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FP7

Helium-cooled test blanket module box behaviour under accidental pressurisation

Funded under: FP7-EURATOM

Abstract

The helium-cooled lithium-lead (HCLL) breeder blanket concept is one of the two breeder blanket lines presently developed by the EU for DEMO reactor. In the short-term so-called DEMO relevant test blanket modules (TBMs) of these breeder blanket concepts shall be designed, manufactured, tested, installed, commissioned and operated in ITER for first tests in a fusion environment.
For the purpose of licensing such test module in the ITER facility, a safety assessment of the different possible accidental conditions has to be performed. This paper presents the results of the thermo-mechanical calculations that have been obtained in case of internal module leak occurring between the 8.0 MPa pressurised helium circuit and the lithium-lead circuit. In a conservative manner, it is also assumed that helium cooling of the TBM box is stopped at the accident initiation.
In such situation the TBM box will be entirely pressurised at 8.0 MPa and the different challenges are related to the thermo-mechanical behaviour, the plasma power hold up and the heat removal capacity of the module. An assessment to estimate the time when the TBM box can withstand the different loads induced by the situation is presented. Particularly the available time span to trigger an emergency plasma shutdown is estimated in regards of the maximal allowable stress for the EUROFER which is the test blanket module material.

Additional information

Authors: GIRARD C, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);SCHMIDT N, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);SALAVY J-F, CEA Saclay, Gif-sur-Yvette (FR);RAMPAL G, CEA Saclay, Gif-sur-Yvette (FR)
Bibliographic Reference: An article published in: Fusion Engineering and Design, Volume 83, Issues 10-12 (2008), 4 pp.
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/10.1016/j.fusengdes.2008.07.042
Record Number: 200910135 / Last updated on: 2009-01-23
Category: PUBLICATION
Original language: en
Available languages: en
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