| (40) Dose equivalent (HT )--The
product of the absorbed dose in tissue, quality factor, and all other
necessary modifying factors at the location of interest. The units
of dose equivalent are the sievert (Sv) and rem.
(41) Dose limits--The permissible upper bounds of radiation
doses established in accordance with this chapter. For purposes of
this chapter, "limits" is an equivalent term.
(42) Effective dose equivalent (HE )--The
sum of the products of the dose equivalent to each organ or tissue
(HT ) and the weighting factor (WT ) applicable to each of the body organs or
tissues that are irradiated (HE = ΣWT HT ).
(43) Embryo/fetus--The developing human organism from
conception until the time of birth.
(44) Entrance or access point--Any opening through
which an individual or extremity of an individual could gain access
to radiation areas or to licensed sources of radiation. This includes
portals of sufficient size to permit human access, irrespective of
their intended use.
(45) Escorted access--Accompaniment while in a security
zone by an approved individual who maintains continuous direct visual
surveillance at all times over an individual who is not approved for
unescorted access.
(46) Exposure--The quotient of dQ by dm where "dQ"
is the absolute value of the total charge of the ions of one sign
produced in air when all the electrons (negatrons and positrons) liberated
by photons in a volume element of air having mass "dm" are completely
stopped in air. The SI unit of exposure is the coulomb per kilogram
(C/kg). The roentgen is the special unit of exposure. For purposes
of this chapter, this term is used as a noun.
(47) Exposure rate--The exposure per unit of time.
(48) External dose--That portion of the dose equivalent
received from any source of radiation outside the body.
(49) Extremity--Hand, elbow, arm below the elbow, foot,
knee, and leg below the knee. The arm above the elbow and the leg
above the knee are considered part of the whole body.
(50) Fingerprint orders--The orders issued by the NRC
or the legally binding requirements issued by agreement states that
require fingerprints and criminal history records checks for individuals
with unescorted access to category 1 and category 2 quantities of
radioactive material or safeguards information-modified handling.
(51) Generally applicable environmental radiation standards--Standards
issued by the EPA under the authority of the Atomic Energy Act of
1954, as amended, that impose limits on radiation exposures or levels,
or concentrations or quantities of radioactive material, in the general
environment outside the boundaries of locations under the control
of persons possessing or using radioactive material.
(52) Gray (Gy)--The SI unit of absorbed dose. One gray
is equal to an absorbed dose of 1 joule per kilogram (J/kg) or 100
rad.
(53) High radiation area--An area, accessible to individuals,
in which radiation levels from sources of radiation external to the
body could result in an individual receiving a dose equivalent in
excess of 0.1 rem (1 millisievert (mSv)) in one hour at 30 cm from
any source of radiation or from any surface that the radiation penetrates.
(54) Human use--The internal or external administration
of radiation or radioactive material to human beings for healing arts
purposes or research and/or development specifically authorized by
the agency.
(55) Individual--Any human being.
(56) Individual monitoring--The assessment of:
(A) dose equivalent to an individual by the use of
individual monitoring devices; or
(B) committed effective dose equivalent to an individual
by bioassay or by determination of the time-weighted air concentrations
to which an individual has been exposed, that is, DAC-hours. (See
the definition for DAC-hours in §289.202(c) of this title); or
(C) dose equivalent to an individual by the use of
survey data.
(57) Individual monitoring devices--Devices designed
to be worn by a single individual for the assessment of dose equivalent.
For purposes of this chapter, "personnel dosimeter" and "dosimeter"
are equivalent terms. Examples of individual monitoring devices include,
but are not limited to, film badges, thermoluminescence dosimeters
(TLDs), optically stimulated luminescence dosimeters (OSLs), pocket
ionization chambers (pocket dosimeters), electronic personal dosimeters,
and personal air sampling devices.
(58) Inspection--An official examination and/or observation
including, but not limited to, records, tests, surveys, and monitoring
to determine compliance with the Act and rules, orders, requirements,
and conditions of the agency.
(59) Internal dose--That portion of the dose equivalent
received from radioactive material taken into the body.
(60) Ionizing radiation--Any electromagnetic or particulate
radiation capable of producing ions, directly or indirectly, in its
passage through matter. Ionizing radiation includes gamma rays and
x rays, alpha and beta particles, high-speed electrons, neutrons,
and other nuclear particles.
(61) Land disposal facility--The land, buildings, and
equipment that are intended to be used for the disposal of low-level
radioactive waste (LLRW) into the subsurface of the land.
(62) Lens dose equivalent--The external dose equivalent
to the lens of the eye at a tissue depth of 0.3 cm (300 mg/cm2 ).
(63) License--A form of permission given by the agency
to an applicant who has met the requirements for licensing set out
in the Act and this chapter.
(64) Licensed material--Radioactive material received,
possessed, used, or transferred under a general or specific license
issued by the agency.
(65) Licensee--Any person who is licensed by the agency
in accordance with the Act and this chapter.
(66) Licensing state--Any state with rules equivalent
to the Suggested State Regulations for Control of Radiation relating
to, and having an effective program for, the regulatory control of
naturally occurring or accelerator-produced radioactive material (NARM)
and has been designated as such by the Conference of Radiation Control
Program Directors, Inc. For the purposes of evaluation and/or distribution
of sealed sources, this includes Licensing State Status: Product Review
Only.
(67) Local law enforcement agency (LLEA)--A public
or private organization that has been approved by a federal, state,
or local government to carry firearms and make arrests, and is authorized
and has the capability to provide an armed response in the jurisdiction
where the licensed category 1 or category 2 quantity of radioactive
material is used, stored, or transported.
(68) Lost or missing radioactive material--Radioactive
material whose location is unknown. This definition includes licensed
material that has been shipped but has not reached its planned destination
and whose location cannot be readily traced in the transportation
system.
(69) Low-level radioactive waste (LLRW)--Radioactive
material that meets the following criteria:
(A) LLRW is radioactive material that is:
(i) discarded or unwanted and is not exempt by rule
adopted under the Texas Radiation Control Act (Act), HSC, §401.106;
(ii) waste, as that term is defined in Title 10, CFR, §61.2;
and
(iii) subject to:
(I) concentration limits established in Title 10, CFR, §61.55,
or compatible rules adopted by the agency or the Texas Commission
on Environmental Quality (TCEQ), as applicable; and
(II) disposal criteria established in Title 10, CFR,
or established by the agency or TCEQ, as applicable.
(B) LLRW does not include:
(i) high-level radioactive waste as defined by Title
10, CFR, §60.2;
(ii) spent nuclear fuel as defined by Title 10, CFR, §72.3;
(iii) byproduct material defined in the Act, HSC, §401.003(3)(B);
(iv) naturally occurring radioactive material (NORM)
waste that is not oil and gas NORM waste;
(v) oil and gas NORM waste; or
(vi) transuranics greater than 100 nanocuries per gram.
(70) Manufacture--To fabricate or mechanically produce.
(71) Member of the public--Any individual, except when
that individual is receiving an occupational dose.
(72) Minor--An individual less than 18 years of age.
Cont'd... |
