AN EXPERIMENTAL INVESTIGATION OF THE EFFECT OF CLAD BALLOONING ON THE EFFECTIVENESS OF PWR EMERGENCY COOLING
A series of thermal-hydraulic experiments has been performed on a model PWR fuel assembly, containing a severe partial blockage, in the THETIS Rig at AEE Winfrith. The assembly comprised 49 full length, electrically heated fuel rod simulators and the blockage was created by attaching thin-walled, preformed swellings to a group of 16 rods. The blockage occupied a complete grid interval and reduced the subchannel flow area by a maximum of 80% over a length of 200 mm. Four types of experiments were performed: - Single phase - Forced reflood - Gravity reflood - Level swell This report presents a detailed description of the THETIS Rig and the 80% blocked cluster test assembly and outlines the operating procedures for the four types of experiments. It also describes the rig and test section instrumentation and the data acquisition system. Presentations of the results of the experiments are made elsewhere.
Bibliographic Reference: EUR 10078 EN (1985) MF, 521 P., BFR 900, BLOW-UP COPY BFR 2605, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989124009700 / Last updated on: 1987-01-01
Available languages: en