Document: NUREG-0800
Document ID: 4d7d277e-c006-45d6-94df-c84845dd68d0
Document Type: srp
Title: INADVERTENT OPENING OF A PWR PRESSURIZER PRESSURE RELIEF VALVE OR A BWR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350144.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.6.1
CFR Part: 
CFR Title: 

Content:
accounted for in the analyses. c. II.K.3.5. The reviewer evaluates the assumption made regarding reactor coolant pump trip to assure that they are consistent and conservatively modeled with respect to the final pump trip criteria which results from resolution of Task'Action Plan item II.K.3.5. d. II.K.3.16. For Boiling Water Reactor designs, the reviewer confirms that the results of the applicant's feasibility study, and, if required, system modifications to reduce the number of challenges to and the number of failure of relief valves, have been properly included in the evaluation of the event. e. II.K.3.25 and II.K.3.40. If, as a result of the transient, or as a result of loss of A/C power, containment isolation is indicated to occur, the reactor coolant pump component cooling water may be lost. The reviewer evaluates the applicant's submittal to determine that the reactor coolant pump seal integrity is not lost. If it cannot be established that seal integrity is assured, the reviewer assures that the evaluation of this event correctly accounts for seal failure. If the SAR states'that the inadvertent pressure relief valve opening transient is not as limiting as some other similar transient, the reviewer evaluates the justificaton presented by the applicant. If a quantitative analysis of the transient is presented in the SAR, the RSB reviewer, with the aid of the ICSB reviewer, reviews the timing of the initiation of those protection, engineered safety, and other systems needed to limit the consequence of the transient to acceptable levels. The RSB reviewer compares the predicted variation of system parameters with various trip and system initiation setpoints. To the extent deemed necessary, the RSB reviewer evaluates the effects of single active failures of systems and components which may alter the course of the transient. In this phase of the review the system reviews are performed as described in the SRP sections for Chapters 5, 6, 7 and 8 of the SAR. The