The training reactor VR-1 of the Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in Prague is a light water, zero power research reactor with enriched uranium. Its design satisfies the requirement of easy accessibility to the reactor core with respect to education students and training qualified staff for nuclear industry. The pool type arrangement assures quick and easy access to the reactor core, easy insertion and extraction of various experimental samples and detectors, simple and safe manipulation with fuel elements. Light water, used at the same time as the moderator, reflector and coolant, functions also as biological shielding, which enables access to the reactor during operation.