Ograničavanje posljedica akcidenata gubitka hladioca iz bazena za istrošeno gorivo korištenjem sprej mlaznica

master's thesis

• Title (english): Mitigation of Spent Fuel Pool Loss of Coolant Inventory Accidents Using Spray Nozzles
• Author: Josip Đaković
• Mentor: Davor Grgić (mentor)
• Committee member: Davor Grgić (predsjednik povjerenstva)
• Committee member: Nikola Čavlina (član povjerenstva)
• Committee member: Siniša Šadek (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2017-07-20, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Bazen za istrošeno gorivo nuklearne elektrane je robusna struktura, projektirana da izdrži velika seizmička naprezanja. Nakon terorističkih napada 11. rujna i akcidenta u nuklearnoj elektrani Fukushima, posebna pozornost je usmjerena na procjenu sigurnosti te donošenje mjera za ublažavanje eventualnih akcidenata vezanih s bazenom za istrošeno gorivo. Jedna od značajnijih mjera je ugradnja sprej mlaznica koje bi u slučaju akcidenta gubitka hladioca prolongirale ili spriječile pregrijavanje goriva te posljedično ispuštanje radioaktivnosti. U radu je modeliran bazen za istrošeno gorivo NE Krško i sustav sprej mlaznica, za koji postoje planovi implementacije. Procijenjena je efikasnost spreja u ograničavanju porasta temperature goriva za trenutnu konfiguraciju bazena. Proračuni su provedeni pomoću programskog koda MELCOR koji je razvijen za analize teških akcidenata u nuklearnim elektranama.

Abstract (english)

The Spent fuel pool is a robust structure designed to withstand large seismic loads. After the terrorist attacks on September 11 and the accident in the Fukushima nuclear power plant, special attention is focused on safety assessments and taking measures to mitigate possible accidents related to the spent fuel pool. One of the most important measures is the installation of spray nozzles which would, in the case of a loss of coolant inventory accident, prolong or prevent overheating of fuel and consequent radioactivity releases. In this thesis, spent fuel pool in NPP Krško was modeled together with spray nozzle system, for which implementation plans exists. The efficiency of the spray system was estimated in limiting the fuel temperature rise for current fuel storage configuration in the pool. The calculations were carried out using the MELCOR program code which was developed for the analysis of severe accidents in nuclear power plants.

• Keywords: Bazen za istrošeno gorivo; sprej mlaznice; NE Krško; akcident gubitka hladioca; MELCOR; ostatna toplina
• Keywords (english): Spent Fuel Pool; Spray Nozzles; NPP Krško; Loss of Coolant Accident; MELCOR; Decay Heat
• Language: croatian
• URN:NBN: urn:nbn:hr:168:755165
• 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: 2019-03-13 20:06:41