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:
nt Conditions • Consider transients and accidents starting during normal operations, plant startup, shutdown, and refueling • Consider instrumentation and control (I&C) and human-systems interface (HSI) 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 feedwater, loss of service water, loss of power to selected buses or main control room (MCR) power supplies, and safety and relief valve transients) − accidents (e.g., main-steam-line break, positive reactivity addition, control rod insertion at power, anticipated transient without scram, and various-sized loss-of-coolant accidents) − reactor shutdown and cooldown using the remote shutdown system − reasonable, risk-significant, beyond-design-basis events that should be determined from the plant-specific probabilistic risk assessment (PRA) − external events (fires, floods, seismic events, and loss of large area of the plant) 18.0-34 Revision 3 – December 2016 Additional Information: Typically, the most demanding staffing requirements that a shift faces is the first hour of an operational event, before the emergency response facilities can be staffed. Staffing and activating the operational support center (OSC), technical support center (TSC) and the emergency operations facility (EOF) reduce the burden on the shift. The OSC, TSC, and the EOF are typically required to be operational within thirty minutes to one hour of an emergency declaration. The emergency facility staffing would generally include extra senior