Buried Pipin

• Agenda

– Introductory remarks - NRC– Overview – NRC

– Industry presentations

U.S. Nuclear Regulatory Commission

y p

• NEI• EPRI• INPO

– Other remarks

• NACE

– Questions
Buried Piping Degradation

Bob Hardies, NRR

October 22, 2009
Buried Pipin

Definition of Success for Management of Buried 

Piping

• Degradation of buried piping is managed in a 

h id bl 

U.S. Nuclear Regulatory Commission

manner that provides reasonable assurance t

are no challenges to safe plant operation and unintended releases that adversely impact the environment.
Buried Pipin

Background• There have been multiple instances of degrad

buried piping leaks causing inadvertent releas

radioactive material and petroleum product to 

U.S. Nuclear Regulatory Commission

radioactive material and petroleum product to 

environment at nuclear power plants 

– Some of these leaks have resulted in tritium 

ground contamination at several plants. 

– Some of these leaks occurred in safety-rela

piping
Chairman’s Taskin

• The Commission has directed the agency to t

focused look at the adequacy of current regulacodes, standards and industry initiatives relate

management of degradation of buried pipe

U.S. Nuclear Regulatory Commission

management of degradation of buried pipe(ML092460648). This evaluation may indentifneeded enhancements. 
Staff Action

• NRC staff is developing an action plan to evaluate, as t

relate to plant safety and the health of the environment

– Current regulations

U.S. Nuclear Regulatory Commission

– Codes and standards requirements– Industry initiatives

• Provide action plan to Commission by 12/3/2009.• Plan will include timeframe for complete evaluation.• Once these evaluations are complete the staff will reco

any needed enhancements to regulations, codes, standand practices. 
Technical Appr

• Identification and Scoping

– Importance– Contents– Configuration

U.S. Nuclear Regulatory Commission

• Maintenance

– Cathodic protection and coatings– Inspection
Regulations and G

• 10 CFR 50.55a, “Codes and Standards,”• 10 CFR 50.65, “Requirements for monitoring the effectiveness of ma

at nuclear power plants,”

• 10 CFR part 54.21(a), “Aging Management”• 10 CFR Part 50 Appendix A, “General Design Criteria (GDC)”

– GDC 44, “Cooling Water,” requires provision of a system to tran

from SSCs important to safety to an ultimate heat sink

– GDC 45, “Ins

pection of Coolin

g Water S

ystem,” re

quires desi

gn 

U.S. Nuclear Regulatory Commission

, p g y ,q g

be inspected such as heat exchangers and piping to assure intecapability of the system

– GDC 46, “Testing of Cooling Water System,” requires design to 

appropriate periodic pressure and functional testing

• 10 CFR 20.1406, “Minimization of Contamination”• Regulatory Guide (RG) 4.21, “Minimization of Contamination and Ra

Waste Generation: Life-Cycle Planning,” 

• GL 89-13, “Service Water Problems Affecting Safety-Related Equipm

requests information on how the GDCs are satisfied and provides a mthe staff finds acceptable for meeting the GDCs
Codes and Stan

• ASME Code• NACE Standards

– RP0502-2002 (Standard Recommended Practice, Pipelin

External Corrosion Direct Assessment Methodology 

SP0169 2007 (Standard Practice Control of External Co

U.S. Nuclear Regulatory Commission

– SP0169

-2007 (Standard Practice, Control of External Co

on Underground or Submerged Metallic Piping Systems 

– RP0285-2002 (Standard Recommend Practice, Corrosio

of Underground Storage Tank Systems by Cathodic Prot

– RP0193-2001 (Standard Recommended Practice, Extern

Cathodic Protection of On-Grade Metallic Storage Tank B

• The AWWA (American Water Works Association Denver CO

has standards concerning pipe coatings and linings
Practices

• The industry has programs that address 

management of buried piping. 

– Described in August public meeting– Purpose today 

U.S. Nuclear Regulatory Commission

• Hear a description of industry’s plans, 

programs and schedule for addressing degradation of buried piping to enable thto make an informed evaluation of the scurrent regulations and practices
Buried Pipin

• Identify gaps, if any, in existing regulations, co

standards and practices 

• Close the gaps

U.S. Nuclear Regulatory Commission