$4\mathrm{.}1.$ Consider be reactor sbown in Figare $4\mathrm{.}1.$ The rraction is ewoderesic. A cooling wyolers is proviled se remove the eweis energo of reactive. Is the evest of pooling function is loot the lemperatare of the reacsor woald incneave. This would lead bo an increase in reaction rale leading so aditiotal mercy release.

The renulos coold be a runuway reaction with perovares euseding the berting prevare of the reactioe. The bemperatare widhin the reacter is mearured and is wund to cootrol the cooling water flow rate by a valve.