Contamination of ionization chamber due to tritium exposure

Conference · Sun Sep 01 04:00:00 EDT 1985 · Fusion Technol.; (United States)

OSTI ID:5789896

Matsuyama, M; Ashida, K; Ichimura, K; Sato, H; Watanabe, K

The contamination of three ionization chambers (Cu, Ni-plated, and Au-plated chambers) due to exposure to HT or HTO was measured. Considerable contamination took place for all of the chambers due to exposure to HTO. This is caused by the physical adsorption of HTO. The extent of the contamination differed from each other (Ni > Au > Cu), being considered due to difference in their surface roughness. In case of the exposure to HT, the Cu-chamber was contaminated in room air, whereas the Ni-chamber did in dry air atmosphere. This is considered due to the adsorption of HTO (being formed with catalytic exchange reaction between HT and H/sub 2/O) on the Cuchamber and that of HT on the Ni-chamber. The Au-chamber was not contaminated with the exposure to HT. This is because neither the adsorption of HT nor the catalytic exchange reaction takes place on this surface.

• Research Organization: Tritium Research Center, Toyama University, Toyama
• OSTI ID: 5789896
• Report Number(s): CONF-850405-
• Conference Information: Journal Name: Fusion Technol.; (United States) Journal Volume: 8:2
• Country of Publication: United States
• Language: English

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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Heating
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ADSORPTION
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CATALYSIS
COMPARATIVE EVALUATIONS
CONTAMINATION
COPPER
ELEMENTS
GOLD
HEAVY WATER
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
IONIZATION CHAMBERS
ISOTOPES
ISOTOPIC EXCHANGE
LIGHT NUCLEI
MEASURING INSTRUMENTS
METALS
NICKEL
NUCLEI
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
RADIATION DETECTORS
RADIOISOTOPES
ROUGHNESS
SORPTION
SURFACE PROPERTIES
TRANSITION ELEMENTS
TRITIUM
WATER
YEARS LIVING RADIOISOTOPES