  We construct a new reduced nuclear reaction network able to reproduce the
energy production due to the photo-disintegration of heavy elements such as Ru,
which are believed to occur during superbursts in mixed H/He accreting systems.
We use this network to simulate a detonation propagation, inside a mixture of
C/Ru. As our reference, we use a full nuclear reaction network, including 14758
reactions on 1381 nuclides. Until the reduced and full networks converge to a
good level of accuracy in the energy production rate, we iterate between the
hydrodynamical simulation, with a given reduced network, and the readjustment
of a new reduced network, on the basis of previously derived hydrodynamical
profiles. We obtain the thermodynamic state of the material after the passage
of the detonation, and the final products of the combustion. Interestingly, we
find that all reaction lengths can be resolved in the same simulation. This
will enable C/Ru detonations to be more easily studied in future
multi-dimensional simulations, than pure carbon ones. We underline the
dependence of the combustion products on the initial mass fraction of Ru. In
some cases, a large fraction of heavy nuclei, such as Mo, remains after the
passage of the detonation front. In other cases, the ashes are principally
composed of iron group elements.
