Concept for a vertical maintenance remote handling system for multi module blanket segments in DEMO

Coleman, M.; Sykes, N.; Cooper, Dave; Iglesias, Daniel; Bastow, R.; Loving, A.; Harman, Jon

doi:10.1016/j.fusengdes.2014.02.047

Cited by 22 publications

(12 citation statements)

References 2 publications

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“…The number of the segments installed in one compartment is given as n. The number of the segments in total, N segments , is 80. The thickness of the heavy concrete wall, F, is 1 m. The gap between the segment and the wall, G, is 1 m. The height of the compartment assumed as 22 m considering the space for the installation device of the shipping cask [8].…”

Section: Conceptual Design Of Temporally Storage Area In Hot Cellmentioning

confidence: 99%

“…However, the study on the temporally storage of the used blanket components in the hot cell is quite limited. It is proposed that the used blankets are removed from the vacuum vessel (VV) though the vertical port [7,8] as multi module segments, which are the back plate integrated blanket module. These segments must be stored temporally in the hot cell after the removal of residual tritium by thermal detritiation process [9].…”

Section: Introductionmentioning

confidence: 99%

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Conceptual Design of Temporally Storage Area in Hot Cell for Fusion DEMO Reactor

Kondo

Someya

Tsuji

et al. 2016

Plasma and Fusion Research

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In the maintenance procedure of fusion DEMO reactor, used in-vessel components are removed from the reactor vessel to be replaced. The temporally storage area for the used blanket segments is necessary. In the present work, the temporally storage area is conceptually designed as the used segments are stored dispersively in the plural compartments in the hot cell for the following dismantling procedure. The space dose rate of the compartment, where more than one segment is installed, was evaluated by means of the gamma ray transport calculation with PHITS Monte Calro analysis code. The space dose rate in the compartment decreases with time. For example, by the temporally storage of five used segments in one compartment for 20 years, the space dose rate in the compartment becomes lower than 250 Gy/hr, which is the limited value proposed for the remote handling in the ITER. The decay heat of the segments during the temporally storage is removed by flowing He. The segments are cooled at the temperature lower than 550• C. Then, the used back plates can be reused in the other operation of the reactor, since the mechanical properties of the back plates are not affected by the heat treatment during the temporally storage.

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Section: Conceptual Design Of Temporally Storage Area In Hot Cellmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Conceptual Design of Temporally Storage Area in Hot Cell for Fusion DEMO Reactor

Kondo

Someya

Tsuji

et al. 2016

Plasma and Fusion Research

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“…The maintenance of the blanket modules involves several operations carried out by equipment deployed in four different types of cask [15]:…”

Section: Upper Vertical Portmentioning

confidence: 99%

Pre-conceptual design assessment of DEMO remote maintenance

Loving

Crofts

Sykes

et al. 2014

Fusion Engineering and Design

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EDFA, as part of the Power Plant Physics and Technology programme, has been working on the preconceptual design of a Demonstration Power Plant (DEMO). As part of this programme, a review of the remote maintenance strategy considered maintenance solutions compatible with expected environmental conditions, whilst showing potential for meeting the plant availability targets. A key finding was that, for practical purposes, the expected radiation levels prohibit the use of complex remote handling operations to replace the first wall. In 2012/13, these remote maintenance activities were further extended, providing an insight into the requirements, constraints and challenges. In particular, the assessment of blanket and divertor maintenance, in light of the expected radiation conditions and availability, has elaborated the need for a very different approach from that of ITER. This activity has produced some very informative virtual reality simulations of the blanket segments and pipe removal that are exceptionally valuable in communicating the complexity and scale of the required operations. Through these simulations, estimates of the maintenance task durations have been possible demonstrating that a full replacement of the blankets within 6 months could be achieved. The design of the first wall, including the need to use sacrificial limiters must still be investigated. In support of the maintenance operations, a first indication of the requirements of an Active Maintenance Facility (AMF) has been elaborated.

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“…Semi-automated remote handling systems will be in charge of removing the in-vessel components (IVC) once their service life expires [16]. Breeding blanket segments correspond to the most massive and challenging IVC to be handled, being around 10 m tall, weighting up to 80 t, and having only 20 mm gaps between them-which in fact is less than the expected structural deformation under their own weight.…”

Section: Demo Remote Handling Systemsmentioning

confidence: 99%

“…After important engineering details are added to the model, the movements are defined, and the complete geometry and kinematics are evaluated in a Virtual Reality mock-up, as shown in Figure 7. 16.…”

Section: Preliminary Assessments and Problem Statementmentioning

confidence: 99%

On the application of meshfree methods to the nonlinear dynamics of multibody systems

Ibáñez¹

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Concept for a vertical maintenance remote handling system for multi module blanket segments in DEMO

Cited by 22 publications

References 2 publications

Conceptual Design of Temporally Storage Area in Hot Cell for Fusion DEMO Reactor

Conceptual Design of Temporally Storage Area in Hot Cell for Fusion DEMO Reactor

Pre-conceptual design assessment of DEMO remote maintenance

On the application of meshfree methods to the nonlinear dynamics of multibody systems

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