The Oregon State University High Temperature Test Facility (HTTF) has started its first test data collection campaign.
The HTTF is an integral test facility scaled one fourth in length and diameter to the Modular High Temperature Gas Reactor. Its purpose is to obtain high-quality data on thermal fluid behavior in high temperature gas reactors.
The HTTF consists of a primary loop containing the reactor vessel with an electrically heated ceramic core, a steam generator, gas circulator and associated piping. The maximum core power output at the HTTF is 2.2MW. The primary loop is capable of operating at prototypical temperatures at a pressure of 8 bar.
A reactor cavity cooling system (RCCS) is also present at the HTTF. This consists of forced water-cooled panels that surround the reactor vessel. This RCCS is not a scaled version of an actual HTGR design, but rather is used to specify the boundary conditions to control radiation heat transfer from the vessel wall.
Shakedown testing at the HTTF has been ongoing since the spring of 2016. In the winter of 2107, the HTTF completed its first official matrix test—a crossover duct exchange flow test.
Since that time, two additional duct exchange flow tests have been completed. During the remainder of 2017, it is anticipated that the HTTF will complete additional tests, including depressurized conduction cooldown and pressurized conduction cooldown transients.
By: Brian Woods