Operational Experience Data Analysis on Events Related to Maintenance at Nuclear Power Plants

Ballesteros, A.; Radian, Sanda; Maqua, Michael; Stephan, Jean-Luc

doi:10.13182/nse16-80

Cited by 4 publications

(2 citation statements)

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“…analisado. Uma análise indicando que as válvulas são os componentes mais afetados no conjunto de eventos analisados é mostrada em [11]. Componentes como "Tubos e dutos" aparecem em 8,9% dos relatórios analisados.…”

Section: Resultsunclassified

Estudo de eventos operacionais de reatores refrigerados e moderados à água leve pressurizada usando o banco de dados do IRS

Vital¹,

Vital²

2020

Braz. J. Rad. Sci.

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O conhecimento das características de eventos rotineiros em usinas nucleares permite o estabelecimento de ações para evitar a ocorrência, atendendo aos princípios de segurança nuclear cujo objetivo é proteger as pessoas e o meio ambiente dos riscos associados à atividade industrial. Nesse sentido, a existência de um mecanismo de trocas de informações entre organismos de diversas partes do mundo auxilia no processo de tomada de decisões. Com base nos princípios da cultura de segurança que propõe um aperfeiçoamento contínuo das práticas operacionais, este trabalho mostra os resultados de um levantamento realizado em 293 relatórios de eventos, registrados no IRS, de diversas usinas nucleares refrigeradas e moderadas à água leve pressurizada, segundo a codificação das suas características de acordo com o guia de referência. Dessa forma, o objetivo deste trabalho é identificar as principais características dos eventos que ocorreram no período de 2010 a 2019.

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Section: Resultsunclassified

Estudo de eventos operacionais de reatores refrigerados e moderados à água leve pressurizada usando o banco de dados do IRS

Vital¹,

Vital²

2020

Braz. J. Rad. Sci.

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“…The outage may take nearly one month, and for that period, it may be necessary to hire contract workers (or to second employees from the corporation's other plants) being the double of the regular workforce at the plant the temporary workforce is intended to supplement [73]. 11 Clearly, there is an incentive to have longer periods of operation between periods of shutdown for refueling (this is distinct from maintenance-related events [74,75], and related shutdown.) Fuel assemblies are about four metres long, of 179 to 264 cylindrical rods typically of uranium dioxide.…”

Section: Preliminary Notions In Nuclear Engineering Concerning Fuel mentioning

confidence: 99%

An Overview of AI Methods for in-Core Fuel Management: Tools for the Automatic Design of Nuclear Reactor Core Configurations for Fuel Reload, (Re)arranging New and Partly Spent Fuel

Nissan

2019

Designs

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An important aspect of managing a nuclear reactor is how to design refuellings, and from the 1980s to the present different artificial intelligence (AI) techniques have been applied to this problem. A section of the reactor core resembles a symmetrical grid; long fuel assemblies are inserted there, some of them new, some of them partly spent. Rods of “burnable poisons” dangle above, ready to be inserted into the core, in order to stop the reactor. Traditionally, manual design was made by shuffling positions in the grid heuristically, but AI enabled to automatically generate families of candidate configurations, under safety constraints, as well as in order to optimize combustion, with longer cycles of operation between shutdown periods, thus delaying the end-of-cycle point (except in France, where shutdown is on an annual basis, and Canada, where individual fuel assemblies are replaced, with no need for shutdown for rearranging the entire batch). Rule-based expert systems, the first being FUELCON,1 were succeeded by projects combining neural and rule-based processing (a symbolic-to-neural compilation of rules we did not implement), and later on, genetic algorithms in FUELGEN.2 In the literature, one also comes across the application of fuzzy techniques, tabu search, cellular automata and simulated annealing, as well as particle swarms. Safety regulations require simulating the results using a parameter prediction tool; this is done using either nodal algorithms, or neural processing.

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An integrated framework for analysing operational events in China nuclear power plants

Zou

Wang

Zio

et al. 2019

Annals of Nuclear Energy

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Operational Experience Data Analysis on Events Related to Maintenance at Nuclear Power Plants

Cited by 4 publications

References 0 publications

Estudo de eventos operacionais de reatores refrigerados e moderados à água leve pressurizada usando o banco de dados do IRS

Estudo de eventos operacionais de reatores refrigerados e moderados à água leve pressurizada usando o banco de dados do IRS

An Overview of AI Methods for in-Core Fuel Management: Tools for the Automatic Design of Nuclear Reactor Core Configurations for Fuel Reload, (Re)arranging New and Partly Spent Fuel

An integrated framework for analysing operational events in China nuclear power plants

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