ML21230A356

International Pfm Code Benchmark

ML21230A356
Person / Time
Issue date:	08/18/2021
From:	NRC/RES/DE
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Homiack M
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International Probabilistic Fracture Mechanics Benchmark for Piping Applications xLPR User Group Meeting August 18, 2021 1

Organizing Committee on the Safety of Nuclear Installations, Working Group on Integrity and Ageing of Committee Components and Structures 2

PARTICIPATING ORGANIZATIONS SNC Lavalin (Candu Energy Inc)* JAEA (Japan Atomic Energy Agency)

U.S. NRC (United States Nuclear Regulatory LEI (Lithuanian Energy Institute)

Commission)* MPA (Materialprüfungsanstalt) University of CRIEPI (Central Research Institute of Electric Power Stuttgart Industry NRG (Nuclear Research and Consultancy Group)

EMC2 (Engineering Mechanics Corporation of SIA (Structural Integrity Associates)

Columbus)

VTT (VTT Technical Research Centre of Finland)

KINS (Korea Institute of Nuclear Safety)

KIWA (Kiwa Inspecta Technology AB)

PSI (Paul Scherrer Institut)

GRS (Gesellschaft für Anlagen- und 15 Reaktorsicherheit)

IPP-Centre

• Co-leads 3

OBJECTIVES

1. Understand differences in probabilistic fracture mechanics (PFM) software design

2. Understand effectiveness of nondestructive examination in reducing failure probabilities

3. Understand effectiveness of leak detection in reducing failure probabilities

4. Reconcile deterministic and probabilistic leak-before-break approaches 4

PROJECT PLAN Questionnaire on PFM code design Deterministic benchmark problems Probabilistic benchmark problems Final report and analysis 5

PRELIMINARY RESULTS DETERMINISTIC PROBLEM 1 xLPR 6

PRELIMINARY RESULTS DETERMINISTIC PROBLEM 2 500 500 450 450 Time to First Leak (months) Time to Rupture (months) 400 400 350 350 xLPR 300 300 250 250 200 200 150 150 7

LOOKING FORWARD Much More to Come!

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