## (Solved) Q1) In a Boiling Water Reactor (BWR), cooling water enters the channel from the bottom of the core after passing through jet pumps, the quality at...

I need an urgent help in the following question attached.

It is due tomorrow at the 23rd of april, i appreciate your help

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Q1) In a Boiling Water Reactor (BWR), cooling water enters the channel from the bottom of the
core after passing through jet pumps, the quality at the channel entrance can be assumed to be
0.0%. However throughout the channel heat is added due to the fission in the fuel elements ,
2
you can assume that the power distribution (as a function of distance) is given by 4 z âˆ’z
[KW/m]. Where z is the distance from the channel bottom. assuming that the slip ratio is equal
Ïf
Ïv
to (
.
1
Â¿ Â¿3
(Neglect form pressure losses)
a) Calculate the pressure drop through the flow channel (losses due to the fuel rod region) ?
[25%]
b) What is the flow regime at the inlet and exit? [10%]
c) What is the total channel power output? [10%]
d)Calculate the required mass flow rate to remove the power calculated in part c) and compare
it to the mass flow rate given in the problem? [10%] 14.
27
m
m 1
4
.
2
7 m
m BWR Problem Specifications:
System pressure: 7.136 MPa
Vessel Height: 22 m
Total Fuel Rod height: 4.1787 m
Core shroud diameter: 5.2 m
Number of fuel assemblies: 764
Core mass flow rate: 13702 kg/s
Core inlet temperature: 278.3 ÂºC
Core outlet temperature: 287.2 ÂºC
Core exit quality: 13.1 %
Feedwater flow rate: 1820 kg/s
Steam flow rate: 1820 kg/s
Steam temperature, 287.2 ÂºC
Fuel Pellet OD: (mm) 9.55
Fuel Pin OD: (mm) 11.18
Fuel Pin Pitch: (mm) 14.27
Friction coefficient: 0.02 Figure 1. BWR Core and Containment.

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This question was answered on: Sep 05, 2019

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