국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Testing of an Integrated Reactor Core Simulator and Power Conversion System with Simulated Reactivity Feedback
저자	Bragg-Sitton, Shannon M.;; Hervol, David S.;; Godfroy, Thomas J.
Keyword	BRAYTON CYCLE;; FEEDBACK CONTROL;; GAS COOLED REACTORS;; NUCLEAR REACTORS;; REACTOR CORES;; SYSTEMS INTEGRATION;; TEST FACILITIES;; THERMODYNAMICS
URL	http://hdl.handle.net/2060/20100021163
보고서번호	NASA/CR-2010-215842
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A Direct Drive Gas-Cooled (DDG) reactor core simulator has been coupled to a Brayton Power Conversion Unit (BPCU) for integrated system testing at NASA Glenn Research Center (GRC) in Cleveland, Ohio. This is a closed-cycle system that incorporates an electrically heated reactor core module, turboalternator, recuperator, and gas cooler. Nuclear fuel elements in the gas-cooled reactor design are replaced with electric resistance heaters to simulate the heat from nuclear fuel in the corresponding fast spectrum nuclear reactor. The thermodynamic transient behavior of the integrated system was the focus of this test series. In order to better mimic the integrated response of the nuclear-fueled system, a simulated reactivity feedback control loop was implemented. Core power was controlled by a point kinetics model in which the reactivity feedback was based on core temperature measurements;; the neutron generation time and the temperature feedback coefficient are provided as model inputs. These dynamic system response tests demonstrate the overall capability of a non-nuclear test facility in assessing system integration issues and characterizing integrated system response times and response characteristics.