Document: NUREG-0800
Document ID: 00a272ef-67f0-4667-9a5b-6f9c9490ef5b
Document Type: srp
Title: CONTROL SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16020A095.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.7
CFR Part: 
CFR Title: 

Content:
ds that the control systems are appropriately designed and are of sufficient quality to minimize the potential for 7.7-8 Revision 6 - August 2016 challenges to safety systems. Based upon the review of the system design, the staff finds that there is reasonable assurance that the systems fully conform to the applicable guidelines. Therefore, the staff finds that the requirements of GDC 1 and 10 CFR 50.54(jj) and 50.55(i) have been met. The staff conducted a review of the plant transient response to normal load changes and anticipated operational occurrences such as reactor trip, turbine trip, upsets in the feedwater, and steam bypass systems. The staff concludes that the control systems are capable of maintaining system variables within prescribed operating ranges. The applicant has also provided an environmental control system to protect safety instruments and instrument sensing lines from freezing in accordance with the guidelines of RG 1.151, Regulatory Position 5. Therefore, the staff finds that the control systems satisfy this aspect of the requirements of GDC 13. The staff review of control systems considered the features of these systems for both manual and automatic control of the process systems. The staff finds that the features for manual and automatic control facilitate the capability to maintain plant variables within prescribed operating limits. The staff finds that the control systems permit actions to be taken to operate the plant safely during normal operation, including anticipated operational occurrences, and, therefore, the control systems satisfy the requirements of GDC 19 with regard to normal plant operations. The staff review determines that the control systems are appropriately isolated from safety systems and would preserve the reliability, redundancy, and independence requirements of the protection system. Therefore, the staff concludes that the isolation of these systems from safety systems satisfies the applicable requirements of 10 CFR