ML19087A214
| ML19087A214 | |
| Person / Time | |
|---|---|
| Issue date: | 04/01/2019 |
| From: | Stroup D Office of Nuclear Regulatory Research |
| To: | |
| D. Stroup 415-1649 | |
| References | |
| Download: ML19087A214 (5) | |
Text
Status of NRC/EPRI Joint Research Activities Supporting Fire PRA Realism David W. Stroup, PE Office of Nuclear Regulatory Research
NUREG-2178 Vol. 2 (EPRI 3002016052)
- Fire Modeling Guidance for Cabinet Zone of Influence
- Revised Cabinet to Cabinet Propagation
- Heat Release Rates for Motors and Dry Transformers
- Wall and Corner Effects
- Non-suppression Floor Value
- Main Control Board Fire Modeling
- Derived from Operating Experience
- Credit for Plant Personnel Detection
- Concept for Interruptible and Growing Fires
- Revised Heat Release Rate Profiles
- Non-suppression Event Tree for Crediting Personnel Suppression
- Non-suppression Probability Floor
Transient Fuel Package Project
- Test Data to Better Reflect Operating Experience
- Realistic Nuclear Transient Fire Scenarios
- 98 Fuel Packages
- 290 Tests
- Ignition: Lighter, Cotton Wick, Open Flame
- Testing Complete
- Data Analysis Underway
Transient Fuel Package Project (continued)
Screening of targets based on probabilistic distributions for target damage
- Provide screening for vertical (plume temperature), vertical for a fire in a corner, and horizontal (radiative heat flux) Zones of Influence
- Provide screening for the categories of exposed sensitive electronics, thermoplastic cable, Kerite cable, thermoset cable, and tray ignition.
Provide guidance for the detailed modeling of fires (e.g. hot layer development, time-to-damage, etc.)
- Account for the probabilistic distribution in total energy release
- Account for the probabilistic distribution in peak heat release rate ZOI.
- Provide guidance on the shape of the HRR curve (Growth, Steady State, and Decay)
- Provide guidance on the size of the fire, i.e., the Fire Froude number or Q*.