Document: NUREG-0800
Document ID: a2d035da-992b-42e8-894f-787a019b437d
Document Type: srp
Title: NUCLEAR DESIGN
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070410.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.3
CFR Part: 
CFR Title: 

Content:
including the magnitude of the uncertainty and the justification of the magnitude by examination of the accuracy of the methods used in calculations (SAR Section 4.3.3), and comparison where possible with reactor experiments. c. The applicant's combination of nominal values and uncertainties to provide suitably conservative values for use in reactor steady-state analysis (primarily 4.3-3 DRAFT Rev. 3 - April 1996 control requirements, SAR Section 4.3.2.4), stability analyses (SAR Section 4.3.2.8), and the transient and accident analyses presented in SAR Chapter 15. 4. The areas concerning reactivity control requirements and control provisions. These are: a. The control requirements and provisions for control necessary to compensate for long-term reactivity changes of the core. These reactivity changes occur because of depletion of the fissile material in the fuel, depletion of burnable poison in some of the fuel rods, and buildup of fission products and transuranium isotopes. b. The control requirements and provisions for control needed to compensate for the reactivity change caused by changing the temperature of the reactor from the hot, zero power condition to the cold shutdown condition. c. The control requirements and provisions for control needed to compensate for the reactivity effects caused by changing the reactor power level from full power to zero power. d. The control requirements and provisions for control needed to compensate for the effects on the power distribution of the high cross-section Xe-135 isotope. e. The adequacy of the control systems to assure that the reactor can be returned to and maintained in the cold shutdown condition at any time during operation. f. The applicant's analysis and experimental basis for determining the reactivity worth of a "stuck" control rod of highest worth. g. The provision of two independent control systems. 5. The areas of control rod patterns and reactivity worths. These are: a. Descriptions and figures