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:
ant 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 forth in the preliminary safety analysis report meet the acceptance criteria given in Subsection II of this SRP section. For the review of combined license (COL) applications, the procedures are also utilized to verify that the initial design criteria and bases have been appropriately implemented in the final design as set forth in the final safety analysis report. Upon request from the primary reviewer, the coordinating review branches will provide input for the areas of review stated in Subsection I of this SRP section. The primary reviewer obtains and uses such input as required to assure that this review procedure is complete. For the purpose of this SRP section, a typical system is assumed for use as a guide. It is assumed for older BWRs that the SLCS consists of a boron solution tank, a test water tank, two positive displacement pumps, two explosive valves, and associated local valves and controls. The applicant may submit designs that deviate from this typical system. For example for the ABWR, the two explosive valves are replaced with two motor-operated injection valves and two motor-operated pump suction valves. For the newer ESBWR, the system consists of two identical 50-percent capacity loops, each having an accumulator, two parallel (squib-actuated) explosive valves, and associated local valves and controls. Also, for the purpose of this SRP section, it is assumed for the typical SLCS in older BWRs that the sodium pentaborate solution is injected into the RPV at the bottom of the vessel below the core support plate. In some newer BWR designs, the solution is injected into the high-pressure core spray discharge piping and into the RPV via the spray sparger. For example in ABWR designs, the solution is injected into the high-pressure core flooder injection