How do we know that a given core is operating safely? Power distribution limits. Role of computer models. Calculational model and reactor operation. Core optimization. Equilibrium fuel cycle. Reactivity coefficients and feedback. Regulation of the reactor. Safety issues. Limitations and their respective natures. Maneuvering with the reactor.
Keywords: Reactor operation; operational limits; computer models; core optimization; equilibrium fuel cycle; regulation. Maneuvering. Fission; chain reaction; energy release; heat removal; thermal power; reactor core; fuel; reactor models; technology; reactor core; validation and verification; regulation; surveillance.