Document: NUREG-0800
Document ID: f269e894-c94c-4ccb-b41c-6e39aa74f371
Document Type: srp
Title: HUMAN FACTORS ENGINEERING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070670253.pdf
Revision Date: 2023-06
Chapter: 18
Section ID: 18.0
CFR Part: 
CFR Title: 

Content:
(see Section C.2.2 below). HAs in the lowest risk region receive minimal HFE review (see Section C.2.3 below). 18.0-18 Revision 2 - March 2007 C.1 Phase I - Risk Screening C.1.1 Screening Process for Risk-Informed Change Requests If the submittal is appropriately risk-informed, applicants should evaluate the risk associated with the proposed modification and the HAs associated with it. The applicant's risk screening should be evaluated in accordance with the review criteria of “Guidance for the Review of Changes to Human Actions” (NUREG-1764), as summarized in the four paragraphs below. Determine the Risk of the Entire Modification. The first review step is to perform a risk-informed screening of the entire modification, including both equipment and HAs, in accordance with the review criteria of NUREG-1764, for both permanent and temporary changes. As part of this evaluation, the staff should determine whether the PRA information submitted as part of the risk-informed (R-I) submittal is suitable. The review criteria defined in RG 1.174 and SRP Chapter 19 should be used. If the staff determines that the information is not suitable, a generic method screening process should be used (see item C.1.2 below). RG 1.174 notes that licensee applications that lie in Region I of the acceptance guidelines for core damage frequency (or for large early release frequency) are generally not permitted. Proposed changes that are calculated to be in the Region I of three risk regions are identified as most risk significant. If the entire modification is in Region I, the staff determines whether the modification is rejected. If it is rejected, then no additional HFE review is needed. If it is not rejected, the staff determines whether the modification contains only HAs or if it includes both equipment and HAs. If the modification contains only HAs (no equipment modifications) and was determined to be in Region I, then the HA should be reviewed using the Level I criteria in Section