ENTRY 31771 20180508 31843177100000001 SUBENT 31771001 20180508 31843177100100001 BIB 16 40 3177100100002 TITLE Measurement of 75As(n,2n) cross section in 3177100100003 well-defined spectrum of LR-0 special core 3177100100004 AUTHOR (M.Kostal, V.Rypar, M.Schulc, E.Losa, P.Baron, 3177100100005 M.Marecek, J.Uhlir) 3177100100006 INSTITUTE (3CZRUJV) 3177100100007 REFERENCE (J,ANE,100,(2),42,2017) 3177100100008 (W,KOSTAL,20180228) Latest values tabulated. 3177100100009 Document LR0-RESR-004 submitted to IRPhE in 2018 3177100100010 "VVER-1000 physics experiments hexagonal jattices 3177100100011 (1.275 cm Pitch) of Low Enriched U(3.3 wt.% U235)O2 3177100100012 fuel assemblies in light water 75As(n, 2n), 3177100100013 23Na(n,2n), 90Zr(n,2n), 89Y(n,2n) reaction rates" 3177100100014 received from M.Kostal on 28 February 2018. 3177100100015 REL-REF (N,,M.Kostal+,J,ARI,135,83,2018) 3177100100016 Measured LR-0 neutron spectrum in void case tabulated 3177100100017 FACILITY (REAC,3CZRUJV) LR-0 reactor 3177100100018 INC-SOURCE (REAC) 3177100100019 SAMPLE As2O3 substance (656.95 g, 2.927 g/cm3) melted in an 3177100100020 Al capsule (80 mm diam.). 3177100100021 METHOD (ACTIV) Irradiated for 20 hours, and between 3177100100022 irradiations was 12 hours. 3177100100023 (GSPEC) Measurement started 4 weeks after irradiation, 3177100100024 and continued for 24 hours 3177100100025 DETECTOR (HPGE) Efficiency calculated by MCNP6 3177100100026 DECAY-DATA (33-AS-74,17.77D,DG,634.8,0.154, 3177100100027 DG,595.8,0.59) 3177100100028 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 3177100100029 (28-NI-58(N,P)27-CO-58,,SIG) 3177100100030 DECAY-MON (79-AU-198-G,2.6947D,DG,411.8,0.9562) 3177100100031 (27-CO-58-G,70.86D,DG,810.8,0.9945) 3177100100032 CORRECTION Corrected for 3177100100033 - the spectral shift (ratio between the full geometry 3177100100034 and empty geomtery). 3177100100035 - flux loss caused by the relatively thick target and 3177100100036 capsule. 3177100100037 STATUS (APRVD) Proof-read by Michal Kostal (2018-05-09) 3177100100038 HISTORY (20161123C) VS. 3177100100039 (20180108U) On. INSTITUTE, FACILITY: 3CZRUJF -> 3CZRUJV3177100100040 (20180508A) On. 002 deleted. 003-004 supersded. 3177100100041 005-006 added. 3177100100042 ENDBIB 40 0 3177100100043 NOCOMMON 0 0 3177100100044 ENDSUBENT 43 0 3177100199999 NOSUBENT 31771002 20180508 31843177100200001 SUBENT 31771003 20180508 31843177100300001 BIB 6 18 3177100300002 REACTION (33-AS-75(N,2N)33-AS-74,,SIG,,SPA) 3177100300003 INC-SPECT LR-0 reactor spectrum. 3177100300004 The measured numerical spectrum in void case is in 3177100300005 Table 2 of M.Kostal+,Appl.Radiat.Isot.135(2018)83. 3177100300006 MISC-COL (MISC) Cross section averaged in LR-0 reactor spectrum 3177100300007 above 10 MeV 3177100300008 ERR-ANALYS (ERR-T) Total uncertainty (5.1%)3177100300009 (ERR-1) Statistics of 74As activity (0.4%)3177100300010 (ERR-2) Bias between 74As 596 and 635 keV peaks (1.2%)3177100300011 (ERR-3) Statistics of 198Au activity (0.6%)3177100300012 (ERR-4) Statistics of 58Co activity (1.3%)3177100300013 (ERR-5) Bias between Au/Ni based scaling factors (2.5%)3177100300014 (ERR-6) 74As distribution modeling (3.3%)3177100300015 (ERR-7) Spectral shift correction (1.5%)3177100300016 (ERR-8) Bias between calc. and meas.HPGe response(1.6%)3177100300017 STATUS (TABLE) Table 3 of Appl.Radiat.Isotopes 128(2017)92 3177100300018 (SPSDD,31771005) 3177100300019 HISTORY (20180508A) On. Superseded. 3177100300020 ENDBIB 18 0 3177100300021 COMMON 7 6 3177100300022 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 ERR-7 3177100300023 ERR-8 3177100300024 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3177100300025 PER-CENT 3177100300026 1.2 0.6 1.3 2.5 3.3 1.5 3177100300027 1.6 3177100300028 ENDCOMMON 6 0 3177100300029 DATA 5 1 3177100300030 EN-DUMMY DATA ERR-T ERR-1 MISC 3177100300031 MEV MICRO-B PER-CENT PER-CENT MB 3177100300032 1. 77. 5.1 0.4 227.6 3177100300033 ENDDATA 3 0 3177100300034 ENDSUBENT 33 0 3177100399999 SUBENT 31771004 20180508 31843177100400001 BIB 6 10 3177100400002 REACTION (33-AS-75(N,2N)33-AS-74,,SIG,,FIS) 3177100400003 INC-SPECT 235U(n,nth) prompt fission neutron spectrum 3177100400004 ANALYSIS Cross section averaged over the LR-0 spectrum above 3177100400005 10 MeV multiplied by the fracion of 235U prompt 3177100400006 fission neutrons above 10 MeV in ENDF/B-VII (0.1396%) 3177100400007 ERR-ANALYS (DATA-ERR) No information on the source of uncertainty 3177100400008 STATUS (TABLE) Text (p48) of Appl.Radiat.Isotopes 128(2017)92 3177100400009 (DEP,31771003) LR-0 spectrum averaged cross section 3177100400010 (SPSDD,31771006) 3177100400011 HISTORY (20180508A) On. Superseded. 3177100400012 ENDBIB 10 0 3177100400013 NOCOMMON 0 0 3177100400014 DATA 3 1 3177100400015 KT-DUMMY DATA DATA-ERR 3177100400016 MEV MB MB 3177100400017 1.32 0.318 0.016 3177100400018 ENDDATA 3 0 3177100400019 ENDSUBENT 18 0 3177100499999 SUBENT 31771005 20180508 31843177100500001 BIB 6 17 3177100500002 REACTION (33-AS-75(N,2N)33-AS-74,,SIG,,SPA) 3177100500003 INC-SPECT LR-0 reactor spectrum. 3177100500004 The measured numerical spectrum in void case is in 3177100500005 Table 2 of M.Kostal+,Appl.Radiat.Isot.135(2018)83. 3177100500006 MISC-COL (MISC) Cross section averaged in LR-0 reactor spectrum 3177100500007 above 10 MeV 3177100500008 ERR-ANALYS (ERR-T) Total uncertainty (4.3%)3177100500009 (ERR-1) Statistics of 74As activity (0.3%)3177100500010 (ERR-2) Bias between 74As 596 and 635 keV peaks (0.5%)3177100500011 (ERR-3) Target modeling (3.3%)3177100500012 (ERR-4) HPGe efficiency volume source - As (0.9%)3177100500013 (ERR-5) Statistics of 198Au activity (0.4%)3177100500014 (ERR-6) Statistics of 58Co activity (1.3%)3177100500015 (ERR-7) HPGe efficiency point source - Au,Ni (1.9%)3177100500016 (ERR-8) Bias between Au/Ni based scaling factors (1.4%)3177100500017 STATUS (TABLE) Table 3.7.5.5 of LR0-RESR-004 (2018) 3177100500018 HISTORY (20180508C) On 3177100500019 ENDBIB 17 0 3177100500020 COMMON 7 6 3177100500021 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 ERR-7 3177100500022 ERR-8 3177100500023 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3177100500024 PER-CENT 3177100500025 0.5 3.3 0.9 0.4 1.3 1.9 3177100500026 1.4 3177100500027 ENDCOMMON 6 0 3177100500028 DATA 5 1 3177100500029 EN-DUMMY DATA ERR-T ERR-1 MISC 3177100500030 MEV MICRO-B PER-CENT PER-CENT MB 3177100500031 1. 79.69 4.3 0.3 235.4 3177100500032 ENDDATA 3 0 3177100500033 ENDSUBENT 32 0 3177100599999 SUBENT 31771006 20180508 31843177100600001 BIB 6 9 3177100600002 REACTION (33-AS-75(N,2N)33-AS-74,,SIG,,FIS) 3177100600003 INC-SPECT 235U prompt fission neutron spectra 3177100600004 ANALYSIS Cross section averaged over the LR-0 spectrum above 3177100600005 10 MeV multiplied by the fracion of 235U prompt 3177100600006 fission neutrons above 10 MeV in ENDF/B-VII (0.1396%) 3177100600007 ERR-ANALYS (DATA-ERR) Total uncertainty (4.3%) 3177100600008 STATUS (TABLE) Table 3.7.5.5 of LR0-RESR-004 (2018) 3177100600009 (DEP,31771005) LR-0 spectrum averaged cross section 3177100600010 HISTORY (20180508C) On 3177100600011 ENDBIB 9 0 3177100600012 NOCOMMON 0 0 3177100600013 DATA 3 1 3177100600014 KT-DUMMY DATA DATA-ERR 3177100600015 MEV MB PER-CENT 3177100600016 1.32 0.3205 4.3 3177100600017 ENDDATA 3 0 3177100600018 ENDSUBENT 17 0 3177100699999 ENDENTRY 6 0 3177199999999