Abstract. In this study, reaction cross–section calculations of 58 Ni(d,n) 59 Cu, 60 Ni(d,n) 61 Cu, 60 Ni(d,2n) 60 Cu, 61 Ni(d,n) 62 Cu, 62 Ni(d,2n) 62 Cu, 64 Ni(d,2n) 64 Cu reactions have been done with TALYS 1.6, EMPIRE 3.1 and ALICE/ASH computation codes for reactor structural materials 58,60,61,62,64 Ni. Two Component Exciton and Equilibrium models of TALYS 1.6 and Exciton model of EMPIRE 3.1 have been used while Geometry Dependent Hybrid and Weisskopf Ewing models of ALICE/ASH have been selected for calculations. Also, by using Constant Temperature Fermi Gas, Back Shifted Fermi Gas and Generalized Superfluid models of TALYS 1.6, level density calculations for the selected reactions have been completed. All computations have been compared with the experimental values exist in the literature. Keywords : Reaction cross–section, Level density, GEANT4, Stopping power, Nickel, EXFOR Ozet. Bu calismada, 58 Ni(d,n) 59 Cu, 60 Ni(d,n) 61 Cu, 60 Ni(d,2n) 60 Cu, 61 Ni(d,n) 62 Cu, 62 Ni(d,2n) 62 Cu, 64 Ni(d,2n) 64 Cu reaksiyonlari icin TALYS 1.6, EMPIRE 3.1 ve ALICE/ASH hesaplama kodlari kullanilarak reaktor yapi malzemelerinden olan 58,60,61,62,64 Ni icin reaksiyon tesir kesiti hesaplamalari yapilmistir. TALYS 1.6’nin Iki Bilesenli Eksiton ve Denge modelleri ile EMPIRE 3.1’in Eksiton modelleri kullanilirken ALICE/ASH’in Geometri Bagimli Hibrit ve Weisskopf Ewing modelleri hesaplamalar icin secilmistir. Ayrica, TALYS 1.6’nin Sabit Sicaklik Fermi Gaz, Geri Kaymali Fermi Gaz ve Genellestirilmis Superakiskan modelleri ile seviye yogunlugu hesaplamalari secilen reaksiyonlar icin tamamlanmistir. Tum hesaplamalar, literaturde mevcut olan deneysel degerler ile karsilastirilmistir. Anahtar Kelimeler : Reaksiyon tesir kesiti, Seviye yogunlugu, GEANT4, Durdurma gucu, Nikel, EXFOR