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quantity the aggregate radioactivitysels in the packaging retain their inf which does not exceed that specified tegrity of containment. s follows:
(p) Maximum normal operating pressure maximum normal operating pres
sure is the maximum pressure above Transport group
Type A1 Type B (see 49 CFR 173.389(h)) quantity quantity
atmospheric pressure at mean sea level (in curies) (in curies) that would develop in the containment
system in a period of 1 year, under the 0.001
conditions of temperature and solar ra0.05
diation corresponding to environmental 200
conditions of transport in absence of 200 5,000
venting, external cooling by an ancillary VI and VII.... ... 1,000
50,000 system, or operational controls during special form..----
transport. 1 Except that for California-252 the Type
(Sec. 1, 49 Stat. 1889; 46 U.S.C. 391a)
CGFR 68–142, 34 F.R. 2088, Feb. 12, 1969, A quantity limit for special form is 2 curies.
as amended by CGD 71–139a, 37 F.R. 14585, (0) Containment system-contain July 21, 1972; CGD 72-91R, 17968, Sept. 2, ment system of a radioactive materials
1972] package is those components of the pack
NOTE: Footnote 1 is effective Oct. 20, 1972. aging, including special form encapsu
Paragraphs (o) and (p) are effective Dec. 30,
1972. lation where used, which have been specified by the package designer as intended
$ 146.19-5 Transport groups of radio to retain the radioactive contents during
nuclides. transport, whether or not individual ves- (a) List of radionuclides:
1 Atomic number shown in parentheses.
Atomic weight shown after the radionuclide symbol. : Uncompressed means at a pressure not exceeding 14.7 p.s.i. (absolute). 4 Fissile radioactive material.
N OTE 1.-No unlisted radionuclide shall be assigned to Groups IV, V, VI, or VII.
(c) For mixtures of radionuclides the following shall apply:
(1) If the identity and respective activity of each radionuclide are known, the permissible activity of each radionuclide shall be such that the sum, for all groups present, of the ratio between the total activity for each group to the permissible activity for each group will not be greater than unity.
(2) If the groups of the radionuclides are known but the amount in each group cannot be reasonably determined, the mixture shall be assigned to the most restrictive group present.
(3) If the identity of all or some of the radionuclides cannot be reasonably determined, each of those unidentified radionuclides shall be considered as belonging to the most restrictive group which cannot be positively excluded.
(4) Mixtures consisting of a single radioactive decay chain where the radionuclides are in the naturally occurring proportions shall be considered as consisting of a single radionuclide. The group and activity shall be that of the first member present in the chain, except if a radionuclide "X" has a half-life longer than that of that first member and an activity greater than that of any other member including the first at any time during transportation; in that case, the transport group of the nuclide "X" and the activity of the mixture shall be the maximum activity of that nuclide “X” during transportation, § 146.19-10 General packaging require
ments. (a) Unless otherwise specified, all shipments of radioactive materials must meet all requirements of this section, and must be packaged as prescribed in 88 146.19–10 through 146.19–20 and $ 146.19-100.
(b) The outside of each package must incorporate a feature such as a seal, which is not readily breakable and which, while intact, will be evidence that the package has not been illicitly opened.
(c) The smallest outside dimension of any package must be 4 inches or greater.
(d) Radioactive materials must be packaged in packagings which have been designed to maintain shielding efficiency and leak tightness, so that, under conditions normally incident to transportation, there will be no release of radioactive material. If necessary, additional suitable inside packaging must be used. Each package must be capable of meeting the standards in § 146.19-27(b). Specification containers listed as authorized for radioactive materials shipments may be assumed to meet those standards, provided the packages do not exceed the gross weight limits prescribed for those containers in the applicable DOT regulations.
(1) Internal bracing or cushioning, where used, must be adequate to assure that, under the conditions normally Incident to transportation, the distance from the inner container or radioactive material to the outside wall of the package remains within the limits for which the package design was based, and the radiation dose rate external to the package does not exceed the transport index number shown on the label. Inner shield closures must be positively secured to prevent loss of the contents.
(e) The packaging must be so designed, constructed, and loaded that, when transporting large quantities of radioactive material:
(1) The heat generated within the package because of the radioactive materials present will not, at any time during transportation, affect the efficiency of the package under the conditions normally incident to transportation, and
(2) The temperature of the accessible external surfaces of the package will not exceed 122° F. In the shade when fully loaded, assuming still air at ambient temperature. If the package is transported as full load, the maximum accessible external surface temperature shall be 180° F.
(f) Pyrophoric materials, in addition to the packaging prescribed in this subpart, must also meet the packaging requirements of Subparts 146.21 and 146.22.
(g) Liquid radioactive material must be packaged in or within a leak-resistant