Recent News
SNAP Version 2.6.2 Released
August 16, 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 The legacy FRAPCON plug-in has been superceded by the FAST plug-in.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 3.2.1 - Released 8/16/2018:

  • The FAST plug-in was updated to support the new PARCS boundary condition file input. This new input allows the FAST analysis code to obtain boundary condition data from PARCS data. The plug-in supports executing FAST jobs with PARCS boundary conditions by either bundling or referencing these files.
  • New cladding type options were added for input flag icm (C35M, C36M, and HT9).
  • A new option was added to allow the user to have the ability to input Weight Percent of Plutonia (comp) as well as the new input variable for Weight Percent of Zirconium (comZr) in the Pellet Isotopic Data table.
  • New input was added to allow the user to specify ECI fluid connections at the outer surface.
  • An issue was resolved which could prevent reading in values from cards which include a number in its name.

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