Recent News
SNAP Version 2.6.6 Released
November 7, 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 The legacy FRAPCON plug-in has been superceded by the FAST plug-in.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 3.2.2 - Released 10/29/2018:

  • The new Radial Power/Burnup profile inputs have been added to the FAST plug-in. This includes updates for reading/writing to ASCII, editing using a new Radial Profile editor, and writing to the model notebook.
  • FAST models can now be exported as a model notebook. Model notebooks can be generated via the File menu or the model node's right click menu.
  • The FRAPTRAN plug-in (Version 2.4.0) was updated to support the version 2.0 Patch 1 of the analysis code.

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