DLL (Distributed Ligament Length) is a tool to help engineers evaluate the significance of cracks observed in the BWR core shroud and internal piping.
DLL calculates structural margins based on Limit Load Analysis, Linear Elastic Fracture Mechanics (LEFM) Analysis, Elastic Plastic Fracture Mechanics (EPFM) Analysis and Crack Growth Analysis.  The program can be used to evaluate the as-found results from shroud and internal piping inspections, or it can be used as a tool to help determine the required amount of inspection a priori.

In this webinar, the following topics will be discussed:

• Introduction to DLL 3.1
• Flaw models
• Structural margins calculation
• Crack Growth Analysis
• Software demonstration

Presented on: August 19, 2010
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About the Instructors

Dilip Dedhia has a PhD in Materials Science from the Oregon Graduate Center and over 30 years of experience in deterministic and Probabilistic Fracture Mechanics analyses. Dedhia's particular expertise is in fracture mechanics methods, including high-temperature creep fatigue crack growth. He was co-developer of EPRI® BLESS© code for headers and pipes as well as co-developer of EPRI's TULIP© for high-temperature tubing. Dedhia also developed SI's pc-CRACK© 4.0 for general-purpose fracture mechanics analysis.