Svensk Kärnbränslehantering’s research while affiliated with Stockholm University and other places

... 15 The chemistry at the bentonite-UFC interface would also be profoundly affected by the exchange of cations into and out of the interlayer space and the ionization of surface -OH groups. 16 Corrosion of various test coupons in slurries of bentonite clay has been reported in previous work, 13,17,18 and those studies have shown that the bentonite clay can have a profound impact on corrosion even when hydraulic conductivity remains relatively high. ...

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Galvanic Coupling of Copper and Carbon Steel in the Presence of Bentonite Clay and Chloride

... Due to their occurrence in the environment, they are bio-accumulated along with essential micronutrients as well as toxic elements. When compared to the essential trace elements, the activity concentrations of the alpha-emitting radionuclides in wild-growing mushrooms from unpolluted areas in this study were much lower (e.g., alpha emitters of U, Th, Ra, Rn) or lower (e.g., alpha emitters of Po, Pu, Am, or 236 U) [5,91,119,120]. In some species, such as Amanita citrina, Laccaria sp., Tricholoma populinum, Strobilomyces strobilaceus, Russula exalbicans, Leccinum aurantiacum, Hebeloma sinapizans, and Cantharellus cibarius, the amounts of uranium and thorium were higher than stable lead (Pb) or silver (Ag) [4]. As mentioned, the occurrence of natural alpha-nuclides in mushrooms is related to the geochemistry of soil bedrock, agronomic activities and climate and the presence of man-made nuclides in mushrooms depends on local radioactive pollution (nuclear test sites, facilities or accidents as well as the distance from the accident sites) as well as the impact of global atmospheric fallout. ...

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A Review of the Occurrence of Alpha-Emitting Radionuclides in Wild Mushrooms

... Stauffer et al., 1985;Souchez et al., 1995). The oxygen remains dissolved in the subglacial meltwater because of the elevated pressure beneath the melting ice (Guimerà et al., 1999). The penetration of oxidising groundwater to repository depth would enhance the corrosion of waste canister materials (e.g. ...

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Palaeohydrogeology using geochemical, isotopic and mineralogical analyses: Salinity and redox evolution in a deep groundwater system through Quaternary glacial cycles

... Data here are common to each of the climate types. As given the interpretation assumes use of either the Chamberlain formula or the model described by Bergström and Barkefors [57]. The approach is similar to that taken by Staudt et al. [54] -see Section I.4. ...

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Environmental change in post-closure safety assessment of solid radioactive waste repositories, TECDOC Series No. 1799

... Such fracture fills occur on the CFSs at Sandhem, Hjortmossen, and at Nordkroken (Mattsson 1962, Rudberg et al. 1976). They also occur more widely across the Swedish landscape interpreted as SCP (Bergman 1982, Alm and Sundblad 2002, Röshoff and Cosgrove 2002, Drake and Tullborg 2009, Friese et al. 2011. At Hjortmossen, they are mapped on convex, rather than concave, locations (Rudberg et al. 1976). ...

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Goodfellow et al., 2019 TR-19-22 Exploring alternative models for the formation of conspicuously flat basement surfaces in southern Sweden

... The results from previous flushing water investigations in Forsmark during drilling of KFM01, 02, 04 and 05 have been reported /Pedersen, 2003;Pedersen and Kalmus, 2003;Hallbeck et.al. 2004/. ...

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P-05-81 Forsmark site investigation Control of microorganism content in flushing water used for drilling of KFM06A

... Surface hydrology is considered to be the most important driving variable for transport and accumulation processes e.g. [11] and it will be subjected to quantitative modelling and simulation using site specific data in order to understand vertical and horizontal movement of surface water. The functional units of the landscape are defined by catchment areas that are constructed from water divides in the landscape ( fig.3). ...

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A strategy for biosphere descriptions during site investigations for a repository of spent nuclear fuel

... A programme of work has been carried out over a number of years to investigate a range of corrosion issues associated with the canister, including the possibility of expansion of the outer copper canister as a result of the anaerobic corrosion of the cast iron insert. Experimental work using stacks of copper and iron test specimens has not shown any evidence of corrosion-induced expansion (Smart et al. 2006). However, as a further step in developing an understanding of the likely performance of the canister in a repository environment, Amec Foster Wheeler has set up a series of experiments in SKB's Äspö Hard Rock Laboratory (HRL) using inactive model canisters, in which leaks were deliberately introduced into the outer copper canister while surrounded by bentonite, with the aim of obtaining information about the corrosion evolution of the internal environment (Smart et al. 2007). ...

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Miniature Canister (MiniCan) Corrosion experiment Progress report 5 for 2008–2013

... More detailed studies of the hydrological implications during periods of glaciation, including the formation of meltwater tunnels in the ice and permafrost considerations have been conducted (e.g. Boulton et al., 1995 Boulton et al., , 2001 Jaquet and Siegel, 2003; Chan et al., 2005; Jaquet and Siegel, 2006). Also, an extensive review on the theoretical knowledge of ice sheet hydrology is provided by Jansson et al. (2006). ...

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Long-term oxygen depletion from infiltrating groundwaters: Model development and application to intra-glaciation and glaciation conditions

... Not surprisingly, this result is exactly the same as that have a negligible effect on the concentration [Haggerty, 1999]. ...

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Solute transport along a single fracture with a finite extent of matrix: A new simple solution and temporal moment analysis