# Keyword:DEPLETION

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DEPLETION ndepl < symb(i), i=1,ndepl>

This keyword causes the code to write the depletion and depletion error for each of the specified nuclides symb(i) at the end of each summary output. The outputs will include three sets of data:

1. The specific depletion rates and uncertainties at the initial time-point of the output summary
2. The integrated depletion with uncertainty bands for the summarised step
3. The cumulative depletion with uncertainty bands for the full, cumulative irradiation so far simulated at the point of the summary output

As an example, from fispQA/Tst_586fis/testresults/simulation3.out at the first output these values are:

   U 235 : depletion rate =  1.19660E+13 atoms/sec,  specific rate =  1.27092E-08/sec +- 3.60827E-01%, cumulative depletion =  2.80004E+18 atoms/sec + 3.60827E-01% - 3.60827E-01%
step depletion =  2.80004E+18 upper=  2.81014E+18 lower=  2.78993E+18 atoms
cumulative depletion =  2.80004E+18 upper=  2.81014E+18 lower=  2.78993E+18 atoms


The keyword can be added for both nuclides in the initial inventory and nuclides without a starting concentration - e.g. plutonium in a fresh fission reactor fuel. Note that the pathways-based UNCERTAINTY methods will determine the total production uncertainty for some nuclide while this uncertainty adds a functionality for the depletion of an initial or built-up nuclide.

< -- Control phase -- >
...
FISPACT
* Title of the simulation
< -- Initial phase -- >
FUEL 3
U235 5.0E+23
U238 9.5E+24
O16  2.0E+25
...
DEPLETION 3
U235
U238
Pu239
...
< -- Inventory phase -- >
...