Recent News
SNAP Version 2.6.7 Released
January 15, 2018
AptPlot 6.8.0 Updated
February 19, 2018
PyPost 1.3.3 Released
February 19, 2018

FRAP Plug-ins (FAST, FRAPCON and FRAPTRAN)

Fuel Analysis under Steady-state and Transients (FAST) a Fortran-based computer code that calculates the steady-state and transient response of light-water reactor fuel rods during long-term in-reactor burnup, up to and including dry storage conditions. The code calculates the temperature, pressure, and deformation of a fuel rod as functions of time-dependent fuel rod power and coolant boundary conditions.

The FRAPCON code calculates the steady-state response of light water reactor fuel rods during long-term burnup. The code calculates the temperature, pressure, and deformation of a fuel rod as functions of time-dependent fuel rod power and coolant boundary conditions. FRAPCON is designed to generate initial conditions for transient fuel rod analysis by the FRAPTRAN computer code

The FRAP installation package for SNAP includes both the FAST and FRAPTRAN plug-ins. The legacy FRAPCON plug-in has been superceded by the FAST plug-in. The FAST plug-in will open legacy FRAPCON models and can be used to run FRAPCON.

Change Log

Version 3.2.3 - Released 11/20/2018:

  • Support was added for writing input for the new FAST to TRACE  (makechan file) input file. Additionally, the FAST job step will provide support for this new file.
  • The Rod Design Initial Fill Gas Type property now allows selection of a Sodium option.
  • The Fuel Pellet component now provides “No Dish or Chamfer” as an option for Pellet Geometry.
  • A new Coolant Geometry Mode has been added to the coolant geometry in the coolant conditions component which filters out properties specific to the mode selected.

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