more realistic reactor simulation?

[pahp]

I just made up an equation relating the reactor temp, coolant temp, rod depth, etc.

We could try to make the simulation more realistic by basing it on some kind of simple reactor model... this would really only affect how fast the reactor "reacts" to simulation changes, what the function is (e.g., how much hotter and how much faster does the temp increase per unit of rod depth reduction)?

This is totally unnecessary, but if there is a nice mathematical model for a simple reactor, it could be fun.