Impact of the thermal load on the farfield and galleries of a HLW-repository

Klubertanz, G.; Folly, M.; Hufschmied, Peter; Frank, E.

doi:10.1016/j.pce.2008.10.027

Cited by 3 publications

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“…(6), the absolute mobility, ω i , of an ion is its velocity under unit force and it is simply related to the limiting ionic equivalent conductivity, γ i , by Eq. (8), (8) where N is the Avogadro Number, Z i is the charge and F is the Faraday constant. Then we have the Nernst equation:…”

Section: The Influence Of Temperature On the Diffusionmentioning

confidence: 99%

“…The thermal evolution in a geologic repository *Author for correspondence (E-mail: liucl@pku.edu.cn). not only affects the thermo-hydro-mechanics of the containers, but also the physical and chemical properties of the host rock nearby [7][8][9][10]. The migration of radionuclides in the rock matrix carried by groundwater would also be influenced [11,12].…”

Section: Introductionmentioning

confidence: 99%

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The influence of temperature on the diffusion of ¹²⁵I⁻ in Beishan Granite

et al. 2010

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China has planned to deal with the high-level radioactive wastes (HLW) in the middle of this century with deep geologic disposal method. The release of heat from HLW may cause the rise of temperatures in the surrounding backfilling materials or even the host rock of a repository. This brings about the concerns that the temperature elevation in the host rock may change the diffusion characteristics of key radionuclides and have some unpredictable effects in the performance assessment. In this paper, the influence of temperature on the diffusion of 125 I − in Beishan Granite is studied by through diffusion method. The effective diffusion coefficients (D e ) of 125 I − in the granite from 27 to 50 • C are obtained and analyzed as a function of temperature. Our result indicated that the relationship between D e and temperature can be described by the modified Nernst equation, and the formation factors (F f ) of the granite from 27 to 50 • C is constant with an average value of 1.03 × 10 −4 .

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Section: The Influence Of Temperature On the Diffusionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The influence of temperature on the diffusion of ¹²⁵I⁻ in Beishan Granite

et al. 2010

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“…Heat emitted by high level and long-lived radioactive waste might considerably increasing the temperature in the vicinity of waste disposal sites [2][3][4]18]. Such a thermal effect raises the question how the migration of selenium is influenced at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

Temperature impact on the sorption of selenium(VI) onto anatase

Jordan¹,

Müller²,

Franzen³

et al. 2013

Journal of Colloid and Interface Science

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The diffusion of ⁷⁵Se(IV) in Beishan granite – temperature, oxygen condition and ionic strength effects

Wang

Yang

et al. 2018

Radiochimica Acta

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To explore the diffusion behavior of 75Se(IV) in Beishan granite (BsG), the influences of temperature, oxygen condition and ionic strength were investigated using the through-diffusion experimental method. The effective diffusion coefficient De of 75Se(IV) in BsG varied from 4.21×10−14 m2/s to 3.19×10−13 m2/s in our experimental conditions, increased with increasing temperature. The formation factor Ff of BsG was calculated to be nearly constant in the range of temperatures investigated, suggesting that the inner structure of BsG had no significant change in the temperature range of 20–55°C. Meanwhile, the De values of 75Se(IV) in BsG under anaerobic condition was significantly larger than that under aerobic condition, which may be attributed to the difference in the sorption characteristics and species distribution of Se and pH values. Moreover, the diffusion of 75Se(IV) was promoted with ionic strength increased from 0.01 M to 0.1 M, and then decreased at 0.5 M, mainly due to the combined effects of reduced double layers with increased ionic strength and increase of the solution viscosity at higher ionic strength.

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Impact of the thermal load on the farfield and galleries of a HLW-repository

Cited by 3 publications

References 0 publications

The influence of temperature on the diffusion of ¹²⁵I⁻ in Beishan Granite

The influence of temperature on the diffusion of ¹²⁵I⁻ in Beishan Granite

Temperature impact on the sorption of selenium(VI) onto anatase

The diffusion of ⁷⁵Se(IV) in Beishan granite – temperature, oxygen condition and ionic strength effects

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Impact of the thermal load on the farfield and galleries of a HLW-repository

Cited by 3 publications

References 0 publications

The influence of temperature on the diffusion of 125I− in Beishan Granite

The influence of temperature on the diffusion of 125I− in Beishan Granite

Temperature impact on the sorption of selenium(VI) onto anatase

The diffusion of 75Se(IV) in Beishan granite – temperature, oxygen condition and ionic strength effects

Contact Info

Product

Resources

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The influence of temperature on the diffusion of ¹²⁵I⁻ in Beishan Granite

The influence of temperature on the diffusion of ¹²⁵I⁻ in Beishan Granite

The diffusion of ⁷⁵Se(IV) in Beishan granite – temperature, oxygen condition and ionic strength effects