Safe shutdown (SSD)
With an electrical distribution diagram and system flow diagrams already built in GLASS, equipment can be logically related to cable routings and fire areas to develop and document safe shutdown fire area strategies to meet regulatory compliance with 10 CFR 50 Appendix R, NUREG-0800, or NFPA 805. FRS-SSD can assist with identifying simplified approaches to mitigating a scenario using a minimal set of recovery actions outside of the control room or alternative recovery actions that may restore more redundancy to challenged systems.
FRS-SSD provides an interactive safe shutdown analysis that is understandable and easy to use. FRS-SSD provides diverse functionality including the ability to perform and document:
- Safe shutdown analyses by fire area (or fire scenario to support the Fire PRA)
- Equipment-cable analyses
- Equipment-cable resolutions
- Recovery actions Protected Raceways (ERFBS)
- Customized Reports
- Provide basic event mapping for input into Fire PRA Quantification
Fire area summary annunciator panel
Developing a facility’s safe shutdown analysis inside FRS provides a simplified yet comprehensive approach in an interactive setting where the graphical logic assists with documentation and ongoing program maintenance. ‘What-If’ scenarios provide a unique look at all possible options available to the safe shutdown team. Building a facility’s safe shutdown analysis inside FRS provides a methodology that understands the importance of each recovery action. FRS confirms which actions are required for safe shutdown and which actions provide redundant support.
Additionally, FRS-SSD provides an intuitive graphical interface to assist with:
- Understanding not only the credited success path for compliance, but all possible success paths, providing enhanced understanding of operational and equipment impacts to the SSD analysis.
- Tracking out of service (OOS) equipment and their impacts on credited SSD compliance strategies.
- Understanding the appropriate compensatory measures when equipment is OOS.
- Understanding power supply dependencies.
- Understanding performance goal success logic and failures that impact performance goal success.
- Visualizing conceptual design modifications prior to implementation.
Electrical distribution model
System flow diagram
Depicts system and equipment status in user-familiar formats.>View
Download the Facility Response Simulation (FRS) brochure.>View
Symbols and layouts can be customized to meet user preferences.>View
Planning, engineering, rad protection, operations and security.>View
Provides real-time evaluation into potential radiation exposures.>View
Mitigation strategies for beyond-design-basis external events.>View