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
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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 during scenarios for which there are no detailed procedures or for which procedures are not having their intended effects. Operators must assess the situation and develop response plans as they manage the situation. Scenarios with distracting and interrupting demands Some scenarios may produce a high level of distractions and interruptions, which raises workload and disrupts performance. An example would be a second failure occurring while operators are addressing the first failure. Scenarios that are highly dynamic In dynamic scenarios, the frequent onset of new or changing information makes it difficult to assess plant conditions, plan appropriate responses, or execute complex tasks. In such scenarios, operators have to 18.0-43 Revision 3 – December 2016 6. Analyze Workload and Determine Its Acceptability a. The applicant should identify the method or methods to be used to analyze staff workload and the workload acceptance criteria for each. NUREG/CR-7190 provides guidance regarding the selection of measures for workload, situation awareness, and teamwork. b. The applicant should have a detailed task analysis of the scenarios to be analyzed. Additional Information: To provide reasonable estimates, subject matter experts (SME) should have a detailed analysis of crew tasks so they know not only what tasks need to be performed, but how they are performed. The task analysis should meet the review criteria provided in Section 5 of NUREG-0711, Applicants may use a combination of traditional task analysis methods, along with cognitive task analysis (CTA) methods.8 The latter may be especially useful for cognitive 8 The CTA addresses limitations in current task analysis methods, such as: • Traditional task analysis methods mainly focus on physical activity (observable