Stewart Hay

Stewart is a Chartered Physicist, criticality safety and radiation shielding assessor. He is also a co-founder and Director of Cerberus Nuclear and represents the company on the UK Working Party on Criticality (WPC).  

For over 19 years Stewart has worked across the UK nuclear industry with long-term secondments to a number of key clients including URENCO, AWE, NNL (Springfield Fuels) and Sellafield Limited.  His project work has involved working with other safety disciplines, design engineers, plant management and regulators to achieve fit for purpose designs and processes.  

Stewart is a highly experienced user of various computer codes, including MCNP, MONK and MCBEND, and has produced validation and verification documentation for several clients. Stewart is also an effective mentor of graduate and early career criticality assessors and has extensive experience of supervising the work of trainee criticality assessors.