Pressurizer Modeling Using TRACE code

Zadatak završnog rada bio je modelirati tlačnik programom TRACE. Najprije je trebalo prikupiti svu potrebnu dokumentaciju i ulazne parametre za model, zatim izraditi model korištenjem SNAP programskog paketa te simulirati odzive pomoću TRACE-a za dvije specifične situacije u kojima radi tlačnik – slučaj zagrijavanja (insurge) i hlađenja (outsurge) primarnog kruga. U prvom poglavlju opisana je uloga i način rada tlačnika u nuklearnoj elektrani, kao i njegovi osnovni dijelovi. Drugo poglavlje se bavi općenito programom TRACE, načinom njegova funkcioniranja te nekim važnim karakteristikama. Treće poglavlje ukratko opisuje postupak izrade modela i pripreme ulaznih podataka. Četvrto poglavlje navodi rezultate simulacije izrađenog modela, te ih uspoređuje s rezultatima dobivenim nekim ranijim simulacijama istog modela, simuliranog pomoću drugog programa, RELAP5. Nakon toga slijedi prikaz tranzijentnog odziva za slučaj zagrijavanja i hlađenja. Završni rad zaključen je kratkim opisom rezultata, kao i zaključcima koji su iz njih izvedeni.The task of the final thesis was to model a pressurizer using TRACE code. First, it was necessary to collect the required documentation and input parameters for the model, then create a model using the SNAP program package and simulate responses using TRACE for two specific situations in which the pressurizer operates - the case of heating (insurge) and cooling (outsurge) of the primary circuit. The first chapter describes the function and operation of a nuclear power plant pressurizer, as well as its basic components. The second chapter deals with TRACE code in general, the way of its functioning and some important features. The third section briefly describes the process of creating the model and preparation of input data. The fourth chapter lists the results of model simulations and compares them with the results obtained by previous simulations of the same model, simulated by using another program, RELAP5. This is followed by the presentation of the transient response for the case of primary system heating and cooling. Final work is concluded with a short description of the results, as well as the conclusions that were derived from them