Document: NUREG-0800
Document ID: 1df526d9-2ae0-4da2-b936-2e24b038ca8c
Document Type: srp
Title: DIVERSE INSTRUMENTATION AND CONTROL SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070650035.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.8
CFR Part: 
CFR Title: 

Content:
systems: The ATWS mitigation system instrumentation includes [summarize the basic functions and elements of the I&C system design submitted for review]. Based on the review of these functions and the design bases submitted by the applicant, the staff concludes that the ATWS mitigation design includes an appropriate set of functions. Based on review of the interfaces of the ATWS mitigation system and equipment with the RTS, the staff concludes that the separation and independence design features of the RTS are not compromised by the ATWS mitigation system design. Where isolation devices are provided in the RTS to support ATWS mitigation interfaces, the isolation devices are applied and qualified to the guidelines of SRP BTP 7-11. 7.8-10 Revision 5 - March 2007 Based on the above items, the staff concludes that the design of the ATWS mitigation system is acceptable and satisfies the specific design requirements identified in 10 CFR 50.62 for [identify reactor type]. 4. Additional evaluation findings applicable to diverse I&C system manual controls and displays: Based on a review of diverse manual displays and controls, the staff concludes that these controls and displays are independent and diverse from the safety computer system, and sufficient for manual, system-level actuation of critical safety functions and monitoring of parameters that support the safety functions. Therefore, the staff concludes that the manual controls and displays fulfill the guidance of the Staff Requirements Memorandum on SECY 93-087, item II.Q. 5. Additional evaluation findings applicable to DAS: Based on review of DAS functions and design, the staff concludes that the DAS is acceptable. The functional requirements, independence requirements, and diversity requirements for this system are consistent with the applicant’s diversity and defense-in-depth analysis, and fulfill the applicable guidance of the SRM on SECY-93-087, Item II.Q. 6. For DC and COL reviews, the findings will also