NRC Information Request

March 30, 2011
NRC Information Request 

 NEI will submit

– Summary over all plants of design and 

leakage information for buried segmen“important” systems

 EPIX s

ystem names

 “Important” underground systems

– Safety related– Licensed material– Environmentally hazardous

 Leakage data from 2007 to 2010
Template – Design Informatio

SYSTEM DESIGN INFORMATION

For underground piping segments in the system:

One or more 

underground 

segments?

Safety 

Related?

Contains Licensed 

Radioactive 

Material?

Contains Environmentally 

Hazardous 

Material?

Predominant material on the exterior side of the piping. Enter "1" for all that apply

Piping Classes Enter a "1" for all that apply

Subjected to Sec XI quarterly O&M flow tests?

System 1 or blank

1,0 1,0 1,0 AL CU C* FE O* P S SS 1 2 3HE 3 1,0

Typical Underground SystemsAux./Emergency Feedwater System (PWR) 0 0 0 00000000 0 0 0 0 0 Auxiliary Steam System 0 0 0 0 00000000 0 0 0 0 0 Carbon Dioxide (CO2) Supply System 0 0 0 0 00000000 0 0 0 0 0 Chilled Water System 0 0 0 0 00000000 0 0 0 0 0 Closed/Component Cooling Water System 0 0 0 0 00000000 0 0 0 0 0 Cooling Tower Blowdown 0 0 0 0 00000000 0 0 0 0 0 Condensate System 0 0 0 0 00000000 0 0 0 0 0 Condensate Demineralizer System 0 0 0 0 00000000 0 0 0 0 0 Condensate and Feedwater Chem. Cntl. Sys. 0 0 0 0 00000000 0 0 0 0 0 CVC/Makeup and Purification Sys. (PWR) 0 0 0 0 00000000 0 0 0 0 0 Demin. Water Storage and Transfer Sys. 0 0 0 0 00000000 0 0 0 0 0 Diesel Fuel Oil System 0 0 0 0 00000000 0 0 0 0 0 Diesel Lube Oil System 0 0 0 0 00000000 0 0 0 0 0 Equipment and Floor Drains System 0 0 0 0 00000000 0 0 0 0 0 Emergency/Standby Gas Treatment System 0 0 0 0 00000000 0 0 0 0 0 Essential Service Water System 0 0 0 0 00000000 0 0 0 0 0 Essential Air System 0 0 0 0 00000000 0 0 0 0 0 Feedwater System 0 0 0 0 00000000 0 0 0 0 0 Fire Protection System (Water) 0 0 0 0 00000000 0 0 0 0 0 Fire Protection System (Chemical) 0 0 0 0 00000000 0 0 0 0 0 
Template – Leakage Informati

LEAKAGE EVENT INFORMATION

2007

Number of 

Events

Initiation, Enter a "1" 

for the initiator of 

each leak

Cause Codes, Enter "1" for the most applicable cause of eac

ID OD ?

Crk

Gal

GC

Lea

Mec

MIC

O

Ovd

0 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 00000000000
NRC Information Request 

 Initial observations

– Variability of interpretation

• System names• Which systems are “important”

– I f ti ill t ith EPIX l 

In

formation will no

t agree with EPIX lea

data or cause codes

– No apparent surprises

 Should submit by end of April
Preliminary General Observatio

2030405060708090

100

Principle Buried Systems

0

10

20

Aux./Emergency Feedwater System ...

Auxiliary Steam System

Closed Component Cooling Water System 

Condensate and Feedwater Chem. Cntl. ...

Condensate Demineralizer System

Condensate Storage and Transfer System

Condensate System

Cooling Tower Blowdown

CVC/Makeup and Purification Sys. (PWR)

Demin. Water Storage and Transfer Sys.

Diesel Fuel Oil System

Diesel Lube Oil System

Emergency/Standby Gas Treatment ...

Equipment and Floor Drains System

Essential Service Water System

Feedwater System

Fire Protection System (Water)

Fuel Oil Storage and Transfer System

Fuel Pool Cooling and Purification System

Gaseous Waste Management System ...

High Pressure Core Spray System (BWR)

HPSI System (PWR)

Hydrogen Supply System

Hydrogen Water Chemistry System

Instrument Air Supply System

Liquid Waste Management System

Lube Oil Storage and Transfer System

Lube Oil System

Nonessential Service Water System

Offgas System (BWR)

Potable Water Distribution System

Raw Water Makeup System

Reactor Core Iso. Cooling Sys. (BWR)

RHR/LPSI System (PWR)

Sanitary Waste Processing System
Preliminary General Observati

30354045

Leak Cause Codes by Year

05

10152025

2007 2008 2009 2010
Preliminary General Observatio

25303540

Leak Initiators by Year

05

101520

2007 2008 2009 2010
Preliminary General Observatio

500600700

Materials of Fabrication

0

100200300400

AL CU C FE O P S 
Preliminary General Observatio

30%35%40%45%50%

Percent of Buried Segments by Classification

0%5%

10%15%20%25%

30%

SR Rad Ha