NEA-1759 IRPHE/BERENICE.
IRPhE/BERENICE, effective delayed neutron fraction measurements
NAME OR DESIGNATION, COMPUTER, DESCRIPTION, STATUS, REFERENCES, LANGUAGE, SOFTWARE REQUIREMENTS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| IRPHE/BERENICE | NEA-1759/01 | Arrived | 01-FEB-2006 |
Machines used:
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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
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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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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Keywords: alpha-rossi, delayed neutrons, plutonium, reactivity, uncertainties, uranium.