Document: NUREG-0800
Document ID: 4b0fa4a0-ce32-4f59-9360-9426826a668c
Document Type: srp
Title: Rev. 4 — June 1997
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500496.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
design basis as discussed in section 3(9). BTP HICB-6 provide specific guidance for determining if the timing margins for changeover from injection to recirculation mode are sufficient to allow manual initiation of the transition. Section 3(7) requires in part that the range of transient and steady-state conditions be identified for both the energy supply and the environment during normal, abnormal, and accident conditions under which the system must perform. This information is used in subsequent evaluations. Section 3(8) requires in part the identification of malfunctions, accidents, or other unusual events that could physically damage protective system components or could cause environmental changes leading to functional degradation of system performance, and for which provisions must be incorporated to retain necessary Rev. 4 — June 1997 SRP 7.1-B-4 protective action. This information is used in subsequent evaluations, with special attention given to Section 4.4 of the standard, "Equipment Qualification." Section 3(9) requires in part the identification of the performance requirements — including system response times, system accuracies, ranges, and rates of change of sensed variables — to be accommodated until conclusion of the protective action. The applicant/licensee's analysis, including the applicable portion provided in Chapter 15, should confirm that the system performance requirements are adequate to ensure completion of protective actions. 2. Section 4.1 — General Functional Requirements This section requires in part that the protection system shall, with precision and reliability, automatically initiate protective action for the range of conditions and performance enumerated in Sections 3(7) through 3(9). The applicant/licensee's analysis should confirm that the protection system has been qualified to demonstrate that the performance requirements are met. The evaluation should confirm that the general functional requirements have been