국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Online Oxide Contamination Measurement and Purification Demonstration
저자	Bradley, D. E.;; Godfroy, T. J.;; Webster, K. L.;; Garber, A. E.;; Polzin, K. A.;; Childers, D. J.
Keyword	CENTRIFUGAL PUMPS;; COLD TRAPS;; CONTAMINATION;; COOLING SYSTEMS;; FABRICATION;; FEASIBILITY ANALYSIS;; FISSION PRODUCTS;; FLOW MEASUREMENT;; LESSONS LEARNED;; MECHANICAL ENGINEERING;; OXIDES;; OXYGEN ANALYZERS;; POTASSIUM;; PURIFICATION;; SODIUM;; THERMOCOUPLES
URL	http://hdl.handle.net/2060/20110022666
보고서번호	NASA/TP-2011-216473
발행년도	2011
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Liquid metal sodium-potassium (NaK) has advantageous thermodynamic properties indicating its use as a fission reactor coolant for a surface (lunar, martian) power system. A major area of concern for fission reactor cooling systems is system corrosion due to oxygen contaminants at the high operating temperatures experienced. A small-scale, approximately 4-L capacity, simulated fission reactor cooling system employing NaK as a coolant was fabricated and tested with the goal of demonstrating a noninvasive oxygen detection and purification system. In order to generate prototypical conditions in the simulated cooling system, several system components were designed, fabricated, and tested. These major components were a fully-sealed, magnetically-coupled mechanical NaK pump, a graphite element heated reservoir, a plugging indicator system, and a cold trap. All system components were successfully demonstrated at a maximum system flow rate of approximately 150 cc/s at temperatures up to 550 C. Coolant purification was accomplished using a cold trap before and after plugging operations which showed a relative reduction in oxygen content.