Louisiana Administrative Code › Title 33 - ENVIRONMENTAL QUALITY › Part XV - Radiation Protection › Chapter 4 - Standards for Protection against Radiation › Subchapter A - General Provisions › Section XV-403 - Definitions

Current through Register Vol. 50, No. 6, June 20, 2024
A. As used in this
				  Chapter, the following definitions apply.
Air-Purifying Respirator
-a respirator
					 with an air-purifying filter, cartridge, or canister that removes specific air
					 contaminants by passing ambient air through the air-purifying element.
Annual Limit on Intake (ALI)
- the derived
					 limit for the amount of radioactive material taken into the body of an adult
					 worker by inhalation or ingestion in a year. ALI is the smaller value of intake
					 of a given radionuclide in a year by the reference man that would result in a
					 committed effective dose equivalent of 0.05 Sv (5 rem) or a committed dose
					 equivalent of 0.5 Sv (50 rem) to any individual organ or tissue. ALI values for
					 intake by ingestion and by inhalation of selected radionuclides are given in
					 Table I, Columns 1 and 2, of LAC 33:XV.499.Appendix B.
Assigned Protection Factor (APF)
- the
					 expected work place level of respiratory protection that would be provided by a
					 properly functioning respirator or a class of respirators to properly fitted
					 and trained users. Operationally, the inhaled concentration can be estimated by
					 dividing the ambient airborne concentration by the APF.
Atmosphere-Supplying Respirator
- a
					 respirator that supplies the respirator user with breathing air from a source
					 independent of the ambient atmosphere and includes supplied-air respirators
					 (SARS) and self-contained breathing apparatus (SCBA) units.
Class
- a classification scheme for
					 inhaled material according to its rate of clearance from the pulmonary region
					 of the lung. Materials are classified as D, W, or Y, which applies to a range
					 of clearance half-times: for Class D, days, of less than 10 days; for Class W,
					 weeks, from 10 to 100 days; and for Class Y, years, of greater than 100 days.
					 For purposes of these regulations,
lung class
and
inhalation class
are equivalent terms.
Constraint (Dose Constraint)
-a value
					 above which specified licensee actions are required.
Critical Group
-the group of individuals
					 reasonably expected to receive the greatest exposure to residual radioactivity
					 for any applicable set of circumstances.
Declared Pregnant Woman
- a woman who has
					 voluntarily informed the licensee, in writing, of her pregnancy and the
					 estimated date of conception. The declaration remains in effect until the
					 declared pregnant woman withdraws the declaration in writing or is no longer
					 pregnant.
Demand Respirator
- an
					 atmosphere-supplying respirator that admits breathing air to the facepiece only
					 when a negative pressure is created inside the facepiece by inhalation.
Derived Air Concentration (DAC)
- the
					 concentration of a given radionuclide in air which, if breathed by the
					 reference man for a working year of 2,000 hours under conditions of light work,
					 results in an intake of one ALI. For purposes of these regulations, the
					 condition of light work is an inhalation rate of 1.2 cubic meters of air per
					 hour for 2,000 hours in a year. DAC values are given in Table I, Column 3, of
					 LAC 33:XV.499.Appendix B.
Derived Air Concentration-Hour
					 (DAC-Hour)
- the product of the concentration of radioactive material
					 in air, expressed as a fraction or multiple of the derived air concentration
					 for each radionuclide, and the time of exposure to that radionuclide, in hours.
					 A licensee or registrant may take 2,000 DAC-hours to represent one ALI,
					 equivalent to a committed effective dose equivalent of 0.05 Sv (5 rem).
Disposable Respirator
- a respirator for
					 which maintenance is not intended and that is designed to be discarded after
					 excessive breathing resistance, sorbent exhaustion, physical damage, or
					 end-of-service-life renders it unsuitable for use. Examples of this type of
					 respirator are a disposable half-mask respirator or a disposable escape-only
					 self-contained breathing apparatus (SCBA).
Dosimetry Processor
- an individual or an
					 organization that processes and evaluates individual monitoring equipment in
					 order to determine the radiation dose delivered to the monitoring
					 equipment.
Filtering Facepiece
(
Dust
					 Mask
)- a negative pressure particulate respirator with a filter as an
					 integral part of the facepiece or with the entire facepiece composed of the
					 filtering medium that is not equipped with elastomeric sealing surfaces and
					 adjustable straps.
Fit Factor
-a quantitative estimate of the
					 fit of a particular respirator to a specific individual, which typically
					 estimates the ratio of the concentration of a substance in ambient air to its
					 concentration inside the respirator when worn.
Fit Test
-the use of a protocol to
					 qualitatively or quantitatively evaluate the fit of a respirator on an
					 individual.
Helmet
- a rigid respiratory inlet
					 covering that also provides head protection against impact and
					 penetration.
Hood
-a respiratory inlet covering that
					 completely covers the head and neck and may also cover portions of the
					 shoulders and torso.
Inhalation Class
-(see
Class
)
Loose-Fitting Facepiece
- a respiratory
					 inlet covering that is designed to form a partial seal with the face.
Lung Class
- (see
Class
)
Negative Pressure Respirator
(
Tight Fitting
)- a respirator in which the air pressure inside
					 the facepiece is negative during inhalation with respect to the ambient air
					 pressure outside the respirator.
Nonstochastic Effect
- a health effect,
					 the severity of which varies with the dose and for which a threshold is
					 believed to exist. Radiation-induced cataract formation is an example of a
					 nonstochastic effect. For purposes of these regulations,
deterministic
					 effect
is an equivalent term.
Planned Special Exposure
- an infrequent
					 exposure to radiation, separate from and in addition to the annual occupational
					 dose limits.
Positive Pressure Respirator
-a respirator
					 in which the pressure inside the respiratory inlet covering exceeds the ambient
					 air pressure outside the respirator.
Powered Air-Purifying Respirator (PAPR)
-
					 an air-purifying respirator that uses a blower to force the ambient air through
					 air-purifying elements to the inlet covering.
Pressure Demand Respirator
-a positive
					 pressure atmosphere-supplying respirator that admits breathing air to the
					 facepiece when the positive pressure is reduced inside the facepiece by
					 inhalation.
Qualitative Fit Test (QLFT)
- a pass/fail
					 fit test to assess the adequacy of respirator fit that relies on the
					 individual's response to the test agent.
Quantitative Fit Test (QNFT
)-an
					 assessment of the adequacy of respirator fit by numerically measuring the
					 amount of leakage into the respirator.
Quarter
- a period of time equal to 1/4 of
					 the year observed by the licensee, approximately 13 consecutive weeks,
					 providing that the beginning of the first quarter in a year coincides with the
					 starting date of the year and that no day is omitted or duplicated in
					 consecutive quarters.
Reference Man
- a hypothetical aggregation
					 of human physical and physiological characteristics determined by international
					 consensus. These characteristics may be used by researchers and public health
					 employees to standardize results of experiments and to relate biological insult
					 to a common base. A description of the reference man is contained in the
					 International Commission on Radiological Protection Report, ICRP Publication
					 23, "Report of the Task Group on Reference Man."
Respiratory Protective Equipment
- an
					 apparatus, such as a respirator, used to reduce an individual's intake of
					 airborne radioactive materials.
Sanitary Sewerage
- a system of public
					 sewers for carrying off wastewater and refuse, but excluding sewage treatment
					 facilities, septic tanks, and leach fields owned or operated by the licensee or
					 registrant.
Self-Contained Breathing Apparatus
					 (SCBA)
- an atmosphere-supplying respirator for which the breathing air
					 source is designed to be carried by the user.
Stochastic Effect
- a health effect that
					 occurs randomly and for which the probability of the effect occurring, rather
					 than its severity, is assumed to be a linear function of dose without
					 threshold. Hereditary effects and cancer incidence are examples of stochastic
					 effects. For purposes of these regulations,
probabilistic
					 effect
is an equivalent term.
Supplied-Air Respirator (SAR)
or
Airline Respirator
-an atmosphere-supplying respirator for
					 which the source of breathing air is not designed to be carried by the
					 user.
Tight-Fitting Facepiece
- a respiratory
					 inlet covering that forms a complete seal with the face.
User Seal Check (Fit Check
)-an action
					 conducted by the respirator user to determine if the respirator is properly
					 seated to the face (e.g., negative pressure check, positive pressure check,
					 irritant smoke test, or isoamyl acetate check).
Very High Radiation Area
- an area,
					 accessible to individuals, in which radiation levels external to the body could
					 result in an individual receiving an absorbed dose in excess of 5 Gy (500 rad)
					 in one hour at 1 meter from a source of radiation or from any surface that the
					 radiation penetrates.1
Weighting Factor [wT for an
					 Organ or Tissue (T)]
- the proportion of the risk of stochastic effects
					 resulting from irradiation of that organ or tissue to the total risk of
					 stochastic effects when the whole body is irradiated uniformly. For calculating
					 the effective dose equivalent, the values of wT
					 are:
Organ Dose Weighting Factors
Organ or Tissue
wT
Gonads
0.25
Breast
0.15
Red Bone Marrow
0.12
Lung
0.12
Thyroid
0.03
Bone Surfaces
0.03
Remainder
0.30a
Whole Body
1.00b
a0.30 results from 0.06 for each of
					 five "remainder" organs, excluding the skin and the lens of the eye, that
					 receive the highest doses.
bFor the purpose of weighting the
					 external whole body dose, for adding it to the internal dose, a single
					 weighting factor, wT = 1.0, has been specified. The use
					 of other weighting factors for external exposure will be approved on a
					 case-by-case basis until such time as specific guidance is issued.
1At very high doses received at high
					 dose rates, units of absorbed dose (e.g., gray and rad) are appropriate, rather
					 than units of dose equivalent (e.g., sievert and rem).
AUTHORITY NOTE:
					 Promulgated in accordance with
					 R.S.
					 30:2001 et
					 seq.