ENTRY 14293 20170714 142914293 0 1 SUBENT 14293001 20170714 142914293 1 1 BIB 11 33 14293 1 2 TITLE Measurement of Ratio of Eta of Uranium-233 to 14293 1 3 Uranium-235 in the Reactivity Measurement Facility 14293 1 4 AUTHOR (D.R.Deboisblanc,E.Fast) 14293 1 5 REFERENCE (J,ANS,4,270,1961) 14293 1 6 REL-REF (I,,D.R.Deboisblanc+,C,58GENEVA,13,75,1958) Facility 14293 1 7 description. 14293 1 8 INSTITUTE (1USAPPO) Phillips Petroleum Company, Atomic Energy 14293 1 9 Division, Idaho Falls, Idaho. 14293 1 10 FACILITY (REAC,1USAINL) The Reactivity Measurements Facility 14293 1 11 (RMF) is a low power reactor located in the fuel 14293 1 12 element storage canal of the Material Testing Reactor 14293 1 13 at the National Reactor Testing Station in Idaho. 14293 1 14 INC-SPECT The correction to eta was introduced to obtained the 14293 1 15 Maxwellian-averaged eta ratio. This factor 14293 1 16 [(sigma/sigma m)U-233/((sigma/sigma m)U-235)]* 14293 1 17 [1-((sigma ef flux e)/(sigma f flux))U- 33]/ 14293 1 18 [1-((sigma ef flux e)/(sigma f flux))U-235] where 14293 1 19 subscripts m, e and f denote, respectively, 14293 1 20 Maxwellian, above Maxwellian and fission, and sigma 14293 1 21 the effective microscopic cross section for the 14293 1 22 indicated energy region. 14293 1 23 METHOD (REAC) The RMF measurements were made on 46-ml 14293 1 24 samples sealed in polyethylene capsules. Dilutions of 14293 1 25 the 1-N HNO3 solutions permitted extrapolation of the 14293 1 26 differential reactivity to infinite dilution to 14293 1 27 determine corrections for self-shielding. The three 14293 1 28 experimental positions of the RMF used represent a 14293 1 29 range of flux spectra of equivalent thin 1/v- 14293 1 30 cadmium ratios from 28 to 150. 14293 1 31 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. 14293 1 32 CORRECTION The measurements were corrected for all known sample 14293 1 33 impurity effects. 14293 1 34 HISTORY (20170714C) BP 14293 1 35 ENDBIB 33 0 14293 1 36 COMMON 1 3 14293 1 37 EN-DUMMY 14293 1 38 EV 14293 1 39 0.0253 14293 1 40 ENDCOMMON 3 0 14293 1 41 ENDSUBENT 40 0 14293 199999 SUBENT 14293002 20170714 142914293 2 1 BIB 4 6 14293 2 2 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 14293 2 3 (92-U-235(N,ABS),,ETA,,MXW)) 14293 2 4 SAMPLE The Harwell samples were received as a metal bead for 14293 2 5 U-235, and as UO2F2 for U-233. 14293 2 6 METHOD RMF Position: Center of water hole. 14293 2 7 STATUS (TABLE) Table I, page 270. 14293 2 8 ENDBIB 6 0 14293 2 9 NOCOMMON 0 0 14293 2 10 DATA 2 1 14293 2 11 DATA DATA-ERR 14293 2 12 NO-DIM NO-DIM 14293 2 13 1.134 0.01 14293 2 14 ENDDATA 3 0 14293 2 15 ENDSUBENT 14 0 14293 299999 SUBENT 14293003 20170714 142914293 3 1 BIB 4 6 14293 3 2 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 14293 3 3 (92-U-235(N,ABS),,ETA,,MXW)) 14293 3 4 SAMPLE The Harwell samples were received as a metal bead for 14293 3 5 U-235, and as UO2F2 for U-233. 14293 3 6 METHOD RMF Position: Corner of water hole. 14293 3 7 STATUS (TABLE) Table I, page 270. 14293 3 8 ENDBIB 6 0 14293 3 9 NOCOMMON 0 0 14293 3 10 DATA 2 1 14293 3 11 DATA DATA-ERR 14293 3 12 NO-DIM NO-DIM 14293 3 13 1.123 0.008 14293 3 14 ENDDATA 3 0 14293 3 15 ENDSUBENT 14 0 14293 399999 SUBENT 14293004 20170714 142914293 4 1 BIB 4 6 14293 4 2 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 14293 4 3 (92-U-235(N,ABS),,ETA,,MXW)) 14293 4 4 SAMPLE The Harwell samples were received as a metal bead for 14293 4 5 U-235, and as UO2F2 for U-233. 14293 4 6 METHOD RMF Position: Lattice. 14293 4 7 STATUS (TABLE) Table I, page 270. 14293 4 8 ENDBIB 6 0 14293 4 9 NOCOMMON 0 0 14293 4 10 DATA 2 1 14293 4 11 DATA DATA-ERR 14293 4 12 NO-DIM NO-DIM 14293 4 13 1.116 0.006 14293 4 14 ENDDATA 3 0 14293 4 15 ENDSUBENT 14 0 14293 499999 SUBENT 14293005 20170714 142914293 5 1 BIB 4 5 14293 5 2 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 14293 5 3 (92-U-235(N,ABS),,ETA,,MXW)) 14293 5 4 SAMPLE Both American samples were U3O8. 14293 5 5 METHOD RMF Position: Center of water hole. 14293 5 6 STATUS (TABLE) Table I, page 270. 14293 5 7 ENDBIB 5 0 14293 5 8 NOCOMMON 0 0 14293 5 9 DATA 2 1 14293 5 10 DATA DATA-ERR 14293 5 11 NO-DIM NO-DIM 14293 5 12 1.130 0.01 14293 5 13 ENDDATA 3 0 14293 5 14 ENDSUBENT 13 0 14293 599999 SUBENT 14293006 20170714 142914293 6 1 BIB 4 5 14293 6 2 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 14293 6 3 (92-U-235(N,ABS),,ETA,,MXW)) 14293 6 4 SAMPLE Both American samples were U3O8. 14293 6 5 METHOD RMF Position: Corner of water hole. 14293 6 6 STATUS (TABLE) Table I, page 270. 14293 6 7 ENDBIB 5 0 14293 6 8 NOCOMMON 0 0 14293 6 9 DATA 2 1 14293 6 10 DATA DATA-ERR 14293 6 11 NO-DIM NO-DIM 14293 6 12 1.117 0.009 14293 6 13 ENDDATA 3 0 14293 6 14 ENDSUBENT 13 0 14293 699999 SUBENT 14293007 20170714 142914293 7 1 BIB 4 5 14293 7 2 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 14293 7 3 (92-U-235(N,ABS),,ETA,,MXW)) 14293 7 4 SAMPLE Both American samples were U3O8. 14293 7 5 METHOD RMF Position: Lattice. 14293 7 6 STATUS (TABLE) Table I, page 270. 14293 7 7 ENDBIB 5 0 14293 7 8 NOCOMMON 0 0 14293 7 9 DATA 2 1 14293 7 10 DATA DATA-ERR 14293 7 11 NO-DIM NO-DIM 14293 7 12 1.129 0.007 14293 7 13 ENDDATA 3 0 14293 7 14 ENDSUBENT 13 0 14293 799999 ENDENTRY 7 0 1429399999999