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Abstract

The technical feasibility of explosive dismantling of activated concrete in the biological shield has been successfully demonstrated within the frame of Niederaichbach nuclear plant dismantling project. Two methods have been tested: short-borehole blasting and long-borehole blasting. The results of the tests show that for the case of a massively reinforced biological shield, in particular heavy baryte concrete, explosive dismantling by borehole blasting technique is technically feasible and economically recommendable. The specific advantage of the method is the generation of small size rubble which can be easily handled and the total separation of concrete and steel reinforcement such that both materials may be separately conditioned. A combination of explosive fragmentation and cracking and subsequent hydraulic chisel impact to remove the remaining fragmented concrete from the reinforcement array has proven to be particularly successful. As a consequence of these results recommendation for general application are given and improved data to be used as a basis for estimating the structural load are described. Explosive concrete dismantling is compared to other envisaged methods for biological shield dismantling to the extend of available documented information.

Additional information

Authors: FREUND H U, Battelle Ingenieurtechnik GmbH (DE);BÄCHLER M, NOELL GmbH (DE);OBST J, NOELL GmbH (DE);KRUTZIK N, Siemens-KWU (DE);TROPP R, Siemens-KWU (DE);ZINN R, Stangenberg, Schnellenbach & Partner (DE)
Bibliographic Reference: EUR 16867 DE (1996) 103pp., FS, ECU 13.50
Availability: Available from the (2)
ISBN: ISBN 92-827-6620-9
Record Number: 199610790 / Last updated on: 1996-08-30
Category: PUBLICATION
Original language: de,en
Available languages: de,en