Paskaduuniblues

Kirjallisuusarvostelu

Poimulehtien vuoro Euroopan kasviatlaksessa

Kirjallisuusarvostelu

Seikkaillen kohti sukupuuttoa

Kirjallisuusarvostelu

Yhteiskuntien monipuolinen ympäristösuhde

Kirjallisuusarvostelu

Modernisoitu Moby Dick?

Kirjallisuusarvostelu

Instituution synty, kasvu ja avoin tulevaisuus

Kirjallisuusarvostelu

Oikeuserehdys sopimusoikeudellisena ongelmana

Lectio praecursoria Helsingin yliopisto 12.3.2010.

Uutta viiniä vanhoista leileistä

Kirjallisuusarvostelu

Mediassa monille : välineen, aineksen ja elinympäristön ilmentymistä olemuksina

Kirjallisuusarvostelu

Improving the calculation of rate of stratification in APROS

APROS (Advanced Process Simulation Environment) is a computer simulation program developed to simulate thermal hydraulic processes in nuclear and conventional power plants. Earlier research at VTT Technological Research Centre of Finland had found the current version of APROS to produce inaccurate simulation results for a certain case of loop seal clearing. The objective of this Master’s thesis is to find and implement an alternative method for calculating the rate of stratification in APROS, which was found to be the reason for the inaccuracies. Brief literature study was performed and a promising candidate for the new method was found. The new method was implemented into APROS and tested against experiments and simulations from two test facilities and the current version of APROS. Simulation results with the new version were partially conflicting; in some cases the new method was more accurate than the current version, in some the current method was better. Overall, the new method can be assessed as an improvement.