Explain your choice of a pressure-to-open (normally closed) or pressureto- close (normally opened) valve in the following scenarios:
a) A valve on a cooling water line which is used to cool down a reactor hosting an exothermic reaction
b) A valve on a water line heading to a treatment plant before being released in a river
c) A valve on a gas stream (containing SO2) going to an absorption tower before being released to the atmosphere
This question belongs to physics and discusses about cooling water line used to cool down a reactor hosting an exothermic reaction.
Word count: 124
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