ASTM C1500-08(2017)
用被动中子多重计数法无损测定钚的标准试验方法

Standard Test Method for Nondestructive Assay of Plutonium by Passive Neutron Multiplicity Counting

标准号

ASTM C1500-08(2017)

发布

2008年

发布单位

美国材料与试验协会

当前最新

ASTM C1500-08(2017)

 

 

引用标准

ASTM C1030 ASTM C1207 ASTM C1458 ASTM C1490 ASTM C1592 ASTM C1673

适用范围

5.1 This test method is useful for determining the plutonium content of items such as impure Pu oxide, mixed Pu/U oxide, oxidized Pu metal, Pu scrap and waste, Pu process residues, and weapons components.

5.2 Measurements made with this test method may be suitable for safeguards or waste characterization requirements such as:

5.2.1 Nuclear materials accountability,

5.2.2 Inventory verification (7),

5.2.3 Confirmation of nuclear materials content (8),

5.2.4 Resolution of shipper/receiver differences (9),

5.2.5 Excess weapons materials inspections (10, 11),

5.2.6 Safeguards termination on waste (12, 13),

5.2.7 Determination of fissile equivalent content (14).

5.3 A significant feature of neutron multiplicity counting is its ability to capture more information than neutron coincidence counting because of the availability of a third measured parameter, leading to reduced measurement bias for most material categories for which suitable precision can be attained. This feature also makes it possible to assay some in-plant materials that are not amenable to conventional coincidence counting, including moist or impure plutonium oxide, oxidized metal, and some categories of scrap, waste, and residues (10).

5.4 Calibration for many material types does not require representative standards. Thus, the technique can be used for inventory verification without calibration standards (7), although measurement bias may be lower if representative standards were available.

5.4.1 The repeatability of the measurement results due to counting statistics is related to the quantity of nuclear material, interfering neutrons, and the count time of the measurement (15) .

5.......

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