Document: NUREG-0800
Document ID: 8da52d2b-9980-4076-8056-2cafebb25ed6
Document Type: srp
Title: THERMAL AND HYDRAULIC DESIGN
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550060.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.4
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CFR Title: 

Content:
of fission products during normal operation or AOOs. 2. GDC 12 requires that the reactor core and associated coolant, control, and protection systems be designed to assure that power oscillations that result in conditions exceeding specified acceptable fuel design limits are not possible or can be reliably and readily detected and suppressed. Power oscillations within the reactor core may result from conditions such as improper fuel design or loading; improper reactivity control, including control rod positioning; coolant flow instabilities; moderator void formation; and instabilities associated with nonhomogeneous reactor coolant density distributions. The occurrence of power oscillations can lead to excessive localized power peaking, cyclic thermal fatigue, and subsequent exceedence of fuel design limits eventually leading to fuel failure. Compliance with GDC 12 provides assurance that the thermal-hydraulic design of the reactor core and associated systems protect the reactor from the consequences of power oscillations that could challenge the integrity of the fuel and result in the release of fission products. 4.4-8 Revision 2 - March 2007 III. REVIEW PROCEDURES The OL and COL reviews also encompass the proposed technical specifications to assure that they are adequate with regard to safety limits, limiting safety system settings, and conditions of operation. The reviewer will select material from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria. For deviations from these specific acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. For DC and COL applications submitted uder Part 52, the level of information reviewed should be consistent with that of a FSAR submitted in an OL application. However,