  We present a next-to-leading order QCD calculation of inclusive dijet
photoproduction in ultraperipheral Pb-Pb collisions at the LHC and show that
the results agree very well with various kinematic distributions measured by
the ATLAS collaboration. The effect of including these data in nCTEQ or EPPS16
nuclear parton density functions (nPDFs) is then studied using the Bayesian
reweighting technique. For an assumed total error of 5\% on the final data, its
inclusion would lead to a significant reduction of the nPDF uncertainties of up
to a factor of two at small values of the parton momentum fraction. As an
outlook, we discuss future analyes of diffractive nPDFs, which are so far
completely unknown.
