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- Bubelis, E., et al.
(author)
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System codes benchmarking on a low sodium void effect SFR heterogeneous core under ULOF conditions
- 2017
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In: Nuclear Engineering and Design. - : Elsevier. - 0029-5493 .- 1872-759X. ; 320, s. 325-345
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Journal article (peer-reviewed)abstract
- This paper discusses system codes benchmarking activities on an ASTRID-like heterogeneous fast core under a representative design basis accident condition: the unprotected loss of flow accident (ULOF). The paper provides evidence that all the system codes used in this exercise are capable to simulate the transient behavior of heterogeneous SFR cores up to the initiation of sodium boiling. As a proof of this, a comparison of steady-state results and dynamic simulation results for a ULOF transient (simulated using system codes in combination with neutron point kinetics) are provided and discussed in this paper. The paper contains a brief description of the system codes (TRACE, CATHARE, SIM-SFR, SAS-SFR, ATHLET, SPECTRA, SAS4A) used by the participants (PSI, CEA, EDF, KIT, GRS, UPVLC, NRG, KTH), assumptions made during the simulations, as well as results obtained.
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| 2. |
- Mikityuk, K., et al.
(author)
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Horizon-2020 ESFR-SMART project on Sodium Fast Reactor Safety: status after 18 months
- 2019
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Conference paper (other academic/artistic)abstract
- To improve the public acceptance of the future nuclear power in Europe we have to demonstrate that the new reactors have significantly higher safety level compared to traditional reactors. The ESFR-SMART project (European Sodium Fast Reactor Safety Measures Assessment and Research Tools) aims at enhancing further the safety of Generation-IV SFRs and in particular of the commercial-size European Sodium Fast Reactor (ESFR) in accordance with the European Sustainable Nuclear Industrial Initiative (ESNII) roadmap and in close cooperation with the Advanced Sodium Technological Reactor for Industrial Demonstration (ASTRID) program. The project aims at 5 specific objectives: 1. Produce new experimental data in order to support calibration and validation of the computational tools for each defence-in-depth level. 2. Test and qualify new instrumentations in order to support their utilization in the reactor protection system. 3. Perform further calibration and validation of the computational tools for each defence-in-depth level in order to support safety assessments of Generation-IV SFRs, using the data produced in the project as well as selected legacy data. 4. Select, implement and assess new safety measures for the commercial-size ESFR, using the GIF methodologies, the FP7 CP-ESFR project legacy, the calibrated and validated codes and being in accordance with the update of the European and international safety frameworks taking into account the Fukushima accident. 5. Strengthen and link together new networks, in particular, the network of the European sodium facilities and the network of the European students working on the SFR technology. By addressing the industry, policy makers and general public, the project is expected to make a meaningful impact on economics, environment, EU policy and society. Selected results and milestones achieved during the first eighteen months of the project will be briefly presented, including − proposal of new safety measures for ESFR; − evaluation of ESFR core performance; − benchmarking of codes; − experimental programs; and − education and training.
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| 3. |
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A Beginner's Guide to Swedish Academia
- 2022
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Editorial collection (other academic/artistic)abstract
- As new to the Swedish research system, one is faced with a series of questions, about what applies to qualifications, what the networks look like, but also practical issues. To make things easier, YAS has developed a guide for international researchers, to help navigate Swedish academia and remove time-consuming obstacles.
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| 4. |
- Dintica, Christina S., et al.
(author)
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Impaired olfaction is associated with cognitive decline and neurodegeneration in the brain
- 2019
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In: Neurology. - 0028-3878 .- 1526-632X. ; 92:7, s. e700-e709
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Journal article (peer-reviewed)abstract
- ObjectiveWe aimed to examine whether impaired olfaction is associated with cognitive decline and indicators of neurodegeneration in the brain of dementia-free older adults.MethodsWithin the Rush Memory and Aging Project, 380 dementia-free participants (mean age = 78 years) were followed for up to 15 years, and underwent MRI scans. Olfactory function was assessed using the Brief Smell Identification Test (B-SIT) at baseline, and categorized as anosmia (B-SIT <6), hyposmia (B-SIT 6-10 in men and 6-10.25 in women), and normal (B-SIT 10.25-12 in men and 10.5-12 in women). Cognitive function was annually assessed with a battery of 21 tests, from which composite scores were derived. Structural total and regional brain volumes were estimated. Data were analyzed using linear regression and mixed-effects models.ResultsAt study entry, 138 (36.3%) had normal olfactory function, 213 (56.1%) had hyposmia, and 29 (7.6%) had anosmia. In multiadjusted mixed-effects models, hyposmia (beta = -0.03, 95% confidence interval [CI] -0.05 to -0.02) and anosmia (beta = -0.13, 95% CI -0.16 to -0.09) were associated with faster rate of cognitive decline compared to normal olfaction. On MRI, impaired olfaction (hyposmia or anosmia) was related to smaller volumes of the hippocampus (beta = -0.19, 95% CI -0.33 to -0.05), and in the entorhinal (beta = -0.16, 95% CI -0.24 to -0.08), fusiform (beta = -0.45, 95% CI -0.78 to -0.14), and middle temporal (beta = -0.38, 95% CI -0.72 to -0.01) cortices.ConclusionImpaired olfaction predicts faster cognitive decline and might indicate neurodegeneration in the brain among dementia-free older adults.
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