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:
EEE Std 603-1991, Clause 5.6. Alarms provided for manually controlled actions for which no automatic control is 7.5-14 Revision 6 - August 2016 provided and that are required for the safety systems to accomplish their safety functions comply with the guidance of IEEE Std 603-1991. Therefore, the staff concludes that the annunciator systems satisfy the guidance of the SRM on SECY-93-087, Item II.T, GDC 13 and 19. 7.5-15 Revision 6 - August 2016 Based on the above items, the staff finds that the information systems satisfy the requirements of GDC 13 for monitoring variables and systems over their anticipated ranges for normal operation, for anticipated operational occurrences, and for accident conditions. Further, the staff finds that conformance to GDC 13 and the applicable guidelines satisfies the applicable requirements of GDC 19 with respect to information systems provided in the control room from which actions can be taken to operate the unit safety under normal conditions and to maintain it in a safe condition under accident conditions. The safety parameter display system, the information systems associated with the emergency response facilities, and the emergency response data system, nonsafety portions of accident monitoring instrumentation, nonsafety portions of BISI, and nonsafety portions of the annunciator systems are appropriately isolated from safety systems. Electrical isolation devices were qualified in accordance with the guidance of SRP BTP 7-11. Therefore, the staff concludes that the isolation of these systems from safety systems satisfies the applicable requirements of 10 CFR 50.55a(h) and GDC 24. The applicant or licensee has also incorporated in the system design the recommendations of Three Mile Island (TMI) task action plan items [identify item number and how implemented] that the staff has reviewed and found acceptable. In the review of the information systems important to safety, the staff examined the dependence of these systems on the