ASTM-D3803 2022

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D3803-91(2022) Standard Test Method for Nuclear-Grade Activated Carbon

Published By	Publication Date	Number of Pages
ASTM	2022	18

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Categories: 71.040.30 - Chemical reagents, ASTM

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Description

ASTM D3803-91-Reapproved2022

Active Standard: Standard Test Method for Nuclear-Grade Activated Carbon

ASTM D3803

Scope

1.1 This test method is a very stringent procedure for establishing the capability of new and used activated carbon to remove radio-labeled methyl iodide from air and gas streams. The single test method described is for application to both new and used carbons, and should give test results comparable to those obtained from similar tests required and performed throughout the world. The conditions employed were selected to approximate operating or accident conditions of a nuclear reactor which would severely reduce the performance of activated carbons. Increasing the temperature at which this test is performed generally increases the removal efficiency of the carbon by increasing the rate of chemical and physical absorption and isotopic exchange, that is, increasing the kinetics of the radioiodine removal mechanisms. Decreasing the relative humidity of the test generally increases the efficiency of methyl iodide removal by activated carbon. The water vapor competes with the methyl iodide for adsorption sites on the carbon, and as the amount of water vapor decreases with lower specified relative humidities, the easier it is for the methyl iodide to be adsorbed. Therefore, this test method is a very stringent test of nuclear-grade activated carbon because of the low temperature and high relative humidity specified. This test method is recommended for the qualification of new carbons and the quantification of the degradation of used carbons.

1.1.1 Guidance for testing new and used carbons using conditions different from this test method is offered in Annex A1.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

ICS Code

ICS Number Code 71.040.30 (Chemical reagents)

DOI: 10.1520/D3803-91R22

Additional information

Standard Title	D3803-91(2022) Standard Test Method for Nuclear-Grade Activated Carbon
Published Code	ASTM
Publication Date	2022
Pages Count	18
ICS Codes	71.040.30 - Chemical reagents

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ASTM-D3803 2022

ASTM D3803-91-Reapproved2022

Active Standard: Standard Test Method for Nuclear-Grade Activated Carbon

ASTM D3803

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