Incorporation of new procedures into the Limerick PRA

When the Limerick probabilistic risk assessment (LGS PRA) was first published, the plant was still under construction and there were no station emergency operating procedures available to the analysts. The Limerick transient response implementation plan (TRIP) procedures were later written utilizing the symptom-based emergency procedure guidelines developed by the boiling water reactor owners group. As part of its program to use the PRA as a living plant model, Philadelphia Electric Company undertook a project to determine to what extent the existing model incorporated the operator actions called or by the TRIP procedures and, where there were differences, to modify the LGS PRA model. The analysis of the TRIP procedures was conducted along the general guidelines for the analysis of human interactions provided by the systematic human action reliability procedures (SHARP).