Refine your search�ソスF     
Report No.

Core dynamics analysis on reactivity insertion and loss of coolant flow tests for HTGRs

Takamatsu, Kuniyoshi  ; Nakagawa, Shigeaki  ; Takeda, Tetsuaki

Safety demonstration tests using the HTTR are in progress to verify its inherent safety features and improve the safety technology and design methodology for High-Temperature Gas-cooled Reactors (HTGRs). The reactivity insertion test is one of the safety demonstration tests for the HTTR. This test simulates the rapid increase in the reactor power by withdrawing the control rod without operating the reactor power control system. In addition, the loss of coolant flow tests has been conducted to simulate the rapid decrease in the reactor power by tripping one, two or all out of three gas circulators. This paper describes the validation results for the newly developed code using the experimental results of the safety demonstration tests. Especially, the reactivity was clarified using an original mathematical expression which shows the relationship among region temperature coefficient, region temperature rise and power distribution.



- Accesses





[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.