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ANTIOXI Description of Work Packages 3 and 4

ANTIOXI Description of Work Packages 3 and 4. Klas Lundgren. Large difference between plants: Influence of HWC, Zn, Cu Ni/Fe, Co, pH, T, (power uprating), decont., etc?.

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ANTIOXI Description of Work Packages 3 and 4

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  1. ANTIOXIDescription of Work Packages 3 and 4 Klas Lundgren

  2. Large difference between plants:Influence of HWC, Zn, Cu Ni/Fe, Co, pH, T, (power uprating), decont., etc?

  3. Example of dramatic increase of radiation fields on non-decontaminated PLR piping in European BWR (natZn  DZO, NWC  HWC, Brass  Ti condenser)

  4. BWR example: Significant variation in electrochemistry conditions in the circuit needs to be considered

  5. 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/NH3), 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:

  6. Example: B2 – RW chemistry data

  7. Example: B2 – RW activity data

  8. Example: B2- RHR gamma scan and dose rate data

  9. B2 – Co‑60 – On-line gamma scan data on RHR pipe compared to reactor water activity

  10. B2 – Mn‑56 – On-line gamma scan data on RHR pipe compared to reactor water activity

  11. B2 – Co‑58 – On-line gamma scan data on RHR pipe compared to reactor water Zn

  12. O2 – On-line monitoring of crud contribution to RHR dose rates (4 locations) compared to reactor water Zn

  13. Ringhals PWR: Removal of Ni during shutdown transient

  14. R2: Co58 removal during shutdown transient

  15. BwrCrud  LwrCrud The BwrCrud code will be used and modified to also cover PWR and VVER conditions

  16. 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

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