Contribution to a conference proceedings/Contribution to a book

IMPULSE-2022-00235

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Gamma irradiations using spent fuel elements at FRM II

Li, X.MLZ* ; Hutanu, V.MLZ* ; Bulla, S.MLZ* ; Molch, J.MLZ* ; Jeschke, F.MLZ*

2022

ISBN: 978-92-95064-38-6

Abstract: A gamma-irradiation facility is constructed for irradiations of samples in the spent fuel elements at the FRM II. It consists of a double-walled watertight sample container and a positioning device to adjust the sample position for a homogeneous irradiation. Samples can be heated up to 140°C with a temperature stability <1°C over a long irradiation time (weeks). A control system monitors the sample irradiation and visualizes the process parameters remotely on-line. The typical gamma dose rate ranges from 0.05 kGy/h up to 50 kGy/h depending on the cooling time of the fuel elements. Decay of the gamma dose rate and its axial profile in a total length of 70 cm in the active zone was detected using Harwell PMMA-dosimeters. Concepts for achieving an irradiation uniformity for research of microstructure in halite with a typical target dose up to 4 MGy will be introduced.

Keyword(s): Instrument and Method Development (1st) ; Instrument and Method Development (2nd) ; Industrial Application (2nd)

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Contributing Institute(s):

1. IRRAD (IRRAD)
2. MLZ (MLZ)
3. CNSI (RPHYSICS ; CNSI)

Experiment(s):

1. Irradiation facility

Appears in the scientific report 2022

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