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Title:Varnost in zanesljivost čistilne naprave
Authors:ID Fras, Matjaž (Author)
ID Marn, Jure (Mentor) More about this mentor... New window
ID Samec, Niko (Comentor)
Files:.pdf MAG_Fras_Matjaz_2016.pdf (9,02 MB)
MD5: 539FBE22846D085D73FAF95598F89398
 
Language:Slovenian
Work type:Master's thesis
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:V okviru magistrskega dela smo kvantitativno določevali verjetnosti zanesljivosti sistema (tehnična odpoved / napaka) in verjetnosti nastanka človeških odpovedi / napak (človeške nezanesljivosti) na obravnavanem primeru čistilne naprave (ČN), pri čemer je bil poudarek na slednjih. Verjetnosti tehničnih in človeških napak smo analizirali na podlagi dveh spektrov t.j. Trenutne in Kontinuirane odpovedi ČN. Za določevanje tehničnih odpovedi smo uporabili metodo Analize drevesa odpovedi (FTA), ki je pokazala, da je verjetnost tehnične napake pri Kontinuirani odpovedi veliko večja kot pri Trenutni odpovedi. Verjetnost pojava pojava človeške napake smo analizirali s pomočjo dveh metod Analize človeške zanesljivosti druge generacije. Ker je bila verjetnost človeške napake za celotno čistilno napravo po Osnovni metodi kognitivne zanesljivosti in analize odpovedi (Osnovna CREAM metoda) večja od ugotovljene verjetnosti tehnične napake, smo nadaljevali z Razširjeno CREAM metodo, kjer smo določali verjetnosti napake za vsako posamezno akcijo oz. napako operaterja ČN. Na osnovi pridobljenih rezultatov verjetnosti tehnične in človeške napake smo izvedli sintezo rezultatov obeh analiz ter tako kvantitativno ugotovili vpliv verjetnosti človeške napake glede na celotno verjetnost napake (v primeru Trenutne odpovedi slednja predstavlja kar 85% glede na celotno zanesljivost ČN (Kontinuirana odpoved 39%)). Izvedena analiza varnosti in zanesljivosti čistilne naprave predstavlja uporaben primer, metodologijo ali orodje, s katerim lahko upravljalci ČN (predvsem malih komunalnih čistilnih naprav z zmogljivostjo čiščenja, manjšo od 2000 populacijskih ekvivalentov) na sorazmerno hiter in učinkovit način ugotavljajo verjetnosti nastanka napak ter na osnovi slednjih pripravijo ukrepe preprečevanja le teh.
Keywords:čistilna naprava, verjetnost, odpoved, zanesljivost sistema, tehnična napaka, človeška zanesljivost, človeška napaka, analiza drevesa odpovedi, metoda kognitivne zanesljivosti in analize odpovedi
Place of publishing:Maribor
Publisher:[M. Fras]
Year of publishing:2016
PID:20.500.12556/DKUM-60004 New window
UDC:519.248:628.32(043.2)
COBISS.SI-ID:20166934 New window
NUK URN:URN:SI:UM:DK:SXVFZUJ1
Publication date in DKUM:27.09.2016
Views:1994
Downloads:198
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Secondary language

Language:English
Title:Safety and reliability of the wastewater treatment plant
Abstract:In the context of the master's thesis we were quantitatively analysing the probabilities of the system reliability (technical failure / error) and the probabilities of human failure / error (human reliability) on the presented wastewater treatment plant (WWTP) case, with the emphasis on the latter. The probabilities of a technical and human errors were analyzed on the basis of the two spectra's i.e. Current and Continued failure of the WWTP. For the determination of the technical failure, we've used the method of Fault Tree Analysis (FTA), which showed that the probability of a technical error in the Continued failure is much higher than in the Current failure. The probability of an human error occurrence were analyzed using two methods of an Human Reliability Analysis - second generation. As the probability of human error for the entire WWTP, according to the Basic Cognitive Reliability and Error Analysis Method (basic CREAM method) was higher than recognised probability of technical error, we continued with the Extended CREAM method, where we've determined the error probabilities for each WTTP operator action. Based on the obtained results of technical and human error probabilities, we've performed the results synthesis of both analyzes and quantitatively determined the probability impact of the human error in relation to the overall probability error (in the case of Current failure it represents a high, 85% of total reliability of the WWTP (Continued failure 39%)). A performed analysis of the safety and reliability of the wastewater treatment plant represents an useful example, methodology or tool for WWTP operator's (mostly for small WWTP's with a treatment capacity of less than 2000 population equivalents), with which they can at a relatively fast and efficient way determine the error probabilities and develop measures for the prevention of them.
Keywords:wastewater treatment plant, probability, failure, system reliability, technical error, human reliability, human error, Fault Tree Analysis, Cognitive Reliabilitv and Error Analvsis Method


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