Difference between revisions of "Plant Fire-Induced Risk Model (Task 5)"
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==Supplemental Guidance== | ==Supplemental Guidance== | ||
| − | + | ===[https://www.epri.com/#/pages/product/000000003002009215/ EPRI/NRC-RES Fire Human Reliability Analysis Guidelines: Qualitative Guidance for Main Control Room Abandonment Scenarios (NUREG-1921 Supplement 1 / EPRI 3002009215)]=== | |
| + | |||
| + | Fire PRAs analyze a wide variety of fire-induced scenarios, one of which is fire damage rendering the main control room (MCR) either inhabitable or ineffective. As a result of this fire damage, operators cannot stay in the MCR and the command and control of the plant is transferred from the MCR to another location. This is commonly referred to a main control room abandonment (MCRA). MCRA is analyzed as a special case of fire HRA. While NUREG-1921/EPRI 1023001 briefly addressed abandonment, additional guidance and inputs are needed to properly address the unique contexts of abandonment scenarios. | ||
| + | |||
| + | This report addresses the qualitative HRA and PRA considerations for MCRA including: | ||
| + | *Modeling considerations for MCRA, scenario-specific success criteria, and incorporation of human failure events (HFEs) and equipment failures into the plant response model. | ||
| + | *MCRA scenario development, including consideration of the decision to abandon | ||
| + | *Feasibility assessment and HFE definition and identification | ||
| + | *Timing and timeline guidance | ||
| + | *Qualitative HRA specific to MCRA scenario context, including consideration of performance shaping factors and other influences on operator performance. | ||
Revision as of 15:54, 1 August 2018
Contents
Task Overview
Background
This task discusses steps for the development of a logic model that reflects plant response following a fire. Specific instructions have been provided for treatment of fire-specific procedures or preplans. These procedures may impact availability of functions and components, or include fire-specific operator actions (e.g., self-induced-station-blackout).
Purpose
This section describes the procedure for developing the Fire PRA Model to calculate CDF, CCDP, LERF, and CLERP for fire events. The procedure addresses the process of implementing temporary or permanent changes to the Internal Events PRA to quantify fire-induced CDF, CCDP, LERF, and CLERP, and for developing special models to address FEPs. The procedure also addresses the transition from temporary changes to permanent changes to the Internal Events PRA Model during the development of the Fire PRA Model.
Scope
This procedure addresses the following major steps for developing the Fire PRA Model for calculating CDF/CCDP and LERF/CLERP for fire events.
- Step 1–Develop the Fire PRA CDF/CCDP Model.
- Step 2–Develop the Fire PRA LERF/CLERP Model.
Related Element(s) of ASME/ANS PRA Standard, ASME-RA-Sb-2013
Fire PRA Plant Response Model (PRM)
Related EPRI 1011989 NUREG/CR-6850 Appendices
None
Supplemental Guidance
EPRI/NRC-RES Fire Human Reliability Analysis Guidelines: Qualitative Guidance for Main Control Room Abandonment Scenarios (NUREG-1921 Supplement 1 / EPRI 3002009215)
Fire PRAs analyze a wide variety of fire-induced scenarios, one of which is fire damage rendering the main control room (MCR) either inhabitable or ineffective. As a result of this fire damage, operators cannot stay in the MCR and the command and control of the plant is transferred from the MCR to another location. This is commonly referred to a main control room abandonment (MCRA). MCRA is analyzed as a special case of fire HRA. While NUREG-1921/EPRI 1023001 briefly addressed abandonment, additional guidance and inputs are needed to properly address the unique contexts of abandonment scenarios.
This report addresses the qualitative HRA and PRA considerations for MCRA including:
- Modeling considerations for MCRA, scenario-specific success criteria, and incorporation of human failure events (HFEs) and equipment failures into the plant response model.
- MCRA scenario development, including consideration of the decision to abandon
- Feasibility assessment and HFE definition and identification
- Timing and timeline guidance
- Qualitative HRA specific to MCRA scenario context, including consideration of performance shaping factors and other influences on operator performance.
