Document: NUREG-0800
Document ID: dd687b37-3f26-4512-91d8-633ddb655821
Document Type: srp
Title: DATA COMMUNICATION SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16020A097.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.9
CFR Part: 
CFR Title: 

Content:
d on the review of the system design for conformance to the guidelines, the staff finds that there is reasonable assurance that the systems fully conform to the guidelines applicable to these systems. Therefore, the staff finds that the requirements of GDC 1 and 10 CFR 50.54(jj) and 10 CFR 50.55(i) have been met. Additional evaluation findings applicable to all DCSs that support safety functions: The NRC staff concludes that the design of the DCS meets the relevant requirements of 10 CFR 50.55a(h). The review included the identification of those systems and components for the DCS that are designed to survive the effects of earthquakes, other natural phenomena, abnormal environments, and missiles. Based on the review, the staff concludes that the applicant or licensee has identified those systems and components consistent with the design bases for those systems. Sections 3.10 and 3.11 of the SER address the qualification programs to demonstrate the capability of these systems and components to survive these events. Therefore, the staff finds that the identification of these systems and components satisfies the requirements of General Design Criteria 2 and 4. Additional evaluation findings applicable to all DCSs that support protection system functions (RTS, SRP Section 7.2, “Reactor Trip System,” or ESFAS, SRP Section 7.3, “Engineered Safety Features Systems,”): Based on the review of system functions, the staff concludes that the DCS conforms to the design basis requirements of (IEEE Std 603-1991 or IEEE Std 279-1971) and 10 CFR 50.34(f). Setpoint analyses account for measurement inaccuracies attributable to the DCS in accordance with the guidance of RG 1.105. The staff concludes that the DCS adequately supports RTS and ESFAS functions as necessary to sense accident conditions and anticipated operational occurrences in order to initiate protective actions consistent with the accident analysis presented in Chapter 15 of the SAR and evaluated in the SER.