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
Joint EPRI/NRC-RES HEAF Workshop May 18, 2023 EPRI/NRC Fire PRA Training Future Testing / Completion of OECD/NEA Program
2 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
3 OECD/NEA Phase II Testing - Circa 2018
4 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 OECD/NEA Phase II Testing - Primary Parameters of Interest
5 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
6 Draft Test Matrix Test ID Equipment Voltage
[V]
Current
[kA]
Target Arc-Duration [s]
Bus Bar Material Enclosure Design Style Testing Configuration Arc Initiation Location 2-33 Low Voltage Enclosure 600 15 8
Copper N/A Lineup Load side/
Breaker Stab 2-34 Low Voltage Enclosure 600 8
20-40 Copper N/A Back-to-Back Breaker Stab 2-35 Medium Voltage Enclosure 6900 15 8
Copper Vertical Lift Lineup Main Bus 2-36 Medium Voltage Enclosure 6900 32 4
Copper Vertical Lift Lineup Main Bus 2-37 Medium Voltage Enclosure 6900 32 4
Copper Horizontal Draw out Lineup Main Bus 2-38 Medium Voltage Enclosure 6900 32 4
Copper Horizontal Draw out Cross Aisle Breaker Stab 2-39 Medium Voltage Enclosure 6900 32 4
Copper Horizontal Draw out Back-to-Back Breaker Stab 2-40 Bus Duct 4160 30 4
Copper N/A Improved Instrumentation Center 2-41 Bus Duct 4160 30 4
Aluminum N/A Improved Instrumentation Center Draft Test Matrix
7 Vertical Lift Primary Cable Compartment Bus Bars Main Bus Bars Breaker Stabs Circuit Breaker (Vertical-Lift) (Shaded Region)
Meter and Relay Cubicle Location (Barriers not shown)
Fire spread case 4 HEAF location Fire spread Case 3 HEAF location Fire spread cases 1 and 2 HEAF location Circuit Breaker (Horizontal Draw-Out)
(Shaded Region)
Arc Chute Main Bus Bars Cable Riser Bus Bars Meter and Relay Cubicle Location (Barriers not shown)
Fire spread case 4 HEAF location Fire spread cases 1 and 2 HEAF location Fire spread case 3 HEAF location Horizontal Draw Out
8 Fire Spread from Enclosure to Enclosure Supply Supply Load 170 kW HEAF Section Adjacent Section 2 Adjacent Section 1 Switchgear and Load Center (Thermoset/QTP)
Switchgear and Load Center (Thermoplastic)
Medium Volume, Very Low Fuel Load 45 kW 170 kW Switchgear and Load Center (Thermoset/QTP)
Switchgear and Load Center (Thermoplastic)
Medium Volume, Very Low Fuel Load 45 kW 170 kW Time (minutes) 0 10 20 30 40 50 Heat Release Rate (kW) 0 100 200 300 400 500 Fire Spread Case 1 (Thermoplastic)
Fire Spread Case 1 (Thermoset/QTP)
Fire Spread Cases 2, 3, and 4 HEAF Vertical Section
9 Lineup Configuration Tests, Breaker Stab Initiation
10 Cross Aisle Testing, Main Bus Bar Initiation
11 Back-to-Back Configuration, Main Bus Initiation
12 Low Voltage Lineup Configurations, Breaker Stab Initiation Arc Location 1 Test 2-33A Arc Location 2 Test 2-33B Text
13 Instrumentation PTC T
PTC T
.5" 1"
.5"
.5"
.5"
.5"
.5" 1"
36" T
C C
T C
.5 12 1/2 8"
8" 8"
8" 8"
4.0 2.0 2.0 4.0 ASTM-Slug Calorimeter PTC-Plate Thermometer T-Thermal Capacitance Slug CC-Cable Coupon C-Carbon Tape
- The same suite of instrumentation used in previous test series will be used in the upcoming series of testing
- Fiberoptic measurement devices will be used in where there is a possibility of arc migration.
- This device will ensure collection of relevant temperature data to understand the fire spread while protecting the data acquisition system.
14 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
15 Draft Schedule