NEA-1764 IRPhE-TAPIRO-ARCHIVE

1. NAME OR DESIGNATION OF PROGRAM:  IRPhE-TAPIRO-ARCHIVE.

3. DESCRIPTION OF PROGRAM OR FUNCTION

The TAPIRO reactor, located in the ENEA Casaccia Centre near Rome, is a highly enriched uranium fast neutron facility. The nominal power is 5 kW (thermal) and the core centre neutron flux is 4.E12/cm**2/s. The reactor has a cylindrical core (12.6 cm diameter and 10.9 cm height) made of 93.5 % enriched uranium metal in a uranium-molybdenum alloy which is totally reflected by copper. The copper reflector (cylindrical-shaped) is divided into two concentric zones: the inner zone, up to 17.4 cm radius, and the outer zone up to 40.0 cm. Radius. The height of the reflector is 72.0 cm. The reactor is surrounded by borate concrete shielding about 170 cm thick. The maximum depth available for the epithermal column is 160 cm, reserved for filter/moderator materials.
The graphite column extends to the external reflector boundary where a sector of the outer copper reflector has been removed and then characterized by a very hard neutron spectrum. Along the column the spectrum gradually softens up to thermal values
- Different materials can be interposed, such as U-nat, Pb, Fe, etc. to reproduce spectrum transition conditions at interface points between regions with different compositions.
- Activation foils can be used for activation analysis with threshold energies in the fast, intermediate and epithermal regions.
   
The archive contains reports characterising the reactor and describes experiments carried out, together with the corresponding data.

-Prepared by A. Fabry, SCK-CEN, Moll, Belgium:
Neutronic characterization of the TAPIRO fast-neutron source reactor
Final report, vol.1, 2, 3, 4
For ENEA, Casaccia, Italy

-A. Gibello, P. Moioli, F.V. Orestano and F. Pistella:
Comparison between calculations and experiments in a microcattice with Europium
simulationg plutonium
Comitado Nazionale Energia Nucleare
Abstract "Journal of Nuclear Energy", vol.24, pp.235-260, 1970

-D. Antonini, M.L. Bargellini, M. Martini, P. Moioli:
Esperienze di diffusione neutronica in sodio mediante il reattore sorgente
veloce TAPIRO
Comitado Nazionale Energia Nucleare
RT/FI(78)4, May 1978

-A. Gibello, F.V. Orestano, F. Pistella and E. Santandrea:
Physics experiments in a PuO2-UO2 microlattice for the design of fuel elements
in LWRs
CSN Casaccia, March 1971

-M. Carta, A. De Carli, R. Martinelli, P. Moioli - CSN Casaccia, CNEN;
G. Daguzan, M. Salvatores, J.P. Trapp - CEN Cadarache, CEA:
Spectrum characterization in a simulated FR blanket region via activation of
threshold ans continuous detectors
Proceeding of the 4th ASTM-EURATOM Symposium on reactor dosimetry,
Graithersurg, Maryland, USA, March 22-26, 1982

-D. Antonini, P. Moioli, R. Scafe, P.G. Gabrielli:
Prova di critica' a freddo
CNEN-NUCLITAL, 24 July 1980, T/RP/79/012-3

-B. Agricola, N. Benatti, S. Felici, C. Leposcky, A. Linari, P . Moioli, F.
Pistella, A. Puliandri, R. Scafe:
Confronto Teoria-Esperienza per le distribuzioni di potenza nel nocciolo della
centrale del Garogliano alla fine del ciclo 5
Parte 1 : Procedure e risultati sperimentali
CNEN-ENEL, PIE(77)5

-A. Fabry, H. Ait Abderrahim, P. D'hondt, S. De Leeuw, G. De Leeuw-Gierts, G.
Minsart - SCK/CEN, Mol, Belgium;
P . Moioli, M. Angelone, M. Carta - ENEA C.R.E. Casaccia, Roma, Italy:
Learning from a joint Italian-Belgian neutronic characterization of the TAPIRO
source reactor
ASTM-EURATOM Symposium on reactor dosimetry, Strasbourg 27-31 Aug 1990

-D. Antonini, M. Carta, A. De Carli, R. Martinelli, P. Moioli, R. Scafe, A.
Vigo:
Programma Nefertiti, esperienze e calcoli relativi alla prima configurazione
CNEN

-M. Carta, A. de Carli, P. Moioli:
Esperienza di irragiamento del mock-up della griglia del pec.
CNEN, RIT/FIS, LTCR(81)1

-Results in neutron propagation in steel-sodium mixtures with various source
spectra on HARMONIE and TAPIRO
CNEN-NIRA, Italy
5th International Conference on shielding, Knoxville, USA, 18-22 April 1977
1 - J.C. Estiot, J.P. Trapp, G. Palmiotti, M. Salvatore:
Use of integral data for the prediction of neutron propagation in iron-sodium
mixtures.
2 - D. Calamand, A. Desprets, H. Rancurel, R. Vienot, J.C. Estiot, J.P. Trapp,
M.L. Bargellini, L. Bozzi, M. Martini, P. Moioli, D. Antonini, A. De Carli,
V. Rado:
Results of neutron propagation in steel sodium mixtures with various source
spectra on HARMONIE and TAPIRO.

-A. Fabry, P. D'hondt - SCK/CEN Mol, Belgium; M. Angelone, P.Moioli - ENEA
C.R.E. Casaccia, Italy:
Radiometric measurement of U-235 and Pu-239 fission yields from fast reactor
core spectrum to reflector/blanket degraded neutron spectra
VT-WHD-00013, 1988

-M. Angelone, M. Carta, A. De Carli, P.Moioli:
Stato di avanzamento del programma NEFERTITI
ENEA, FT-WHD-00002, October 1982

-M. Angelone:
Measurement of absolute reaction rates at the TAPIRO reactor for U-235 and
U-238 fission, and for U-238 capture by means of pure Germanium detectors
ENEA, VT-WHD-00007, 1986

-M. Angelone:
Determination of the core power of the TAPIRO reactor by means of fission rate
measurements using fuel pellets and U-235 foils
ENEA, VT-WHD-00012, 1989

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15. NAME AND ESTABLISHMENT OF AUTHORS

Dr. Renato TINTI
ENEA FIS-NUC
Via Martiri di Monte Sole, 4
I-40129 BOLOGNA, ITALY

Primary documents