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2014:46 Technical Note, QA in SKB’s Groundwater Flow Modelling
SR-Site, for the proposed repository at Forsmark. The specific objective is to get an understanding and an assessment of SKB’s quality assurance of the groundwater flow modelling in connection to SR-Site ... of the modelling work and the traceability of the modelling analysis and results through the safety assessment. General QA issues in groundwater flow modelling were identified and the QA review focused...
Content type: Publications -
2014:44 Technical Note, Independent evaluation of the number of critical canister positions in the KBS-3 repository at Forsmark – Main Review Phase
simulations of SKB's geological discrete-fracture network (Geo-DFN) models, and taking into account SKB's full-perimeter criterion (FPC) and extended full-perimeter criterion (EFPC) to screen out canister positions ... (2007) were assessed: (1) r0-fixed model, (2) OSM+TFM (outcrop-scale model + tectonic fault model), and (3) TCM (tectonic continuum model). Consequences of variation of fracture intensity (P32) were also...
Content type: Publications -
2014:43 Technical Note, Workshop on general corrosion of copper
the issues discussed and extracts the essential viewpoints that have been expressed. It should not be considered as a comprehensive record of all the discussions at the workshop and individual statements ... should be regarded as opinions rather than SSM’s point of view. Based on the information, arguments and analyses presented in the workshop, it has been concluded that no safety-significant impacts on the...
Content type: Publications -
2014:41 Technical Note, Review of Radionuclide Abstraction and Selection in the SKB Safety Case -Main Review Phase
As part of the Swedish Radiation Safety Authority (SSM) review of the Swedish Nuclear Fuel and Waste Management Company (SKB) SR-Site safety assessment for a spent nuclear fuel repository in Sweden, this ... the abstraction and selection of radionuclides in the SKB safety case. Specifically, CNWRA evaluated whether the SKB approach to assess, select, and model individual radionuclides and decay chains of multiple...
Content type: Publications -
2014:40 Technical Note, Review of Performance Confirmation Programs and Potential Roles in SSM’s Current Review of SKB’s License Application – Main Review Phase
of disposal designs and engineered barriers, test data on engineered barriers, and the integration of a series of models representing processes controlling the containment, release and migration of radionuclides ... construction, operations, and waste emplacement, however, presents an extended, additional opportunity to seek and obtain further confirmation of the performance, effectiveness, and reliability of the repository...
Content type: Publications -
2014:39 Technical Note, “Wormhole” and Multiple Loss of Buffer Safety Function Scenarios
formation and loss of multiple buffer safety functions. The “wormhole” scenario was hypothesized during the SSM Workshop on “What-if” Canister Corrosion and was based on FEP BU07 “piping and erosion of ... hypothetical size and location of the pipe is shorter than previously predicted. Note that the corrosion analysis was made by assuming that a pipe can be formed. No analysis of how the pipe could form and become...
Content type: Publications -
2014:38 Technical Note, Detailed assessment of radionuclide Kd-values for the geosphere-main review phase
(SSM) is reviewing an application submitted by the Swedish Nuclear Fuel and Waste Management Company (SKB) in 2011 to construct and operate a deep geologic repository for spent nuclear fuel at the Forsmark ... presented details of its long-term safety assessment, SR-Site, in a main report (SKB, 2011, TR-11-01) and in multiple supporting technical documents that are cited by the main report. In developing the safety...
Content type: Publications -
2014:35 Technical Note, Modelling comparison of alternative biosphere models with LDF models and evaluation of selected parameter values used in the biosphere dose assessment - Main review phase
specifically issues of transport, accumulation and transfers of radionuclides in the near surface environment and the way in which doses to future human and non-human populations can arise. The issues addressed ... alternative biosphere modelling approach; and an evaluation of key parameters used in the SKB biosphere model, including whether transfer rates and selected Kd values and concentration ratios are appropriate...
Content type: Publications -
2014:34 Technical Note, Modelling Comparison of Simple Reference Biosphere Models with LDF Models – Main Review Phase
developed and described in a systematic manner, based on international guidance reflected in the International Atomic Energy Agency’s BIOMASS approach. The context for the modelling is described and SR-Site ... biosphere and land uses at Forsmark. This information is used to justify development of biosphere models to represent potential future radionuclide releases to marine, lake, mire, forest, pasture and arable...
Content type: Publications -
2014:33 Technical Note, Reproduction of SKB’s Canister Failure Calculations - What-If and ‘Residual’ Scenario to Illustrate Barrier Functions
The Swedish Nuclear Fuel and Waste Management Company (SKB) included analysis of a range of scenarios in its SR-Site report. SKB grouped these scenarios into two categories—main and residual. The main scenario ... likely scenario (corrosion failure) and a less probable scenario (seismicity-induced shear failure). The residual scenario included two unlikely scenarios—isostatic-load and growing pinhole failures. For each...
Content type: Publications