Hazard assessment of hot water boiler at thermal power plant

Abstract

Our world and every person require a huge amount of energy, both electric and thermal, which are produced mainly at various types of power plants, but mostly on thermal. During the production of electricity and heat at the thermal power plants different potential hazards are occurring: chemical, environmental, fire or explosion. In accordance with the identified hazards on thermal power plants, possible six emergency situation scenarios are suggested. The failure tree method was used for determining the potential danger of a hot water boiler being one of the elements of thermal power plant. Given the conditional probabilities of events, it is obtained that the failure of the hot water boiler is possible. For reducing the probability of failure and improving the hot water boiler safety – safety barriers (functional and symbolic) are proposed. After the safety barriers are inserted, the probability of a hot water boiler failure in our case is almost incredible. Many people live near thermal power plants, which may have a potential risk of harm to their health. An approach for determining the potential risk indicator of the health harm (R) near thermal power plants is proposed. It is provides the division of risk levels into four classes: extremely high degree of potential hazard – R>0.1; high degree of potential hazard – 0.1>R>0.001; average degree of potential hazard – 10−3>R>10−5; low degree of potential hazard – R>10−5.