Abstract
The 10 MW High Temperature Gas-Cooled Reactor-Test Module (HTR-10) is the first High Temperature Gas-Cooled Reactor in China. With the objective of raising the reactor power from 30% to 100% rated power, the power ascension test was planned and performed in January 2003. The test results verified the practicability and validity of the HTR-10 power regulation methods. In this study, the power ascension process is preliminarily simulated using the THERMIX code. The code satisfactorily reproduces the reactor transient parameters, including the reactor power, the primary helium pressure, and the primary helium outlet temperature. Reactor internals temperatures are also calculated and compared with the test values recorded by a number of thermocouples. THERMIX correctly simulates the temperature variation tendency for different measuring points, with good to fair agreement between the calculated temperatures and the measured ones. Based on the comparison results, the THERMIX simulation capability for the HTR-10 dynamic characteristics during the power ascension process can be demonstrated. With respect to the reactor safety features, it is of utmost importance that the maximum fuel center temperature during the test process is always much lower than the fuel temperature limit of 1620°C.
Highlights
The 10 MW High Temperature Gas-Cooled Reactor-Test Module (HTR-10), located at the Institute of Nuclear and New Energy Technology (INET) of Tsinghua University, is the first High Temperature Gas-Cooled Reactor (HTGR) in China
The HTR-10 itself is a complicated system characterized by multi-inputs, multi-outputs, and strong coupling, making the power ascension a somewhat complex process which needs the close coordination of different power regulation methods and encounters the large-range change of operation parameters in both the primary and the secondary circuits
The following inputs obtained from the test are adopted by the computation: (1) the primary helium mass flow rate; (2) the primary helium
Summary
After the successful completion of this power ascension test, the HTR-10 achieved the 72 h full power operation with satisfactory technical specifications meeting the design requirements very well [1]. The HTR-10 itself is a complicated system characterized by multi-inputs, multi-outputs, and strong coupling, making the power ascension a somewhat complex process which needs the close coordination of different power regulation methods and encounters the large-range change of operation parameters in both the primary and the secondary circuits. In light of the HTR-10 operation procedure, the strategy of proportionally increasing the secondary feed water mass flow rate, the primary helium mass flow rate, and the reactor power was adopted to complete the power ascension test. The practicability and validity of the HTR-10 power regulation means were fully demonstrated. Transient test data of the reactor core and other components were obtained for the validation of codes and models employed in the design process
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
