Many deuterons can be accumulated in Pd. If the local density of deuterons at Pd lattice defects becomes high enough, Bose-Einstein condensation (BEC) may happen and induce nuclear reactions. In this work, nuclear reactions in Pd induced by BEC are estimated. The equivalent linear two-body (ELTB) method, which is based on an approximate reduction of many-body problems by variational principle, is used for the calculation. Thomas-Fermi and non-linear screening d-d interactions are used for the calculations. The nuclear reaction rates and critical temperatures of BEC are obtained from the ELTB solutions. (C) 2004 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.