The steam generator of a PWR is operating at 6.55 MPa (950 psia). Due to a sudden plant trip, the atmospheric dump valve opens (ADV) to discharge steam. Find the steam flow rate through the ADV. The...

The steam generator of a PWR is operating at 6.55 MPa (950 psia). Due to a sudden plant trip, the
atmospheric dump valve
opens (ADV) to discharge steam. Find the steam flow rate through the ADV. The valve flow area is 40.88 cm²
(0.044 ft²). The valve discharge coefficient is 0.61.

A pressure vessel is filled with pressurized saturated steam. A small valve is opened to vent the vessel. Find the vessel pressure after 30 s. Data:
P
₁
= 1000 psia, V = 100 ft³,
D_Valve

= 1 inch, (C_d
)
_Valve

= 0.65.