The studies performed in the frame of a project destined for the search of new (t,n) and (p,n) reactions of interest in nuclear reactors are described. Experimental evidences of the observations of the reactions: 46 Ti(t,n) 48 V, 48 Ti(p,n) 48 V, 52 Cr(t,n) 54 Mn, 56 Fe(p,n) 56 Co, 72 Ge(t,n) 74 As and 74 Ge(p,n) 74 As, are presented. Additional data on some secondary reactions, already characterised for the production of 7 Be, 56 Co, 58 Co, 65 Zn and 88 Y, were also obtained. The significance of these data is discussed.