Document: NUREG-0800
Document ID: ff5838f8-986a-4d8b-a039-fb26df280426
Document Type: srp
Title: – 15.5.2
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070725.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.5.1
CFR Part: 
CFR Title: 

Content:
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 their effects on system parameters other than coolant inventory. However, the impact of these transients on reactor coolant inventory is considered by the reviewer as a portion of the effort involved in this SRP section. The review of events leading to an increase in reactor coolant inventory considers the sequence of events, the analytical model, the values of parameters used in the analytical model, and the predicted consequences of the transient. The sequence of events described in the applicant's SAR is reviewed by RSBSRXB. The 8 RSBSRXB reviewer concentrates on the need for the reactor protection system, the engineered safety systems, and operator action to secure and maintain the reactor in a safe condition. The analytical methods are reviewed by RSBSRXB to ascertain whether the mathematical 9 modeling and computer codes have been previously reviewed and accepted by the staff. If a referenced analytical method has not been previously reviewed, the RSBSRXB reviewer 10 initiates a generic evaluation of the new analytical model. In addition, the values of all the parameters used in the new analytical model, including the initial conditions of the core and system, are reviewed. The predicted results of those transients analyzed are reviewed to assureensure that the 11 consequences meet the acceptance criteria given in subsection II, below. Further, the results of the analysis are reviewed to ascertain that the values of pertinent system parameters are within ranges expected for the type and class of reactor under review. Review Interfaces12 The RSBSRXB will coordinate other branch evaluations that interface with the overall review 13 of the transient analysis as follows: 14 The Instrumentation and Controls Systems Branch (ICSB)(HICB) reviews