Post on 19-Jan-2016
transcript
December 4, 2009December 4, 2009
Men carry the seeds of their own destruction in the genes present in their sperm, research suggests. Scientists working on mice have highlighted a specific gene that, although carried by both sexes, appears to be active only in males. They believe it allows males to grow bigger bodies - but at the expense of their longevity. The study, by Tokyo University of Agriculture, appears in the journal Human Reproduction.
Ch. 16 (wastes) & 17 (water pollution)
Men's genes 'may limit lifespan'
% by Volume
% by radioactivity
Types of Radioactive Waste
Low Level from hospitals, labs and
industrypaper, rags, tools, clothing,
filters
Transuranic (intermediate) resins, chemical sludges,
reactor components
High Levelspent fuel, nuclear weapons
Fuel: 56,000 MTDefense: 11,000 MTTotal: 67,000 MT
ceramic Synroc
How is HLRW Stored?
Liquid Solid
VitrificationSynroc
Management of Wastes
Long term options (potential problems?) bury in ocean floor launch into spaceput in polar ice sheetssubduction zonesbedrock caverns
• ‘delay-and-decay’
Underground Storage
Multiple Barrier Concept Host rock
• stable geology • low porosity & permeability, unfractured
– e.g., granite, basalt, tuffs, shale, salt domes Engineered barriers
• canisters, shielding, backfill Solid waste form
• vitrified or ceramic form reduces mobility
• Dry climate, remote location, stable geology, deep water table, welded tuffs, Nevada Test Site (NTS)
• Underground repository must safely isolate highly radioactive nuclear waste for at least 10,000 years.
Why Yucca Mountain?
3-D image of YM with tunnels
PerforatedPerforatedSheetSheet
Water table ▼
YM Geologic Cross Section
S. Finsterle
Seepage Studies Capillarity and evaporation Boiling and drying Fracture sealing
J. Birkholzer
T. Kneafsey