B-11 NMR in ThNi2B2C was performed in the normal state up to 550 K. Th
e measured temperature dependence of nuclear spin-lattice relaxation t
ime and the Knight shift of B-11 in ThNi2B2C show that the antiferroma
gnetic spin fluctuations of Ni are strongly suppressed compared to tho
se in YNi2B2C or LuNi2B2C.