Search results for "risk priority number"

showing 4 items of 4 documents

Fuzzy FMECA analysis of radioactive gas recovery system in the SPES experimental facility

2021

Abstract Selective Production of Exotic Species is an innovative plant for advanced nuclear physic studies. A radioactive beam, generated by using an UCx target-ion source system, is ionized, selected and accelerated for experimental objects. Very high vacuum conditions and appropriate safety systems to storage exhaust gases are required to avoid radiological risk for operators and people. In this paper, Failure Mode, Effects, and Criticality Analysis of a preliminary design of high activity gas recovery system is performed by using a modified Fuzzy Risk Priority Number to rank the most critical components in terms of failures and human errors. Comparisons between fuzzy approach and classic…

Computer scienceSPES FMECA Fuzzy Risk Priority Number evidence theory exhaust gas storage system020209 energySystem safety02 engineering and technologyFuzzy logicFuzzy risk priority numberPriority Number030218 nuclear medicine & medical imaging03 medical and health sciences0302 clinical medicine0202 electrical engineering electronic engineering information engineeringSettore ING-IND/19 - Impianti NucleariRank (computer programming)TK9001-9401SPESExhaust gas storage systemReliability engineeringEvidence theoryFailure mode effects and criticality analysisNuclear Energy and EngineeringNuclear engineering. Atomic powerRisk assessmentFailure mode and effects analysisRadioactive gasFMECANuclear Engineering and Technology
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Risk assessment of component failure modes and human errors using a new FMECA approach: application in the safety analysis of HDR brachytherapy

2014

Failure mode, effects and criticality analysis (FMECA) is a safety technique extensively used in many different industrial fields to identify and prevent potential failures. In the application of traditional FMECA, the risk priority number (RPN) is determined to rank the failure modes; however, the method has been criticised for having several weaknesses. Moreover, it is unable to adequately deal with human errors or negligence. In this paper, a new versatile fuzzy rule-based assessment model is proposed to evaluate the RPN index to rank both component failure and human error. The proposed methodology is applied to potential radiological over-exposure of patients during high-dose-rate brach…

HDR brachytherapySafety ManagementComputer sciencemedicine.medical_treatmentBrachytherapyHuman errorBrachytherapyRisk AssessmentRadiation ProtectionComponent (UML)medicineHumansComputer SimulationRadiation InjuriesWaste Management and Disposalhuman errorSettore ING-IND/19 - Impianti Nuclearirisk priority numberModels StatisticalFuzzy ruleMedical ErrorsIncidenceRank (computer programming)Public Health Environmental and Occupational HealthGeneral MedicineReliability engineeringEquipment Failure AnalysisSurvival RateFailure mode effects and criticality analysisEquipment FailurePatient Safetyfuzzy logicRadioactive Hazard ReleaseRisk assessmentFailure mode and effects analysisFMECA
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Safety study of an LNG regasification plant using an FMECA and HAZOP integrated methodology

2015

Abstract A safety analysis was performed to determine possible accidental events in the storage system used in the liquefied natural gas regasification plant using the integrated application of failure modes, effects and criticality analysis (FMECA) and hazard and operability analysis (HAZOP) methodologies. The goal of the FMECA technique is the estimation of component failure modes and their major effects, whereas HAZOP is a structured and systematic technique that provides an identification of the hazards and the operability problems using logical sequences of cause-deviation-consequence of process parameters. The proposed FMECA and HAZOP integrated analysis (FHIA) has been designed as a …

Hazard (logic)EngineeringOperabilityHazard and operability studyGeneral Chemical EngineeringEnergy Engineering and Power TechnologyManagement Science and Operations ResearchIndustrial and Manufacturing EngineeringRisk analysiRisk analysis (business)Human errorSettore ING-IND/10 - Fisica Tecnica IndustrialeSafety Risk Reliability and QualitySettore ING-IND/19 - Impianti NucleariRegasificationbusiness.industryReliability engineeringFailure mode effects and criticality analysisControl and Systems EngineeringSystems engineeringLNGHAZOPRisk priority numberbusinessFailure mode and effects analysisRegasification terminalFood ScienceLiquefied natural gasFMECA
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FMECA Application in Tomotherapy: Comparison between Classic and Fuzzy Methodologies

2022

Accident analysis in radiotherapy highlighted the need to increase quality assurance (QA) programs by the identification of failures/errors with very low probability (rare event) but very severe consequences. In this field, a Failure Mode, Effects and Criticality Analysis (FMECA) technique, used in various industrial processes to rank critical events, has been met with much interest. The literature describes different FMECA methods; however, it is necessary to understand if these tools are incisive and effective in the healthcare sector. In this work, comparisons of FMECA methodologies in the risk assessment of patients undergoing treatments performed with helical tomotherapy are reported. …

risk assessment; FMEA; FMECA; radiotherapy; health physics; fuzzy risk priority numberRenewable Energy Sustainability and the Environmentfuzzy risk priority numberEcology Evolution Behavior and SystematicsFMEAradiotherapySettore ING-IND/19 - Impianti NucleariGeneral Environmental ScienceRisk assessmentFMECAhealth physics
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