Active Handling Experiment with Neutron Sources

Projektinformationen

AHE

ID Finanzhilfevereinbarung: FI2W0069

Projekt abgeschlossen

Startdatum 1 Mai 1991

Enddatum 30 September 1995

Finanziert unter

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

Gesamtkosten

€ 2 604 000,00

EU-Beitrag

€ 1 171 734,00

Koordiniert durch

Forschungszentrum Karlsruhe Technik und Umwelt GmbH
Germany

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Veröffentlichungen

Other (1)

Active handling experiment with neutron sources (AHE)

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

Verwertbare Ergebnisse

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.