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