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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at are challenging and create high workload using the considerations presented below. Unlike integrated system validation scenario development where all operational conditions identified in the sample are addressed in a scenario, this activity should be focused on identifying conditions that most challenge the minimum staffing level. The objective of identifying these conditions is the evaluation of the minimum staffing level needed to address immediate and short-term actions. Construct Scenarios and Assign Operator Responsibilities (see Section 5) Identify Challenging Operating Conditions (see Section 1) Identify Primary Tasks (see Section 2) Identify Dependent Tasks (see Section 3) IdentifyPotential Independent Tasks (see Section 4) Analyze Workload and Determine Its Acceptability (see Section 6) Develop Conclusionsabout the Acceptability of Workload Levels (see Section .7) 18.0-30 Draft Revision 3 – July 2015 Scenarios that evolve slowly and within time envelopes required to bring in additional staff are easier to address from a staffing perspective. The applicant should consider the following plant conditions, personnel tasks, and situational factors in their sample of challenging conditions for workload analysis. a. Plant Conditions • Consider transients and accidents starting during normal operations, plant startup, shutdown, and refueling • Consider instrumentation and control (I&C) and human systems interface (HIS) failures and degraded conditions that encompass: − The I&C system, including the sensor, monitoring, automation and control, and communications subsystems − common cause failure of the I&C system during a design basis accident (as defined by Branch Technical Position (BTP) 7-19) − HSIs including, loss of processing or display capabilities for alarms, displays, controls, and computer-based procedures − Consider transients and accidents, such as: − transients (e.g., turbine trip, loss of off-site power, station blackout, loss of all