard for its other
dimensions as follows: Overall radius of symbol =5 R; shortest distance from
circumference of central circle to inner edge of nearest blade =R/2.
(B) In addition to contents of
signs and labels, any additional information which may be appropriate in aiding
individuals to minimize exposure to radiation or to radioactive materials may
be provided on or near such signs and labels.
(2)
Radiation areas
(A) Each radiation area shall be
conspicuously posted with a sign or signs bearing the radiation caution symbol
and the words
CAUTION1
RADIATION AREA
This provision shall not apply to areas or rooms where x-ray
equipment is used solely for diagnostic purposes by or under the direction of a
healing arts practitioner as authorized by law.
(3)
High radiation areas
(A) Each high radiation area shall be
conspicuously posted with a sign or signs bearing the radiation caution symbol
and the words
CAUTION1
HIGH RADIATION AREA
This provision shall not apply to areas or rooms where x-ray
equipment is used solely for diagnostic purposes by or under the direction of a
healing arts practitioner as authorized by law.
(B) The department may require each high
radiation area to be equipped with a control device which shall either cause
the level of radiation to be reduced below that at which an individual might
receive a dose of one hundred millirem in one hour upon entry into the area, or
which shall energize a conspicuous, visible or audible alarm system in such a
manner that the individuals entering are made aware of the entry. This
provision shall not apply to mobile sources.
(4)
Airborne radioactivity area
(A) As used in sections
19-24-1 to
19-24-14,
inclusive, Airborne Radioactivity Area means any room, enclosure or area in
which airborne radioactive materials exist in concentrations in excess of the
amounts specified in Appendix B, Table 1, Column 1, 10 CFR 20 or any room,
enclosure or area in which airborne radioactive material exists in
concentrations which averaged over the number of hours in any week during which
individuals are in the area exceed twenty-five per cent of the amounts
specified in Appendix B, Table 1, Column 1, 10 CFR 20.
(B) Each airborne radioactivity area shall be
conspicuously posted with a sign or signs bearing the radiation caution symbol
and the words
CAUTION1
AIRBORNE RADIOACTIVITY AREA
(5)
Additional requirements
(A) Each area or room in which radioactive
material is used or stored and which contains any radioactive material (other
than natural uranium or thorium) in any amount exceeding ten times the quantity
of such material specified in Appendix C, 10 CFR 20 shall be conspicuously
posted with a sign or signs bearing the radiation caution symbol and the
words
CAUTION1
RADIOACTIVE MATERIAL(S)
(B) Each area or room in which natural
uranium or thorium is used or stored in an amount exceeding one hundred times
the quantity specified in Appendix C, 10 CFR 20 shall be conspicuously posted
with a sign or signs bearing the radiation caution symbol, and the
words
CAUTION1
RADIOACTIVE MATERIAL(S)
(C) Each area or room in which sources of
ionizing radiation other than radioactive materials are used shall be
conspicuously posted with a sign or signs bearing the radiation caution symbol
and appropriate wording to designate the nature of the source or sources of
ionizing radiation (example below)
CAUTION1
X-RAY
(6)
Containers(A) Each container in
which is transported, stored, or used a quantity of any radioactive material
(other than natural uranium or thorium) greater than the quantity of such
material specified in Appendix C, 10 CFR 20 shall bear a durable, visible label
bearing the radiation symbol and the words
CAUTION1
RADIOACTIVE MATERIAL
(B) Each container in which natural uranium
or thorium is transported, stored or used in a quantity greater than ten times
the quantity specified in Appendix C, 10 CFR 20 shall bear a durable, clearly
visible label bearing the radiation caution symbol and the words
CAUTION1
RADIOACTIVE MATERIAL
(C) A label shall not be required if the
concentration of the material in the container does not exceed that specified
in Appendix B, Table 1, Column 2, 10 CFR 20.
(D) When containers are used for storage, the
labels required shall state also the quantities and kinds of radioactive
materials in the containers and the date of measurement of the quantities.
(b)
(1) A room or area is not required to be
posted with a caution sign because of the presence of a sealed source if the
radiation level twelve inches from the surface of the source container or
housing does not exceed five millirem per hour.
(2) Rooms or other areas in hospitals are not
required to be posted with caution signs because of the presence of patients
containing radioactive material, if there are personnel in attendance who shall
take the precautions necessary to prevent the exposure of any individual to
radiation or radioactive material in excess of the limits established in
subsections (a), (b), (c) and (d) of section
19-24-5.
(3) Caution signs are not required to be
posted at areas or rooms containing radioactive materials for periods of less
than eight hours if the materials are constantly attended during such periods
by an individual who shall take the precautions necessary to prevent the
exposure of any individual to radiation or radioactive materials in excess of
the limits established in subsections (a), (b), (c) and (d) of section
19-24-5.
1 The word "danger" may be substituted for the word
"caution" in the signs and labels prescribed by this
section.