With a global push to reach net zero, the need to consider small modular reactors (SMRs) to reduce costs and accelerate delivery of nuclear power has become clear. SMRs would benefit greatly from simplifications in design which could also reduce engineering, operation and running costs. One particular simplification under consideration is a boron-free coolant chemistry whereby reactivity management could be maintained through control rod operations. Issues associated with boric acid within the coolant chemistry could be eliminated, which can increase efficiency, particularly at the end of cycle.