ENTRY 23190 20130301 22352319000000001 SUBENT 23190001 20130301 22352319000100001 BIB 10 51 2319000100002 TITLE Thermal neutron capture cross section of gadolinium 2319000100003 by pile-oscillation measurements in MINERVE. 2319000100004 AUTHOR (P.Leconte, J.Di-Salvo, M.Antony, A.Pepini,A.Hentati) 2319000100005 REFERENCE (C,2012KNOX,,(186),2012) 2319000100006 PHYSOR 2012 - Advances in Reactor Physics - Linking 2319000100007 Research, Industry, and Education, Knoxville,Tennessee,2319000100008 USA, April 15-20, 2012, on CD-ROM. Paper #186. 2319000100009 INSTITUTE (2FR CAD) 2319000100010 FACILITY (REAC,2FR CAD) MINERVE pool type reactor, max.power 2319000100011 100 Watts. 2319000100012 INC-SOURCE (REAC) 2319000100013 INC-SPECT PWR-UO2 spectrum. 2319000100014 METHOD (ACTIV) Combination of oscillation and activation 2319000100015 techniques. 2319000100016 SAMPLE 9 samples of natural gadolinium: 2319000100017 - 3 samples are made of sintered UO2 pellets (two with 2319000100018 a 235U enrichment of 3.0% and one of 5.1%), with the 2319000100019 addition of 1%, 2% and 3% of Gd2O3 (proportions given 2319000100020 in weight/percent), 2319000100021 - 3 samples are made of compacted Al2O3 powder in the 2319000100022 form of pellets, with the addition of 1%, 4% and 8% of 2319000100023 Gd2O3 (proportions given in weight/cent), 2319000100024 - 3 samples are made of H2O+5%NO3 solutions, with the 2319000100025 addition of 500, 1000 and 1400 ppm of Gd (1 ppm = 10-6)2319000100026 Sample Content Diam. Height Absorber mass2319000100027 mm mm amount 2319000100028 U-Gd1 UO2(3.0%)+1%Gd2O3 8.05 100.0 1.00+-0.02 % 2319000100029 U-Gd2 UO2(3.0%)+2%Gd2O3 8.05 100.0 2.00+-0.03 % 2319000100030 U-Gd3 UO2(5.1%)+3%Gd2O3 8.19 110.0 3.00+-0.04 % 2319000100031 Al-Gd1 Al2O3+1%Gd2O3 8.20 120.0 1.02+-0.02 % 2319000100032 Al-Gd2 Al2O3+4%Gd2O3 8.20 120.0 4.20+-0.05 % 2319000100033 Al-Gd3 Al2O3+8%Gd2O3 8.20 120.0 7.80+-0.25 % 2319000100034 H2O-Gd1 H2O-5%NO3+500ppm Gd 8.00 80.0 500+-3 ppm 2319000100035 H2O-Gd2 H2O-5%NO3+1000ppm Gd 8.00 80.0 1000+-5 ppm 2319000100036 H2O-Gd3 H2O-5%NO3+1400ppm Gd 8.00 80.0 1400+-7 ppm 2319000100037 Samples (B-10 or Li-6) used for calibration: 2319000100038 - 1 sample made of Pyrex (borosilicate glass), for the 2319000100039 calibration of samples U-Gd and Al-Gd, 2319000100040 - 6 samples made of H2O solutions with the addition of 2319000100041 300, 600 and 900 ppm of 10B, 700, 1400 and 2100 ppm of 2319000100042 6Li, for the calibration of the samples H2O-Gd. 2319000100043 Sample Content Diam. Height Absorber 2319000100044 mass amount 2319000100045 P Pyrex(12.45% natB) 8.00 100.0 12.45+-0.12 %2319000100046 H2O-B1 H2O + 300 ppm 10B 8.00 80.0 299+-1 ppm 2319000100047 H2O-B2 H2O + 600 ppm 10B 8.00 80.0 602+-2 ppm 2319000100048 H2O-B3 H2O + 900 ppm 10B 8.00 80.0 892+-3 ppm 2319000100049 H2O-Li1 H2O-2%NO3+700ppm 6Li 8.00 80.0 700+-3 ppm 2319000100050 H2O-Li2 H2O-2%NO3+1400ppm 6Li 8.00 80.0 1400+-5 ppm 2319000100051 H2O-Li3 H2O-2%NO3+2100ppm 6Li 8.00 80.0 2100+-7 ppm 2319000100052 HISTORY (20130301C) M.M. 2319000100053 ENDBIB 51 0 2319000100054 NOCOMMON 0 0 2319000100055 ENDSUBENT 54 0 2319000199999 SUBENT 23190002 20130301 22352319000200001 BIB 8 55 2319000200002 REACTION (64-GD-0(N,G),,SIG) 2319000200003 ANALYSIS The measurements have been analyzed in the framework of2319000200004 the exact perturbation theory with the PIMS dedicated 2319000200005 tool based on the APOLLO2 deterministic code, 281 group2319000200006 energy mesh and the Method of Characteristics for flux 2319000200007 solving photopeak. 2319000200008 CORRECTION Correction to subtract the reactivity worth from other 2319000200009 materials . 2319000200010 For 3D effects, self-shielding. 2319000200011 ERR-ANALYS (DATA-ERR) Not specified. 2319000200012 Correlation between each series due to systematic 2319000200013 uncertainties coming from the calibration by 10B or 6Li2319000200014 were taken into account. 2319000200015 Uncertainty due to the absorption cross section of 10B 2319000200016 or 6Li about 0.3%. 2319000200017 Major uncertainty sources on the reactivity worth 2319000200018 include: 2319000200019 - the repeatability and reproducibility of reactivity 2319000200020 measurement, 2319000200021 - the mass amount of gadolinium (or 10B/6Li for the 2319000200022 calibration samples), 2319000200023 - the diameter of the sample clad which impacts the 2319000200024 mass of water inside the oscillation rod. 2319000200025 Sample Measurement Absorber mass Clad diameter 2319000200026 U-Gd 0.3% 0.2-0.4% - 2319000200027 Al-Gd 0.3-0.4% 0.1-0.5% - 2319000200028 H2O-Gd 0.7-1.7% 0.4-0.5% 0.4-0.5% 2319000200029 P 0.2% 0.6% - 2319000200030 H2O-B 0.5-1.5% 0.3% 0.3% 2319000200031 H2O-Li 0.6-1.6% 0.3-0.4% 0.3-0.4% 2319000200032 STATUS (TABLE) Text of Abstract and page 14 of 2319000200033 C,2012KNOX,,(186),2012 2319000200034 REL-REF (D,14110001,G.Leinweber+,J,NSE,154,261,2006) 2319000200035 Strongly inconsistent with the microscopic measurements2319000200036 at Rensselaer Polytechnic Institute (44200 +- 500) b. 2319000200037 Resulted c-s agrees with JEFF-3.1.1 value 48630 b 2319000200038 within 1.6 % uncertainty ( 1 sigma). 2319000200039 COMMENT Of compiler.In article of G.Leinweber+,NSE,154,261,20062319000200040 the value of Gd-0 capture c-s is given in Table IV as 2319000200041 44300 b. 2319000200042 ADD-RES Calculation of Gd-0 reactivity worth compared with 2319000200043 experiment: C/E-1 2319000200044 Sample JEFF3.1.1 JEFF3.2beta 2319000200045 U-Gd1 -2.6 +- 0.9% -4.7 +- 0.9% 2319000200046 U-Gd2 -0.8 +- 0.8% -2.6 +- 0.8% 2319000200047 U-Gd3 1.0 +- 0.7% -0.5 +- 0.7% 2319000200048 Al-Gd1 -1.7 +- 0.9% -4.6 +- 0.9% 2319000200049 Al-Gd2 1.1 +- 0.7% -1.3 +- 0.7% 2319000200050 Al-Gd3 0.6 +- 0.7% -0.3 +- 0.7% 2319000200051 H2O-Gd1 2.3 +- 2.4% -5.4 +- 2.4% 2319000200052 H2O-Gd2 1.9 +- 1.9% -5.2 +- 1.9% 2319000200053 H2O-Gd3 1.5 +- 1.8% -6.2 +- 1.8% 2319000200054 Calculation of Gd-0 reactivity worth extrapolated to 2319000200055 the infinite dilution compared with the experiment is 2319000200056 presented in Table IX of C,2012KNOX,,(186),2012. 2319000200057 ENDBIB 55 0 2319000200058 NOCOMMON 0 0 2319000200059 DATA 3 1 2319000200060 EN DATA DATA-ERR 2319000200061 EV B B 2319000200062 0.0253 49360. 790. 2319000200063 ENDDATA 3 0 2319000200064 ENDSUBENT 63 0 2319000299999 ENDENTRY 2 0 2319099999999