Method to Investigate Cognitive Aging Effects in Nuclear Operations Using the Rancor Microworld Simulator

Many nuclear power plant (NPP) operators are close to, or at, retirement age. Since NPP operators are responsible for tasks that engage different and complex cognitive abilities, human factors researchers recently called for an examination of cognitive aging effects and potential interactions with modernized control rooms. One way control rooms are being modernized is by replacing paper-based procedures with computer-based procedures (CBPs). This paper outlines a method for testing the preference and usability of three types of CBPs as a function of age in simulated NPP operations. We will use the Rancor Microworld Simulator, which mimics an NPP control room and allows novices to learn to perform operator tasks quickly. The experiment will have two independent variables: age (young and old) and CBP type (Type 1, 2, and 3). The three types of CBPs vary in levels of embedded instrumentation and controls. We will recruit adults aged 18–25 years (younger group) and =60 years (old group) from the general population. The dependent variables will be preference and usability metrics via survey and simulator logs. All participants will perform two scenario types (start-up and loss-of-feedwater operations) and will be randomly assigned to one type of CBP to guide them through the scenario. We will use analyses of variance to determine whether there is a main effect of age and any age × CBP type interactions on the preference and usability dependent variables.