Document: NUREG-0800
Document ID: a8dee0cd-6529-4ac9-b659-26bda40aba48
Document Type: srp
Title: INFORMATION SYSTEMS IMPORTANT TO SAFETY
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159B138.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.5
CFR Part: 
CFR Title: 

Content:
esponse facilities, and the emergency response data system, nonsafety portions of accident monitoring instrumentation, nonsafety portions of BISI, and nonsafety portions of the annunciator systems are appropriately isolated from safety systems. Electrical isolation devices were qualified in accordance with the guidance of SRP BTP 7-11. Therefore, the staff concludes that the isolation of these systems from safety systems satisfies the applicable requirements of 10 CFR 50.55a(h) and GDC 24. The applicant or licensee has also incorporated in the system design the recommendations of Three Mile Island (TMI) task action plan items [identify item number and how implemented] that the staff has reviewed and found acceptable. In the review of the information systems important to safety, the staff examined the dependence of these systems on the availability of auxiliary supporting features and other auxiliary features. Based on this review and coordination with those having primary review responsibility of auxiliary supporting features and other auxiliary features, the staff concludes that the design of the information systems important to safety is compatible with the functional requirements of auxiliary supporting features and other auxiliary features. 2. Note: the following finding applies only to systems involving digital computer-based components. 7.5-14 Draft Revision 6 – August 2015 Based on the review of software development plans and the inspections of the computer development process and design outputs, the staff concludes that the computer systems meet the guidance of RG 1.152. Therefore, the special characteristics of computer systems have been adequately addressed, and the staff finds that the information systems important to safety satisfy these requirements of GDC 1. 3. For DC and COL reviews, the findings will also summarize the staff’s evaluation of requirements and restrictions (e.g., interface requirements and site parameters) and COL action items