Document: NUREG-0800
Document ID: 9697248b-d015-42be-8808-2202db24977a
Document Type: srp
Title: STANDBY LIQUID CONTROL SYSTEM (BWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070680186.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.5
CFR Part: 
CFR Title: 

Content:
. The important parameters to consider in establishing equivalence are the vessel boron concentration required to achieve shutdown and the time required to achieve that vessel boron concentration. The minimally acceptable system should show an equivalency in these parameters to the 638-cm (251-in.) diameter vessels studied in NEDE-24222. Invoking specific requirements concerning equivalent reactivity control capacity for the minimum flow capacity and boron content in the SLCS ensures that sufficient boron can be injected at a rate sufficient to bring the reactor from rated power to cold shutdown. By providing automatic initiation (where required), further assurance is provided with respect to the timeliness of injection and thus of the initiation of reactivity control. 9.3.5-7 Revision 3 - March 2007 The NRC previously reviewed and accepted General Electric Company Licensing Topical Report, NEDE-31096P-A, (Ref. 11), which details conceptual designs to satisfy the 10 CFR 50.62 requirements for BWRs. This topical report further provides methods for determining equivalency specifics set forth by GL 85-03 (Ref. 9). This ensures that the SLCS can operate in conjunction with other features to mitigate an ATWS and will increase safety by reducing the potential for exceeding fuel, reactor coolant pressure boundary, and containment integrity limits. 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 specific acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives to the SRP criteria provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. The procedures below are used during the design certification review to determine that the design criteria and bases and the preliminary design as set