Status of Cermet SNF Cask Development in the US [pres. slides]

32 Pages·2004·0.744 MB·English

Status of Cermet SNF Cask
Development in the United States
Charles W. Forsberg
Russian–American Workshop on Use of Depleted
Uranium and Review of International Science and
Technology Center (ISTC) Projects
October 18–21, 2004
Moscow, Russia
Oak Ridge National Laboratory
P.O. Box 2008, Oak Ridge, Tennessee 37831-6166
United States of America
E-mail: [email protected]
Outline
• Cermet Cask
Description
• Design
• Manufacturing
• Cask Decay-Heat
Removal
• Repository
Behavior
GNS Storage and Transport Cask
OAK RIDGE NATIONAL LABORATORY
U. S. DEPARTMENT OF ENERGY
2
Cermet Cask Description
Cermets Combine the Best Properties of
Ceramics (Shielding, Hardness, etc.) and
Metals (Strength, Ductility, etc.)
Cermets Are
Cermet Body Cross Section
Used for
Demanding
Applications Clean
Steel
Ceramics
- Armor (Al O ,
2 3
Brake Shoes SiC)
- Neutron Shielding
(DUO , Gd O )
2 2 3
- Gamma Shielding
(DUO )
2
Metal Matrix
Main Battle - Strength
Tank Armor
- Thermal
Cask Body
Conductivity
Cutting Tools
OAK RIDGE NATIONAL LABORATORY
U. S. DEPARTMENT OF ENERGY
04-070 4
Cermets are the Enabling Technology
for a SNF Super Cask
(Ceramics in Metal Matrix to Obtain Advantages of Both)
Cermet Al O , Other Ceramics • Radiation Shielding
2 3
Cask
− Gamma: High-Density DUO /Other
Steel (Continuous 2
Phase) − Neutron Moderation/Absorption
SNF Assembly
•Oxygen in DUO
Slot
2
Depleted Uranium
•Carbon in SiC/Other
Oxide
• Assault Protection: Traditional Armor
Cermet
− Ceramic (Al O , Other)
2 3
− Metal
Clean Steel
• Safeguards and Theft
− Large Mass
Armor
− Cermet
Hard Ceramic • Decay Heat Removal
Breaks up
− High-Conductivity Steel Matrix
Projectile
• Geological Disposal
− Criticality (DUO )
Projectile
2
− Chemistry: Enhanced Eh and pH
Ductile Metal
(Fe, Other)
Absorbs
Energy
OAK RIDGE NATIONAL LABORATORY
U. S. DEPARTMENT OF ENERGY
04-100 5
Design
Studies are Underway to Define
Optimum Cask Design
• Cask design dependent upon application:
storage, transport, and/or disposal
• Key questions: What is the optimum cermet for:
− Minimum cask weight?
− Minimum cask dimensions?
− Maximum physical protection?
− Maximum repository performance?
• Cermets (ceramics in metals) create performance
possibilities that have not been previously
explored
OAK RIDGE NATIONAL LABORATORY
U. S. DEPARTMENT OF ENERGY
7
Manufacturing
Low-Cost Manufacturing is the Key
Economic Requirement
• Two options being examined
− Casting (Russia)
− Powder metallurgy (United States)
• Optimum cask may have different parts
made by different processes
• In the U.S, manufacturing studies are
underway to understand the economics
• Initial results in several months
OAK RIDGE NATIONAL LABORATORY
U. S. DEPARTMENT OF ENERGY
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