Engineering

A reactor operates at a thermal power of 1000 MW for one year. Calculate the power from decay heat after: a) 1 day following shutdown b) 1 month following shutdown c) 1 year following shutdown d) Repeat the three calculations assuming only one month of operation before shutdown and compare the results.

A reactor operates at a thermal power of 1000 MW for one year. Calculate the power from decay heat after:a) 1 day following shutdownb) 1 month following shutdownc) 1 year following shutdownd) Repeat the three calculations assuming only one month of operation before shutdown and compare the results. EXPERT ANSWER

Problem #1. Calculate the pumping power under ideal steady-state operating conditions for a typical PWR reactor-coolant system using only the following operating conditions: • Core power – 3411 MWt • ATco – 33.7 °C (Coolant temperature difference between core in and outlet) • Tin – 293 C (Coolant temperature at core inlet) . p=15.5 MPa (Coolant pressure) • Reactor-coolant system pressure drop = 778 kPa Pump efficiency – 85% • Energy balance equation for single phase fluid flow: 0 = CAT,, where 0,5, , and 47, are the heat transfer rate, fluid mass flow rate, specific heat of the fluid, and temperature difference between the fluid inlet and outlet. Solution) TABLE 8.14 (continued) Compressed Liquid Water Temp. (C) (kJ/kg-K) (kJ/kg-K) Sat

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A 3-m-wide, 8-m-high rectangular gate is located at the end of a rectangular passage that is connected to a large open tank filled with water as shown in the figure. The gate is hinged at its bottom and held closed by a horizontal force, FH, located at the center of the gate. The maximum value for FH is 3500 kN. Determine the maximum water depth, h, above the center of the gate that can exist without the gate opening.

A 3-m-wide, 8-m-high rectangular gate is located at the end of a rectangular passage that is connected to a large open tank filled with water as shown in the figure. The gate is hinged at its bottom and held closed by a horizontal force, FH, located at the center of the gate. The maximum value for …

A 3-m-wide, 8-m-high rectangular gate is located at the end of a rectangular passage that is connected to a large open tank filled with water as shown in the figure. The gate is hinged at its bottom and held closed by a horizontal force, FH, located at the center of the gate. The maximum value for FH is 3500 kN. Determine the maximum water depth, h, above the center of the gate that can exist without the gate opening. Read More »

2) A thin 4-ft-wide, right-angle gate with negligible mass is free to pivot about a frictionless hinge at point O. The horizontal portion of the gate covers a 1-ft-diameter drainpipe which contains air at atmospheric pressure. Determine the minimum water depth h at which the gate will pivot to allow water to flow through the pipe.

2) A thin 4-ft-wide, right-angle gate with negligible mass is free to pivot about a frictionless hinge at point O. The horizontal portion of the gate covers a 1-ft-diameter drainpipe which contains air at atmospheric pressure. Determine the minimum water depth h at which the gate will pivot to allow water to flow through the …

2) A thin 4-ft-wide, right-angle gate with negligible mass is free to pivot about a frictionless hinge at point O. The horizontal portion of the gate covers a 1-ft-diameter drainpipe which contains air at atmospheric pressure. Determine the minimum water depth h at which the gate will pivot to allow water to flow through the pipe. Read More »

A 3-m-wide, 8-m-high rectangular gate is located at the end of a rectangular passage that is connected to a large open tank filled with water as shown in Fig. P3. The gate is hinged at its bottom and held closed by a horizontal force, FH, located at the center of the gate. The maximum value for Fh is 3500kN. (a) Determine the maximum water depth, k, above the center of the gate that can exist without the gate opening, (b) Is the answer the same if the gate is hinged at the top? Explain your answer.

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An open tank has a vertical partition and contains gasoline(ρ=700 kg/m3 ) to the right at a depth of 4m assketched. The partition contains a rectangular gate that is 4m highand 2m wide and is hinged at the bottom with a stop at the topagainst outflow of gasoline. Water is slowly added to the left sideof the tank that was originally empty. At what depth hwill the gate start to open?

An open tank has a vertical partition and contains gasoline(ρ=700 kg/m3 ) to the right at a depth of 4m assketched. The partition contains a rectangular gate that is 4m highand 2m wide and is hinged at the bottom with a stop at the topagainst outflow of gasoline. Water is slowly added to the left sideof …

An open tank has a vertical partition and contains gasoline(ρ=700 kg/m3 ) to the right at a depth of 4m assketched. The partition contains a rectangular gate that is 4m highand 2m wide and is hinged at the bottom with a stop at the topagainst outflow of gasoline. Water is slowly added to the left sideof the tank that was originally empty. At what depth hwill the gate start to open? Read More »

A river barge, whose cross section is approximately rectangular, carries a load of grain. The barge is 28 ft wide and 90 ft long. When unloaded its draft (depth of submergence) is 5 ft, and with the load of grain is 7 ft. Determine: (a) the unloaded weight of the barge, and (b) the weight of the grain.

A river barge, whose cross section is approximately rectangular, carries a load of grain.  The barge is 28 ft wide and 90 ft long.  When unloaded its draft (depth of submergence) is 5 ft, and with the load of grain is 7 ft.  Determine:  (a) the unloaded weight of the barge, and (b) the weight …

A river barge, whose cross section is approximately rectangular, carries a load of grain. The barge is 28 ft wide and 90 ft long. When unloaded its draft (depth of submergence) is 5 ft, and with the load of grain is 7 ft. Determine: (a) the unloaded weight of the barge, and (b) the weight of the grain. Read More »

An open tank has a vertical partition and on one side contains gasoline with a density rho = 800 kg/m^3 at a depth of 3.9 m, as shown in Fig. P2.99. A rectangular gate that is 3.9 m high and 2 m wide and hinged at one end is located in the partition. Water is slowly added to the empty side of the tank. At what depth, h, will the gate start to open? Concepts: The pressure in a fluid is a function of the specific weight of the fluid and the height relative to a reference. Pressure is constant on horizontal planes of a continuous mass of fluid. Sum of the moments is zero for equilibrium (a) What is the specific weight of the gasoline? (b) What is the force of the gasoline on vertical gate? (c) Where does the force of the gasoline act with respect to the hinge? (d) What is the moment of the force of the gasoline around the hinge? (a) Y = N/m^3 (b) F = kN (c) h = m (d) M = kN-m Set up the equations for the moment of the water on the gate. (a) What is the moment of the water on the gate? (b) What is the height of the water that yields that moment? (a) M = kN-m (b) h = m

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