(a) As used in this
section:
"Ionizing radiation" means alpha and beta particles,
electrons, protons, neutrons, gamma and X-ray, and all other radiations which
produce ionizations directly or indirectly, but does not include
electromagnetic radiations other than gamma and X-rays.
"Self-luminous compound" means any mixture of phosphorescent
material and radium, mesothorium, or other radioactive element.
"Workroom" includes the entire area bounded by walls of solid
material and extending from floor to ceiling.
(b) The following occupations involving
exposure to radioactive substances and to ionizing radiation are declared
hazardous for minors under eighteen years of age:
(1) Any work in any workroom in which:
(A) Radium is stored or used in the
manufacture of self-luminous compound;
(B) Self-luminous compound is made,
processed, or packaged;
(C)
Self-luminous compound is stored, used, or worked upon;
(D) Incandescent mantles are made from fabric
and solutions containing thorium salts, or are processed or packaged;
and
(E) Other radioactive
substances are present in the air in average concentrations exceeding ten per
cent of the maximum permissible concentrations in the air recommended for
occupational exposure by the National Committee on Radiation Protection, as set
forth in the forty-hour week column on table one of the U.S. Department of
Commerce, National Bureau of Standards Handbook No. 69 entitled "Maximum
Permissible Body Burdens and Maximum Permissible Concentrations of
Radionuclides in Air and in Water for Occupational Exposure", issued June 5,
1959; and
(2) Any other
work which involves exposure to ionizing radiations in excess of the limits set
for minors under eighteen years of age by the occupational safety and health
standards of the department.
