Document: NUREG-0800
Document ID: eedf1a7c-578e-463a-9608-b06af6312cf1
Document Type: srp
Title: HUMAN FACTORS ENGINEERING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1310/ML13108A095.pdf
Revision Date: 2023-06
Chapter: 18
Section ID: 18.0
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Content:
ves, confirming the actions before moving to the next step) and completing tasks in time. Scenarios causing prolonged stress Scenarios that require operators to work long working hours on non-routine, stressful tasks. Rapid workload transitions Periods of rapid workload transition are difficult to operators. For example, if an automatic system fails and operators have to suddenly perform the tasks manually, the workload experienced is typically high. Scenarios with significant consequences The potential consequences of the operator’s performance impact workload. If the consequences are significant, then more workload is experienced than if the consequences are less severe. Scenarios with actions having little margin for error When operator tasks require very precise responses with little performance margin, the demands on attention are great and workload high. 18.0-40 Draft Revision 3 – July 2015 Additional Information: Workload can be anticipated to be high for scenarios with the characteristics listed in Table 3. This table is not meant to be comprehensive, and the characteristics identified are not mutually exclusive, but they may be useful for screening scenarios for potential high workload. b. Scenario Definition: For each scenario, the following information should be defined to reasonably assure that important dimensions of performance are addressed: • a description of the scenario and any pertinent prior history necessary for analysts to understand the state of the plant at the start-up of the scenario • specific initial conditions • events (e.g., failures) that will occur during the scenario and their initiating conditions, e.g., based on time, or a value of a specific parameter • dependent tasks related to each primary task • independent tasks that may occur during each scenario • definition of workplace factors, (e.g., environmental conditions) • needs for task support (e.g., procedures and technical specifications) • staffing level