Complex sentence: This led to the possibility of using water cooling, as the losses to the water would not be great enough to stop the reaction, and the cost and mechanical simplicity of such a solution was overwhelming compared to the gas cooled solution.
Split into simpler sentences: This led to the possibility of using water cooling, as the losses to the water would not be great enough to stop the reaction. The cost advantages and mechanical simplicity of such a solution was overwhelming compared to the gas cooled solution.