Recent News
SNAP Version 2.6.8 Released
February 10, 2019
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 The legacy FRAPCON plug-in has been superceded by the FAST plug-in.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 3.3.0 - Released 2/28/2019:

  • A new geometry editor has been added to the Rod Design component. This dialog provides a visual way to edit the inner radius, fuel, gap, cladding, coating, and crud dimensions. It provides a 2D representation of the fuel pellet with a distance scale and provides zoom and translation features. This new visualization can be displayed either as a planar or linear view and provides standard undo redo functionality.
  • The Fuel Pellet and Rod Design components have been updated to improve property naming and grouping. Additionally, the Fuel Pellet component has been renamed to "Materials".
  • Support has been added for the new cladding type SIGMA (icm=12).

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