Document: NUREG-0800
Document ID: 5e40cf60-028d-44c3-b9b8-735a6a68a48a
Document Type: srp
Title: Revision 6 - August 2016
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16020A036.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
s in part that control and protection systems be designed with appropriate margin to assure that specified acceptable fuel damage limits are not exceeded. This includes timing and performance margins. GDC 12, “Suppression of Reactor Power Oscillations,” requires in part that reactor power oscillations are either (1) not possible or (2) detected and suppressed. This requirement places strict real-time constraints on any protection system components that detect and suppress power oscillations. GDC 13, “Instrumentation and Control,” requires in part that instrumentation be provided to monitor variables and systems over their anticipated ranges for normal operations, for anticipated operational occurrences, and for accident conditions as appropriate to assure adequate safety. Digital instrumentation must respond quickly enough so that the behavior of variables can be ascertained by operators. GDC 19, “Control Room,” requires in part that applicants establish a control room from which actions can be taken to operate the nuclear power unit safely under normal conditions, and to maintain the nuclear power unit in a safe condition during an accident. In addition, a remote shutdown capability is required to permit the reactor to be safely shut down. GDC 20, “Protection System Functions,” requires in part that the reactor protection system provide automatic initiation so that: (1) fuel design limits are not exceeded and (2) accidents are BTP 7-21-3 Revision 6 – August 2016 sensed and mitigated. Both require timely operation of protection system components, thus establishing the timing requirements for detecting parameters exceeding their setpoints and equipment actuation in the protection system. GDC 21, “Protection System Reliability and Testability,” requires in part high functional reliability of safety systems. Timely operation is necessary for high functional reliability of safety systems. GDC 23, “Protection System Failure Modes,” requires in