20.500.12556/DKUM-42983 VARNOST SISTEMA ZA ČIŠČENJE KONDENZATA SAFETY OF CONDENSATE POLISHING SYSTEM V diplomskem delu smo obravnavali obrat čiščenja kondenzata, ki se nahaja v sekundarnem delu Nuklearne elektrarne Krško (NEK). Zaradi kontaminacije vode v posameznih delih procesa je potrebno čiščenje kondenzatne vode. Kemijsko čiščenje kondenzatne vode poteka z uporabo ionskih izmenjevalcev. Regeneracija le-teh poteka v regeneracijskih posodah s prečrpavanjem kemikalij HCl in NaOH iz rezervoarjev. Nezaželeni obratovalni pogoji lahko negativno vplivajo na procesno opremo, jo poškodujejo in povzročijo nevarnost za zaposlene. V delu smo izvedli analizo varnosti procesa regeneracije ionske smole v sistemu za čiščenje kondenzata v NEK. Uporabili smo metodo HAZOP, ki identificira nevarnosti v sistemu. Z izvedbo te študije smo predvideli možne scenarije in opisali njihove posledice. Na tej osnovi smo skonstruirali drevo dogodkov in drevo odpovedi. Slednji predstavljata zaporedja vzrokov in neželenih dogodkov, ki lahko privedejo do nesreč. Ob tem smo izvedli kvantitativno vrednotenje pogostosti nevarnega dogodka. Prikazan je preračun masnega pretoka pri iztekanju nevarne kemikalije NaOH iz rezervoarja. The subject of this diploma thesis is the plant for polishing the condensate water which is located in the secondary part of the Krško Nuclear Power Plant (NEK). It is necessary to clean the condensate water due to its contamination within various parts of the process. Chemical polishing of condensate water is accomplished by using ion exchangers. Regeneration of those is performed in the regenerating tanks by pumping the chemicals HCl and NaOH from the reservoirs. Undesirable operating conditions may negatively affect the process equipment, cause its damage and widespread danger to staff. In this diploma work, the safety analysis of process for ion resins regeneration within the condensate polishing system in the NEK was accomplished. The HAZOP method was used for identification of process hazards. By conducting this study, we have predicted possible scenarios and described their consequences. On the basis of the previous methods, we constructed the event tree and the fault tree. They represented a sequences of causes and negative events that could lead to an accident. A quantitative evaluation of hazardous event frequency was also performed. The mass flow rate of NaOH leaking from the tank was calculated. varnost nuklearna elektrarna čiščenje kondenzatne vode metoda HAZOP drevo odpovedi drevo dogodkov. safety nuclear power plant polishing condensate water HAZOP method event tree fault tree. true true false [D. Kodrič] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2013-11-11 15:53:16 2013-11-29 14:41:31 2022-05-08 03:07:14 2021-04-28 03:12:54 2013 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 66.012:331.45(043.2) 17452054 URN:SI:UM:DK:XYE74CVA VS_Kodric_Domen_2013.pdf VS_Kodric_Domen_2013.pdf 1 A21151459DBBD5144E65795741D2040B e01fff99558ed6ff07a9fd08dcda6168b59e744bb6df902115bb8f1a613b7602 8c1e4602-7c0a-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=60692 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0