ML23146A102
| ML23146A102 | |
| Person / Time | |
|---|---|
| Issue date: | 06/14/2023 |
| From: | Matthew Homiack, Ali Rezai NRC/NRR/DNRL/NPHP, NRC/RES/DE |
| To: | |
| References | |
| Download: ML23146A102 (1) | |
Text
E x t r e m e l y L o w P r o b a b i l i t y o f R u p t u r e
( x L P R ) C o d e N R C P e r s p e c t i v e s a n d A c t i v i t i e s 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
2 M a i n t e n a n c e a n d D e v e l o p m e n t Version 2.2 Publicly available at no cost Send inquires to xlpr@nrc.gov and xlpr@epri.com Version 2.3 Development underway Optimized crack initiation module Exploring Process Improvements GitHub for software development and version control Agile software development process
3 N R C A p p l i c a t i o n s Integration of Probabilistic Fracture Mechanics with Artificial Intelligence and Machine Learning (AI/ML)
> NRC Future Focused Research project
> AI/ML can perform analyses recommended by Regulatory Guide 1.245, Preparing Probabilistic Fracture Mechanics Submittals Chloride Induced Stress Corrosion Cracking of Spent Fuel Storage Canisters
> Investigating impact of improved crack growth modeling Loss of coolant accident initiating event frequency estimation
> Public meetings with the Electric Power Research Institute (EPRI) on June 14, 2022, and January 19, 2023
> Confirmatory xLPR analyses AI
4 N R C A p p l i c a t i o n s C o n t i n u e d Thermal Aging Embrittlement of Cast Austenitic Stainless Steels
> Sensitivity studies
> Exploring modeling options Stress Corrosion Cracking of Stainless Steel
> Emergent issue support
> Initiating event frequency input to probabilistic risk assessment
5 I n t e r n a t i o n a l B e n c h m a r k i n g O v e r v i e w Probabilistic Fracture Mechanics Codes C o d e A n a l y s t O r g a n i z a t i o n Beyond-PRAISE Structural Integrity Associates, Inc., USA DeMoT Nuclear Research and Consultancy Group, Netherlands NURBIT Kiwa Technical Consulting AB, Sweden PEDESTRIAN Central Research Institute of Electric Power Industry, Japan PASCAL-SP Japan Atomic Energy Agency PRAISE-CANDU Candu Energy, Inc., Canada PRO-LOCA Engineering Mechanics Corporation of Columbus, USA; Korea Institute of Nuclear Safety, Republic of Korea; and Paul Scherrer Institut (PSI), Switzerland PROMETHEUS Engineering Mechanics Corporation of Columbus, USA PROST PSI, Switzerland; and Gesellschaft für Anlagen-und Reaktorsicherheit (GRS) gGmbH, Germany SACC Lithuanian Energy Institute SIF-Master IPP Centre, Ukraine VTTBESIM VTT Technical Research Centre, Finland xLPR U.S. Nuclear Regulatory Commission Xpipe MPA University of Stuttgart, Germany 14 T h e N R C i s c o - l e a d i n g a n i n t e r n a t i o n a l b e n c h m a r k i n g e f f o r t o r g a n i z e d t h r o u g h t h e N u c l e a r E n e r g y A g e n c y
6 T h e B e n c h m a r k P r o b l e m Circumferential crack in a 380-mm (15-inch) piping butt-weld Pressurized-water reactor hot-leg operating conditions Material: Alloy 182 Cracking mechanism: Primary water stress-corrosion cracking (PWSCC)
7 D e t e r m i n i s t i c B e n c h m a r k C o m p a r i s o n s Axial Welding Residual Stress DP-01 Leak-Before-Break Results DP-02 Leak-Before-Break Results
8 P r o b a b i l i s t i c B e n c h m a r k C o m p a r i s o n s PP-01 Probability of Rupture Results PP-03 Probability of Rupture Results
9 B e n c h m a r k P u b l i c a t i o n s 2022 American Society of Mechanical Engineers (ASME) Pressure Vessels and Piping Conference PVP2022-84724, Probabilistic Fracture Mechanics Codes for Piping International BenchmarkPart 1: Deterministic Comparisons 26th International Conference on Structural Mechanics in Reactor Technology (SMiRT26)
Th.2.H.5, Assessment of International Probabilistic Fracture Mechanics Code Models and Capabilities for Piping Applications 2023 ASME Pressure Vessels and Piping Conference PVP2022-105733, Probabilistic Fracture Mechanics Codes for Piping International BenchmarkPart 2: Probabilistic Comparisons
10 S u m m a r y
> T h e N R C a n d E P R I a r e m a k i n g x L P R m o r e e f f i c i e n t a n d e a s i e r t o m a i n t a i n
> T h e x L P R c o d e i s l e a d i n g t h e i n t e r n a t i o n a l s t a t e - o f - p r a c t i c e
> A r e a s o f a p p l i c a t i o n o f t h e x L P R c o d e a r e r a p i d l y e x p a n d i n g