Fast neutron fluence under depletion

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1

Hello,

after we get the neutron flux in each burnup step,

how do we get the fast neutron fluence ( let’s say, above 0.18MeV neutron energy) related to burnup ? (Neutron Fluence VS EFPD)

Thanks,

Deng.

2

If you have the flux at each burnup step, the fluence is just the time-integrated flux. To first order, you can take the flux at the beginning of a timestep and multiply it by the timestep length to get the fluence accumulated over that timestep.

3

Thank you.

Yeah, that’s a compromise to some extent.