PWR steam generators

This paper introduces the purpose, technical background and framework of preliminary secondary water chemistry guidelines for Japanese PWRs. Addition, the differences in bases of parameter settings between the Japanese and overseas guidelines are discussed.

17p vironald 15-12-2022 6 4   Download

In this paper, recent advances in the CUPID code are presented in three sections. First, the domain decomposition parallel method implemented in the CUPID code is described with the parallel efficiency test for multiple processors. Then, the coupling of CUPID-MARS via heat structure is introduced, where CUPID has been coupled with a system-scale thermal-hydraulics code, MARS, through the heat structure. The coupled code has been applied to a multi-scale thermal-hydraulic analysis of a pool mixing test. Finally, CUPID-SG is developed for analyzing two-phase flows in PWR steam generators.

12p minhxaminhyeu5 30-06-2019 16 1   Download

In the SG (steam generator) of PWR (pressurized water reactor) for a nuclear plant, hundreds of Ushaped tubes are used for the heat exchanger system. They interact with primary pressurized cooling water flow, generating flow-induced vibration in the secondary flow region. A simplified U-tube model is proposed in this study to apply for experiment and its counterpart computation. Using the commercial code, ANSYS-CFX, we first verified the Moody chart, comparing the straight pipe theory with the results derived from CFD (computational fluid dynamics) analysis.

9p minhxaminhyeu3 12-06-2019 15 1   Download

Multi-dimensional phenomena specific to the SGTR accident appeared such as significant thermal stratification in a cold leg in broken loop especially during the operation of highpressure injection (HPI) system. The RELAP5/MOD3.3 code overpredicted the broken SG secondaryside pressure after the start of the intact SG secondary-side depressurization, and failed to calculate the cold leg fluid temperature in broken loop.

8p minhxaminhyeu3 25-06-2019 11 0   Download

State the mechanism for steam generation in a PWR. Using simplified diagrams, identify and explain the purpose of the major components and equipment involved with a PWR. Identify the equipment used to control reactor power.

24p giotletinh_hd2009 14-10-2013 84 8   Download