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ASTM-D3803 2009

$44.96

D3803-91(2009) Standard Test Method for Nuclear-Grade Activated Carbon

Published By Publication Date Number of Pages
ASTM 2009 18
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ASTM D3803-91-Reapproved2009

Historical 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 and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

Activated carbon; Containment systems/applications; Iodine retention test; Methyl iodide penetration test; Nuclear reactor vessels

ICS Code

ICS Number Code 71.040.30 (Chemical reagents)

DOI: 10.1520/D3803-91R09

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
2 Summary of Test Method
Significance and Use
Apparatus
FIG. 1
3 FIG. 2
4 FIG. 3
TABLE 1
5 Materials
Hazards
Sampling
Preparation of Apparatus
6 Calibration
Procedure
8 Calculation
9 Reports
Precision and Bias
10 A1. ADDITIONAL GUIDANCE FOR USE OF TEST METHOD D3803
A1.1
FIG. A1.1
11 A1.2
A1.3
A2. CALCULATION OF THE PENETRATION OF THE TEST BED AND EFFICIENCY OF THE FIRST BACKUP BED AND THEIR ASSOCIATED UNCERTAINTIES FROM DATA OBTAINED USING A GROSS GAMMA COUNTER WITHOUT ENERGY DISCRIMINATION
A2.1
A2.2
A2.3
12 A3. CALCULATION OF THE PENETRATION OF THE TEST BED AND EFFICIENCY OF THE FIRST BACKUP BED AND THEIR ASSOCIATED UNCERTAINTIES FROM DATA OBTAINED USING A GAMMA SPECTROMETER WITH ENERGY DISCRIMINATION
A3.1
A3.2
A4. SAMPLE REPORT FORMS FOR REPORTING RESULTS
A4.1
A4.2
13 FIG. A4.1
14 FIG. A4.2
15 FIG. A4.3
16 A5.1
FIG. A4.4
17 TABLE A5.1
TABLE A5.2
TABLE A5.3
18 TABLE A5.4
TABLE A5.5
ASTM-D3803 2009
$44.96