42 Technical research, development, characterization and analysis, all being engineering services, in the field of nuclear energy, pollution of nuclear origin, radioactivity, contaminated installations, equipment and materials, waste and radiology; engineering consulting, surveying and engineering testing in connection with installations, equipment, materials in the fields of nuclear energy, pollution of nuclear origin, radioactivity, treatment of waste and contaminated installations; computer simulation and quality and safety control for others in the fields of nuclear energy, pollution of nuclear origin, radioactivity, treatment of waste and contaminated installations, equipment, and materials; scientific and industrial research, technical engineering studies, technical appraisals in the field of nuclear energy, pollution of nuclear origin, radioactivity, treatment of waste and contaminated installations, equipment and materials; prevention of risks being engineering and consulting services connected with pollution generated by activities connected with nuclear energy, radioactivity, contaminated installations, equipment, materials and waste; environmental and security auditing services for sites, installations and equipment, namely, engineering services, in the field of nuclear energy and activities using or generating radioactive and hazardous materials; design, programming, updating, maintenance and rental of software in the fields of nuclear energy and activities using and generating radioactive and hazardous materials; quality and safety control of radioactive and hazardous materials; quality and safety control for others and monitoring being engineering services in the field of nuclear equipment and installations; quality and safety monitoring, quality and safety control for others and computer and on site security consultancy in the fields of nuclear energy, activities using or generating radioactive or hazardous materials, installations for the storage of radioactive and hazardous materials; engineering services