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
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CFR Title: 

Content:
ordance 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 applicable requirements of General Design Criteria 13 and 19. 7.5-12 Draft Revision 6 – August 2015 The accident monitoring instrumentation includes the following functions required by 10 CFR 50.34(f): feedwater system flow indication, accident monitoring instrumentation, inadequate core cooling instrumentation, instruments for monitoring plant conditions following core damage, central reactor vessel water level recording. Additionally, the power supply for the accident monitoring instrumentation pressurizer level indication complies with the requirements of 10 CFR 50.34(f)(2)(xx). Therefore, the staff concludes that the instrumentation systems important to safety satisfy the applicable requirements of 10 CFR 50.34(f), Subparts 10 CFR 50.34(f)xii, 10 CFR 50.34(f)xvii, 10 CFR 50.34(f)xviii, 10 CFR 50.34(f)xix, 10 CFR 50.34(f)xx, and 10 CFR 50.34(f)xxiv. 7.5-13 Draft Revision 6 – August 2015 The staff reviewed the systems for which a bypassed or inoperable status is indicated in the control room. The staff finds that the bypass indications will give the operators timely information and status reports so the operators can mitigate the effects of unexpected system unavailability. The bypass