Conversions related to pressure

[Aero]

How does one count fusions related to energy produced? That is, how does one account for the time factor between Joules and Megawatts?

One pB11 fusion produces 8.7 MeV,
or 1.39E-12 J
which equals 3.861E-22 MWh which is obviously different in MW sec, or MW min.

But we quote power plant capacity in Megawatts, so how many fusions are required by a 100 MW rated power plant?

This relates to pressure because some number of fusion events are required to produce the total energy (power). What is that number of fusions, hence the number of p and B11 ions in the core continuously? We kind of have a handle on the pressures, so core volume is the variable and core radius seems to be about 10% of the radius of the contained volume of the polywell, which is less than the internal radius of the reactor.

[BenTC]

so how many fusions are required by a 100 MW rated power plant?

Assuming 100% efficient conversion...
count = 100MW / 3.861E-22 MWh
count = 2.6E23 / h
count = 7.2E19 fusions per second