SIAM XLPR V1.0 User Guide

Abstract

This document provides an overview of the software structure and user instructions for the Structural Integrity Assessments Modular – Extremely Low Probability of Rupture (SIAM-xLPR) software tool under development at the Oak Ridge National Laboratory (ORNL), which supports the Nuclear Regulatory Commission’s initiative for a new piping system assessment methodology. The new methodology will provide a tool for demonstrating compliance with the regulatory requirement that primary power plants water piping systems exhibit an extremely low probability of rupture (xLPR). SIAM-xLPR is a modular-based assessment tool that incorporates a prototype xLPR model assembled from new and existing fracture mechanics models and software. xLPR represents one of the four subsystems currently installed in the ORNL-developed SIAM Problem-solving Environment. The prototype SIAM-xLPR models and software modules are linked within a probabilistic framework fully developed using open-source languages and software libraries.