Document: NUREG-0800
Document ID: 96afb1d6-6ce9-41e4-b4ec-1fc7747bc0b2
Document Type: srp
Title: Revision 8 – January 2021
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML2033/ML20339A647.pdf
Revision Date: 2023-05
Chapter: 7
Section ID: 7
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system and whether the applicant demonstrated that the equipment will be BTP 7-19-27 Revision 8 – January 2021 reliable, available, and accessible under the postulated event conditions. The reviewer may use the HFE principles and criteria identified in SRP Chapter 18 to evaluate the applicant’s selection and design of the displays and controls. In addition, the reviewer may use the guidance in NUREG-1764, Revision 1, to perform a risk-informed evaluation of the application. Protective Actions Initiated Solely by Manual Actions Protective actions initiated solely by manual controls must be verified to meet appropriate HFE criteria and to use adequate equipment and controls. RG 1.62 provides guidance for evaluating the adequacy of equipment and controls used to manually initiate protective actions otherwise provided by automatically initiated safety systems. SRP Chapter 18, Attachment A, provides guidance for evaluating credited manual actions. Acceptance Criteria If the following acceptance criteria are met, the reviewer should conclude that the proposed manual operator action is acceptable: a. The proposed manual operator action has been validated as both feasible and reliable, using an HFE process such as that specified in SRP Chapter 18, Attachment A. The application describes human performance requirements and relates them to the plant safety criteria. The application employs recognized human factors standards and design techniques to support the described human performance requirements. b. The SSCs used to support the manual operator action are diverse from the equipment performing the same function within the DI&C system, so that they are not vulnerable to the same CCFs. c. The credited SSC is accessible to the operator during the associated event conditions, capable of functioning under the expected conditions, and is of adequate quality, which may be verified, for example, based on the alternative treatment requirements developed for implementation of 10