[en] The mean cross sections of the ¹⁰²Pd(n,p)sup(102,102m)Rh and ¹⁰³Rh(n,2n)sup(102,102m)Rh reactions were experimentally determined by irradiating palladium and rhodium samples for 1 week at an equivalent fission flux of 3 x 10¹³ n.cm^-2.s^-1. The equivalent fission neutron flux was determined using six reference threshold reactions [⁴⁷Ti(n,p)⁴⁷Sc; ⁵⁸Ni(n,p)sup(58,58m)Co; ⁵⁴Fe(n,p)⁵⁴Mn;⁴⁶Ti(n,p)⁴⁶Sc; ⁹²Mo(n,p)sup(92m)Nb and ⁵⁵Mn(n,2n)⁵⁴Mn] and appeared to be unperturbed. Thorough radiochemical decontaminations were required in order to separate the sup(102,102m)Rh activities from the high thermal neutron induced palladium, silver and/or iridium activities. The results are compared with the values predicted by empirical relationships. (author)