ARCTM SOFTWARE
For Fire Protection and PRA

ERIN developed the ARC software to perform and document complete Appendix R compliance strategy assessments using deterministic methods through a logical process of fire scenario evaluation.

The ARC software code maps the logical model to the equipment. It applies the Fire Area/Zone information to identify equipment directly failed due to the location of equipment or cabling, cable trays and power supplies in the Fire Area/Zone being analyzed, and propagates these failures in the fault tree to identify equipment indirectly affected by the Fire Area/Zone circumstance. The result is a consolidated list of failed equipment as a result of the fire scenario.

The ARC product facilitates the review of failed equipment to develop a compliance strategy for successful fire scenario mitigation documenting the successful mitigation of the fire-failed component based on success of redundant capability. If needed, logical model recoveries are applied to represent actions to recover failed equipment and restore lost critical safety function. Analysis of each of the fire scenarios completes the analysis for the plant "as-build" design.

The ARC code features a What-if capability to evaluate design changes planned or other conditions requiring temporary analysis without compromising the current plant condition assessment while maintaining documented evidence of Appendix R compliance for the plant "as-built" design.