Methodology for Assessing Pipe Failure Rates in Advanced Water Cooled Reactor (WCRs)

Closed for proposals

Project Type

Coordinated Research Project

Project Code

I31030

CRP

2171

Approved Date

13 July 2017

Status

3 - Active - Ongoing

Start Date

9 February 2018

Expected End Date

8 February 2022

Participating Countries

Canada
Germany
Lithuania
Malaysia
Republic of Korea
Russian Federation
Tunisia
United States of America

Description

The successful deployment of advanced WCR technologies includes the development of design certification probabilistic safety assessment (PSA) studies that among other aspects must also address piping reliability in multiple contexts. Based on five decades of extensive and documented national operating experiences on the pipe failure rates in current Water Cooled Reactors (WCRs) fleet, a new methodology to predict pipe failure rates in advanced WCRs will be suggested. In the absence of operating experience data of the advanced WCRs there is not yet a consensus technical approach of how to predict pipe failure rates in advanced WCRs.  This CRP will provide Member States with an open access to a strong technical basis for establishing plant piping reliability parameters in support of design certification PSA studies, in-service inspection programme development, and operational support. It this way it will bring together the current state-of-knowledge on piping degradation and failures, and will address important area of the predictions of pipe failure rates in suggesting a new methodology consistent with required standards and relevant to deployable advanced WCRs where coordination by the Agency will provide significant added value. Although the focus is on statistical models of piping reliability on the basis of operating experience data in the current WCRs fleet, other approaches to piping reliability parameter estimation, such as probabilistic fracture mechanics approaches, are not precluded from consideration. Additionally, this CRP will enable objective evaluation and the benchmark studies by the participating Member States.  The research activities supported by this CRP will foster national excellence and international cooperation, promote sharing of newly developed knowledge and contribute to capacity building in developing countries.

Objectives

Assist the IAEA Member States in assessment of pipe failure rates in advanced WCRs for improved safety design, promote international cooperation among IAEA Member States through the sharing of expertise and participation in the common benchmark calculation.

Specific objectives

Collect data and analyze the best practices of the existing piping reliability analysis methodologies across the Member States.

Develop course syllabi for training early-career engineers and scientists, and establish the opportunities for PhD dissertations.

Develop new methodology to predict pipe failure rates in advanced WCRs.

Successfully complete the benchmark sets and document lessons learned.

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