Energy, Information, and Strategic Management
 NAC Worldwide Consulting

NAC Worldwide Consulting Offices

Atlanta
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a division of
NAC International

  
Stoller Nuclear Fuel

Recent NAC Stoller Nuclear Fuel Reports and Projects

For more information, please contact Geoff Varley at + 44-1491-636-284 or Chris Rusch at (678) 328-1222.

Comprehensive Independent Assessment of GNF-A P8 Cladding

On behalf of an international group of BWR utilities, NAC Stoller is performing an comprehensive independent assessment of Global Nuclear Fuel-Americas' new P8 cladding material. The review includes:

bullet Similarities and differences between P8 and earlier cladding materials, manufacturing processes, etc.
bullet The nature of the changes from earlier designs and the bases for these changes
bullet Experimental and in-reactor performance
bullet Qualification program
bullet Compatibility with BWR water chemistry
bullet Expected performance under actual operating conditions

 

 

 


Participation in the program is still open to utilities operating BWRs.

Comparative Study of Zr-Based PWR Materials

bullet Counterpart to BWR Cladding Project (Completed 1999)
bullet International, Multi-Utility Sponsored Program
bullet Provides Independent Assessment and Comparison of all Current, Advanced Alloy Materials
  Cladding, Spacer and Guide Thimble Materials
  Westinghouse (Electric, Atom and CENP) and Framatome ANP (Framatome, Siemens)
  Evaluation and Inter-Comparison of:
    - Fabrication, qualification and testing
    - Corrosion, hydrogen uptake
    - Creep, growth and mechanical performance
    - Irradiation effects on microstructure and properties
   
bullet Includes Conclusions and NAC Stoller Perspectives
bullet Report is Currently Available (CD + Color Hardcopy)

 

 

 

 

 

 

 

 


Advanced Cladding and Structural Materials Evaluated

Alloy
Vendor
Original Supplier
Country of Origin
Clad Design
M5 Framatome ANP s.a. Fragema

France

 Monotube
PCA-2b Framatome ANP GmbH Siemens Germany Monotube
DX ELSO.8b Framatome ANP GmbH Siemens Germany Duplex
DX D4 Framatome ANP GmbH Siemens Germany Duplex
DX HPA-4 Framatome ANP GmbH Siemens Germany Duplex
Zr1Nb Framatome ANP GmbH Siemens Germany Monotube
DX Zr2.5Nb Framatome ANP GmbH Siemens Germany Duplex
ZIRLO Westinghouse Westinghouse USA Monotube
Duplex 3b+ Westinghouse Atom ABB Atom Sweden Duplex
Allloy A Westinghouse CENP ABB-CE USA Monotube
OPTIN Westinghouse CENP ABB-CE USA Monotube


Experimental Program at Studsvik, Sweden


bullet Project management on behalf of Japanese utility customer
bullet Measurements of the properties of a number of cladding types for
  Hydrogen uptake performance
  Mechanical behavior during a simulated PCI transient
bullet Report issued June 2001

 

 

 

KKL Lead Use Assembly Intercomparison Project under EPRI Robust Fuel Program

bullet GE14, ATRIUM™ 10, SVEA-96 Optima LUAs in KKL reactor
bullet Poolside and hotcell investigations
bullet Analysis of results, reporting by NAC Stoller

Member of Energy Northwest Corrosion Task Force


Investigation of CILC-like nodules and high uniform corrosion on BWR fuel in Columbia Generating Station (WNP-2).

Root Cause Investigation of LUA Assembly Failure at Sequoyah 2


Assisted PWR utility with coolant chemistry analysis and evaluation of possible cause of failure.


Design Review of Proposed High Burnup Fuel Designs for an Asian Utility



Manufacturing Records Review in Connection With Failures in Browns Ferry 2

High Burnup Dry Storage Topical Report

Objective: NRC License for NAC International’s UMS™ Dry Storage Cask to accept High Burnup Fuel (55 GWd/tU) Assemblies. Approval of Revised Creep Strain and Hydrogen Content Limits for the Cladding:

bullet In support of NAC International spent fuel storage container design
bullet Experimental data supports relaxation of current NRC limits
bullet New creep methodology developed and benchmarked against data
bullet Topical Report Submitted to U.S. NRC September 2001
  Currently under review by NRC





Seminar on Characterization of Spent Fuel for Dry Storage for FP&L and SNOC


Comprehensive Analysis of International Fuel Fabrication market for SNOC and Exelon

Assistance in Failed Fuel Investigation and Root Cause Analysis for Exelon Generation, Progress Energy and Southern California Edison
COPAG

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