Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 1000 - RADIATION HAZARDS › Subpart B - DEFINITIONS › Section 1000.201 - Definitions

Current through Register Vol. 48, No. 28, July 12, 2024
Except as stated in this Section, or unless a different
				  meaning of a word or term is clear from the context, the definition of words or
				  terms in this Part are the same as that applied to the same words or terms in
				  the Environmental Protection Act [415 ILCS 5 ]:
"Act" means the Environmental Protection Act [415 ILCS
				  5 ].
"Board" means the Illinois Pollution Control Board.
"Dose" means the quantity of radiation absorbed, per unit of
				  mass, by the body or by any portion of the body. Under this Part, a dose during
				  a period of time means the total quantity of radiation absorbed, per unit of
				  mass, by the body or by any portion of the body during such period of time. The
				  units of dose used in this Part are "Rad" and "Rem", as defined in this
				  Section.
"IEMA" means the Illinois Emergency Management Agency,
				  Division of Nuclear Safety.
"Individual" means any human being.
"Licensed activity" means any activity engaged in under a
				  general or specific license issued by the NRC.
"Licensed facility" means any facility constructed or
				  operated under a permit or a general or specific license issued by the
				  NRC.
"Licensed material" means any material received, possessed,
				  used, or transferred under a general or specific license issued by the
				  NRC.
"Licensee" means any person to whom a permit or a general or
				  specific license has been issued by the NRC.
"NRC" means the United States Nuclear Regulatory
				  Commission.
"Rad" means a measure of the dose of any radiation to body
				  tissues in terms of the energy absorbed per unit mass of the tissue. One rad is
				  the dose corresponding to the absorption of 100 ergs per gram of tissue. (One
				  millirad (mrad) = 0.001 rad).
"Radiation" means any or all of the following: alpha rays,
				  beta rays, gamma rays, X-rays, neutrons, high-speed electrons, high-speed
				  protons, and other atomic particles; but not sound or radio waves, or visible,
				  infrared, or ultraviolet light.
"Radioactive material" and "radioactive emissions" mean any
				  dusts, particulates, fumes, mists, vapors, or gases which spontaneously emit
				  ionizing radiation.
"Rem" means a measure of the dose of any ionizing radiation
				  to body tissue in terms of its estimated biological effect relative to a dose
				  received from an exposure to one roentgen of X-rays. (One millirem (mrem) =
				  0.001 rem). The relation of rem
				  to other dose units depends on the biological effect under consideration and
				  the condition of irradiation. For this Part, any of the following is considered
				  to be equivalent to a dose of one rem:
An exposure to one roentgen of X- or gamma radiation;
A dose of one rad due to X-, gamma, or beta radiation;
A dose of
				  0.1 rad due to neutrons or high
				  energy protons;
A dose of
				  0.05 rad due to particles
				  heavier than protons and with sufficient energy to reach the lens of the eye.
				  If it is more convenient to measure the neutron flux, or equivalent, than to
				  determine the neutron dose in rads, one rem of neutron radiation may be assumed
				  to be equivalent to 14 million neutrons per square centimeter incident upon the
				  body; or, if information is available to estimate with reasonable accuracy the
				  approximate distribution in the energy of neutrons, the incident number of
				  neutrons per square centimeter equivalent to one rem may be estimated from the
				  following table.
Neutron Flux Dose Equivalents
Neutron Energy (Mev)
No. of Neutron per square centimeter equivalent to a
							 dose of 1 rem (neutrons/cm2)
Average flux to deliver 100 millirem in 40 hours
							 (neutron/cm2 per second)
Thermal..........................
970 x 106
670
0.0001.............................
720 x 106
500
0.005...............................
820 x 106
570
0.02.................................
400 x 106
280
0.1...................................
120 x 106
80
0.5...................................
43 x 106
30
1.0...................................
26 x 106
18
2.5...................................
29 x 106
20
5.0...................................
26 x 106
18
7.5...................................
24 x 106
17
10.0.................................
24 x 106
17
10 to 30...........................
14 x 106
10
"Restricted area" means any area to which access is
				  controlled by the licensee to protect individuals from exposure to radiation
				  and radioactive materials. "Restricted area" must not include any areas used as
				  residential quarters, although a separate room or rooms in a residential
				  building may be set apart as a restricted area.
"Unrestricted area" means any area to which access is not
				  controlled by the licensee to protect individuals from exposure to radiation
				  and radioactive materials, and any area used for residential
				  quarters.