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