Active Handling Experiment with Neutron Sources

Informazioni relative al progetto

AHE

ID dell’accordo di sovvenzione: FI2W0069

Progetto chiuso

Data di avvio 1 Maggio 1991

Data di completamento 30 Settembre 1995

Finanziato da

• Specific research and technical development programme (Euratom) in the field of management and storage of radioactive waste, 1990-1994

Costo totale

€ 2 604 000,00

Contributo UE

€ 1 171 734,00

Coordinato da

Forschungszentrum Karlsruhe Technik und Umwelt GmbH
Germany

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Pubblicazioni

Other (1)

Active handling experiment with neutron sources (AHE)

Autori: CLOSS K D (Forschungszentrum Karslruhe GmbH (DE))
Pubblicato in: EUR 17124 EN (1996) 177pp., FS, ECU 33 (euroabstract 35/455), 1996, Pagina/e 177, ISBN 92-827-8673-0

Risultati sfruttabili

Radiological aspects of handling high level waste in underground repositories

The project was a demonstration test which was performed by DBE and ANDRA/CEA in the Asse mine. The objective of this experiment was to investigate radiological aspects of handling spent fuel/high level waste in the drifts of an underground repository in a salt dome. As neutrons play an important role in the direct disposal option, main emphasis was laid on their contribution to total dose rate. Due to the narrow drift dimensions, backscattering of the neutrons from the drift walls had to be expected, thus increasing the dose rate for the operating personnel. The experimental results showed that the intensity of neutron backscattering from the drift walls depends upon the drift cross section and the position of the cask within the drift. The equivalent dose rate in the near-field of the cask during underground handling was two to three times higher than above ground. Predictions performed with the Monte Carlo programmes MORSE, MCNP and TRIPOLI were in excellent agreement with the experimental findings. Thus, validated computer codes are available for future detailed repository planning with emphasis on minimising radiation exposure of the operating personnel.