Document: NUREG-0800
Document ID: 58e96831-02fa-4fe0-9367-ac30b1da435a
Document Type: srp
Title: CONTROL ROD MISOPERATION (SYSTEM MALFUNCTION OR OPERATOR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0636/ML063600415.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.4.3
CFR Part: 
CFR Title: 

Content:
s reasonable assurance that a single malfunction of the reactivity control system, together with anticipated operational occurrences caused by the initiating event of a control rod misoperation due to system malfunction or operator error during either normal operation or an AOO, will not cause specified acceptable fuel design limits to be exceeded. III. REVIEW PROCEDURES 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 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. The reviewer, in determining whether the criteria are met, should determine the AOOs to be considered for this event. Generally, the list of errors should include: (1) inadvertently withdrawing one or several rods, (2) leaving one or several rods behind during bank withdrawal, and (3) inserting one or several rods with power compensation in other portions of the core. In addition to these events, the reviewer must also decide, by postulating single failures in equipment or errors in operation, whether additional single rod malfunctions can be created. Once the list of AOOs has been established, the reviewer must determine acceptability in accordance with the criteria of subsection II of this SRP section. 1. For each failure event analyzed, the cases which result in a limiting fuel rod condition should be presented. Initial conditions and parameter values selected for these cases should be justified with a sensitivity analysis or discussion. Conditions of first-order importance for any time in cycle are initial power level and distribution, initial rod 15.4.3-6 Revision 3 - March 2007 configuration, reactivity addition rate, moderator temperature, fuel temperature, and void