fission product density

rhema8686

How do you calculate the total fission product given the fuel type, volume and power density of the reactor?
assuming it's a BWR and homogenous mixture of fuel and coolant. what's the simplest way to find it?

edgepflow

I am not sure I totally understand your question, but the fission rate could be estimated from your givens as follows:

Power = power density X volume

There is about 200 MeV of energy generated per fission. So dividing the power by 200 MeV per fission should give you fissions per unit time.

Astronuc

One would noramlly use a core simulation code that tracks the fission product inventory.

Otherwise, one has to estimate the fuel burnup and determine from fission product yields, in either equations or tables, what the fission product inventory would be.

Normally one can take the power (MWt) and integrate over time and divide by the mass to get a core average burnup. However, one must bear in mind that the core has different batches/regions of fuel with different burnup levels at BOC and different burnup accumulation rates (a consequence of different power generation rates).