[en] Technical papers presented at the ANS Topical Meeting on Advances in Reactor Physics and Core Thermal Hydraulics, September 22-24, 1982, at Kiamesha Lake, NY, are included in these proceedings. Reactor physics, core thermal hydraulics, and the interactions between core physics and thermal hydraulics are covered both for thermal reactors and for fast breeders. There are sessions on current challenges in these areas. On validation of fast reactor thermal hydraulic methods, on reactor theory, on measurement and analysis of thermal reactor physics parameters, on validation of thermal reactor thermal hydraulics methods, and on development and utilization of differential and integral nuclear data