Analysis of the loss of reactor coolant flow using the MELCOR code

Simulacija MELCOR-om nam daje rezultate koji nam daju uvid kako napreduje teška nesreća u slučaju odsutnosti napajanja bilo kakve vrste. Ovaj slučaj se konkretno zove SBO slučaj ili Station Blackout. Ovi su rezultati napravljeni za nuklearnu elektranu Krško PWR tipa. Tijekom nesreće dolazi do taljenja jezgre, degradacije, relokacije, oksidacije i proizvodnje vodika. U ovom radu smo imali dva slučaja curenja na brtvi. Do ove rupe je došlo zato što pomoćna pumpa koja hladi tu brtvu ostaje bez napajanja. Curenje na ovoj brtvi eventualno dovodi do nestanka rashladnog fluida u reaktorskoj posudi, poznato pod akronimom LOCA ili loss of coolant accident. Jedan slučaj je bio kada je rupa na brtvi manja drugi slučaj kada je veća. Usporedili smo ova dva slučaja i naveli razlike i sličnosti ova dva slučaja.With a MELCOR simulation we have gotten resaults which were necessary to analyze how a severe accident progresses through time when there is a total loss of power. More specificly this situation is known as SBO or Station Blackout. These resault were made for the PWR nuclear power plant Krško. During the accident there is core melting, degradation, relocation, oxidation and hydrogen generaation. This papper analyzed two seal failures. The seal failure came about because the pump responsible for cooling the seal is unpowered. One case was a smaller hole on the seal the other was a bigger hole on the seal. The seal failure leads to the eventual loss of cooler fluid in the reactor vessel, also known as loss of coolant accident or LOCA for short. We compared these two cases and listed similarities and diffrences between these two cases