安全评价师培训教程(一)原来.pptVIP

Safety training professional ability Safety training-2013 Safety training--Event Tree Analysis BIT：Safety science and engineering Tree Li Safety training-2013 Event Tree Analysis 1、The concept of event tree 2、The concept of event tree3、Typical cases4、Conclusion Safety training professional ability Safety training-2013 Safety training professional ability 1、The concept of event tree Starting from the initial state of the event, according to the development order of accident, divided into stages, step by step, every step from success events and failure events two possible consequences into consideration, and use the attachment for success, the connection failure, until the final result。 Safety training-2013 Safety training professional ability 2、Event tree analysis steps （1）Determine the system and its components； （2）Analysis of each subsystem； （3）Prepare the event tree； （4）Quantitative calculation； Safety training-2013 Safety training professional ability 3、Typical cases Frozen brine flow reactor to reduce event tree analysis The reaction is exothermic, therefore in the jacketed reactor into the frozen brine to remove heat of reaction。If frozen brine flow rate reduce, can make the reactor temperature rise, reaction speed, so that the reaction is out of control。There are installed in the reactor a temperature measurement control system, and with the frozen brine inlet valve connection, according to the temperature control of frozen brine flow rate。 Safety training-2013 Safety training professional ability 3、Typical cases Each event failure rate： 0.1 0.25 0.25 0.01 Failure rate Emergency shut down the reactor Restore the coolant flow rate Found the reactor overtemperature High temperature alarming device alarm Safety function E D C B Safety training-2013 A Frozen brine flow rate to decrease B High temperature alarming device alarm B^High temperature alarming device did not report D Restore the coolant flow rate ①Continue to opera