Gamma-irradiation facilities at SCK CEN. A.Gusarov BEX Unit, SCK CEN

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1 Gamma-irradiation facilities at SCK CEN A.Gusarov BEX Unit, SCK CEN October

2 Gamma-Irradiation Facilities I. Cobalt-60 BRIGITTE 1-16 kgy/h* RITA Gy/h* CAL <1 Gy/h (dry cell) *Here and below the values for RITA and BRIGITTE as for 01/10/2016. Subject to decrease with time due to Co60 natural decay. II. Spent Fuel (Cs-137) GEUSE II kgy/h 2

3 RITA: Co 60 under-water irradiation facility Available volume (max): Ø38 cm, h = 60 cm (with some conditions Ø43 cm) Ambient temperature: C Temperatures up to 250 C are possible with an oven (smaller volume) Cylindrical Container for irradiated samples Container in the irradiation position: Co 60 sources emit blue light Cherenkov radiation Available dose-rates: Gy/h. The dose-rate is adjusted by changing the position of Co 60 sources and changing the vertical position of the samples in the chamber, max dose-rate over ~15 cm height (<10% gradient) 3

4 Connections to RITA 4

5 Relative Intensity GEUSE II: Spent fuel Dose Rate Gy/h 137 Cs - spectrum Under water view 900 mm Energy (MeV) 380 mm On-line instrumentation see RITA 5

6 600 mm Pressure (mbar) VSM Vacuum System Module for RITA and GEUSE II Designed for polymer irradiation Active low-vacuum 10-6 mbar 200 mm Time (h) 6

7 BRIGITTE: High Dose-Rate under water Irradiation Facility Relative Intensity Pos A Pos B Dose Rates kgy/h 60 Co - spectrum (blue light Cherenkov radiation Co 60 sources View from top Energy (MeV) In both A and B positions the dose-rates are similar, Pos B has a bigger cylindrical volume available for irradiations: Ø19 cm for B and Ø6 cm for A. 7

8 900 mm BRIGITTE B Irradiation container is a cylinder The dose rate-has a vertical gradient because the Co60 sources has length ~18 cm and centered at the mid-plain simultaneous irradiations at different dose-rates On a horizontal plane the doserate variations are within ±5% The dose-rate variations are within ±5% in ~10 cm height around the mid-plain Temperature up to 300 C Inert gas or air On-line instrumentation (see RITA) Side view 190 mm Container open mm is the inside diameter of the basket 8

9 Typical optical fiber measurement Set-up LS flexible OS 1x8 connector Irrad. rig ref OSA FC/PC OS 1x8 Scanner TC fibers LS - Light source; OS optical switch OSA spectrum analyzer 9

10 Connections in BRIGITTE B 10

11 Elevated temperatures in BRIGITTE B 100 C 250 C 350 C 11

12 CAL Bunker Inside View Bunker Low dose-rate irradiation facility Output Source View Room temperature ~21 C Atmosphere and humidity control Max Dose Rate: 1 Gy/h See: 12

13 Web-site for info /Irradiations/Gamma_BR2 13

14 Copyright notice Copyright SCK CEN All property rights and copyright are reserved. Any communication or reproduction of this document, and any communication or use of its content without explicit authorization is prohibited. Any infringement to this rule is illegal and entitles to claim damages from the infringer, without prejudice to any other right in case of granting a patent or registration in the field of intellectual property. SCK CEN Studiecentrum voor Kernenergie Centre d'etude de l'energie Nucléaire Stichting van Openbaar Nut Fondation d'utilité Publique Foundation of Public Utility Registered Office: Avenue Herrmann-Debrouxlaan 40 BE-1160 BRUSSEL Operational Office: Boeretang 200 BE-2400 MOL