These practices are intended to provide the nuclear industry with procedures for obtaining representative bulk samples from uranium-ore concentrates (UOC) and for obtaining a series of representative secondary samples from the original bulk sample for the determination of moisture and other test purposes, and for the preparation of pulverized analytical samples. These practices consist of a number of alternative procedures for (1) primary sampling such as one-stage falling stream, two-stage falling stream, and Auger sampling; (2) secondary sampling such as straight-path (reciprocating) cutter sampling and rotating (Vezin) cutter multi-sampling; (3) sample preparation such as concurrent-drying, natural moisture, and calcination; and (4) sample packaging such as wax sealing and vacuum sealing. These procedures do not include requirements for health, safety, and accountability. The material and sampling equipment requirements are detailed. Schematic diagrams of the primary and secondary samplers are provided.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 These practices are intended to provide the nuclear industry with procedures for obtaining representative bulk samples from uranium-ore concentrates (UOC) (see Specification C967).
1.2 These practices also provide for obtaining a series of representative secondary samples from the original bulk sample for the determination of moisture and other test purposes, and for the preparation of pulverized analytical samples (see Test Methods C1022).
1.3 These practices consist of a number of alternative procedures for sampling and sample preparation which have been shown to be satisfactory through long experience in the nuclear industry. These procedures are described in the following order.
|Primary Sampling||One-stage falling stream||4 |
| Two-stage falling stream||5 |
| Auger||6 |
|Secondary Sampling||Straight-path (reciprocating)||7 |
| Rotating (Vezin)||8, 9 |
|Sample Preparation||10 |
| Concurrent-drying||11-13 |
| Natural moisture||14-16|
| Calcination||17, 18 |
|Sample Packaging||19 |
| Wax sealing||20 |
| Vacuum sealing||21 |
1.3.1 The primary and secondary sampling stages can be organized in the following way:
1.3.2 It is possible to combine the various elements of these stages in different ways to give satisfactory results depending on the agreed requirements of the contracting parties. For a given stage, however, each procedure must be regarded as a whole. It is highly inadvisable to mix elements belonging to different procedures.
1.4 These procedures do not include requirements for health, safety, and accountability. The observance of these practices does not relieve the user of the obligation to be aware of and to conform to all applicable international, federal, state, and local regulations pertaining to processing, shipping, or using uranium-ore concentrates. (Guidance is provided in CFR 10, Chapter 1.)
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C967 Specification for Uranium Ore Concentrate
C1022 Test Methods for Chemical and Atomic Absorption Analysis of Uranium-Ore Concentrate
sampling; UOC; uranium ore; uranium-ore concentrate; Falling stream method; Natural moisture method; Nuclear fuels (reactor); Reciprocating cutter method; Sampling nuclear/related energy sources; Specimen preparation (for testing)--nuclear applications; Uranium; Uranium ore; Vacuum seals/sealing; Vezzin method; Auger sampling method; Calcination methods; Concrete tanks;
ICS Number Code 27.120.30 (Fissile materials and nuclear fuel technology)
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