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:
rements over the first core cycle is suitably conservative, and that adequate negative worth has been provided by the control system to assure shutdown capability. Reactivity control requirements will be reviewed for additional cycles as this information becomes available. The staff concludes that the nuclear design is acceptable and meets the requirements of GDC 10, 11, 12, 13, 20, 25, 26, 27, and 28. This conclusion is based on the following: 1. The applicant has met the requirements of GDC 11 with respect to prompt inherent nuclear feedback characteristics in the power operating range by: A. Calculating a negative power coefficient of reactivity. B. Using calculational methods that have been found acceptable. The applicant needs to present reactivity coefficients actually used in transient analyses and safety assessments and show that suitably conservative values are used. The staff has reviewed the Doppler reactivity coefficients in this case and found them to be suitably conservative. 2. The applicant has met the requirements of GDC 12 with respect to power oscillations that could result in conditions exceeding specified acceptable fuel design limits by: A. Showing that such power oscillations are not possible and/or can be easily detected and thereby remedied. B. Using calculational methods that have been found acceptable. The staff has reviewed the analysis of these power oscillations in this case and found them to be suitably conservative. 3. The applicant has met the requirements of GDC 13 with respect to provision of I&C to monitor variables and systems that can affect the fission process by: A. Providing instrumentation and systems to monitor the core power distribution, control rod positions and patterns, and other process variables such as temperature and pressure. B. Providing suitable alarms and/or control room indications for these monitored variables. 4. The applicant has met the requirements for GDC 26 with respect to provision of two independent