We use our extensive experience in nuclear engineering, radiation and shielding to support customers in the development of nuclear systems. For example, we design radiation shielding for personal safety and provide advice on dealing with radioactive materials. For modelling all relevant particle interactions, we perform Monte-Carlo simulations, using FLUKA, to calculate a range of radiological quantities. These include activation of materials, volumetric heat loads, fluences and radiation-induced damage. Our strength lies in combining these calculations with finite-element analyses to provide complete solutions for complex cases. This enables us to couple radiation effects tightly to structural, flow and thermal aspects. In this way, we can support the design for intense radiation environments, where active cooling is required and structural integrity is critical.