Research Papers: Nuclear Power

Postirradiation Testing of High Temperature Reactor Spherical Fuel Elements Under Accident Conditions

[+] Author and Article Information
D. Freis, D. Bottomley, J. Ejton, W. de Weerd, H. Kostecka, E. H. Toscano

Institute for Transuranium Elements, European Commission-Joint Research Centre, Postfach 2340, Karlsruhe 76344, Germany

J. Eng. Gas Turbines Power 132(4), 042901 (Jan 15, 2010) (6 pages) doi:10.1115/1.3094020 History: Received October 20, 2008; Revised October 21, 2008; Published January 15, 2010; Online January 15, 2010

A new furnace for accident condition testing of spherical high temperature reactor fuel elements has been installed and now operates in the hot cells of the Institute for Transuranium Elements (ITU) Karlsruhe. The recent apparatus was constructed on the basis of a former development by Forschungszentrum Jülich (Schenk, Pitzer, and Nabielek, 1988, “Fission Product Release Profiles From Spherical HTR Fuel Elements at Accident Temperatures  ,” Jülich Report No. 2234), where it was named KüFA, the German acronym for cold finger apparatus. In a preceding publication (Kostecka, Ejton, de Weerd, and Toscano, 2004, “Post-Irradiation Testing of HTR-Fuel Elements Under Accident Conditions, Part 1 and 2  ,” Second International Topical Meeting on High Temperature Reactor Technology, Beijing, China) the general concept and details of the device were described. The present paper reports on the first operation under hot conditions, and the calibration of the fission gas measurement and of the efficiency of the cold finger, which is used to plate out solid fission products. Finally the results of fission product release and analysis of two heating tests on two fuel elements from the high temperature reactor K6 irradiation experiment (Nabielek, Conrad, Roellig, and Meyers, 1993, “Fuel Irradiation Experiments on HFR-K6 and HFR-B1 With Intermittent Water Vapour Injections  ,” Technical Committee Meeting on Response of Fuel, Fuel Elements and Gas Cooled Reactor Cores Under Accidental Air or Water Ingress Conditions, Beijing, China, Oct. 25–27) are presented and discussed.

Copyright © 2010 by American Society of Mechanical Engineers
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Figure 1

Cold finger device

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Figure 2

Calibration curve for fission gas measurement

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Figure 3

Crucible for efficiency determination

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Figure 4

Heating program for AVR 73/21

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Figure 5

Heating test AVR 74/18

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Figure 6

SEM picture of a failed HFR K6/3 coated particle

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Figure 7

Heating test HFR K6/3

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Figure 8

Heating test HFR K6/2



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