EPRI

Buried/Underground 

Activities Upda

David SmithProgram Manager-Balance of PNRC/Industry Meeting on BurOctober 20, 2011 White Flint, 
Today’s Discussion

• NEI Inspection Planning Guidance or Reas

Assurance Document Update

• EPRI Buried and Underground Piping Activ

–Plant Engineering Activities

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Plant Engineering Activities

–NDE Activities
Background-NEI-Inspection Planning Gu

• Develop an approach to meet the intent of 

Industry Initiative

• Reasonable Assurance Technical Advisor

A h h d b d l d b 2 Utiliti

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•

Approac

h

h

a

d

been 

develope

d

by 

2 Utilitie

• Draft reviews, webcast and conference ca• Several levels of review and approval
Inspection Planning- Overall Approach

•Reasonable Assurance / 

Inspection Planning Guidance is a Graded Process that involves:

– Inventory and Risk Ranking

C t Li G i

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–

Crea

te Line 

Groupings

– Indirect inspection samples– Direct examinations– Feedback for overall program

Effective use of resources through graded pr

focused and quality inspections
Current Status and Future Plans

• Final Draft “Approved for Use” released Ap

2011

• Revise Guidance Document to incorporate 

underground piping and tanks

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– Review by NEI BPITF– Review by NEI BPIWG

• Provide clarifications as needed•Issue as an Appendix to NEI 09-14
• Programmatic Support and Training

• Condition Assessment• Analysis

Buried Pipe Activities - Update

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• Mitigation and Arrest of Corrosion• Repair and Replace
• Programmatic Support and Training

– Buried Pipe Integrity Group (BPIG)– Cathodic Protection Users Group– Cathodic Protection Training

Buried Pipe Activities - Update

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– Job Targeted Cathodic Protection Training

– Buried Piping Reference Document (Rev 1)– Buried Piping Recommendations Document (R– Buried Piping Inspector Training Course– Buried Pipe Inspection Results Database
• Industry database developed to leverage In

Results

• Collect affirmative as well as adverse inspe

results

Buried Pipe Inspection Results Database

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• Phase I is operational• Match similar parameters• Optimize inspections
• Condition Assessment

– Evaluation of Indirect Assessment Techniques 

Coating Flaw Detection

– Guidance for the Evaluation of Buried Pipe in 

Use of Leak Detection for Providing Reasonab

Buried Pipe Activities - Update

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– Use of Leak Detection for Providing Reasonab

Assurance

– Other NDE focused projects described in d
• Analysis

– BPWORKSTM revision to include undergrou

and tanks

– Guidance on Corrosion Rates for buried piping

Support of ASME Code work for development 

Buried Pipe Activities - Update

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– Support of ASME Code work for development 

Rules and Fitness for Service code cases
• Mitigation and Arrest of Corrosion

– Coating Replacement Options for Buried Pipe– Coating Aging Study of Coal Tar Epoxy and C

EnamelCathodic Protection System Design Specificat

Buried Pipe Activities - Update

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– Cathodic Protection System Design Specificat– Update NMAC Guide on Cathodic Protection
• Repair and Replace

– High Density Polyethylene (HDPE) Material Te– Repair of ASME Class 3 Metallic Buried Piping– High Density Polyethylene Workshop with ASM

Buried Pipe Activities - Update

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– NDE Assessment of Cold Fusion in High Dens

Polyethylene Joints

– Use of High Density Polyethylene for Above G

Applications
Assessment & Development of Buried Pipe 

NDE Technology

Objective / Benefits• Benchmark buried pipe NDE capabilities• Constructed mock-ups to assess technology• Resources for vendors to tweak 

technolo

gies and procedures 

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• Facilitate vendors understanding of nuclear 

industry requirements

• Provide utility support in implementing 

technology
Assessment & Development of Buried Pipe ND

Technology

Mock-ups• Built 4-in, 6-in, 8-in, 10-in, 

16-in and 24-in diameter mock-ups

• Acquired field removed 

samples

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Buried Pipe NDE Mock-ups

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Buried Pipe Reference Guide Report

Buried Pipe NDE Reference Guide (EPRI Repor• Overview of available buried pipe NDE technolog

– In-line and outside pipe application

– Eleven NDE technologies

– Identifies limiting conditions and configuration

G id t h l l ti

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•

G

uidance on 

tec

hnology selection

• Living Document – 2011 Revision to include

– New technologies– Update on reported technologies– Overview of internal NDE tool launch and retr
Recent Internal Ultrasonic Tool Assessm

• Quest Integrity InVistaTM Free 

Swimming internal ultrasonic 

– Widely used in other industries– Designed to navigate Short 

Radius - 1D - 180° bends 

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– Transducer array provides 

100% coverage

– Imaging of ultrasonic data– On-board data collection– Not tethered
Recent Internal Ultrasonic Tool Assessm

Example of corrosioaround pipe suppor

Quest Integrity)

© 2011 Electric Power Research Institute, Inc. All rights reserved. 18
Recent Internal Ultrasonic Tool Assessm

Assessment Conducted on 60-ft long 8-in DiameteMock-up

– Examined in <1 minute– Full coverage of straight 

pipe sections

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– Identified inside outside 

surface connected discontinuities
New Technologies

Phased array probes• Advantages

– Rapid scanning– Greater sensitivity to sharp flaws such as 

pitting

Impro ed depth and e tent si ing

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2-in wide a

ultrasonic e

– Improved depth and extent sizing– Provides depth imaging– Permanent data storage

• Status

– Identified technology in aerospace industry – Vendor demonstrated on EPRI mock-up– Purchasing probe 
Standardization of Guided Wave Pipe 

Procedures Guidance

Successful application of NDE typically based on codestandards or EPRI guidance. Guided wave lacks such • Utility and guided wave service providers requested EP

procedure guidance to obtain:

– Consistent technology application 

– Repeatable results

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Repeatable results

– Uniform expectations

• Status

– EPRI has identified essential variables– Developing guidance– To meet with utility and service providers to gain con

• Guidance to be added to the EPRI 1019116: Buried Pip

Wave Examination Reference Document
Development of Guided Wave Personnel 

QualificationsGuided wave personnel qualification Codes and Stcurrently do not exist. EPRI is engaged in NDE indmovement to create such requirements:

– American Society of Nondestructive Testing (ASN– American Society of Mechanical Engineers (ASM

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• Drafted Article 18 under Section V to establi

guided wave as a method for testing piping

– British Institute of Non-Destructive Testing PCN

• Independent body has drafted a scheme for 

certification and qualification of guided wave personnel
Guided Wave Computer Modeling and 

Empirical Study

Guided Wave Numerical Modeling: 

– Alternative to building mockups– Optimize data acquisition setups– Data analysis tool

– Trainin

g and testin

g resource

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g g

EPRI Guided Wave Modeling Work

– Working with PRCI, TWI, SwRI, and Penn State Un– Issuing report on results of modeling assessment i

• Acquired guided wave data on piping mock-ups• Laser profile of discontinuities• FEM model of laser profiled discontinuities• Modeling data consistent with empirical data
In-line Examination of Intermediate Diam

Piping

EPRI Developed Technology• Develop instrumented robot for the examination of p

with minimal facility modifications for diameter range 30”

• Provide utilities with cost effective tooling to determin

pipe wall thickness conditions

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p p

Current Status• Robot development completed• Demonstration in Seabrook 

mockup completed
Future Buried Pipe NDE Work

Guided Wave• Develop a basis for obtaining credit as a direct exa

– Identify necessary parameters and essential var– Identify performance indicators for above to show 

reliable examination was achieved

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reliable examination was achieved

• Buried Pipe Structural Health Monitoring (SHM)• Buried Pipe Data Analysis DevelopmentNDE Technology Assessment• Facilitate Field Trials• Continued to assess and development NDE techno
• Increased focus on Coatings and Cathodic Pr

– Increased Technical Knowledge– System Performance– Supports Mitigation and Restoration Methodologies

• NDE Technology Assessments

Summary - Buried Pipe Activities

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– Updated Reference Guide– Technology Capability Demonstrations– Transition from OD inspection to ID inspections– Guided Wave

• Data Analysis• Structural Health Monitoring• Obtaining Credit for Exams
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Together...Shaping the Future of Elect

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