DEMO Active Maintenance Facility concept progress 2012

Thomas, J.; Loving, A.; Crofts, Oliver; Morgan, Rod; Harman, Jon

doi:10.1016/j.fusengdes.2014.01.018

Cited by 10 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The neutron spectra tallies discussed above have been used in a sequence of detailed inventory simulations performed with the FISPACT-II [8] system using the EAF-2010 [12] neutronreaction cross section library and associated decay data. The material in each non-empty cell (the geometry contains many vacuum cells) of the geometry was irradiated according to the full 2-phase operation scenario envisaged for DEMO [13] under the neutron spectrum predicted for that cell. Specifically, this involved a 5.2 year phase-1 period of pulsed operation (modelled in FISPACT-II in the standard way as a continuous flux at 30% of full power), followed by a 1 year shutdown for a complete blanket and divertor replacement, and then a further 14.8 year pulsed operation in phase 2, which was split into three parts ('phases 2a-2c') with 8 month shutdown periods for additional divertor replacements in between.…”

Section: Inventory Simulations and Processingmentioning

confidence: 99%

Activation, decay heat, and waste classification studies of the European DEMO concept

Gilbert

Eade

Bachmann³

et al. 2017

Nucl. Fusion

View full text Add to dashboard Cite

show abstract

Section: Inventory Simulations and Processingmentioning

confidence: 99%

Activation, decay heat, and waste classification studies of the European DEMO concept

Gilbert

Eade

Bachmann³

et al. 2017

Nucl. Fusion

View full text Add to dashboard Cite

show abstract

“…The concept is for an extensive facility at 737,000m 3 that is able to meet the operational demands of the maintenance program [17]. It is necessary for the AMF to provide adequate component storage areas to cope with one full set of activated components and one replacement set.…”

Section: Active Maintenance Facilitymentioning

confidence: 99%

“…The Active Maintenance Facility (AMF), see figure 4, has been developed to support the VMS as described in § 4. The concept is for an extensive facility at 737,000m 3 that is able to meet the operational demands of the maintenance program [17] 16 divertor maintenance ports vessel components will require active cooling for a period of up to 18 months. This allows the decay heating to reduce so that the components have a stable temperature of ~50°C without additional cooling.…”

Section: Active Maintenance Facilitymentioning

confidence: 99%

Pre-conceptual design assessment of DEMO remote maintenance

Loving

Crofts

Sykes

et al. 2014

Fusion Engineering and Design

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…A range of casks are docked to the bio-shield and vessel ports at the upper port and at the divertor port to deploy remote handling systems and to deliver and remove components. During remote maintenance operations, the Active Maintenance Facility [4] supplies and receives casks containing remote handling equipment and components from a buffer store.…”

Section: Remote Maintenancementioning

confidence: 99%

Maintenance duration estimate for a DEMO fusion power plant, based on the EFDA WP12 pre-conceptual studies

Crofts

Harman

2014

Fusion Engineering and Design

View full text Add to dashboard Cite

The erosion and high neutron flux in a fusion power plant results in the need for frequent remote replacement of the plasma facing components. This is a complex and time consuming remote handling operation and its duration directly affects the availability and therefore the commercial viability of the power plant.A tool is needed to allow the maintenance duration to be determined so that developments in component design can be assessed in terms of their effect on the maintenance duration. This allows the correct balance to be drawn between component cost and performance on the one hand and the remote handling cost and plant availability on the other.The work to develop this tool has begun with an estimate of the maintenance duration for a fusion power plant based on the EFDA DEMO WP12 pre-conceptual design studies [1]. The estimate can be readily adjusted for changes to the remote maintenance process resulting from design changes. The estimate uses data extrapolated from recorded times and operational experience from remote maintenance activities on the JET tokamak and other nuclear facilities.The Power Plant Conceptual Study from 2005 [2] proposes that commercial viability of a power plant would require an availability of 75% or above. Results from the maintenance estimate described in this paper suggest that this level of availability could be achieved for the planned maintenance using a highly developed and tested remote maintenance system, with a large element of parallel working and challenging but feasible operation times.

show abstract

DEMO Active Maintenance Facility concept progress 2012

Cited by 10 publications

References 1 publication

Activation, decay heat, and waste classification studies of the European DEMO concept

Activation, decay heat, and waste classification studies of the European DEMO concept

Pre-conceptual design assessment of DEMO remote maintenance

Maintenance duration estimate for a DEMO fusion power plant, based on the EFDA WP12 pre-conceptual studies

Contact Info

Product

Resources

About