Simple system for measuring tritium Ad/absorption using a 2. pi. counter and thermal desorption spectrometer

Conference · Sun Mar 01 00:00:00 EST 1992 · Fusion Technology; (United States)

OSTI ID:5129885

Miyake, H; Matsuyama, M; Watanabe, K ^[1]; Cowgill, D F ^[2]

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1. Hydrogen Isotope Research Center, Toyama Univ., Gofuku 3190, Toyama 930 (JP)
2. Tritium Research Lab., Sandia National Lab., Livermore, CA (US)

In this paper, the authors develop a simple system using tritium tracer and thermal desorption techniques to measure the tritium adsorption and/or absorption on/in a material having typical surface conditions: namely, not cleaned surface. The tritium counting devices used were a 2{pi} counter and conventional proportional counter. With this system, the amounts of ad/absorption could be measured without exposing the samples to air after exposing them to tritium gas. The overall efficiency (F) of the 2{pi} counter was described at F = exp({minus}2.64h), where h is the distance from the sample to the detector. Ad/absorption measurements were carried out for several materials used for fabricating conventional vacuum systems. The results were, in the order of decreasing amounts of ad/absorption, as (fiber reinforced plastics(FRP)) {gt} (nickel(Ni), molybdenum disulfide(MoS{sub 2})) {gt} (stainless steel (SS304), iron(Fe), aluminum alloy(A2219)) {gt} (boron nitride(h-BN), silicon carbide (SiC), SS304 passivated by anodic oxidation layers(ASS) and that by boron nitride segregation layers (BSS)). The relative amounts were abut 100 for Ni and 0.1 for ASS and BSS, being normalized to Fe = 1.

• OSTI ID: 5129885
• Report Number(s): CONF-910920-; CODEN: FUSTE
• Journal Information: Fusion Technology; (United States), Vol. 21:2; Conference: 4. topical meeting on tritium technology in fission, fusion, and isotopic applications, Albuquerque, NM (United States), 29 Sep - 4 Oct 1991; ISSN 0748-1896
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Ma
47 OTHER INSTRUMENTATION
COUNTING TECHNIQUES
FABRICATION
TRITIUM
ADSORPTION
ABSORPTION
DESIGN
DESORPTION
DIAGNOSTIC TECHNIQUES
EFFICIENCY
MATERIALS
MEASURING METHODS
SPECTROSCOPY
TEMPERATURE EFFECTS
TRACER TECHNIQUES
VACUUM SYSTEMS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
HYDROGEN ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
NUCLEI
ODD-EVEN NUCLEI
RADIOISOTOPES
SORPTION
YEARS LIVING RADIOISOTOPES
700480* - Fusion Technology- Component Development
Materials Studies- (1992-)
440800 - Miscellaneous Instrumentation- (1990-)