PROGRESS OF NUCLEAR DATA MEASUREMENT IN CHINA

Transcription

1 Presentation for the WPEC-2014 meeting May 2014 Paris, France PROGRESS OF NUCLEAR DATA MEASUREMENT IN CHINA (2013) GE Zhigang RUAN Xichao China Nuclear Data Center(CNDC) China Committee of Nuclear Data(CCND) China Institute of Atomic Energy(CIAE) P.O.Box ,Beijing , P.R.China

2 Presentation for the 24 th Meeting of the NEA WPEC May 2012 Paris, France I. Institutes involve in nuclear data measurement in China Excitation function, FY, gamma production yields, DX and DDX, benchmark experiments, etc (n,lcp) reaction Excitation function around 14 MeV ADS related (proton induced) Th-U cycle related Integral experiments

3 Neutron sources in China Presentation for the 23 rd Meeting of the NEA WPEC Facilities Neutron energy Intensity (1/s/sr) reactor thermal n/cm 2 /s CIAE HI-13 Tandem MV Small tandem 8-26 MeV (d+d) 4-23 MeV (p+t) MeV (d+t) 3-6 MeV (d+d) MeV (d+t) MeV (p+t) MeV (p+li) Neutron generator 2.5, 14 MeV 10 8,10 10 Neutron generator in LZU 2.5, 14 MeV (DC) Other facilities in china will not exceed this list in neutron energy and intensity

4 CPM Presentation for the 23 rd Meeting of the NEA WPEC II. Recent Progress of Nuclear Data Measurement in China Fission yield for 235 U at 3 MeV 235 U source Sample irradiation 1.00E+03 拟合线 537.3KeV 1.00E+02 Measurement 1.00E E TIME(DAY)

5 Measured results. All data are normalized to 140 Ba(5.8%) Products 1 st measurem ent 2 nd measurem ent Averaged yields Absolute uncertainty Relative uncertainty Zr-95 Zr-97 Mo-99 Ru-103 Ba-140 Nd % % % % % %

6 Presentation for the 24 th Meeting of the NEA WPEC May 2012 Paris, France Nuclear data benchmark experiment Measure the neutron leakage spectrum from slab samples for different angles with a 14 MeV d-t neutron source 样品 4140 偏转磁铁 倍加器大厅 探测器 6250 实验大厅 4500 屏蔽网 * 头部 6500 配电室 墙厚 250

7 , experimental system improved 2013, data taken for Be, Ga, nat Fe and liquid Pb-Bi alloy 2014, Th and W

8 计数 / 单位源中子 *cm 2 Presentation for the 23 rd Meeting of the NEA WPEC Verify the experimental system with a PE sample 8.00E E E E-013 模拟 ch2 实验 ch2 4.00E E E E E E 时间 /ns

9 Preliminary result for Be Presentation for the 23 rd Meeting of the NEA WPEC Discrepancies at low energy region are caused by improper detection efficiency (a new detector before calibration)

10 Iron sample Presentation for the 23 rd Meeting of the NEA WPEC

11 Ga sample Presentation for the 23 rd Meeting of the NEA WPEC

12 Presentation for the 24 th Meeting of the NEA WPEC May 2012 Paris, France (n, x ) measurement at Peking University The reaction cross sections of 57 Fe(n,a) 54 Cr and 63 Cu(n,a) 60 Co were measured with the 4.5 MV Van de Graaff accelerator of Peking University at 5.0, 5.5, 6.0 and 6.5 MeV. Alpha particles were detected with a double-section gridded ionization chamber having two back-to-back samples attached to the common cathode. Absolute neutron flux was measured using a small 238 U fission chamber and monitored by a BF3 long counter. The measured results were compared with TALYS calculations, evaluated data and other measurements. Experimental apparatus of (n,x) measurement at Peking University.

13 Cross Section (mb) Cross Section (mb) Presentation for the 24 th Meeting of the NEA WPEC May 2012 Paris, France ENDFB-VII.1=FENDLE-2.1=ROSFOND-2010 JENDL-4.0=CENDL-3.1 JEF-2.2 EAF-2010 TENDL-2012 BROND-2.2 JEFF present work ENDF/B-VII.1=JEFF =ROSFOND-2010=FENDL/E-2.1 JENDL-4.0 CENDL-3.1 TENDL-2012=IRDFF G.Winkler(1980) [Ref.4] H. Liskien(1965) [Ref.3] Present work Neutron Energy (MeV) Neutron Energy (MeV) 57 Fe(n,α) 54 Cr reaction. 63 Cu(n,a) 60 Co reaction

14 Presentation for the 24 th Meeting of the NEA WPEC May 2012 Paris, France III. New facilities for ND measurement China Spallation Neutron Source (CSNS) LINAC at SINAP PISA at IMP

15 The back streaming neutron source of CSNS Presentation for the 23 rd Meeting of the NEA WPEC

16 Endstation 1: 55 meters Endstation 2: 80 meters Presentation for the 23 rd Meeting of the NEA WPEC

17 The CSNS parameters United States Europe China Parameters ORELA LANSCE WNR RPI GELINA CERN n_tof CSNS-I Back-n Accelerator e- linac p-synch p-linac e- linac e- linac p-synch p-synch Energy (GeV) > Flight (m) , 80 Pulse (ns) (6) B. Power (kw) > Rep. rate (Hz) k Max Time res. (ns/m) n yield (n/s) Back-n: The most intensive neutron source

18 Comparing with CERN ntof: 1. Source intensity and energy range: the CSNS is good 2. Resolution: not good but acceptable The CSNS can provide two special operation modes to get better resolution

19 The following neutron cross section measurements are planed at CSNS (n,t): neutron total cross section (n,f): fission cross section (n, ): neutron capture cross section (n,x): neutron induced charged particle emission PFNS: prompt fission neutron spectra (n,n ) and (n,2n ): inelastic scattering and gamma production cross sections from neutron induced reactions

20 (n,g) PFNS Neutron beam Fission chamber gamma (n,lcp) Neutron detectors 靶室 探测器 中子束 样品 束流监视器

21 Progress Civil construction undergoing Physical design of the neutron beamline, shutter, collimator and beam dump finished. Technical design started Design of the detectors started Hope the source and the detector systems can be ready in 2018 RTBT tunnel WNS tunnle 21

22 3 beam profiles are designed for different measurements ~10 8 ~10 6 ~10 5 φ30mm φ60mm 90mm*90mm

23 The Study of the Th/U Cycle Nuclear Data in TMSR Reactor Physics Division, Center for Thorium Molten Salt Reactor System, SINAP,CAS 钍基熔盐核能系统

24 Detector system The LINAC at SINAP Presentation for the 23 rd Meeting of the NEA WPEC The Important progress - 15MeV Photon-neutron sourceⅠ Project layout Accelerator design Neutron target system Design

25 Recent commissioning Presentation for the 23 rd Meeting of the NEA WPEC

26 Comparison with other neutron source facility based on the electron LINAC

27 Neutron & photon flux(n/s/cm 2 ) at 90 direction relative to electron beam 15MeV Electron(2kW )+W 0.5m/(n/s/cm2) 5m/(n/s/cm2) Neutron 1.51E E+05 Photon 1.81E E+08 Planed measurements: Th/U cycle related materials 1. Transmission measurements 2. Capture measurements 2014/5/14

28 ADS related nuclear data measurements for spallation target at IMP,CAS 2014/5/14 Zhiqiang Chen ADS Nuclear Data Laboratory Institute of Modern Physics, Chinese Academy of Sciences(IMP,CAS)

29 HIRFL-CSR Complex in Lanzhou Proton:2.5GeV PISA terminal is used for ADS Nuclear data measurements.

30 Nuclear data measurement facilities Neutron activation method

31 Experiments performed in recent years 2012: 400 AMeV 12 C + Pb (thick targets,naked targets) Neutron activation method 2013: 400 AMeV 12 C + Pb/W (thick targets, targets in water tanker) neutron activation method AMeV 12 C + H 2 O LCPs detector tests 2014: 250 AMeV H Pb/W (thick targets) Neutron activation method 400 AMeV 16 O + Pb/W (thin,thick targets) Online measurement detectors and DAQ system test BC501A neutron detectors for neutron measurements Plastic + CsI(Tl) detectors for LCPS.

32 400 AMeV 16O + Pb/W experiments Experimental setup Electronics and DAQ systems

33 Results for neutron and LCPs measurements

34 400 AMeV 12C + Pb experiment (neutron activation method)

35 Results for radioactivity Activation foil arrangement MCNPX simulation Experimental data

36 Thank you for your attention! Comments and suggestion welcome! Presentation for the 24 th Meeting of the NEA WPEC May 2012 Paris, France