ML022470274

NRC Staff'S Handout for 08/08/2002 Meeting with Dominion VEPCO (Enclosure 1), Dominion Vepco'S Graphs on Total Number of Flow Accelerated Corrosion Events (Enclosure 2)

ML022470274
Person / Time
Site:	Surry, North Anna
Issue date:	08/29/2002
From:	Office of Nuclear Reactor Regulation, Virginia Electric & Power Co (VEPCO)
To:
Burton W, NRR/DRIP/RLEP, 301-415-2853
References
Download: ML022470274 (6)

Text

Flow Accelerated Corrosion Predictive Analysis Methoddlogy CHECWORKS Allowable Actual Values Parameter Input Steam rate Velosity Steam quality Op. Temperature CONCLUSION: All values within parameters Enclosure I

Flow Accelerated Corrosion Predictive Analysis Methodology FAC affects carbon steel components in steam cycle where process temperature exceeds 2000 F North Anna and Surry use standardized programs to predict, detect, and monitor for FAC based on EPRI Guidlines EPRI CHECWORKS code is used to evaluate changes

• Conditions are bounded by CHECWORKS parameter ranges

Flow Accelerated Corrosion Programatic Controls

• FAC wear rates based on predictive analysis and actual inspection results:

• Largest wear rate is ??? mils/year

• Largest wear rate found in ??????? system Inspection of susceptible lines will continue and compare predictions with inspection results

Flow Accelerated Corrosion Conclusion

• North Anna and Surry have effective FAC program which monitors susceptible piping for degradation caused by FAC

• Inspection data is incorporated into the FAC program and thus the program is continuously fine tuned

• The FAC program will ensure that components susceptible to FAC will be managed during the period of extended operation

Surry and North Anna

1. Dominion License Renewal Applications Secondary Piping & Component Inspection AMA Chart Title 1200

"-u-Tot4 planned 800 Replacrtlrlts 600 Linear (Total Planned Replacements) 200 0# N 3/4 N 1/4~

7 07-Aug-02 Enclosure 2

Surry and North Anna ODominion License Renewal Applications Secondary Piping & Component Inspection AMA Chart Title 250 200

-Tota Inspection 150 Replace-m

• 100 Linear (Total Ins pection Replacem ents-)-

6 07-Aug-02