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:
. 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 reactor operators. Operating conditions selected need only be carried out far enough to address the period up to when added staffing is in place. Following the March 2011 tsunami-induced loss of all power at the Fukushima Dai-ichi nuclear power plants the NRC issued Order EA-12-049 on March 12, 2012, requiring all U.S. nuclear power plant licensees to implement strategies that would allow them to cope without their permanent electrical power sources for an indefinite period of time. In response, the U.S. nuclear power industry developed and implemented Flexible Coping (FLEX) strategies, consistent with NEI 12-06, Diverse and Flexible Coping Strategies (Flex) Implementation Guide, Revision 1A (ML15279A426). These strategies are based on a three-phase approach: 1) initially cope by relying on installed plant equipment, 2) transition from installed plant equipment to on-site FLEX equipment, and 3) obtain additional capability and redundancy from off-site equipment until power, water, and coolant injection systems are restored or commissioned. Onsite administrative minimum shift staffing levels are assumed for the first two phases. Staffing analyses are to evaluate minimum staffing, so typically these analyses should include Phase 1 and 2 of the selected scenarios. For the second or transition phase, some plants may involve off-site or recalled personnel. If a plant’s mitigation strategy specifies recalled/offsite personnel for selected events, then those events do not need to be included in the staffing analyses for minimum staffing. b. The applicant should consider the following types of personnel tasks: • Important Human Actions – The sample should include all important HAs, as determined in NUREG-0711, Section 7. • Manual Initiation of Protective Actions –