(a) General. (1) Symbols prescribed by this section shall use the
conventional radiation caution colors (magenta or purple on yellow
background). The symbol prescribed by this section is the conventional
three-bladed design:
Radiation Symbol
1. Cross-hatched area is to be magenta or purple.
2. Background is to be yellow.
[GRAPHIC] [TIFF OMITTED] TC21OC91.016
(2) In addition to the contents of signs and labels prescribed in
this section, employers may provide on or near such signs and labels any
additional information which may be appropriate in aiding individuals to
minimize exposure to radiation or to radioactive material.
(b) Radiation areas. Each radiation area shall be conspicuously
posted with a sign or signs bearing the radiation caution symbol and the
words:
Caution 2
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2 Or ``Danger''.
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Radiation Area
(c) High radiation area. (1) Each high radiation area shall be
conspicuously posted with a sign or signs bearing the radiation caution
symbol and the words:
Caution 2
High Radiation Area
(2) Each high radiation area shall 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 100 millirems in 1 hour
upon entry into the area or shall energize a conspicuous visible or
audible alarm signal in such a manner that the individual entering and
the employer or a supervisor of the activity are made aware of the
entry. In the case of a high radiation area established for a period of
30 days or less, such control device is not required.
(d) Airborne radioactivity area. (1) As used in the provisions of
this subpart, ``airborne radioactivity area'' means (i) any room,
enclosure, or operating area in which airborne radioactive materials,
composed wholly or partly of radioactive material, exist in
concentrations in excess of the amounts specified in column 1 of Table 1
of Appendix B to 10 CFR Part 20 or (ii) any room, enclosure, or
operating area in which airborne radioactive materials exist in
concentrations which, averaged over the number of hours in any week
during which individuals are in the area, exceed 25 percent of the
amounts specified in column 1 of the described Table 1.
(2) Each airborne radioactivity area shall be conspicuously posted
with a sign or signs bearing the radiation caution symbol and the words:
Caution 2
Airborne Radioactivity Area
(e) Additional requirements. (1) 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 10 times the quantity of such material specified in
Appendix C to 10 CFR Part 20 shall be conspiciously posted with a sign
or signs bearing the radiation caution symbol and the words:
Caution 2
Radioactive Materials
(2) Each area or room in which natural uranium or thorium is used or
stored in an amount exceeding 100 times the quantity specified in
Appendix C to 10 CFR Part 20 shall be conspicuously posted with a sign
or signs bearing the radiation caution symbol and the words:
Caution 2
Radioactive Materials
(f) Containers. (1) 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 to 10 CFR Part 20 shall bear a durable, clearly visible
label bearing the radiation caution symbol and the words:
Caution 2
Radioactive Materials
(2) Each container in which natural uranium or thorium is
transported, stored, or used in a quantity greater than 10 times the
quantity specified in Appendix C to 10 CFR Part 20 shall bear a durable,
clearly visible label bearing the radiation caution symbol and the
words:
Caution 2
Radioactive Materials
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2 Or ``Danger''.
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(3) Notwithstanding the provisions of paragraphs (f) (1) and (2) of
this section a label shall not be required:
(i) If the concentration of the material in the container does not
exceed that specified in column 2 of the described Table 1, or
(ii) For laboratory containers, such as beakers, flasks, and tests
tubes, used transiently in laboratory procedures, when the user is
present.
(4) Where containers are used for storage, the labels required in
this paragraph shall state also the quantities and kinds of radioactive
materials in the containers and the date of measurement of the
quantities.
