ANTIOXI – Advisory Board Meeting Klas Lundgren Page ANTIOXI Description of Work Packages 3 and 4 Klas Lundgren

ANTIOXI – Advisory Board Meeting Klas Lundgren Page Large difference between plants: Influence of HWC, Zn, Cu Ni/Fe, Co, pH, T, (power uprating), decont., etc?

ANTIOXI – Advisory Board Meeting Klas Lundgren Page Example of dramatic increase of radiation fields on non- decontaminated PLR piping in European BWR ( nat Zn  DZO, NWC  HWC, Brass  Ti condenser)

ANTIOXI – Advisory Board Meeting Klas Lundgren Page BWR example: Significant variation in electrochemistry conditions in the circuit needs to be considered

ANTIOXI – Advisory Board Meeting Klas Lundgren Page WP3: Critical evaluation of BWR, PWR and VVER data and benchmarking of proposed model BWRs:  Scandinavian (11)  RW data, FW data, radiation buildup data (outages and online)  Radiolysis modeling (NWC, HWC), Zn, Fe, Cond, decontamination, etc.  Status: Data collection completed, data processing ongoing.  Report: End of March 2007 PWRs:  Ringhals 2/3/4 (Some German PWR(s)? Inc 800, Zn)  RW data, radiation buildup data, pH-control (B/Li), SG material (Inc 600, Inc 690)  Status: Data collection from Swedish PWRs complete  Report: End of May 2007 VVERs:  Finnish and Bulgarian (4)  RW data, radiation buildup data, pH-control (B/K/NH 3 ), SG material (SS)  Status: Data being asked for  Report: End of July 2007 Literature review:  Existing methods to control the activity buildup power plant conditions  Report:

ANTIOXI – Advisory Board Meeting Klas Lundgren Page Example: B2 – RW chemistry data

ANTIOXI – Advisory Board Meeting Klas Lundgren Page Example: B2 – RW activity data

ANTIOXI – Advisory Board Meeting Klas Lundgren Page Example: B2- RHR gamma scan and dose rate data

ANTIOXI – Advisory Board Meeting Klas Lundgren Page B2 – Co ‑ 60 – On-line gamma scan data on RHR pipe compared to reactor water activity

ANTIOXI – Advisory Board Meeting Klas Lundgren Page B2 – Mn ‑ 56 – On-line gamma scan data on RHR pipe compared to reactor water activity

ANTIOXI – Advisory Board Meeting Klas Lundgren Page B2 – Co ‑ 58 – On-line gamma scan data on RHR pipe compared to reactor water Zn

ANTIOXI – Advisory Board Meeting Klas Lundgren Page O2 – On-line monitoring of crud contribution to RHR dose rates (4 locations) compared to reactor water Zn

ANTIOXI – Advisory Board Meeting Klas Lundgren Page Ringhals PWR: Removal of Ni during shutdown transient

ANTIOXI – Advisory Board Meeting Klas Lundgren Page R2: Co58 removal during shutdown transient

ANTIOXI – Advisory Board Meeting Klas Lundgren Page

ANTIOXI – Advisory Board Meeting Klas Lundgren Page

ANTIOXI – Advisory Board Meeting Klas Lundgren Page BwrCrud  LwrCrud The BwrCrud code will be used and modified to also cover PWR and VVER conditions

ANTIOXI – Advisory Board Meeting Klas Lundgren Page WP4: Development and testing of an integrated corrosion and activity buildup model BwrCrud  LwrCrud  Simplified fuel crud model Model implementation from WP1 and WP2  For system surfaces Validation based on WP3 data  BWRs: Zn, NWC/HWC, Low/high Fe, decontamination, etc.  PWRs and VVERs: pH and radiolysis control, SG material, (Zn), shutdown procedures, etc. Deliverables  Report + Scientific publication or full text conference presentation Schedule  During 2008