Buried Pipe Integrity 

InitiativeFollow-up ActionsFebruary 24, 2010Bo ClarkProgram Manager-Balance of PCorrosion, EPRI
Topics

– Transfer of ‘lessons learned’ to new plants – Incorporation of new materials into buried pipi

program guidelines 

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• New nuclear power plants must overcome a number of 

regulatory, economic, technical, and social challenges prior to becoming a reality

• Program efforts focused around:

– Transferring technology to new plant designs– Facilitating standardization across the new fleet

Advanced Nuclear Technology Program Objectives

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Facilitating standardization across the new fleet

– Ensuring top plant performance from start of operations– Reduce overall deployment risk and uncertainty
Utilities Requirements Document, Rev. 1

Project Description• URD Revision 10 includes targeted technical updates to the follow

areas:

– Instrumentation and Control, Seismic Analysis and Design, S

Design, Service Water System

• Revision 10 also includes updates to Volume 3 - Evolutionary Pla

chapters in the following key technical areas:

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– Materials, Radwaste, Water Chemistry, Electrical Cabling, En

Qualification, Spent Fuel and Reliability of Equipment

Value

• The URD is a valuable product for EPRI member utilities to be us

of:

– The procurement specification for the new nuclear plants– Evaluation of new nuclear plants (comparison of design versu

requirements) 

– As guidelines in the construction, operation, and maintenance 

and new nuclear plants.
New Plant “Buried Asset” Management

• Tech Advisory Committee – meeting April 13th, 2010

– New build engineering managers and directors– Objectives

• Vehicle for collecting technical, regulatory and stand

issues for the new build

• Establishing future project portfolios

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Establishing future project portfolios

• Comment on proposed projects’ scope

• Proposal for upcoming TAC meeting

– Buried Pipe– Cables– Underground tanks– Cathodic Protection System design– As-built drawings
Technical Basis for HDPE Above-Ground 

Summary of Issue• There is no ASME approved code case for above-ground HDPE 

has been developed for below-ground use only 

• Several new plant designs plan on using HDPE for above-ground Potential Benefit of Project• Use of HDPE for above-ground applications will require developm

appropriate design and construction rules, along with determining engineering and material properties needed to ensure safe and red i d ti

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design an

d operation

• Critical technical issues that will be addressed include: 

– seismic qualification (including vents and drains) – large displacements and interactions during thermal expansio

transients

– fire– structural damping values– damage during operations
Newer piping materials

• The EPRI/BPIG recommended program

“Recommendations for an Effective Prograto Control the Degradation of Buried Pipe”, Dec 2008 – Report # 1016456

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–Periodic updates (update in progress)

• Guidance for concrete pipe• Industry feedback from use• Recognize need to address newer materials

– Current focus on approval for use in code 

applications
Together...Shaping the Future of Elect

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