| (140) Security zone--Any temporary or permanent area
established by the licensee for the physical protection of category
1 or category 2 quantities of radioactive material.
(141) Self-contained breathing apparatus (SCBA)--An
atmosphere-supplying respirator for which the breathing air source
is designed to be carried by the user.
(142) Shallow-dose equivalent (Hs )
(which applies to the external exposure of the skin of the whole body
or the skin of an extremity)--The dose equivalent at a tissue depth
of 0.007 centimeter (seven milligrams/square centimeter).
(143) SI--The abbreviation for the International System
of Units.
(144) Sievert (Sv )--See §336.3
of this title (relating to Units of Radiation Exposure and Dose).
(145) Site boundary--That line beyond which the land
or property is not owned, leased, or otherwise controlled by the licensee.
(146) Source material--
(A) uranium or thorium, or any combination thereof,
in any physical or chemical form; or
(B) ores that contain, by weight, 0.05% or more of
uranium, thorium, or any combination thereof. Source material does
not include special nuclear material.
(147) Special form radioactive material--Radioactive
material which is either a single solid piece or is contained in a
sealed capsule that can be opened only by destroying the capsule and
which has at least one dimension not less than five millimeters and
which satisfies the test requirements of 10 Code of Federal Regulations §71.75
as amended through September 28, 1995 (60 FR 50264) (Transportation
of License Material).
(148) Special nuclear material--
(A) plutonium, uranium-233, uranium enriched in the
isotope 233 or in the isotope 235, and any other material that the
National Regulatory Commission, under the provisions of the Atomic
Energy Act of 1954, §51, as amended through November 2, 1994
(Public Law 103-437), determines to be special nuclear material, but
does not include source material; or
(B) any material artificially enriched by any of the
foregoing, but does not include source material.
(149) Special nuclear material in quantities not sufficient
to form a critical mass--Uranium enriched in the isotope 235 in quantities
not exceeding 350 grams of contained uranium-235; uranium-233 in quantities
not exceeding 200 grams; plutonium in quantities not exceeding 200
grams; or any combination of these in accordance with the following
formula: For each kind of special nuclear material, determine the
ratio between the quantity of that special nuclear material and the
quantity specified in this paragraph for the same kind of special
nuclear material. The sum of such ratios for all of the kinds of special
nuclear material in combination shall not exceed 1. For example, the
following quantities in combination would not exceed the limitation:
(175 grams contained U-235/350 grams) + (50 grams U-233/200 grams)
+ (50 grams Pu/200 grams) = 1.
(150) Specific license--A licensing document issued
by an agency upon an application filed under its rules. For purposes
of the rules in this chapter, "radioactive material license"
is an equivalent term. Unless stated otherwise, "license"
as used in this chapter means a "specific license."
(151) State--The state of Texas.
(152) 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 the rules in this chapter, "probabilistic
effect" is an equivalent term.
(153) 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.
(154) Survey--An evaluation of the radiological conditions
and potential hazards incident to the production, use, transfer, release,
disposal, and/or presence of radioactive materials or other sources
of radiation. When appropriate, this evaluation includes, but is not
limited to, physical examination of the location of radioactive material
and measurements or calculations of levels of radiation or concentrations
or quantities of radioactive material present.
(155) Telemetric position monitoring system--A data
transfer system that captures information from instrumentation and/or
measuring devices about the location and status of a transport vehicle
or package between the departure and destination locations.
(156) Termination--As applied to a license, a release
by the commission of the obligations and authorizations of the licensee
under the terms of the license. It does not relieve a person of duties
and responsibilities imposed by law.
(157) Tight-fitting facepiece--A respiratory inlet
covering that forms a complete seal with the face.
(158) Total effective dose equivalent (TEDE)--The sum
of the effective dose equivalent (for external exposures) and the
committed effective dose equivalent (for internal exposures).
(159) Total organ dose equivalent (TODE)--The sum of
the deep-dose equivalent and the committed dose equivalent to the
organ receiving the highest dose as described in §336.346(a)(6)
of this title (relating to Records of Individual Monitoring Results).
(160) Transuranic waste--For the purposes of this chapter,
wastes containing alpha emitting transuranic radionuclides with a
half-life greater than five years at concentrations greater than 100
nanocuries/gram.
(161) Trustworthiness and reliability--Characteristics
of an individual considered dependable in judgment, character, and
performance, such that unescorted access to category 1 or category
2 quantities of radioactive material by that individual does not constitute
an unreasonable risk to the public health and safety or security.
A determination of trustworthiness and reliability for this purpose
is based upon the results from a background investigation.
(162) Type A quantity (for packaging)--A quantity of
radioactive material, the aggregate radioactivity of which does not
exceed A 1 for special form radioactive material or A2 for normal
form radioactive material, where A1 and A2 are given in or shall be
determined by procedures in Appendix A to 10 Code of Federal Regulations
Part 71 as amended through September 28, 1995 (60 FR 50264) (Packaging
and Transportation of Radioactive Material).
(163) Type B quantity (for packaging)--A quantity of
radioactive material greater than a Type A quantity.
(164) Unescorted access--Solitary access to an aggregated
category 1 or category 2 quantity of radioactive material or the devices
that contain the material.
(165) Unrefined and unprocessed ore--Ore in its natural
form before any processing, such as grinding, roasting, beneficiating,
or refining.
(166) Unrestricted area--Any area that is not a restricted
area.
(167) User seal check (fit check)--An action conducted
by the respirator user to determine if the respirator is properly
seated to the face. Examples include negative pressure check, positive
pressure check, irritant smoke check, or isoamyl acetate check.
(168) Very high radiation area--An area, accessible
to individuals, in which radiation levels from radiation sources external
to the body could result in an individual receiving an absorbed dose
in excess of 500 rads (five grays) in one hour at one meter from a
source of radiation or one meter from any surface that the radiation
penetrates.
(169) Violation--An infringement of any provision of
the Texas Radiation Control Act (TRCA) or of any rule, order, or license
condition of the commission issued under the TRCA or this chapter.
(170) Waste--Low-level radioactive wastes containing
source, special nuclear, or byproduct material that are acceptable
for disposal in a land disposal facility. For the purposes of this
definition, low-level radioactive waste means radioactive waste not
classified as high-level radioactive waste, transuranic waste, spent
nuclear fuel, or byproduct material as defined in paragraph (20)(B)
- (E) of this section.
(171) Week--Seven consecutive days starting on Sunday.
(172) 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:
Attached Graphic
(173) Whole body--For purposes of external exposure,
head, trunk including male gonads, arms above the elbow, or legs above
the knee.
Cont'd... |
