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master's thesis
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Analysis of core bypass flow conversion influence on transeint behavior of NPP Krško
Štefica Vlahović (2015)
University of Zagreb
Faculty of Electrical Engineering and Computing
Metadata
TitleAnaliza utjecaja promjene smjera strujanja obilaznog protoka jezgre na tranzijetno ponašanje NE Krško
AuthorŠtefica Vlahović
Mentor(s)Davor Grgić (thesis advisor)
Abstract
U radu je objašnjen način pripreme ulaznih podataka za program RELAP5 zbog promjene smjera protoka rashladnog sredstva u regiji unutrašnja posuda-plašt jezgre. Korišteni su podaci za 27. ciklus izgaranja Nuklearne elektrane Krško, te su proračuni provedeni za akcident loma glavnog parovoda i za akcident izvlačenja kontrolne banke dok je reaktor na snazi za brzine izvlačenje 2.4 pcm/s i 80 pcm/s. Modifikacijom je smanjena razlika tlaka na plaštu jezgre i mogućnost oštećenja goriva zbog vibracija. Grafički su prikazani osnovni rezultati proračuna za oba akcidenta za stanje prije i poslije modifikacije. Pokazano je da su svi osnovni parametri (tlak, temperatura) ostali nepromijenjeni, te da je došlo do minimalnih promjena u iznosima obilaznih protoka.
Keywordscore bypass flow upflow conversion in reactor vessel barrel-baffle region RELAP5 Main steam line break Rod withdrawal at power
Parallel title (English)Analysis of core bypass flow conversion influence on transeint behavior of NPP Krško
Committee MembersŽeljko Tomšić (committee chairperson)
Davor Grgić (committee chairperson)
Vesna Bukarica (committee member)
Nikola Čavlina (committee member)
Siniša Šadek (committee member)
Zdenko Šimić (committee member)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
PlaceZagreb
StateCroatia
Scientific field, discipline, subdisciplineTECHNICAL SCIENCES
Computing
Study programme typeuniversity
Study levelgraduate
Study programmeElectrical Engineering and Information Technology
Academic title abbreviationmag. ing. el. techn. inf.
Genremaster's thesis
Language Croatian
Defense date2015-07-03
Parallel abstract (English)
The thesis explains the method of preparation input data for RELAP5 due to changes in the flow direction of coolant in the reactor pressure vessel barrel-baffle region. Program uses data for 27th cycle of Nuclear power plant Krško. Calculations are performed for the accident Main steam line break and Rod withdrawal at power for speed withdrawal of 2.4 pcm/s and 80 pcm/s. Upflow conversion reduced differential pressure across the baffle and possibility of fuel damage done by flow induced vibration. The main results of the calculation for both accidents are shown graphicly. It has been demonstrated that the basic parameters (pressure, temperatures) stay unchanged and that there was a little change in the flow rates (core flow and bypass flows).
Parallel keywords (Croatian)obilazni protok jezgre promjena smjera protoka u regiji reaktorske posude unutrašnja posuda-plašt jezgre RELAP5 lom glavnog parovoda izvlačenje kontrolne banke dok je reaktor na snazi
Resource typetext
Access conditionNo public access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:168:078083