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Proceedings Paper

NDE of copper canisters for long-term storage of spent nuclear fuel from the Swedish nuclear power plants
Author(s): Tadeusz Stepinski
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Paper Abstract

Sweden has been intensively developing methods for long term storage of spent fuel from the nuclear power plants for twenty-five years. A dedicated research program has been initiated and conducted by the Swedish company SKB (Swedish Nuclear Fuels and Waste Management Co.). After the interim storage SKB plans to encapsulate spent nuclear fuel in copper canisters that will be placed at a deep repository located in bedrock. The canisters filled with fuel rods will be sealed by an electron beam weld. This paper presents three complementary NDE techniques used for assessing the sealing weld in copper canisters, radiography, ultrasound, and eddy current. A powerful X-ray source and a digital detector are used for the radiography. An ultrasonic array system consisting of a phased ultrasonic array and a multi-channel electronics is used for the ultrasonic examination. The array system enables electronic focusing and rapid electronic scanning eliminating the use of a complicated mechanical scanner. A specially designed eddy current probe capable of detecting small voids at the depth up to 4 mm in copper is used for the eddy current inspection. Presently, all the NDE techniques are verified in SKB's Canister Laboratory where full scale canisters are welded and examined.

Paper Details

Date Published: 16 July 2003
PDF: 9 pages
Proc. SPIE 5048, Nondestructive Detection and Measurement for Homeland Security, (16 July 2003); doi: 10.1117/12.484346
Show Author Affiliations
Tadeusz Stepinski, Uppsala Univ. (Sweden)


Published in SPIE Proceedings Vol. 5048:
Nondestructive Detection and Measurement for Homeland Security
Steven R. Doctor; Yoseph Bar-Cohen; A. Emin Aktan, Editor(s)

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