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