Question 2 (50%): The loss of coolant occurs once per year for the reactor system shown in the figure below. Part a) Using the data given in the table below determine the frequency (occurrence per year) of runway scenario that may occur for the reactor system (reactor runway for this example is considered a rapid increase in pressure and temperature due to failure of protection layers in the table below). Part b) How much reduction in the frequency of unsafe outcomes it may attain if an automatic shutdown system (shut down the reactor if the reactor temperature exceeds the limit) with 0.10 probability of failure per demand (PFD) is added as an extra protection layer? Hint: Develop an event tree using protection layers in the table below and calculate the frequency of outcomes using PFD values for each protection layer. For Part b, revise the event tree by adding an extra protection layer. Reactor Feed Cooling Coils Cooling Water Out Cooling. Water In TIC TIA Reactor Temperature Controller Thermocouple Alarm at T>TA High temperature Alarm Figure Q2: Reactor with high-temperature alarm and temperature controller Table for Q2 System Failure/Demand Hardware safety function 0.02 Operator notice high temp 0.20 Operator restarting cooling system 0.30 Manual shut down the system 0.10