Document: NUREG-0800
Document ID: 16650158-402d-4897-850a-bc9e2cce7648
Document Type: srp
Title: INADVERTENT OPENING OF A PWR PRESSURIZER PRESSURE RELIEF
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070726.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.6.1
CFR Part: 
CFR Title: 

Content:
m margins is evaluated. The results of the analysis are reviewed and compared to the acceptance criteria presented in subsection II regarding the maximum pressure in the reactor coolant and main steam systems. The variations with time during the transient of the neutron power, heat fluxes (average and maximum), reactor coolant system pressure, minimum DNBR (PWR) or CPR (BWR), core and recirculation loop coolant flow rates (BWR), coolant conditions (inlet temperature, core average temperature (PWR), core average steam volume fraction (BWR), average exit and hot channel exit temperatures, and steam fractions), steamline pressure, containment pressure, pressure relief valve flow rate, and flow rate from the reactor coolant system to the containment system (if applicable) are reviewed. Time-related variations of the following are reviewed: - reactor power; - heat fluxes (average and maximum); - reactor coolant system pressure; - minimum DNBR (PWR) or CPR (BWR); - core and recirculation loop coolant flow rates (BWR); - coolant conditions (inlet temperature, core average temperature (PWR), core average steam volume fraction (BWR), average exit and hot channel exit temperatures, and steam fractions); - steamline pressure; - containment pressure; - pressure relief valve flow rate; and - flow rate from the reactor coolant system to the containment system (if applicable). 63 Values of the more important of these parameters for the transient caused by the inadvertent pressure relief valve opening are compared to with those predicted for other similar plants to 64 confirm that they are within the expected range. The SER draft should present one statement for all similar transients. * Minimum critical power ratio (MCPR) for a BWR. ** 15.6.1-9 DRAFT Rev. 2 - April 1996 Upon request from the RSBSRXB reviewer, other branches will provide input for the areas of 65 review stated in subsection I of this SRP section. The RSBSRXB reviewer obtains and uses 66 the input requested as