# Some nuclear power plants, which are facing space limitation in their spent fuel pool, place older..

Some nuclear power plants, which are facing space limitation
in their spent fuel pool, place older fuel assemblies in steel cylinders,
referred to as dry shielded canisters (DSC). The DSC is then hermetically
sealed and placed horizontally inside a concrete bunker, known as the
horizontal storage module (HSM). Decay heat is removed by natural convection.
Colder air entering the HSM through the inlet screen leaves through the vents
located at the top of HSM. The loss coefficient and flow area of the inlet and
exit ports are as follows:

Total loss coefficient and flow area associated
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Some nuclear power plants, which are facing space limitation
in their spent fuel pool, place older fuel assemblies in steel cylinders,
referred to as dry shielded canisters (DSC). The DSC is then hermetically
sealed and placed horizontally inside a concrete bunker, known as the
horizontal storage module (HSM). Decay heat is removed by natural convection.
Colder air entering the HSM through the inlet screen leaves through the vents
located at the top of HSM. The loss coefficient and flow area of the inlet and
exit ports are as follows:

Total loss coefficient and flow area associated with the
flow through the HSM are 2.5 and 0.5 m2 , respectively. Total rate of decay
heat for the DSC is 15 kW. The system thermal length, as defined in Problem 14
is 3.5 m. Air enters the HSM at a temperature of 22 C. Assume air at exit is
well mixed. Use the given data to find a) temperature rise, b) flow rate of air
through the HSM, and c) total pressure drop from inlet to exit.

Problem 14

A natural circulation loop is shown in the figure. Verify
the validity of Equation VId.3.14. Assume that the thermal centers for the heat
source and heat sink, in this case, are located at the geometrical center of
each source. The vertical distance between the two sources is shown by Hth.
Elevations L1, L2, and L3 are given.

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