The results of preliminary tests on tritium and neutrons from palladium cathodes during D2O electrolysis are presented. The few positive results obtained from many tests are discussed. Neutron and tritium signals are not obtained in the same experiment, but significant limits (5 × 105 to 1 × 107) are established for the tritium-to-neutron ratio due to the precision in tritium measurements and the stability of neutron detectors.