The performance of CMS ZDC detector in 2016

The Zero Degree Calorimeter (ZDC) detects neutral particles in $\lvert\eta\rvert > 8.5$ region. In 2016, the ZDC is cross-calibrated to 2010 dataset. Peaks corresponding to 1, 2 and 3 are visible in the ZDC total signal distribution. The effect of pileup is corrected by a Fourier deconvolution method. Neutron number distribution is unfolded using linear regularization method. The ZDC can be used as an unbiased centrality estimator in pPb collisions - but theoretical models valid at LHC are needed for this. The CMS ZDC is able to measure the spectator neutron multiplicity distribution, which will be a useful information for developing such models.