Department of Energy Sponsored Workshop
July 29 and 30th 2003
Bethesda Marriott
Bethesda, MD

INFORMATION

• Proceedings from an International Workshop on Long-Term Extrapolation of Passive Behavior, July 19-20, 2001, Arlington, Virginia. December 2001
• A Compilation of Special Topical Reports - Waste Package Materials Performance Peer Review
• Final Report - Waste Package Materials Performance Peer Review Panel
• FY01 Supplemental Science and Performance Analyses,
  Volume 1: Scientific Bases and Analyses
• Thermogravimetric Thin Aqueous Film Corrosion Studies of Alloy 22; Calcium Chloride Solutions at 150^oC and Atmospheric Pressure
• Prediction of Long-Term Corrosion Damage in High Level Nuclear Waste Disposal Systems
• IGA/IGSCC of Alloy 600 in PWR Steam Generators

BACKGROUND INFORMATION

http://electrochem.cwru.edu/yeager/payerfiles/YMBoyle_051303.pdf
Logic for Evaluating Engineered Barrier Systems: Boyle

#6-KEY SUMMARY SLIDE
This is a key (busy but good) slide. It is referred to in other presentations. Some highlights: time-temp behavior (slow heat up followed by really slow cool down); logic and some typical data to support are presented as inserts; three zones of behavior-above ~120C packages are dry-no corrosion, below ~80C packages are cool-Alloy 22 not susceptible to localized corrosion, intermediate temps-behavior go/no go corrosion depends upon chemistry and conditions on package surface.
#7 Titles of presentations to follow

http://electrochem.cwru.edu/yeager/payerfiles/YMBodvarsson_NWTRB_051303.pdf THE CHARACTER OF THE UNSATURATED ZONE: BO BODVARSSON Unsaturated Zone coupled processes, evolution of chemistry in the rock

Lots of info on amount of water, likelihood of seepage (drips), thermo-hydrologic models.
#3 Schematic of seepage into drift and onto packages (key concept)
#24 Schematic of dry out zone around drifts (key concept)
#27 Schematic of Thermal-Hydrological-Chemical Processes
#38 Ternary Diagram for Pore Water Chemistries
#40 Yucca Mnt pore water chemistries
#50-51 General Findings from Thermal-Hydrological-Chemical Seepage Model
#52-53 Summary and Conclusions
#57 Initial pore water compositions

http://electrochem.cwru.edu/yeager/payerfiles/YMFarmer_NWTRB_051303.pdf MATERIALS PERFORMANCE: JOE FARMER
Effects on corrosion of the waste package and drip shield Summary of overarching strategy

#2-3 Description of three temperature regions (key concept)
#4-5 Zones of susceptibility based on environment and metal (key concept)
#6 Range of corrosion resistance for alloys
#7-8-9 Electrochemical (?E) basis for resistance to localized corrosion (key concept)
#11 Corrosion testing
#13 Dry out test apparatus
#14-15-16-17 Dry out test result (key concept)
#19 Distribution of Yucca Mountain waters
#24-25-26 Cyclic polarization in CaCl2 brines: methods
#31-35-36 Critical temperature for localized corrosion (key concept)
#37-38 Localized corrosion in CaCl2 brine
#41-42-43 Conclusions regards corrosion behavior in three temperature regions

http://electrochem.cwru.edu/yeager/payerfiles/YMBodvarsson_NWTRB_051303.pdf
THE CHARACTER OF THE IN- DRIFT ENVIRONMENT: MARK PETERS
In- drift processes, evolution of chemistry in the drift

#2 Overview of topics
#3 Purpose
#4 Summary
#5-6 Three temperature regions (key concept)
#7 Schematic of evolution of in drift environment
#10 Chemical divide theory (key concept)
#11 Evolution of Brines During Evaporative Concentration
#12 Observed water chemistries at Yucca Mnt
#24-25-26 Evaporative concentration model results
#27 Chloride to nitrate ratio (key concept)
#28 Water evolution paths
#29 Schematic of evaporation and deliquescence processes (key concept)
#30 Deliquescence of salt mixtures (key concept)
#31 Dust Deliquescence
#33 Deliquescence Brines/Dry Out - Testing Program
#35-36 Deliquescence Brines/Dry Out -Result (key concept)
#37 Dust leachate
#39 Committed materials (brought in intentionally)
#44-45-46 Explanation of Three Regions: dry out, transition, low temperature (key concept)