Browsing Acta Polytechnica CTU Proceedings. 2018, vol. 19 by Title

Now showing items 2-7 of 7

    • MIXED CORE SUBCHANNEL MODEL FOR SUBCAL AND COUPLING WITH ANDREA 

      Author: Caha, Vojtěch; Čížek, Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      This paper presents the results of an analysis of flow distribution in VVER-1000 mixed core consisting of fuel assemblies with non-identical spacing grids. The calculation was carried out using the modified subchannel code ...

    • RESIDUAL HEAT POWER REMOVAL FROM SPENT NUCLEAR FUEL DURING DRY AND WET STORAGE 

      Author: Vlček, Daniel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      This project deals with the thermal analyses of the wet and dry storages of the spent nuclear fuel. The dry spent fuel storage sub-channel code COBRA-SFS has been used in order to calculate the temperature field. In this ...

    • SCALE AND SERPENT TWO-GROUP CROSS-SECTION DATA GENERATION 

      Author: Novák, Ondřej; Frýbort, Jan; Sklenka, Lubomír; Rataj, Jan; Chvála, Ondřej
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      In this work, VVER fuel assembly is calculated using two different codes - Serpent and SCALE. Multiplication factor and several two-group macroscopic parameters including scattering cross-section, fission cross-section, ...

    • SELECTION OF REFERENCE VALUE OF LONGITUDINAL TO TRANSVERSAL ULTRASONIC WAVES VELOCITY RATIO ON PRESSURE PURPOSE STEELS FOR DETECTION OF CREEP 

      Author: Zavadil, Tomáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Common degradation process for industrial equipment in power and petrochemical industry is creep. The ultrasonic waves velocities and their ratio can provide feedback on stress-strain conditions generated by heat. Selection ...

    • STUDY OF THERMAL CREEP OF COATED CLADDING MATERIALS 

      Author: Ševeček, Martin; Shirvan, Koroush; Ballinger, Ronald G.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Coated cladding materials are considered as a near-term concept for so-called Accident Tolerant Fuel materials. Their behavior in accidental conditions is mainly studied around the world, however, they need to survive ...

    • UNCERTAINTY EVALUATION IN CRITICALITY CALCULATIONS USING THE TSUNAMI METHODOLOGY 

      Author: Šikl, Matěj; Havlůj, František
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Procedure of criticality calculations and uncertainty evaluations currently has several insufficiencies which could lead to potential non–conservativeness. Paper discuss and describes possibilities of elimination of these ...