Document: NUREG-0800
Document ID: 9551c0fd-dc14-40e8-aba3-3a15cb85ea2c
Document Type: srp
Title: 15.5.2
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350142.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.5.1
CFR Part: 
CFR Title: 

Content:
INADVERTENT OPERATION OF ECCS AND CHEMICAL AND VOLUME CONTROL SYSTEM MALFUNCTION THAT INCREASES REACTOR COOLANT INVENTORY REVIEW RESPONSIBILITIES Primary - Reactor Systems Branch (RSB) Secondary - None I. AREAS OF REVIEW Various types of equipment malfunctions, operator errors, and abnormal occurrences that may occur with moderate frequency can cause an unplanned increase in reactor coolant inventory. Depending on the boron concentration and temperature of the injected water and the response of the automatic control systems, a power level increase may result and lead to fuel damage or over- pressurization of the reactor coolant system. Alternatively, a power level decrease and depressurization may result. The reactor will trip from high water level, high flux, or high or low pressure. This SRP section is intended to be applicable to these types of moderate frequency events that increase reactor coolant inventory. These transients should be discussed in individual sections of the'applicant's safety analysis report (SAR), as required by the Standard Format (Ref. 1). The specific initiating events considered in this SRP section are: 1. Boiling water reactors (BWRs)--Inadvertent operation of the high pressure core spray, high pressure coolant Injection, or reactor core isolation cooling system. 2. PWRs--Inadvertent operation of high pressure emergency core cooling system (high pressure injection system) or a malfunction of the chemical and volume control system. Other BWR transients that can result in an increase in reactor coolant inventory include feedwater system malfunctions (increasing flow), steam pressure regulator malfunctions (decreasing flow), loss of electrical load, turbine trip, main steam isolation valve (MSIV) closure, and loss of condenser vacuum. These transients are the subject of other SRP sections that consider Rev. 1 - July 1981 USNRC STANDARD REVIEW PLAN Standard reviiew plans are prepared for the guidance of the Office of Nuclear Reactor