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NEA-1759 IRPHE/BERENICE.

IRPhE/BERENICE, effective delayed neutron fraction measurements

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1. NAME OR DESIGNATION

IRPHE/BERENICE.

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2. COMPUTERS
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Program name Package id Status Status date
IRPHE/BERENICE NEA-1759/01 Arrived 01-FEB-2006

Machines used:

No specified machine
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3. DESCRIPTION

BERENICE is an international experimental campaign relative to benchmark measurements of the effective delayed neutron fraction (beta_eff). It consists of two phases:

 

  • BERENICE - CORE R2: uranium core with an enrichment of 30% in U-235 with basic cell-type R2.

  • BERENICE - CORE Pu: plutonium core with a Pu-239 content of 25% with basic cell-type ZONA 2.

 

The objectives of the measurements are to reduce the uncertainties of the
effective delayed neutron fraction, using different methods:

 

  • measurement of natural neutronic flactuations in the core

  • measurements of alpha-Rossi

  • measurements of pseudo reactivity of Cf source

 

BERENICE - CORE  R2 Experimental programme
Uranium configuration (cell-type : R2). This phase involves two configurations :

 

  • The clean core with 1006 cells,

  • The core modified by the presence of four large fission chambers with 1036 cells.
    This measurement concerns:
    The core characterisation such as:

  • Critical radius

  • Reactivity of control rods, pilot rod, and peripheral cells

  • Power normalisation

  • Temperature effects
    and beta_eff specific measurements

  • U-235 and U-238 fission rate distribution

  • Cf source worth distribution

  • Spectral indices

  • Pile noise, alpha-Rossi, other techniques

 

BERENICE - CORE Pu Experimental programme
Plutonium configuration (cell-type : ZONA 2). This phase involves two critical configurations BERENICE-Pu/EXP.
The fuel is arranged in concentric zones: UO2-PuO2 with a Pu-240 content of 18% and a Pu content of dioxide of 25%.
This phase involved a clean core with 1111 cells.
The measurements concern :

 

  • critical radius

  • reactivity of control rod

  • power normalisation

  • temperature effects

  • U-235, U-238, Pu-239 and Np-237 fission rate distributions

  • Cf source worth distribution

  • Spectral indices

  • Pile noise, and Cf source worth

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9. STATUS
Package ID Status date Status
NEA-1759/01 01-FEB-2006 Arrived restricted
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10. REFERENCES
NEA-1759/01, included references:
- F. Lopez, J. Pont, M. Martini, M. Wacongne:
INB 39 - MASURCA Rapport de surete du chargement du coeur BERENICE - R2
experiences prevues, CEA NT93/03, 01 February 1993
- P. Bertrand, B. Franklin, M. Martini, J. Pierre:
BERENICE - CORE  R2 The experimental programme, CEA NT93/18, 12 February 1993
- F. Lopez, M. Martini, M. Maziere, J. Pont:
INB 39 - MASURCA Rapport de surete du chargement du coeur BERENICE - Pu
experiences prevues, CEA NT93/57, 30 July 1997
- M. Martini, J. Pierre:
BERENICE - CORE ZONA2 The experimental results, CEA NT94/127
- Meeting summaries of BERENICE
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12. PROGRAMMING LANGUAGE(S) USED
No specified programming language
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13. SOFTWARE REQUIREMENTS

Microsoft Office, Acrobat Reader, HTML Browser

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15. NAME AND ESTABLISHMENT OF AUTHORS

Ch. Mergui, P. Fougeras, P. Blaise, F. Mellier
Commissariat a l'Energie Atomique
Centre d'Etudes de Cadarache
DRN/DER/SPEx
Batiment 238
F-13108 ST PAUL LEZ DURANCE
FRANCE

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16. MATERIAL AVAILABLE
NEA-1759/01
Html index
Readme file
Archive PDF files
1 Excel table
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17. CATEGORIES
  • Y. Integral Experiments Data, Databases, Benchmarks

Keywords: alpha-rossi, delayed neutrons, plutonium, reactivity, uncertainties, uranium.