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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.

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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


Nuclear data fission yields decay heat and neutron reaction cross sections

3 Strands

nTOF

TAS

STEFF


Nuclear data fission yields decay heat and neutron reaction cross sections

Nuclear Data: Collection, Dissemination and Usage

Industrial

Nuclear Data

Academic Nuclear Data

mostly for physics

UK Nuclear Industry

Codes. Reactors.

Databases. Safety.

WPEC (NEA OECD)

ENDF (USA)

BROND (Former USSR)

JENDL (Japan)

JEFF (Europe)

Private Companies:

Serco,

Studsvik of America,

CEA, etc.


Nuclear data fission yields decay heat and neutron reaction cross sections

nTOF: Class A International Facility


Nuclear data fission yields decay heat and neutron reaction cross sections

nTOF

Recruit 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.


Nuclear data fission yields decay heat and neutron reaction cross sections

Fission fragment spectrometer “STEFF”

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


Nuclear data fission yields decay heat and neutron reaction cross sections

~£250 k already invested

Current Mass resolution ~4%

Upgrade: increase T by factor 3

Anode signal After digital filtering

Noise < 0.2%

Novel Digital Pulse-shape analysis

Low-noise energy measurements

Z sensitivity ~ 1/40


Nuclear data fission yields decay heat and neutron reaction cross sections

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

Lucrecia, Total Absorption Gamma Spectrometer at CERN / Jyvaskyla

  • A large NaI cylindrical crystal38 cm Ø, 38cm length

  • An X-ray detector (Ge)

  • A  detector

  • Collection point inside the crystal

TAGS response for 22Na

source and Monte Carlo


Nuclear data fission yields decay heat and neutron reaction cross sections

TAS Programme

Significant discrepancies (i.e. factors of 2-3 in some cases) between JEFF and TAGS

Proposed:

89,90Kr, 96Y, 99,100Zr, 98,99,102Nb, 103Mo, 103Tc, 132Sb, 135Te,

136,136mI, 139,140Xe, and 143La. (WPEC Priority-1 Nuclei)


Nuclear data fission yields decay heat and neutron reaction cross sections

nTOF

nTOF Collaboration

D. Jenkins

Student

York

JEFF etc.

Manchester

J. Billowes + NDA Student

Manchester R.F. (C-NET) R. Mills (V.F, NNL)

A.G. Smith

NFS

P. Regan

Z. Podolyak

Student

W. Gelletly A. Nichols

Surrey

STEFF

TAS

TAS Collaboration

UKNSF: Nichols (Chair), Mills, Billowes, Regan.


Nuclear data fission yields decay heat and neutron reaction cross sections

Project Workplan


Nuclear data fission yields decay heat and neutron reaction cross sections

  • 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


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