Optimal Parameter Determination for Tritiated Water Storage in Polyacrylic Networks

Due to the remarkable capacity of water retaining, croslinked polyacrylic acids (PAA) represent an interesting alternative for tritiated water trapping. The study was developed on radiolytical processes in PAA:HTO systems derivated from irradiation of polymeric network by disintegration of tritium a...

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Bibliographic Details
Published in:Fusion science and technology 2005-08, Vol.48 (1), p.220-223
Main Authors: Postolache, C., Matei, Lidia, Georgescu, Rodica, Ionita, Gh
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CARBON 14
COBALT 60
GAMMA RADIATION
HYDROGELS
HYDROPHYLIC POLYMERS
IRRADIATION
LIQUID WASTES
PHOTON EMISSION
RADIATION DOSES
RADICALS
SIMULATION
STORAGE
SWELLING
TRAPPING
TRITIUM
TRITIUM OXIDES
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Summary:Due to the remarkable capacity of water retaining, croslinked polyacrylic acids (PAA) represent an interesting alternative for tritiated water trapping. The study was developed on radiolytical processes in PAA:HTO systems derivated from irradiation of polymeric network by disintegration of tritium atoms from HTO. The aim of these studies is the identification of polymeric structures and optimal storage conditions. Sol and gel fractions were determinated by radiometrical methods using PAA labeled with 14-C at carboxylic groups and T at main chains of the polymer. Simulation of radiolytical processes was realized using γ radiation field emitted by a irradiation source of 60-Co which ensures a maximum of absorbed dose rate of 3 kGy/h. Self-radiolytical effects were investigated using labeled PAA in HTO with great radioactive concentration (37-185 GBq/mL). The experiment suggests as optimum for HTO storage as tritium liquid wastes a 1:30 PAA:HTO swelling degree at 18.5-37 MBqL. HTO radioactive concentration. RES studies of radiolytical processes were also realized on dry polyacrylic acid (PAA) and polyacrylic based hydrogels irradiated and determined at 77 K. In the study we observed the effect of swelling capacity of hydrogel o the formation of free radicals.
ISSN:1536-1055
1943-7641
DOI:10.13182/FST05-A916