Kinetics Options - Default Parameters

Suggest adding in default fuels/reactors to the kinetics options. Perhaps 4 options like: 235-U, 233-U, 239-Pu, and custom. This could also be implemented by allowing the user to select from several predefined options and then make modification, thus negating the custom option.
The current implementation loads defaults from a variety of sources (the beta and lambda info is 235-U). I would suggest, in general, that a consistent set of defaults be made available (perhaps PWR for now). Can also draw some of this info from publicly available FSAR/DCD.

Well I'm no fuels expert, but I understand the beta_i and lambda_i stuff to be characteristic of the primary fissile isotope. So what you have for 235-U is likely acceptable. Still might be useful to protect some of these from the user as 235-U, 233-U, etc. Like I said, I'm not the fuels guys here but we should ask one to see what actually does change from reactor to reactor, core to core, cycle to cycle, etc.
The reactivity coefficients, however, could be made slightly more consistent by using a common source such as AP1000 DCD (I mention this as this is what I am familiar with, not because it it the most useful. As NHES has been interested IRIS, maybe it makes sense to use that as default, but I digress). For AP1000, you could use the material in Ch 4.3, specifically Table 4.3-2. (https://www.nrc.gov/docs/ML1117/ML11171A445.pdf)
The challenge here is that many parameters are expressed as a functions of temperature and/or boron concentration. This implies the use of a separate module outside of PK (or perhaps inside a larger kinetic module) to calculate the effective temperature/parameter and then some sort of look-up table or spline function.
So the rabbit hole is quite deep here.