Document: NUREG-0800
Document ID: 504a24fe-9056-495a-8541-0e278016ce80
Document Type: srp
Title: in that offsite AC power remains available to operate the station
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0703/ML070300702.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.2.6
CFR Part: 
CFR Title: 

Content:
lues of the relevant monitored parameters and instruments indications. 3. GDC 15 requires design of the reactor coolant system and its auxiliary, control, and protection systems with sufficient margin so RCPB design conditions are not exceeded during any conditions of normal operation, including AOOs. GDC 15 applies to this section because the reviewer evaluates the consequences of AOOs that could decrease heat removal by the secondary system and lead to an increase in the reactor coolant temperature and pressure. GDC 15 requirements provide assurance that RCPB design conditions are not exceeded for initiating events that decrease heat removal by the secondary system. 4. GDC 17 requires onsite and offsite electrical power systems for safety-related SSCs to perform intended functions. Each power system (assuming the other system is not functioning) must provide sufficient capacity and capability so SAFDLs and RCPB design conditions are not exceeded in AOOs. GDC 17 applies to this SRP section because it governs review of the analysis of abnormal operating occurrences to which it must be applied. GDC 17 requirements provide assurance that SAFDLs and RCPB design conditions are not exceeded in initiating events that decrease heat removal by the secondary system, concurrent with a loss of offsite power (LOOP). 5. GDC 26 requires two independent reactivity control systems with different design principles to control reactivity changes so acceptable fuel design limits are not exceeded. GDC 26 applies to this section because the reviewer evaluates the consequences of AOOs that could decrease heat removal by the secondary system and lead to reactivity changes within the core causing the fuel cladding thermal design criteria to be exceeded. GDC 26 requires reactivity control systems to control reactivity changes reliably with appropriate margin for malfunctions (i.e., stuck control rods) so that under conditions of normal operation, including AOOs, SAFDLs are not exceeded.