Single-phase Coolant Flow and Heat Transfer
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چکیده
1) Hydraulic Analysis of the Emergency Core Spray System in a BWR The emergency spray system of a BWR delivers cold water to the core after a large-break loss of coolant accident has emptied the reactor vessel. The system comprises a large water pool, a pump, a spray nozzle and connecting pipes (Figure 1). All pipes are smooth round tubes made of stainless steel with 10 cm internal diameter. The pipe lengths are shown in Figure 1. Two sharp 90 elbows connect the vertical pipe to the horizontal pipe and the horizontal pipe to the spray nozzle. Each elbow has a form loss coefficient of 0.9. The spray nozzle has a total flow area of 26 cm and a form loss coefficient of 15. The suction pipe in the pool has a sharp edged entrance with a form loss coefficient of 0.5.
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