User involvement in system design of an advanced safety parameter display system for the Forsmark 2 nuclear power plant

A safety parameter display system is being developed for the Forsmark 2 nuclear power plant. The system should support the plant accident management strategy ranging from handling of transients to severe accidents. This paper summarizes the guiding principles behind the SPDS system development. The system will support the operators decision-making by presenting information in a concentrated form. The system will primarily be a tool for the shift supervisor and closely connected to the emergency operating procedures (EOP). The system will monitor the four critical safety functions; reactivity, core cooling, heat sink and radioactive release barriers. A successful implementation of an SPDS system must in the early design process involve the end users, a new information system must also be strongly connected to existing work routines at the NPP. Human needs and limitations must be carefully considered in the development of computerized operator aids, human factors experts must also be involved in the early design process. Our intention in the Forsmark projects is to use an accurate model of the system end user while developing an SPDS system. This will be done by using a multidisciplinary project group and through active involvement of the end users in the design process. (author). 7 refs