Document: NUREG-0800
Document ID: 14526726-7681-4bb2-ad84-2c05688139ed
Document Type: srp
Title: 5
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:
Rev. 1 - July 1981 The results of the applicant's analysis are reviewed and compared to the accept- ance criteria presented in subsection II regarding maximum pressure in the reactor coolant and main steam systems and the minimum critical heat flux ratio (MCHFR) or departure from nucleate boiling ratio (DNBR). 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 rites (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, contain- ment pressure, pressure relief valve flow rate, and flow rate from the reactor coolant system to the containment system (if applicable) are reviewed. The values of the more important of these parameters for the events leading to an increase in.reactor coolant inventory are compared.to those predicted for other similar plants to confirm that they are within the expected range. IV. EVALUATION FINDINGS The reviewer verifies that the SAR contains sufficient information and his review supports the following kinds of statements and conclusions, which should be included in the staff's safety evaluation report (SER): A number of plant transients can result in an increase in reactor coolant inventory. Those that might be expected to occur with moderate frequency are inadvertent operation of the emergency core cooling system, chemical and volume control system malfunction, and various BWR transients.* All these postulated transients have been reviewed. It was found that the most limiting in regard to was the __ transient. The staff concludes that the analysis of a transient resulting in an unplanned increase in heat removal by the secondary system due to an increase in reactor coolant inventory is acceptable and meets the requirements of