Document: NUREG-0800
Document ID: ddaa3c7d-ce79-4a3f-aaae-4e4436ab7bc1
Document Type: srp
Title: NUCLEAR DESIGN
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070740003.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.3
CFR Part: 
CFR Title: 

Content:
challenge the integrity of the fuel and cause the possible release of fission products to the environment. 4. GDC 13 requires that I&C be provided to monitor variables and systems that can affect the fission process over normal operating ranges, anticipated operational occurrences, and accident conditions, and to maintain the variables and systems within the prescribed operating ranges. The nuclear design review includes verification that instrumentation and systems, along with the data processing systems and alarms, will reasonably assure maintenance of core power distributions within specified design limits. Compliance with GDC 13 provides assurance that I&C systems can adequately monitor changes in core reactivity and maintain variables that affect core reactivity within designed operating ranges, thus minimizing the possibility of an adverse transient affecting the integrity of the fuel cladding. 5. GDC 20 requires automatic initiation of the RCSs to assure that acceptable fuel design limits are not exceeded as a result of anticipated operational occurrences and to assure automatic operation of systems and components important to safety under accident conditions. Review of the nuclear design verifies the adequacy of control systems and setpoints necessary to shut down the reactor at any time during operation. The automatic initiation of control systems during a reactor transient prevents damage to the nuclear fuel and, in the early stages of a reactor accident, will minimize the extent of damage to the fuel, thus reducing the release of fission products to the reactor coolant system and possibly the environment. 6. GDC 25 requires that no single malfunction of the RCS can cause violation acceptable fuel design limits. The nuclear design review includes verification that no single malfunction of the RCS can causes the fuel design limits to be exceeded. Meeting the requirements of GDC 25 significantly reduces the possibility that a malfunction in the RCS would