Experimental Investigation of Condensation Phenomena inside a U-tube Steam Generator

摘要

Reflux condensation tests examining steam condensation in a PWR steam generator (SG) were conducted at the Oregon State University (OSU) Advanced Plant Experiment (APEX) Test Facility from 2005-2007. The experimental data collected will provide a basis to assess TRACE steam generator modeling techniques and assist in development of improved models for condensation and steam generator thermal-hydraulics. Reflux condensation and steam generator thermal-hydraulics are difficult processes to model using codes such as TRACE due to the relative scarcity of experimental data. Changes currently being proposed to 10 CFR 50.46 may increase the importance of small break loss of coolant accident (SB-LOCA) analysis in plant licensing. Steam generator thermal-hydraulics plays an important role in small break LOCAs, and thus improvements need to be made in the ability to simulate steam generators during hypothetical accidents.