ENTRY 14293 20170714 14291429300000001 SUBENT 14293001 20170714 14291429300100001 BIB 11 33 1429300100002 TITLE Measurement of Ratio of Eta of Uranium-233 to 1429300100003 Uranium-235 in the Reactivity Measurement Facility 1429300100004 AUTHOR (D.R.Deboisblanc,E.Fast) 1429300100005 REFERENCE (J,ANS,4,270,1961) 1429300100006 REL-REF (I,,D.R.Deboisblanc+,C,58GENEVA,13,75,1958) Facility 1429300100007 description. 1429300100008 INSTITUTE (1USAPPO) Phillips Petroleum Company, Atomic Energy 1429300100009 Division, Idaho Falls, Idaho. 1429300100010 FACILITY (REAC,1USAINL) The Reactivity Measurements Facility 1429300100011 (RMF) is a low power reactor located in the fuel 1429300100012 element storage canal of the Material Testing Reactor 1429300100013 at the National Reactor Testing Station in Idaho. 1429300100014 INC-SPECT The correction to eta was introduced to obtained the 1429300100015 Maxwellian-averaged eta ratio. This factor 1429300100016 [(sigma/sigma m)U-233/((sigma/sigma m)U-235)]* 1429300100017 [1-((sigma ef flux e)/(sigma f flux))U- 33]/ 1429300100018 [1-((sigma ef flux e)/(sigma f flux))U-235] where 1429300100019 subscripts m, e and f denote, respectively, 1429300100020 Maxwellian, above Maxwellian and fission, and sigma 1429300100021 the effective microscopic cross section for the 1429300100022 indicated energy region. 1429300100023 METHOD (REAC) The RMF measurements were made on 46-ml 1429300100024 samples sealed in polyethylene capsules. Dilutions of 1429300100025 the 1-N HNO3 solutions permitted extrapolation of the 1429300100026 differential reactivity to infinite dilution to 1429300100027 determine corrections for self-shielding. The three 1429300100028 experimental positions of the RMF used represent a 1429300100029 range of flux spectra of equivalent thin 1/v- 1429300100030 cadmium ratios from 28 to 150. 1429300100031 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. 1429300100032 CORRECTION The measurements were corrected for all known sample 1429300100033 impurity effects. 1429300100034 HISTORY (20170714C) BP 1429300100035 ENDBIB 33 0 1429300100036 COMMON 1 3 1429300100037 EN-DUMMY 1429300100038 EV 1429300100039 0.0253 1429300100040 ENDCOMMON 3 0 1429300100041 ENDSUBENT 40 0 1429300199999 SUBENT 14293002 20170714 14291429300200001 BIB 4 6 1429300200002 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 1429300200003 (92-U-235(N,ABS),,ETA,,MXW)) 1429300200004 SAMPLE The Harwell samples were received as a metal bead for 1429300200005 U-235, and as UO2F2 for U-233. 1429300200006 METHOD RMF Position: Center of water hole. 1429300200007 STATUS (TABLE) Table I, page 270. 1429300200008 ENDBIB 6 0 1429300200009 NOCOMMON 0 0 1429300200010 DATA 2 1 1429300200011 DATA DATA-ERR 1429300200012 NO-DIM NO-DIM 1429300200013 1.134 0.01 1429300200014 ENDDATA 3 0 1429300200015 ENDSUBENT 14 0 1429300299999 SUBENT 14293003 20170714 14291429300300001 BIB 4 6 1429300300002 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 1429300300003 (92-U-235(N,ABS),,ETA,,MXW)) 1429300300004 SAMPLE The Harwell samples were received as a metal bead for 1429300300005 U-235, and as UO2F2 for U-233. 1429300300006 METHOD RMF Position: Corner of water hole. 1429300300007 STATUS (TABLE) Table I, page 270. 1429300300008 ENDBIB 6 0 1429300300009 NOCOMMON 0 0 1429300300010 DATA 2 1 1429300300011 DATA DATA-ERR 1429300300012 NO-DIM NO-DIM 1429300300013 1.123 0.008 1429300300014 ENDDATA 3 0 1429300300015 ENDSUBENT 14 0 1429300399999 SUBENT 14293004 20170714 14291429300400001 BIB 4 6 1429300400002 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 1429300400003 (92-U-235(N,ABS),,ETA,,MXW)) 1429300400004 SAMPLE The Harwell samples were received as a metal bead for 1429300400005 U-235, and as UO2F2 for U-233. 1429300400006 METHOD RMF Position: Lattice. 1429300400007 STATUS (TABLE) Table I, page 270. 1429300400008 ENDBIB 6 0 1429300400009 NOCOMMON 0 0 1429300400010 DATA 2 1 1429300400011 DATA DATA-ERR 1429300400012 NO-DIM NO-DIM 1429300400013 1.116 0.006 1429300400014 ENDDATA 3 0 1429300400015 ENDSUBENT 14 0 1429300499999 SUBENT 14293005 20170714 14291429300500001 BIB 4 5 1429300500002 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 1429300500003 (92-U-235(N,ABS),,ETA,,MXW)) 1429300500004 SAMPLE Both American samples were U3O8. 1429300500005 METHOD RMF Position: Center of water hole. 1429300500006 STATUS (TABLE) Table I, page 270. 1429300500007 ENDBIB 5 0 1429300500008 NOCOMMON 0 0 1429300500009 DATA 2 1 1429300500010 DATA DATA-ERR 1429300500011 NO-DIM NO-DIM 1429300500012 1.130 0.01 1429300500013 ENDDATA 3 0 1429300500014 ENDSUBENT 13 0 1429300599999 SUBENT 14293006 20170714 14291429300600001 BIB 4 5 1429300600002 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 1429300600003 (92-U-235(N,ABS),,ETA,,MXW)) 1429300600004 SAMPLE Both American samples were U3O8. 1429300600005 METHOD RMF Position: Corner of water hole. 1429300600006 STATUS (TABLE) Table I, page 270. 1429300600007 ENDBIB 5 0 1429300600008 NOCOMMON 0 0 1429300600009 DATA 2 1 1429300600010 DATA DATA-ERR 1429300600011 NO-DIM NO-DIM 1429300600012 1.117 0.009 1429300600013 ENDDATA 3 0 1429300600014 ENDSUBENT 13 0 1429300699999 SUBENT 14293007 20170714 14291429300700001 BIB 4 5 1429300700002 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 1429300700003 (92-U-235(N,ABS),,ETA,,MXW)) 1429300700004 SAMPLE Both American samples were U3O8. 1429300700005 METHOD RMF Position: Lattice. 1429300700006 STATUS (TABLE) Table I, page 270. 1429300700007 ENDBIB 5 0 1429300700008 NOCOMMON 0 0 1429300700009 DATA 2 1 1429300700010 DATA DATA-ERR 1429300700011 NO-DIM NO-DIM 1429300700012 1.129 0.007 1429300700013 ENDDATA 3 0 1429300700014 ENDSUBENT 13 0 1429300799999 ENDENTRY 7 0 1429399999999