Document: NUREG-0800
Document ID: 51b93b24-7bff-4144-949f-36812854b7aa
Document Type: srp
Title: HUMAN FACTORS ENGINEERING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1612/ML16125A114.pdf
Revision Date: 2023-06
Chapter: 18
Section ID: 18.0
CFR Part: 
CFR Title: 

Content:
dentified in the exemption request) 18.0-42 Revision 3 – December 2016 • responsibilities of each operator • communication requirements between control room personnel and remote personnel (e.g., load dispatcher via telephone) c. The applicant’s scenarios should realistically represent operator tasks in the plant; so that the findings from the analysis can be generalized to the plant’s actual operations. One important aspect of this is the timing for plant dynamics and postulated accidents. This would be provided by a full-scope plant simulator later in the design stage, but at the time of initial staffing evaluations, it may need to come from analytic work by the design team. d. When work (e.g., operations, maintenance) external to the MCR must be coordinated with the control room crew, the scenarios should include work associated with such coordination. Table 3: Scenario Characteristics Associated with High Crew Workload Characteristic Considerations Scenarios with Complex Relationships Among Primary Tasks NUREG-0711 Task Analysis Criterion 4 addresses the relationships among tasks, e.g., some tasks can be carried out in any order or in parallel, some tasks have to be performed in a linear sequence, while for others the relationship is conditional (if such a condition exists, perform task A). Some tasks may involve coordinated actions among crew members or control room crew members and local personnel. These relationships can introduce task delays and multitasking requirements that contribute to the complexity and workload of performing primary tasks. Scenarios that are unfamiliar or unusual The scenario is not one that operators encounter frequently or on which they train. Thus, even with procedures the scenario has high uncertainties and operators have to analyze many parameters, select among many possible mental models for the situation, and evaluate multiple outcomes. Scenarios that require knowledge based behavior Knowledge-based task demands occur