Top Banner
Nuclear data: ission yields, decay heat and neutron reaction cross sections A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey & York
13

Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

Dec 20, 2015

Download

Documents

Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

Nuclear data: fission yields, decay heat and neutron reaction cross sections:

A Proposal for a Nuclear Data Consortium

Universities of Manchester, Surrey & York

Page 2: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

nTOF

TAS

STEFF

3 Strands

Page 3: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

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

Page 4: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

nTOF: Class A International Facility

Page 5: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

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.

Page 6: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

Fission fragment spectrometer “STEFF”

(running off-line at Manchester with 252Cf – later moves to GANIL - NFS)

Page 7: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

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

Page 8: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

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.

Page 9: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

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

Page 10: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

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

Page 11: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

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.

Page 12: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

Project Workplan

Page 13: Nuclear data: fission yields, decay heat and neutron reaction cross sections: A Proposal for a Nuclear Data Consortium Universities of Manchester, Surrey.

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