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Din avgränsning ger 9 träffar.

• 2013:14 Approaches used for Clearance of Lands from Nuclear Facilities among Several Countries – Evaluation for Regulatory Input

  clearance of materials, rooms, buildings and land (SSMFS 2011:2). The regulations specify that license holders for practices involving ionising radiation shall take measures after the cessation of the practice ... practice to achieve clearance of rooms, buildings and land. The regulations state nuclide specific clearance levels in becquerel per m2 for rooms and buildings, but give no information on levels to be used...

  Innehållstyp: Publikationer

• 2013:36 Technical Note, Review and assessment of aspects of the Qeq concept – Main Review Phase

  transport of dissolved constituents in the near field at the Forsmark site, in particular the Qeq abstraction for diffusive transport.  SKB uses the Qeq parameter to scale concentration gradients in order ... order to estimate dissolved-species fluxes from the far-field environment to the canister surface and from a canister breach to the far field.  To accomplish the review assignment, we (i) reviewed relevant...

  Innehållstyp: Publikationer

• 2013:20 Terrestrial Biosphere Modelling of C-14 Research

  time. However, because of its role in biological processes and its ecological cycling, the standard methods employed to model long-term radionuclide transport and accumulation in the biosphere cannot be ... 14C. In 2011, the Swedish Radiation Safety Authority (SSM) commissioned a study to develop a 14C model of the soil-plant-atmosphere system that would provide an independently modelling capability in order...

  Innehållstyp: Publikationer

• 2013:35 Technical Note, Rock Mechanics – Confidence of SKB’s models for predicting the occurrence of a damage zone around the excavations – Main Review Phase

  This assignment, performed at Southwest Research Institute, focusses on evaluating SKB’s assessment of potential occurrence of damaged rock zones (also referred to as excavation-damaged zone or EDZ) around ... around underground excavations at the site. This report presents the authors’ evaluation of SKB’s assessment in the specific area based on questions raised by SSM. The evaluation includes independent calculations...

  Innehållstyp: Publikationer

• 2013:33 Technical Note, Seismology – Frequencies and mechanisms. -Initial review phase

  construction and operation of a repository for spent nuclear fuel and for an encapsulation facility. As part of the review, SSM commissions consultants to carry out work in order to obtain information ... results from the consultants’ tasks are reported in SSM’s Technical Note series. This assignment is part of the review regarding the long-term evolution of the rock surrounding the repository. This assignment...

  Innehållstyp: Publikationer

• 2013:28 Brine intrusion by upconing for a high-level nuclear waste repository at Forsmark. Scoping calculations

  The objective of this study is to evaluate the possibility of salt-water migration to the spent nuclear repository. This objective is motivated by the adverse impacts of water with too high salinity entering ... entering the repository and by the uncertainty of the relevant hydraulic and hydrogeochemical conditions at the Forsmark site at great depths. To analyse density dependent flow and salt transport at the...

  Innehållstyp: Publikationer

• 2013:16 Technical Note, Assessment of PWR fuel depletion and of neutron multiplication factors for intact PWR fuel copper canisters – main review phase

  Kärnbränslehantering AB) in 2011 applied to the Swedish government for approval of a proposed solution for disposal of used fuel from Swedish nuclear power reactors and some relatively minor quantities of other fissile ... Note contains results of a recent review of the SKB methods used to determine the influence of reactor depletion on keff of intact PWR fuel in an intact PWR copper canister flooded with water. The review has...

  Innehållstyp: Publikationer

• 2013:27 Numerical simulations of headed anchors break in reinforced and non-reinforced concrete structures

  codes for anchorage of equipment in concrete structures have been developed since the time the Swedish power plants were designed. Furthermore, the design basis has been updated and in some cases new mechanical ... been added. As a consequence, it can be difficult for some anchorages to meet the requirements of today. In the design of anchorage equipment the beneficial effect of reinforcement was, in most cases, not...

  Innehållstyp: Publikationer

• 2013:26 Degradering av berg, förstärkningar och injektering i tunnlar

  Befintliga och planerade slutförvarsanläggningar för radioaktivt avfall kräver särskilda kunskaper för dess projektering och för att följa upp dess ... Skadorna beror väsentligen på vatteninläckage i bergrummen vilket börjar direkt efter utsprängning. Inläckaget kan leda till olika grader av degradering av berg, injekteringar och bergförstärkningar. Rinnande...

  Innehållstyp: Publikationer