ML23150A042
| ML23150A042 | |
| Person / Time | |
|---|---|
| Issue date: | 05/17/2023 |
| From: | Kenneth Hamburger NRC/RES/DRA/FXHAB |
| To: | |
| Hamburger K | |
| Shared Package | |
| ML23150A023 | List: |
| References | |
| Download: ML23150A042 (15) | |
Text
EPRI/NRC Fire PRA Training Future Testing / Completion of OECD/NEA Program Joint EPRI/NRC-RES HEAF Workshop May 18, 2023
OECD/NEA Phase II Testing - August 2023 BelV, Belgium Canadian Nuclear Safety Commission (CNSC), Canada The Institut de Radioprotection et de Sûreté Nucléaire (IRSN), France The Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany Nuclear Regulation Authority (NRA), Japan Central Research Institute of Electric Power Industry (CRIEPI), Japan Korea Institute of Nuclear Safety (KINS), Korea Authority for Nuclear Safety and Radiation Protection (ANVS), the Netherlands Consejo de Seguridad Nuclear (CSN), Spain United States Nuclear Regulatory Commission (US NRC), USA Chairman- Koji SHIRAI, Dr. Eng., Distinguished Research Scientist Nuclear Risk Research Center (NRRC) Central Research Institute of Electric Power Industry (CRIEPI)
Vice Chairman- Sylvain Suard, Head of the fire test laboratory, Institut de radioprotection et de sûreté nucléaire , IRSN Program Secretariat -Dr. Markus Beilmann NEAs Division of Nuclear Safety Technology and Regulation 2
OECD/NEA Phase II Testing - Circa 2018 3
OECD/NEA Phase II Testing - Primary Parameters of Interest The testing and understanding of HEAF phenomena has vastly improved through the course of the program including efforts of the OECD, EPRI and the NRC The test matrix was adjusted to best serve the remaining needs of the program Primary parameters of interest
- 1. Enclosure to enclosure propagation of HEAF effects
- 2. Cross-aisle HEAF effects
- 3. Back-to-Back enclosure propagation effects
- 4. Bus Duct instrumentation apparatus layout improvements
- 5. Data to support FDS model validation 4
HEAF Phase II OECD/NEA Testing
- Test matrix significantly reduced based on lessons learned from previous NRC and OECD testing
- The NRC is utilizing modeling tools and insights from FDS
- Final Series of OECD/NEA HEAF tests will be conducted in August 2023
- The test matrix will include
- 2 LV Enclosures
- 5 MV Enclosures
- 2 Bus Ducts 5
Draft Test Matrix Draft Test Matrix Voltage Current Target Arc- Bus Bar Enclosure Design Testing Arc Initiation Test ID Equipment
[V] [kA] Duration [s] Material Style Configuration Location Low Voltage Load side/
2-33 600 15 8 Copper N/A Lineup Enclosure Breaker Stab Low Voltage 2-34 600 8 20-40 Copper N/A Back-to-Back Breaker Stab Enclosure Medium Voltage 2-35 6900 15 8 Copper Vertical Lift Lineup Main Bus Enclosure Medium Voltage 2-36 6900 32 4 Copper Vertical Lift Lineup Main Bus Enclosure Medium Voltage 2-37 6900 32 4 Copper Horizontal Draw out Lineup Main Bus Enclosure Medium Voltage 2-38 6900 32 4 Copper Horizontal Draw out Cross Aisle Breaker Stab Enclosure Medium Voltage 2-39 6900 32 4 Copper Horizontal Draw out Back-to-Back Breaker Stab Enclosure Improved 2-40 Bus Duct 4160 30 4 Copper N/A Center Instrumentation Improved 2-41 Bus Duct 4160 30 4 Aluminum N/A Center Instrumentation 6
Vertical Lift Horizontal Draw Out Fire spread Main Bus cases 1 and 2 Bars HEAF location Meter and Relay Cubicle Location Main Bus Fire spread Primary Cable Meter and Relay (Barriers not shown) Arc Bars cases 1 and 2 Cubicle Location Compartment Bus Bars HEAF (Barriers not shown) Fire spread Chute location Case 3 HEAF location Fire spread Circuit Breaker case 3 HEAF location (Horizontal Draw-Out)
Circuit Breaker (Shaded Region)
Breaker (Vertical-Lift) (Shaded Cable Stabs Region)
Riser Bus Bars Fire spread Fire spread case 4 HEAF case 4 HEAF location location 7
Fire Spread from Enclosure to Enclosure 45 kW 45 kW 170 kW 170 kW Switchgear and Load Center (Thermoset/QTP) 170 kW Switchgear and Load Center (Thermoset/QTP)
Switchgear and Load Center (Thermoplastic) Switchgear and Load Center (Thermoplastic)
Medium Volume, Very Low Fuel Load Medium Volume, Very Low Fuel Load Fire Spread Case 1 (Thermoplastic)
Fire Spread Case 1 (Thermoset/QTP)
Fire Spread Cases 2, 3, and 4 500 Heat Release Rate (kW)
Supply Supply Load 400 300 200 Adjacent HEAF Adjacent 100 HEAF Section 1 Section Section 2 Vertical Section 0
0 10 20 30 40 50 Time (minutes) 8
Lineup Configuration Tests, Breaker Stab Initiation 9
Cross Aisle Testing, Main Bus Bar Initiation 10
Back-to-Back Configuration, Main Bus Initiation 11
Low Voltage Lineup Configurations, Breaker Stab Initiation Arc Location 2 Test 2-33B Arc Location 1 Test 2-33A Text 12
Instrumentation 36"
- The same suite of instrumentation 4.0 ASTM- Slug Calorimeter used in previous test series will be PTC- Plate Thermometer 4.0 used in the upcoming series of T- Thermal Capacitance Slug
.5 CC- Cable Coupon testing 12 1/2 12 1/2 2.0
C- Carbon Tape be used in where there is a CC CC 2.0 possibility of arc migration. T 8"
- This device will ensure collection of C C 1" .5" .5" .5" .5" .5" .5" 1" 8"
relevant temperature data to PTC ASTM T PTC T ASTM PTC understand the fire spread while T 8"
protecting the data acquisition C C 10" 10" 8" system. CC CC 8"
Test 2 - 40 Bus Duct Previous testing did not cause direct impact to the instrumentation due to arc migration and buoyancy effects These tests will allow further refinements to better understand the bus duct exposure at the most severe location within the arc path The instrumentation locations will be selected using thermal imaging insights from the tests performed in 2022 14
Draft Schedule 15