The　effect　of　minor　actinides　(MA)　on　kinetic　parameters　and　reactivity　coefficients　in　an　accelerator　driven　system　(ADS)　is　analyzed　in　this　paper.　The　Italian　XADS　reactor　with　(U,Pu,MA)O-2　fuel　is　considered　as　the　case　study　of　the　problem,　which　consists　of　a　subcritical　liquid　metal　reactor　and　a　proton　accelerator.　A　new　Monte　Carlo　method　is　applied　to　calculate　the　kinetic　parameters,　i.e.,　effective　delayed　neutron　fraction　(beta(eff)),　mean　neutron　generation　time　(Lambda).　Furthermore,　Doppler　coefficient　(alpha(D))　and　coolant　feedback　coefficient　(alpha(C))　are　obtained　by　calculating　effective　multiplication　factors　(k(eff))　at　various　temperatures.　To　verify　the　adopted　method,　calculations　are　performed　on　several　benchmarks.　The　calculated　values　of　the　new　method　are　compared　with　those　obtained　from　prompt　method,　1/v　absorber　method　and　reference　data.　The　results　show　that　the　new　method　could　accurately　calculate　kinetic　parameters　for　both　critical　reactors　and　subcritical　reactors　with　an　external　source.　The　different　percentage　of　MA　in　the　fuel　is　studied　to　determine　its　effect　on　kinetic　parameters　and　reactivity　coefficients　for　XADS.　When　the　content　of　MA　reaches　5%　in　the　fuel,　the　values　of　beta(eff)　and　Lambda　decrease　by　about　18%　and　31%,　respectively.　With　the　increase　of　MA　content　from　0　to　5%,　the　value　of　(alpha)　over　bar　(D)　varies　from　-0.56　pcm/K　to　-0.36　pcm/K,　and　the　value　of　(alpha)　over　bar　(C)　varies　from　-2.11　pcm/K　to　-1.73　pcm/K.　(C)　2015　Elsevier　Ltd.　All　rights　reserved.