Document: NUREG-0800
Document ID: fafcb45b-b0e5-49ad-9a69-0de2e8975189
Document Type: srp
Title: describes the general procedures to be followed in reviewing any I&C system. Section 7.5
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500506.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
ided in NUREG-0737, Supplement 1, "Clarification of TMI Action Plan Requirements — Requirements for Emergency Response Capability," with respect to PAM, ERF, and SPDS. The information systems review should address the topics identified as applicable in Table 7-1. Appendix 7.1-A describes review methods for each topic. Certain guidance documents identified in Parts 3 and 4 of Table 7-1 apply only to BISI or PAM, but not both. The guidance documents that are not applicable to a specific system are identified below. Major design considerations that should be emphasized in the review of the information systems important to safety are identified below. 1. Recommended review emphasis for PAM • Conformance with Reg. Guide 1.97 and BTP HICB-10. • Use of digital systems — See Appendix 7.0-A. • Emergency operating procedures (EOP) action points — A basis should be provided for EOP action points that accounts for measurement uncertainties. Draft Reg. Guide DG-1045, the proposed revision 3 to Reg. Guide 1.105, "Instrument Spans and Setpoints," provides acceptable guidance for establishing these uncertainties. • Monitoring for severe accidents —The accident monitoring instrumentation should be demonstrated to perform their intended function for severe accident protection. They need not be subject to additional 10 CFR 50.49 environmental qualification requirements. However, they should be designed so there is reasonable assurance that they will operate in the severe-accident environment for which they are intended and over the time span for which they are needed. 2. Recommended review emphasis for BISI • Scope of BISI indications — As a minimum BISI should be provided for the following systems: – RTS and ESFAS — See Appendix 7.1-B item 14 and Appendix 7.1-C item 13. – Interlocks for isolation of low-pressure systems from the reactor coolant system — See BTP HICB-1. – ECCS accumulator isolation valves — See BTP HICB-2. – Controls for changeover of