ENTRY 14088 20210630 14881408800000001
SUBENT 14088001 20210630 14881408800100001
BIB 11 80 1408800100002
TITLE Thermal neutron irradiation of Uranium-235, bromine, 1408800100003
iodine in presence of organic liquid 1408800100004
AUTHOR (M.P.Tsoukatos) 1408800100005
REFERENCE (T,TSOUKATOS,1967) Primary reference. 1408800100006
(J,DA/B,28,2759,1968) Abstract only. 1408800100007
REL-REF (O,23561002,H.O.Denschlag,J,JIN,31,1873,1969) I data. 1408800100008
INSTITUTE (1USAMHG) 1408800100009
FACILITY (REAC,1USAMHG) Nuclear Reactor at Phoenix Lab. 1408800100010
INC-SOURCE (REAC) The neutron flux was 2*10**12 neutron/cm2/sec. 1408800100011
SAMPLE (92-U-235,ENR=0.90) Uranyl Nitrate + organic Liquid. 1408800100012
Uranyl nitrate was irradiated either "suspended" in 1408800100013
n-C5H12 or dissolved in pure tertiary butyl alcohol 1408800100014
(henceforth TBA) or in a mixture of TBA+CH30H (3:1). 1408800100015
The amount of uranyl nitrate irradiated was 1408800100016
determined by weight. Irradiations were run using 1408800100017
both natural uranyl nitrate (0.715% U-235) and 1408800100018
enriched (90% U-235). For the former 10-30 mg uranyl 1408800100019
nitrate were irradiated for 3-5 min., and for the 1408800100020
latter 1-3 mg for 5-10 sec. The samples were 1408800100021
irradiated in a small (1.4 ml) polyethylene snap-cap 1408800100022
vial. 1408800100023
DETECTOR (NAICR,GELI) Gamma-ray spectra were obtained by using 1408800100024
either a 3"x3" NaI detector, or a Ge-Li detector. 1408800100025
METHOD (CHSEP) Research has been done to determine the 1408800100026
independent fission yields of short-lived fission 1408800100027
nuclides or of fission nuclides with short-lived 1408800100028
precursors. By irradiating uranium in the presence of 1408800100029
an organic liquid the recoil fission nuclides should 1408800100030
react with the organic molecules to form stable 1408800100031
organic products. Because a fission product recoil 1408800100032
energy is typically about 70-100 MeV, it would be 1408800100033
expected to react with the organic liquid to the same 1408800100034
extent and result in the same organic products as 1408800100035
nuclides of the same element activated by the 1408800100036
(n,gamma) process. The recoil atoms formed by beta 1408800100037
decay, on the other hand, should be less reactive in 1408800100038
forming organic products due to the significantly 1408800100039
smaller recoil energy which typically would be about 1408800100040
1-2 eV. What is of importance is that the chemical 1408800100041
reaction would take place during the neutron 1408800100042
irradiation. Thus, the typical post-irradiation 1408800100043
chemical separation, and the time it would take to 1408800100044
perform such an operation, would be avoided 1408800100045
completely. However, following the irradiation, the 1408800100046
organically bound fission products must still be 1408800100047
separated from the precursor nuclides. But the 1408800100048
separation method to be used can instead be based on 1408800100049
physical rather than chemical properties of the 1408800100050
chemically bound nuclides. Specifically, gas 1408800100051
chromatography separations should be feasible. This 1408800100052
type of separation method has a number of 1408800100053
particularly important advantages. Consider the case 1408800100054
where it is of interest to examine specific fission 1408800100055
bromine nuclides. In this case the hot atom reactions 1408800100056
which would occur in organic liquids would probably 1408800100057
be experimentally favorable in that a larger 1408800100058
percentage of the bromine nuclides would form. 1408800100059
organic compounds than would selenium nuclides. 1408800100060
Further, any bromine formed from selenium beta-decay 1408800100061
would react to form organically-bound bromides. To 1408800100062
inhibit these latter reactions it is desirable to 1408800100063
separate the organic bromides from the selenium as 1408800100064
quickly as possible. Described in this thesis is a 1408800100065
semi-automatic injection method devised to permit 1408800100066
separation of the inorganic and organic fractions 1408800100067
within a few seconds after the end of the neutron 1408800100068
irradiation. The organic fraction is then carried by 1408800100069
helium flow gas to the gas chromatography column 1408800100070
where separation of the organic compounds begins to 1408800100071
occur. This latter separation procedure permits the 1408800100072
isolation of individual chemical compounds containing 1408800100073
in each compound all fission nuclides of the element 1408800100074
characterizing the compound. 1408800100075
HISTORY (20051230C) DR 1408800100076
(20110531A) OS. Author's initials, title and status 1408800100077
modified. 1408800100078
(20210630A) BP: Updated REFERENCE, corrected FACILITY 1408800100079
location, SAMPLE, DETECTOR and INC-SOURCE, 1408800100080
added METHOD and REL-REF, included actual 1408800100081
thesis data. 1408800100082
ENDBIB 80 0 1408800100083
COMMON 1 3 1408800100084
EN 1408800100085
EV 1408800100086
0.0253 1408800100087
ENDCOMMON 3 0 1408800100088
ENDSUBENT 87 0 1408800199999
SUBENT 14088002 20210630 14881408800200001
BIB 4 9 1408800200002
REACTION (92-U-235(N,F)ELEM/MASS,IND,FY,,FRC) 1408800200003
DECAY-DATA ((1.)34-SE-81-M,61.0MIN,B-) 1408800200004
((2.)34-SE-83-M,69.0SEC,B-) 1408800200005
((3.)34-SE-84,3.3MIN,B-) 1408800200006
((4.)34-SE-85,39.0SEC,B-) 1408800200007
((5.)34-SE-86,16.0SEC,B-) 1408800200008
STATUS (TABLE) Table 16, page 56 of the thesis. 1408800200009
HISTORY (20210630A) BP: Replaced the University of Illinois 1408800200010
data with the thesis data. 1408800200011
ENDBIB 9 0 1408800200012
NOCOMMON 0 0 1408800200013
DATA 5 5 1408800200014
ELEMENT MASS ISOMER DATA DECAY-FLAG 1408800200015
NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 1408800200016
34.0 81.0 1.0 0.0088 1. 1408800200017
34.0 83.0 1.0 0.1473 2. 1408800200018
34.0 84.0 0.3437 3. 1408800200019
34.0 85.0 0.5502 4. 1408800200020
34.0 86.0 0.6045 5. 1408800200021
ENDDATA 7 0 1408800200022
ENDSUBENT 21 0 1408800299999
SUBENT 14088003 20210630 14881408800300001
BIB 8 15 1408800300002
REACTION (92-U-235(N,F)ELEM/MASS,IND,FY,,FRC) 1408800300003
MONIT-REF ((MONIT)13097001,A.C.Wahl+,J,PR,126,1112,1962) 134I 1408800300004
data. 1408800300005
METHOD CH3I-H2O phase, Exp. 347. 1408800300006
ERR-ANALYS (DATA-ERR) Experimental errors. The uncertainty in 1408800300007
these calculated values arise from the uncertainties 1408800300008
in the activity data as well as the uncertainty in 1408800300009
the 134I fractional chain yield used as monitor. 1408800300010
MONITOR (92-U-235(N,F)53-I-134,IND,FY,,FRC/MXW) 1408800300011
DECAY-DATA ((1.)53-I-131,8.05D,B-) 1408800300012
((2.)53-I-133-G,20.8HR,B-) 1408800300013
((3.)53-I-135,6.75HR,B-) 1408800300014
STATUS (TABLE) Table 26, page 94. 1408800300015
HISTORY (20210630A) BP: Replaced the University of Illinois 1408800300016
data with the thesis data. 1408800300017
ENDBIB 15 0 1408800300018
COMMON 2 3 1408800300019
MONIT MONIT-ERR 1408800300020
NO-DIM NO-DIM 1408800300021
0.12 0.02 1408800300022
ENDCOMMON 3 0 1408800300023
DATA 5 3 1408800300024
ELEMENT MASS DATA DATA-ERR DECAY-FLAG 1408800300025
NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 1408800300026
53.0 131.0 0.0048 0.0022 1. 1408800300027
53.0 133.0 0.052 0.014 2. 1408800300028
53.0 135.0 0.65 0.25 3. 1408800300029
ENDDATA 5 0 1408800300030
ENDSUBENT 29 0 1408800399999
SUBENT 14088004 20210630 14881408800400001
BIB 8 14 1408800400002
REACTION (92-U-235(N,F)ELEM/MASS,IND,FY,,FRC) 1408800400003
MONIT-REF ((MONIT)13097001,A.C.Wahl+,J,PR,126,1112,1962) 134I 1408800400004
data. 1408800400005
METHOD CH3I-CHCl3 phase, Exp. 347. 1408800400006
ERR-ANALYS (DATA-ERR) Experimental errors. The uncertainty in 1408800400007
these calculated values arise from the uncertainties 1408800400008
in the activity data as well as the uncertainty in 1408800400009
the 134I fractional chain yield used as monitor. 1408800400010
MONITOR (92-U-235(N,F)53-I-134,IND,FY,,FRC/MXW) 1408800400011
DECAY-DATA ((1.)53-I-131,8.05D,B-) 1408800400012
((2.)53-I-133-G,20.8HR,B-) 1408800400013
((3.)53-I-135,6.75HR,B-) 1408800400014
STATUS (TABLE) Table 26, page 94. 1408800400015
HISTORY (20210630A) BP 1408800400016
ENDBIB 14 0 1408800400017
COMMON 2 3 1408800400018
MONIT MONIT-ERR 1408800400019
NO-DIM NO-DIM 1408800400020
0.12 0.02 1408800400021
ENDCOMMON 3 0 1408800400022
DATA 5 3 1408800400023
ELEMENT MASS DATA DATA-ERR DECAY-FLAG 1408800400024
NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 1408800400025
53.0 131.0 0.0050 0.0023 1. 1408800400026
53.0 133.0 0.052 0.015 2. 1408800400027
53.0 135.0 0.84 0.23 3. 1408800400028
ENDDATA 5 0 1408800400029
ENDSUBENT 28 0 1408800499999
SUBENT 14088005 20210630 14881408800500001
BIB 8 14 1408800500002
REACTION (92-U-235(N,F)ELEM/MASS,IND,FY,,FRC) 1408800500003
MONIT-REF ((MONIT)13097001,A.C.Wahl+,J,PR,126,1112,1962) 134I 1408800500004
data. 1408800500005
METHOD CH3I-H2O phase, Exp. 349. 1408800500006
ERR-ANALYS (DATA-ERR) Experimental errors. The uncertainty in 1408800500007
these calculated values arise from the uncertainties 1408800500008
in the activity data as well as the uncertainty in 1408800500009
the 134I fractional chain yield used as monitor. 1408800500010
MONITOR (92-U-235(N,F)53-I-134,IND,FY,,FRC/MXW) 1408800500011
DECAY-DATA ((1.)53-I-131,8.05D,B-) 1408800500012
((2.)53-I-133-G,20.8HR,B-) 1408800500013
((3.)53-I-135,6.75HR,B-) 1408800500014
STATUS (TABLE) Table 26, page 94. 1408800500015
HISTORY (20210630A) BP 1408800500016
ENDBIB 14 0 1408800500017
COMMON 2 3 1408800500018
MONIT MONIT-ERR 1408800500019
NO-DIM NO-DIM 1408800500020
0.12 0.02 1408800500021
ENDCOMMON 3 0 1408800500022
DATA 5 3 1408800500023
ELEMENT MASS DATA DATA-ERR DECAY-FLAG 1408800500024
NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 1408800500025
53.0 131.0 0.0050 0.0018 1. 1408800500026
53.0 133.0 0.051 0.015 2. 1408800500027
53.0 135.0 0.78 0.18 3. 1408800500028
ENDDATA 5 0 1408800500029
ENDSUBENT 28 0 1408800599999
SUBENT 14088006 20210630 14881408800600001
BIB 8 14 1408800600002
REACTION (92-U-235(N,F)ELEM/MASS,IND,FY,,FRC) 1408800600003
MONIT-REF ((MONIT)13097001,A.C.Wahl+,J,PR,126,1112,1962) 134I 1408800600004
data. 1408800600005
METHOD CH3I-CHCl3 phase, Exp. 349. 1408800600006
ERR-ANALYS (DATA-ERR) Experimental errors. The uncertainty in 1408800600007
these calculated values arise from the uncertainties 1408800600008
in the activity data as well as the uncertainty in 1408800600009
the 134I fractional chain yield used as monitor. 1408800600010
MONITOR (92-U-235(N,F)53-I-134,IND,FY,,FRC/MXW) 1408800600011
DECAY-DATA ((1.)53-I-131,8.05D,B-) 1408800600012
((2.)53-I-133-G,20.8HR,B-) 1408800600013
((3.)53-I-135,6.75HR,B-) 1408800600014
STATUS (TABLE) Table 26, page 94. 1408800600015
HISTORY (20210630A) BP 1408800600016
ENDBIB 14 0 1408800600017
COMMON 2 3 1408800600018
MONIT MONIT-ERR 1408800600019
NO-DIM NO-DIM 1408800600020
0.12 0.02 1408800600021
ENDCOMMON 3 0 1408800600022
DATA 5 3 1408800600023
ELEMENT MASS DATA DATA-ERR DECAY-FLAG 1408800600024
NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 1408800600025
53.0 131.0 0.0050 0.0018 1. 1408800600026
53.0 133.0 0.047 0.015 2. 1408800600027
53.0 135.0 0.82 0.17 3. 1408800600028
ENDDATA 5 0 1408800600029
ENDSUBENT 28 0 1408800699999
ENDENTRY 6 0 1408899999999