Buried/Underground Piping

American Society of Mechanical Enginee

October 9, 2013

Daniel W. Lamond

Automated Engineering Services (AES) Corporation

U.S. NRC and Industry Public Meeting
ASME SCXI Buried Component ActivitiesCommittee Groups Relevant to Buried Compon• TG Buried Component Inspection & Test• TG Evaluation Procedures for Degraded 

Piping

• WG Pressure Testing• Special WG Nuclear Plant Aging Manage• SG Water Cooled Systems• SG Nondestructive Examination• SG Industry Experience for New Plants
ASME SCXI Buried Component ActivitiesCurrent Section XI Rules• IWA-5244, Buried Component Leakage T

– Visual of Annulus– Pressure Decay or Change in Flow– Unimpaired Flow 

• Code Case N-776, Ground Surface Exam

Program (Approved April 2010)

• Code Case N-806 (Approved June 2012)

– Evaluation of Metal Loss for Cl. 2&3 Buried M

Pipe with Back-Fill
ASME SCXI Buried Component ActivitiesTG BCIT – Recent Timeline• November 2010

→ TG Approved by Executive Committee→ Charter Established

• 2011 (January 31, May 9, August 8, November 7)

→ Membership, Interest Groups, Scope, Data Collec→ Initial Action Items & First Code Paragraph Consid

• 2012 (February 6, May 14, August 13, November 5)

→ Identification of Code Areas for Inclusion/Update→ Code Case Alternatives to IWA-5244→ Code Action for BP Risk Ranking and Inspections

• 2013 (February 11, May 13, August 12)

→ Action Items (Definitions, Methods, Fukushima, In→ Letter Ballots (Leakage Testing & Risk Ranking & → Next Meeting in Atlanta on October 28, 2013
ASME SCXI Buried Component ActivitiesTG BCIT – Goals• Consider All Stakeholders• Evaluate the Safety and Functional Impa

Recent Operating Experience

• Compile Industry Group Activities and Gu• Assess and Support Inspection Techniqu

Development

• Codify Best Practices• Publish a Practical, Manageable set of 

Technically Sound Rules for Regulatory Endorsement
ASME SCXI Buried Component ActivitiesTG BCIT – Scope• Buried and Underground Piping & Compo• Commission Activities• Industry Groups (NEI, EPRI, INPO, NACE• TG Charter

– Programmatic– Inspection & Testing– Mitigation, Repair, Replacement– Design and New Plants
ASME SCXI Buried Component ActivitiesTG BCIT – Scope, Phased Approach• Component Classifications

Safety Related• Classed 1, 2, and 3• Non-Classed

Non-Safety Relate• Many Considera

- Function- Impact- Jurisdiction- Owner
ASME SCXI Buried Component ActivitiesTG BCIT – Action Item Status

AI #1 Liaisons – NACE and Section V Initial CoAI #2 Develop Historical White Paper ClosedAI #3 Define Scope Initial CoAI #4 Compile Industry Papers Initial CoAI #5 List of BP Inspection Methods OpenAI #6 EPIX Operating Experience Initial CoAI #7 BPI Initiative Timeline ClosedAI #8 Codify New IWA-5244 Rules OpenAI #9 Risk Ranking Methodology OpenAI #10 Non Mandatory App - IWA-5244 Guide OpenAI #11 Fukushima Lessons Learned ClosedAI #12 IWA-9000 Buried Comp Definition(s) OpenAI #13 Examination Category Tables Open
ASME SCXI Buried Component ActivitiesTG BCIT – AI #5, List of BP Inspection Methods• First Compilation, No Screening Criteria• Next : Industry Survey Results – Bin wha

are currently doing, Lessons Lear

Direct• Visual Inspection• Liquid Penetrant Testing• Magnetic Particle Testing• Guided Wave• Lamb Wave• Remote Field Testing• Magnetic Flux Leakage• UT & Inspection Vehicles• Radiography• Electromagnetic Technology

Indirect• Pipe-to-Soil Potential• Direct Current Voltage • Pearson Survey / Alter

Voltage Gradient

• Close Internal Potentia• Area Potential Earth C• Soil Analysis
ASME SCXI Buried Component ActivitiesTG BCIT – AI #8, Codify New IWA-5244 Rules

AI #10, Non Mandatory App – IWA-5

• Assess Current IWA-5244, Leakage Test

Rules for Buried Components

• Letter Ballot 12-2562, (2) New Code Cas

– For Comment Ballot (Vote: 1-6-0-11)– Theme: Basis for 09-14 in Leakage Testing? 

• Letter Ballot 12-2562, New NM Appendix 

– For Comment Ballot (Vote: 1-6-0-11)– Theme: Basis for Acceptance Criteria and Ho

• August TG Feedback: IWA-5244 okay as 

leakage testing.
ASME SCXI Buried Component ActivitiesTG BCIT – AI #9, Risk Ranking Methodology• Consideration of Current Industry Method• Build off of other SCXI Risk Informed Act• Initial Draft in November Identified Challe

– Scope (Traditional SCXI Exemptions, e.g. sm– Consequence vs. Failure Potential Matrix– Safety Related High, Binning Remaining (Nu

Safety vs. Industrial, Environmental, and Plan

• Letter Ballot 13-392, Risk Ranking Proce

– For Comment Ballot (Vote: 9 Comment Ballo– Theme: Ranking Matrix / Bins, 

Risk-Informed v Practicality Based
ASME SCXI Buried Component ActivitiesTG BCIT – AI #12, IWA-9000 Buried Component 

Definition(s)

• Handout Discussed at February Mtg• One Definition for Buried Components• One Definition for Underground Compone• Resultant Options:

1. Similar to NRC definition from Gall2. Similar to NEI definition from 09-143. Hybrid

• Two Draft Definitions Presented in May M

– Straw vote direction: combine Buried / Under
ASME SCXI Buried Component ActivitiesTG BCIT – AI #13, Examination Category Tables• Consider New Tables

– IWC-2500-1 Category C-_ & IWD-2500-1 Category D-

• Inspect for Degradation, Not Leakage• Reference New Mandatory Appendix for • Sponsors Assigned to Appendix Sections

– Z-1100, Scope– Z-1200, Components Subject To Examination, Risk Ra– Z-2000, Examination Methods– Z-3000, Acceptance Standards (Letter Ballot following – Z-4000, Repair / Replacement Activities (May Mtg: see – Z-6000, Records and Reports
ASME SCXI Buried Component ActivitiesSummary• Strengthening ASME Standards relative t

Buried Component Inspection

• Consideration of Ongoing Industry Activit• Phased Approach to System Scope• Enabling Clear Requirements and Consis

Fleet Implementation