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A certain u-235 fueled pressurized water reactor is just critical. Suddenly the average coolant temperature falls from 300c to 280c \alphat=-0.0001 \deltak/c
A) How much reactivity is inserted?
B) What is the new value of keff?
a scuba diver has a tank with an internal volume of 2500 cm3 air tank which is pressurized to 22 mpa at 27 deg c. after
Steam at a pressure of 0.08 bar and a quality of 93.2% enters a shell-and-tube heat exchanger where it condenses on the outside of tubes through which cooling water flows, exiting as saturated liquid at 0.08 bar. The mass flow rate of the condensing ..
a closed rigid tank whose volume is 1.5 m3 contains refrigerant 134a initially a two phase lipuid-vapor mixture at 10c.
A pump is employed to deliver liquid water from a pond to a higher elevation. The pump steadily draws water from the pond at a volumetric flow rate of 192 gal/min through a pipe having a 7 in. diameter inlet. The exit diameter of the pipe is 2 in. an..
A shaft is subjected to mean torque of 3 * 10^6 n. mm superimposed with variable torque of 3 * 10^6 n. mm. It is also subjected to bending moment of mean zero and a superimposed variable of 6 ^ 10^6 n. mm. Design the shaft to support the load for an ..
a cylindrical tank of radius r and depth h is filled with water. the tank is open to atmosphere. derive an expression
a nylon pipe has a bore of 50 mm and a wall thickness of 5 mm. it covered with insulation of 10 mm thick. the thermal
Large stationary brayton cycly gas turbine power plant delivers a powr output of 100MW to an electric generator . Minimum temperature is 300K so T1= 300k max temp is 1600k
saturated water vapor in a closed sysytem is condensed by cooling it at constant pressure to a saturated liquid at
r-134a is throttled from 1200kpa and 40 degree c to 200kpa. it is known that heat of 5kjkg is lost from r-134a to the
Water is flowing through a pipe with a circular cross section at a rate of 5.2 gallons per minute (US GPM). The pipe has an outer diameter of 2.2 inches and an inner diameter of 1.6 inches. What is the average velocity of the flow in the pipe in ft/s..
in a gas turbine operating at a steady state air enters the compressor with a mass flow rate of 5 kgs at .95 bar and 22
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