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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CFR Title: 

Content:
ntify their assumptions regarding the status of these excluded independent actions, e.g., “we have not included drug testing actions in our analysis because we assume such actions will not interfere with the primary control tasks based on administrative procedures.” 5. Construct Scenarios and Assign Operator Responsibilities Applicants should construct scenarios based on combining the primary, dependent, and independent tasks. These scenarios will be used to conduct the workload analysis described in Section 6. Scenario construction should follow the guidance contained in NUREG-0711, Sections 11.4.1.2, Identification of Scenarios, and 11.4.1.3, Scenario Definition) as adapted below. a. Selection and construction of scenarios: The applicant should use the results of Sections 1 through 4 to identify a reasonable set of scenarios for subsequent staffing analysis. A given scenario may combine many of the characteristics identified in the “identification of challenging operating conditions” and other analyses. Five to ten scenarios should be sufficient provided they define what the applicant/licensee believes to be a set of the highest-workload conditions the operator might face. The applicant should use risk and cases of anticipated high workload to screen the scenarios and items contained in the scenarios. 18.0-39 Draft Revision 3 – July 2015 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