# Examples and Tutorials

One of the best ways to become familiar with Bison is to start running simulations. To help new users, and returning users looking to brush-up their familiarity, explore Bison, the Bison team provides several examples and tutorials for the different facets of Bison capabilities in projects/bison/examples.

## Typical LWR Analysis Geometries

The geometry and dimension used in a fuel analysis problem represents an optimization between simulation speed and localized detail. Presented below are the three most common geometries used in BISON for LWR fuel rod performance analysis; click on the heading to go to the geometry specific tutorial pages.

## Layered 1D

Provides a quick simulation of a simplified fuel analysis model. Layered 1D models are ideal for simulations in which runtime speed is a prime consideration and localized effects can be neglected.

## 2D Axisymmetric

The yeoman of Bison fuel analysis simulations. 2D Axisymmetric (2D-RZ) simulations are best suited for modeling the axial and radial variations common in fuel while retaining the computational efficiency of a 2D problem.

## Complete 3D

Enables the study of localized effects on the performance of a fuel rod. Full 3D models are most beneficial for simulations of non-symmetric fuel rods, including manufacturing defects on a single fuel pellet surface or localized loading conditions.

The most suitable geometry to use in a fuel rod analysis depends on the details of the specific analysis requirements.

Beyond the light water reactor examples given above, Bison includes tutorials and guidelines for advanced topics, including changing geometry, different fuel rod types, and updating input files to the lastest mechanics capabilities. Click on the headers below to go to the tutorial sections.

## Switching Dimensions

Bison's ability easily upscale and downscale among simulation dimensions allows users to focus both on running a large number of fuel rods and on examining detailed localized effects with similar input files. Tutorials for converting a model between the adjacent geometry dimensions in Bison for a LWR fuel rod are given in this section.