ML22143A836: Difference between revisions
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{{#Wiki_filter:Extremely Low Probability of Rupture (xLPR) Code | {{#Wiki_filter:Extremely Low Probability of Rupture (xLPR) Code | ||
NRC Perspectives | |||
Matthew Homiack | |||
Materials Engineer U.S. Nuclear Regulatory Commission Office of Nuclear Regulatory Research Division of Engineering Reactor Engineering Branch | |||
Matthew.Homiack@nrc.gov | |||
+1 (301) 415-2427 Fracture Mechanics Dif ferent Anal ysis Approaches | |||
Probabilistic Approach Multiple Calculations Aggregated to Give Probability of Failure over Time | |||
Stress +Toughness +Crack Growth +Crack SizeLife | |||
Single Calculation Conservatively Conservatively Conservatively Conservatively Plus Margin Gives High Value Low Value High Value High Value Single, Conservative Result Deterministic Approach | |||
Have Questions or Need Infor mation on xLPR? | 2 xLPR Code Capabilities and Limitations | ||
xlpr@nrc.gov xlpr@epri.com 9}} | |||
> Stress-Corrosion Cracking | |||
> Thermal and Mechanical Fatigue | |||
> Crack Initiation | |||
> Leak Rate Calculations | |||
> Residual Stress Effects | |||
> Water Chemistry | |||
> Ultrasonic Inspections | |||
> Seismic Effects | |||
> Mechanical Mitigation | |||
> Models Only Certain Failure Modes | |||
> Limited to Butt-Weld Geometry | |||
> Only Performs Component-Level Analyses | |||
33 Recently Completed NRC Projects | |||
NUREG-2247 / Electric Power Research Institute (EPRI) 3002013307 Extremely Low Probability of Rupture Version 2 Probabilistic ML21225A736 Fracture Mechanics Code | |||
TLR-RES/DE/REB-2021- 09 Probabilistic Leak-Before-Break Evaluation of Westinghouse Four-Loop Pressurized-Water Reactor Primary Coolant Loop Piping ML21217A088 using the Extremely Low Probability of Rupture Code | |||
TLR-RES/DE/REB-2021-14-R1 Probabilistic Leak-Before-Break Evaluations of Pressurized-Wa t e r Reactor Piping Systems using the Extremely Low Probability of ML22088A006 Rupture Code | |||
4 Ongoing NRC Projects | |||
International Benchmark Co-leading Study Organized through the Nuclear Energy Agency | |||
Software Maintenance and Development Continued Cooperation with EPRI | |||
5 xLPR Ver sion 2.2 Release | |||
Summer 2022 | |||
> Improved preprocessor with 64-bit support | |||
> Minor bug fixes identified through leak-b efo re-break studies | |||
> Other user enhancements | |||
6 Futur e NRC Plans | |||
> Use the xLPR code to support risk - informed decisions on licensing reviews and other regulatory activities | |||
> Continue to maintain and develop the code to the state - of-practice | |||
> Build the international user community | |||
77 Public Meeting Announcement | |||
MARK CALENDAR | |||
June 14 th | |||
Public meeting with EPRI to Discuss Use of the xLPR Code for Loss-of-Coolant Accident Frequency Estimates | |||
> Details and agenda are in the public meeting announcement (ML22133A035) | |||
8 Have Questions or Need Infor mation on xLPR? | |||
xlpr@nrc.gov | |||
xlpr@epri.com | |||
9}} | |||
Revision as of 00:42, 18 November 2024
| ML22143A836 | |
| Person / Time | |
|---|---|
| Issue date: | 05/25/2022 |
| From: | Matthew Homiack NRC/RES/DE |
| To: | |
| Kalikian R, 301-415-5590 | |
| Shared Package | |
| ML22143A408 | List: |
| References | |
| Download: ML22143A836 (9) | |
Text
Extremely Low Probability of Rupture (xLPR) Code
NRC Perspectives
Materials Engineer U.S. Nuclear Regulatory Commission Office of Nuclear Regulatory Research Division of Engineering Reactor Engineering Branch
Matthew.Homiack@nrc.gov
+1 (301) 415-2427 Fracture Mechanics Dif ferent Anal ysis Approaches
Probabilistic Approach Multiple Calculations Aggregated to Give Probability of Failure over Time
Stress +Toughness +Crack Growth +Crack SizeLife
Single Calculation Conservatively Conservatively Conservatively Conservatively Plus Margin Gives High Value Low Value High Value High Value Single, Conservative Result Deterministic Approach
2 xLPR Code Capabilities and Limitations
> Stress-Corrosion Cracking
> Thermal and Mechanical Fatigue
> Crack Initiation
> Leak Rate Calculations
> Residual Stress Effects
> Water Chemistry
> Ultrasonic Inspections
> Seismic Effects
> Mechanical Mitigation
> Models Only Certain Failure Modes
> Limited to Butt-Weld Geometry
> Only Performs Component-Level Analyses
33 Recently Completed NRC Projects
NUREG-2247 / Electric Power Research Institute (EPRI) 3002013307 Extremely Low Probability of Rupture Version 2 Probabilistic ML21225A736 Fracture Mechanics Code
TLR-RES/DE/REB-2021- 09 Probabilistic Leak-Before-Break Evaluation of Westinghouse Four-Loop Pressurized-Water Reactor Primary Coolant Loop Piping ML21217A088 using the Extremely Low Probability of Rupture Code
TLR-RES/DE/REB-2021-14-R1 Probabilistic Leak-Before-Break Evaluations of Pressurized-Wa t e r Reactor Piping Systems using the Extremely Low Probability of ML22088A006 Rupture Code
4 Ongoing NRC Projects
International Benchmark Co-leading Study Organized through the Nuclear Energy Agency
Software Maintenance and Development Continued Cooperation with EPRI
5 xLPR Ver sion 2.2 Release
Summer 2022
> Improved preprocessor with 64-bit support
> Minor bug fixes identified through leak-b efo re-break studies
> Other user enhancements
6 Futur e NRC Plans
> Use the xLPR code to support risk - informed decisions on licensing reviews and other regulatory activities
> Continue to maintain and develop the code to the state - of-practice
> Build the international user community
77 Public Meeting Announcement
MARK CALENDAR
June 14 th
Public meeting with EPRI to Discuss Use of the xLPR Code for Loss-of-Coolant Accident Frequency Estimates
> Details and agenda are in the public meeting announcement (ML22133A035)
8 Have Questions or Need Infor mation on xLPR?
xlpr@nrc.gov
xlpr@epri.com
9