Nuclear data: fission yields, decay heat and neutron reaction cross sections:
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Nuclear data: ission yields, decay heat and neutron reaction cross sections A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey & York
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Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey & York. 3 Strands. nTOF TAS STEFF. Nuclear Data: Collection, Dissemination and Usage. Industrial Nuclear Data. - PowerPoint PPT Presentation
Transcript of Nuclear data: fission yields, decay heat and neutron reaction cross sections:
Nuclear data: fission yields, decay heat and neutron reaction cross sections:
A Proposal for a Nuclear Data Consortium
Universities of Manchester, Surrey & York
nTOF
TAS
STEFF
3 Strands
ENDF (USA)BROND (Former USSR)JENDL (Japan)
JEFF (Europe)
WPEC (NEA OECD)
UK Nuclear Industry
Private Companies:Serco,Studsvik of America,CEA, etc.
Academic Nuclear Data mostly for physics
IndustrialNuclear Data
Codes. Reactors. Databases. Safety.
Nuclear Data: Collection, Dissemination and Usage
nTOF: Class A International Facility
nTOFRecruit Research Fellow (C-NET)
Formally join nTOF.
Contribute to equipment, target material, join in running experiment shifts and analysis work.
Network York, (NNL support for Manchester activities)
Support data evaluation effort, dissemination.
Interests: initially with neutron capture cross section measurements relevant to current and new generation reactors as identified in NEA High Priority Request List (238U, 241Am, 243Am) New proposal to the INTC PAC in Nov 2010:Fission of 240/242Pu, 245Cm, 232/234Th, 238U, Ratio( 238U/235U ).
Later through consultation.
Fission fragment spectrometer “STEFF”
(running off-line at Manchester with 252Cf – later moves to GANIL - NFS)
Anode signal After digital filtering Noise < 0.2%
2 2
2A E T
A E T
~£250 k already invested
Current Mass resolution ~4%
Upgrade: increase T by factor 3
Novel Digital Pulse-shape analysis
Low-noise energy measurements
Z sensitivity ~ 1/40
STEFF Upgrade and NFS Programme
Increase FF flight path to 3m
Maintain solid angle
Obtain mass resolution ~ 1%
After discussions with NNL, suggest: 238U, 239Pu and 237Np, En=1-20 MeV.
Lucrecia, Total Absorption Gamma Spectrometer at CERN / Jyvaskyla
• A large NaI cylindrical crystal 38 cm Ø, 38cm length
• An X-ray detector (Ge)• A detector• Collection point inside the
crystal
TAGS response for TAGS response for 2222Na Na source and Monte Carlosource and Monte Carlo
Proposed:89,90Kr, 96Y, 99,100Zr, 98,99,102Nb, 103Mo, 103Tc, 132Sb, 135Te, 136,136mI, 139,140Xe, and 143La. (WPEC Priority-1 Nuclei)
TAS Programme
Significant discrepancies (i.e. factors of 2-3 in some cases) between Significant discrepancies (i.e. factors of 2-3 in some cases) between JEFF and TAGSJEFF and TAGS
J. Billowes + NDA Student
Manchester R.F. (C-NET) R. Mills (V.F, NNL)
A.G. Smith
nTOF Collaboration
P. ReganZ. PodolyakStudent
W. Gelletly A. Nichols
D. JenkinsStudent
TAS
Manchester
Surrey
York
nTOF
JEFF etc.
TAS Collaboration
STEFF
NFS
UKNSF: Nichols (Chair), Mills, Billowes, Regan.
Project Workplan
Required Resources
• 2 studentships• Staff effort• nTOF subscription• STEFF upgrade capital• Travel and subsistence
Cost to EPSRC: £533 k
Deliverables
• Fission yield measurements• Upgraded STEFF • TAS results:• nTOF results:• at least 2 trained students in nuclear data• Contribution to databases
Benefits
• Better links between academia and nuclear data community • Better links between academics interested in applied physics• Reengagement of UK with international nuclear data effort • Increased UK international profile• Improved applied infrastructure• Support and enhancement of UK nuclear physics expertise
