Thia repo rt was prep ared as an acco unt of Gove rnme nt spon sore d work . Neith er the Unite d State s, nor the Com miss ion, nor any perso n actin g on beha lf of the Com miss ion: A. Make s any warra nty or repre senta tion, expre ssed or impli ed, with respe ct to the accuracy . com plete ness , or usef ulne ss of the infor mati od cont aine d in this repo rt. or that the use of any Infor matio n, appa ratus . meth od, or proc ess discl osed in thie repo rt may not infrin ge prlva tely owne d right s; or B. Assu mes any liabil ittes with resp ect to the use of, or for dam ages resu lting from the use of any inform ation . appa ratus , metb od, or proc ess discl osed in this repo rt.As used in the above .•'pers on actin g on beha lf of the Com miss ion" inclu des any employee or contr actor of the Com miss ion, or emp loy e of such cont racto r, to the exten t that such empl oyee or contr actor of the Com miss ion, or empl oyee of guch contr actor prepa res, disse mina tes, or prov ides acce ss to, any infor matio n purs uant to his emp loym ent or contr act wlth the Com miss ion, or hi B empl oyme nt with such contr actor .

No abstract

A series of tests was conducted in EBR-II which examined the dynamics of the transition from forced to natural circulation flow in a liquid-metal-cooled fast breeder reactor. Each test was initiated by abruptly tripping an electromagnetic pump which supplies 5–6 percent of the normal full operational primary flow rate. The ensuing flow coastdown reached a minimum value after which the flow increased as natural circulation was established. The effects of secondary system flow through the intermediate heat exchanger and reactor decay power level on the minimum in-core flow rates and maximum in-core temperatures were examined.

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No abstract