Mine surveillance measurements during the building of NOP II shaft

The Velenje Coal Mine is building a new shaft NOP II for the \ud transportation of coal from the mine. The entrance of the shaft, \ud which is determined on the surface, and the bottom of the \ud shaft, which is expected in the point determined at the bottom \ud of the shaft, must be within the same vertical and horizontal \ud coordinate system. The starting points for the measurements \ud are the points determined on the surface, which are stable \ud or have a determined direction and velocity. The transfer of \ud the coordinate system from the surface into the shaft can be \ud carried out with the measurements using various methods. \ud The results of the measurements and the calculations are the \ud coordinate points in the shaft that are in the same coordinate \ud system as those on the surface. They are very suitable for the \ud determination of the designed NOP II shaft. At the beginning \ud of this task, we planned to determine the coordinates of the \ud starting points with a maximum precision. Based on the \ud results of an analysis, we can conclude that we performed \ud each phase of the work very well and achieved the tasks set

Understanding the Role of Imide‐Based Salts and Borate‐Based Additives for Safe and High‐Performance Glyoxal‐Based Electrolytes in Ni‐Rich NMC811_{811} Cathodes for Li‐Ion Batteries

Herein, the design of novel and safe electrolyte formulations for high- voltage Ni-rich cathodes is reported. The solvent mixture comprising 1,1,2,2-tetraethoxyethane and propylene carbonate not only displays good transport properties, but also greatly enhances the overall safety of the cell thanks to its low flammability. The influence of the conducting salts, that is, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and lithium bis(fluorosulfonyl)imide (LiFSI), and of the additives lithium bis(oxalato)borate (LiBOB) and lithium difluoro(oxalato)borate (LiDFOB) is examined. Molecular dynamics simulations are carried out to gain insights into the local structure of the different electrolytes and the lithium-ion coordination. Furthermore, special emphasis is placed on the film-forming abilities of the salts to suppress the anodic dissolution of the aluminum current collector and to create a stable cathode electrolyte interphase (CEI). In this regard, the borate-based additives significantly alleviate the intrinsic challenges associated with the use of LiTFSI and LiFSI salts. It is worth remarking that a superior cathode performance is achieved by using the LiFSI/LiDFOB electrolyte, displaying a high specific capacity of 164 mAh g−1 at 6 C and ca. 95% capacity retention after 100 cycles at 1 C. This is attributed to the rich chemistry of the generated CEI layer, as confirmed by ex situ X-ray photoelectron spectroscopy

Ob koncu četrtega desetletja delovanja NE Krško

In this article, the influence of a controlled magnetic field on gadolinium plates was modelled and simulated to be used in magnetic refrigeration installations. This is a state-of-the-art technology that does not use refrigerants and does not work based on vapour compression, which is based on the operation of the magnetocaloric properties of the material usedin the case below, this material, in the form of a flat plate, has certain magnetocaloric properties and under the influence of magnetic induction can be used successfully in such innovative installations. The advantages of using gadolinium in the form of a flat plate in a magnetic regenerator and thermal energy dissipation on its surface under the controlled magnetic field\u27s influence were studied.V prispevku so predstavljene omejitve za radioaktivne izpuste iz Nuklearne elektrarne Krško, ki so z manjšimi spremembami v veljavi od začetka delovanja. Monitoring, ki se izvaja v okolici elektrarne, se ni bistveno spremenil od poznih osemdesetih let. Predstavljeni so zbrani podatki o radioaktivnosti v tekočinskih in atmosferskih izpustih. Zbrani podatki o ocenjenih dozah kažejo, da so skozi leta bili v uporabi različni pristopi ocenjevanju doz, vendar vsi dokazujejo, da so doze prebivalstva bile vedno bistveno manjše od avtoriziranih mejnih doz

Practical Demonstrations – Key to Efficient Explanations of Radioactivity to Pupils and Students

The radioactivity workshop and hands-on demonstrations in Milan Čopič Nuclear Training Centre enable us to effectively transfer some basic information about radioactivity, radiation and radiation effects to our young visitors. This activity has been well accepted and praised by teachers, who are aware of the subject importance for education

Practical Demonstrations – Key to Efficient Explanations of Radioactivity to Pupils and Students

The radioactivity workshop and hands-on demonstrations in Milan Čopič Nuclear Training Centre enable us to effectively transfer some basic information about radioactivity, radiation and radiation effects to our young visitors. This activity has been well accepted and praised by teachers, who are aware of the subject importance for education