Document: NUREG-0800
Document ID: 1877a6e5-f5a2-4394-bd63-c323831e96d0
Document Type: srp
Title: INTRODUCTION - TRANSIENT AND ACCIDENT ANALYSES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML2231/ML22319A149.pdf
Revision Date: 2023-07
Chapter: 15
Section ID: 15.0
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CFR Title: 

Content:
computer codes that have not been approved for use by the NRC for the intended application, then the reviewer should confirm that the application describes the models, methods, and codes and provides information to justify their use in accordance with SRP 15.0.2 and RG 1.203 (Ref. 15). ii. Input Parameters and Initial Conditions. The reviewer verifies that the applicant has: (1) identified the major input parameters and initial conditions used in the analyses; (2) included the initial values of other variables and parameters in the application if they are used in the analyses of the particular event under study; (3) ensured that the 15.0-11 Draft Revision 4 – July 2023 parameters and initial conditions used in the analyses are suitably conservative8; and (4) discussed the bases (including the degree of conservatism) used to select the numerical values of the input parameters. The reviewer verifies that the input parameters and initial conditions are consistent with applicable technical specifications. iii. Results. The reviewer ensures that the applicant has presented the results of the analyses, including key parameters as a function of time during the course of the transient or accident. The following are examples of parameters that should be included: • Neutron power • Thermal power • Heat fluxes, average and maximum • RCS pressure • DNBR or CPR, as applicable • Core and recirculation loop coolant flow rates for BWRs • Coolant conditions, including inlet temperature, core average temperature (for PWRs), core average steam volume fraction (for BWRs), average exit and hot channel exit temperatures, and steam volume fractions • Temperatures, including maximum fuel centerline temperature, maximum clad temperature, or maximum fuel enthalpy • Reactor coolant inventory, including total inventory, and coolant level in various locations in the RCS • Secondary (power conversion) system parameters, including steam flow rate, steam pressure and