Document: NUREG-0800
Document ID: b296e705-242e-4773-bbbb-37e1b24e45fe
Document Type: srp
Title: STANDBY LIQUID CONTROL SYSTEM (BWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350556.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.5
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Auxiliary Systems Branch (ASB) Secondary- None I. AREAS OF REVIEW Boiling water reactor (BWR) plants include a standby liquid control system (SLCS) that provides backup capability for reactivity control independent of the control rod system. The SLCS functions by injecting a boron solution into the reactor to effect shutdown. This system has the capability for controlling the reactivity difference between the steady-state operating condition at any time in core life and the cold shutdown condition. The review covers the SLCS design to the point where the system connects to the reactor coolant system (RCS). The ASB reviews the system to determine its adequacy to perform the shutdown function to assure conform- ance with the requirements of General Design Criteria 2, 26, and 27. Other points reviewed by ASB are as follows: 1. The functional performance characteristics of SLCS components and the effects of adverse environmental occurrences, abnormal operational conditions, or accident conditions such as those due to a loss-of-coolant accident (LOCA). 2. The system to determine that a malfunction or a single failure of a component will not reduce the safety-related functional performance capabilities of the system. 3. The system design with respect to the capability to detect, collect, and control system leakage and the capability to isolate portions of the system in case of excessive leakage or component malfunctions. 4. The capability of the system to prevent precipitation of the neutron absorber in components and lines containing the absorber solutions. 5. The provisions for operational testing and the instrumentation and control features that verify that the system is available to operate in the correct mode. Rev. 2 - July 1981 USNRC STANDARD REVIEW PLAN Standard review plans are prepared for the-guidance of the Office of Nuclear Reactor Regulation staff responsible for the review of applications to construct and operate nuclear