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Scope

1.1 This guide provides advice for conducting experiments to investigate the effects of helium on the properties of metals where the technique for introducing the helium differs in some way from the actual mechanism of introduction of helium in service. Simulation techniques considered for introducing helium shall include charged particle implantation, exposure to [alpha]-emitting radioisotopes, and tritium decay techniques. Procedures for the analysis of helium content and helium distribution within the specimen are also recommended.

1.2 Two other methods for introducing helium into irradiated materials are not covered in this guide. They are the enhancement of helium production in nickel-bearing alloys by spectral tailoring in mixed-spectrum fission reactors, and isotopic tailoring in both fast and mixed-spectrum fission reactors. These techniques are described in Refs (1-5). Dual ion beam techniques (6) for simultaneously implanting helium and generating displacement damage are also not included here. This latter method is discussed in Practice E521.

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

Alpha particle radioactivity; Deformation; Density-nuclear-grade materials; Destructive testing-irradiation; Dosimetry; Electron radiation; Energy deposition-ionizing radiation; Fluence; Foil extraction; Helium; Ion displacement; Metallography; Metals and metallic materials-irradiation; Neutron radiation; Photomicrography; Radiation exposure-nuclear materials/applications; Surface analysis-nuclear materials; Swelling; simulation of helium effects in irradiated metals, guide,; Heating tests-metals; Irradiance/irradiation; simulation of helium effects in irradiated metals,guide,; Purity; beam purity, simulation of helium effects in irradiated metals, guide,;Order Form; ICS Number Code 77.040.99 (Other methods of testing metals)

To find similar documents by ASTM Volume:

12.02 (Nuclear (II), Solar, and Geothermal Energy)

To find similar documents by classification:

77.040.99 (Other methods of testing of metals)

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