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International Pfm Code Benchmark
	ML21230A356
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Issue date:	08/18/2021
From:	; NRC/RES/DE
To:	;
	Homiack M
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ML21230A354	List: ML21230A355; ML21230A356; ML21230A357; ML21230A358; ML21230A360; ML21230A361; ML21230A363; ML21230A364; ML21230A366;
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International Probabilistic Fracture Mechanics Benchmark for Piping Applications xLPR User Group Meeting August 18, 2021 1

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

PARTICIPATING ORGANIZATIONS SNC Lavalin (Candu Energy Inc)*

U.S. NRC (United States Nuclear Regulatory Commission)*

CRIEPI (Central Research Institute of Electric Power Industry EMC2 (Engineering Mechanics Corporation of Columbus)

KINS (Korea Institute of Nuclear Safety)

PSI (Paul Scherrer Institut)

GRS (Gesellschaft für Anlagen-und Reaktorsicherheit)

IPP-Centre

15 JAEA (Japan Atomic Energy Agency)

LEI (Lithuanian Energy Institute)

MPA (Materialprüfungsanstalt) University of Stuttgart NRG (Nuclear Research and Consultancy Group)

SIA (Structural Integrity Associates)

VTT (VTT Technical Research Centre of Finland)

KIWA (Kiwa Inspecta Technology AB)

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 6

xLPR

PRELIMINARY RESULTS DETERMINISTIC PROBLEM 2 7

Time to First Leak (months) 150 200 250 300 350 400 450 500 Time to Rupture (months) 150 200 250 300 350 400 450 500 xLPR

LOOKING FORWARD 8

Much More to Come!

ML21230A356