Evaluation of tritium behavior in concrete

Furuichi, Kazuya; Takata, Hitoshi; Katayama, Kazunari; Takeishi, Toshiharu; Nishikawa, Masabumi; Hayashi, T.; Kobayashi, Kazuhiro; Namba, Haruyuki

doi:10.1016/j.jnucmat.2007.03.227

Cited by 17 publications

(12 citation statements)

References 7 publications

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“…4. Uses of Eq (14) and Eq(15) with diffusive parameters given in Table 2 allowed the reproduction of the experimental data by associated modelling curves which are also reported in Fig. 4.…”

Section: Hto Diffusion Data Using Vapor Exchange Approachmentioning

confidence: 97%

“…Secondly, tritiated water can occur under both liquid and vapor forms in unsaturated cement-based materials used in several types of nuclear facilities, e.g. near-surface disposal facilities, fusion reactor or tritium handling facility [13][14][15][16][17]. Under these conditions, further investigations are thus necessary to determine if HTO diffusion rates are as high as gas diffusive rates [6] or as low as the ionic solutes ones [4] when dehydrating.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

How mobile is tritiated water through unsaturated cement-based materials? New insights from two complementary approaches

Savoye

Rajyaguru

Macé

et al. 2018

Applied Radiation and Isotopes

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This work presents a novel approach to study tritiated water (HTO) diffusion through unsaturated cement-based materials (hardened CEM V/A cement pastes). The diffusion studies were performed under hydric conditions covering those that can prevail in near-surface disposal facilities for short-lived nuclear waste. In order to investigate the required large range of suction, two complementary techniques were developed. The first technique was based on a through-diffusion method where suction (up to 9 MPa) was controlled using osmosis process. In the second technique diffusion experiments were performed in humidity chambers controlled by under-saturated saline solutions (suction up to 170 MPa). Tritiated water (HTO) was added in the saline solution and diffused through the studied material in gas form. This latter method showed that the extent of irreversible HTO uptake on cement-based materials increased with desaturation. Moreover, diffusive data acquired by means of the two techniques revealed a decrease of effective diffusion coefficient by a factor of 10 from 100% to 23% of saturation degree. Comparison with dihydrogen (HT) diffusion results suggests that HTO diffuses through unsaturated cement-based materials at rates more than 4 orders of magnitude lower.

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Section: Hto Diffusion Data Using Vapor Exchange Approachmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

How mobile is tritiated water through unsaturated cement-based materials? New insights from two complementary approaches

Savoye

Rajyaguru

Macé

et al. 2018

Applied Radiation and Isotopes

View full text Add to dashboard Cite

show abstract

“…T transfer in concrete has been correlated in terms of effective diffusivity [4][5][6][13][14][15][16][17][18]. However, there are fewer researches on behavior of T transfer in concrete coated with hydrophobic paints [11,12,19].…”

Section: Introductionmentioning

confidence: 99%

Transfer of tritium in concrete coated with hydrophobic paints

Fukada

Edao

Sato

et al. 2012

Fusion Engineering and Design

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“…Basic tritium transport phenomena in concrete materials have been reported [1][2][3][4][5][6][7][8]. Diffusion of tritium in concrete, mortar and cement paste was investigated by a permeation method [3,8] and a soaking method [1,2,[4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Diffusion of tritium in concrete, mortar and cement paste was investigated by a permeation method [3,8] and a soaking method [1,2,[4][5][6]. Rate-determining step of tritium migration through concrete materials is diffusion in pores of cement paste, and the diffusivity is reported in the range of 10 −11 -10 −12 m 2 /s.…”

Section: Introductionmentioning

confidence: 99%