Document: NUREG-0800
Document ID: 0698b3f7-427d-4477-8d06-7b4cb5c20c5b
Document Type: srp
Title: INFORMATION SYSTEMS IMPORTANT TO SAFETY
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16020A088.pdf
Revision Date: 2024-06
Chapter: 7
Section ID: 7.5
CFR Part: 
CFR Title: 

Content:
satisfies the applicable requirements of GDC 2 and 4. 7.5-13 Revision 6 - August 2016 The nonsafety portions of information systems important to safety are appropriately isolated from safety systems, including the safety portions of the information systems. Therefore, the staff concludes that the isolation of these systems from safety systems satisfies the applicable requirements of 10 CFR 50.55a(h) and the requirements of GDC 24. The instrumentation provided for monitoring severe accident conditions has been designed to operate in the severe accident environment for which it is intended and over the time span for which it is needed. Therefore, the staff finds that the severe accident monitoring instrumentation satisfies the applicable requirements of GDC 2 and 4. The accident monitoring instrumentation conforms to the guidelines for the instrumentation to access plant conditions during and following an accident provided in RG 1.97. The redundant information systems conform to the guidelines for the physical independence of electrical systems provided in RG 1.75, “Criteria for Independence of Electrical Safety Systems.” The instrument spans and EOP action points were established in accordance with the guidelines of RG 1.105. The environmental monitoring system provided to protect the safety instrument sensing lines from freezing conforms to the guidelines of RG 1.151, “Instrument Sensing Lines,” Regulatory Position 5. The accident monitoring instrumentation includes appropriate variables. The range and accuracy of the instrument channels for these variables are consistent with the plant safety analysis. The accident monitoring instrumentation includes appropriate variables for monitoring severe accident conditions. The variables monitored and the range and accuracy of instrumentation provided to monitor these variables is consistent with the severe accident analysis. Therefore, the staff finds that the accident monitoring instrumentation meets the