Kvantifikacija neodređenosti rezultata simulacije eksperimenta QUENCH-02 s programom ASYST

master's thesis

• Title (english): Uncertainty quantification of the QUENCH-02 experiment simulation results with the ASYST code
• Author: Renato Pavlinac
• Mentor: Siniša Šadek (mentor)
• Committee member: Siniša Šadek (predsjednik povjerenstva)
• Committee member: Krešimir Trontl (član povjerenstva)
• Committee member: Ninoslav Holjevac (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2022-09-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U nastojanju da se precizno odredi razina sigurnosti nuklearnog postrojenja važno je odrediti neodređenosti unesene u procjenu djelovanjem slučajnih vrijednosti varijabli koje opisuju sustav te njegove početne i rubne uvjete. Neodređenost je unesena i nesavršenošću računalnih fizikalnih modela koji se koriste u komercijalnim programima za procjenu rizika i analizu sigurnosti nuklearnih postrojenja. Program ASYST omogućava korisniku da pomoću ugrađenog programskog paketa varira ulazne podatke i određuje interval i razinu pouzdanosti krajnjih rezultata simulacije. S obzirom na navedena svojstva program ASYST korišten je u ovom radu za dobivanje rezultata kojima se jamči pokrivenost minimalno 90% ishoda, a koji je temeljen na eksperimentu QUENCH-02. Dodatno je kvantificirana i mjera utjecaja najvažnijih ulaznih parametara na vrijednosti izlaznih varijabli.

Abstract (english)

To precisely determine the level of safety of a nuclear facility, it is important to determine the uncertainties introduced into the assessment by the action of random values of the variables that describe the system and its initial and boundary conditions. Uncertainty is also introduced by the imperfection of computer physical models used in commercial programs for risk assessment and safety analysis of nuclear facilities. The ASYST program allows the user to use the built-in software package to vary the input data and determine the interval and reliability level of the simulation results. Regarding the mentioned properties, the ASYST program was used in this paper to obtain results that guarantee the coverage of the minimally 95% of the results, which is based on the QUENCH-02 experiment. Additionally, the measure of influence of the most important input parameters on the values of the results was quantified.

• Keywords: neodređenost; ASYST; QUENCH-02; potapanje reaktora; RELAP5/SCDAPSIM
• Keywords (english): uncertainty; ASYST; QUENCH-02; quenching; RELAP5/SCDAPSIM
• Language: croatian
• URN:NBN: urn:nbn:hr:168:229320
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-14 21:22:54