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IFMIF-DONES (International Fusion Materials Irradiation Facility–DEMO Oriented Neutron Source) is currentlybeing developed in the frame of the EUROfusion Early Neutron Source work package (WPENS) and will be aninstallation for fusion material testing, that will generate aflux of neutrons of 1018m−2s−1with a broad peak at14 MeV by Li(d,xn) nuclear reactions thanks to a 40 MeV deuteron beam colliding on a liquid Liflow.The accelerator system is in charge of providing such high energy deuterons in order to produce the expectedneutronflux. The High Energy Beam Transport line (HEBT) is the last subsystem of the accelerator and its mainfunctions are to guide the deuteron beam towards the Lithium target and to shape it by the use of magneticelements to the reference beam footprint at the Lithium Target.The present work summarizes the current status of the HEBT design, including beam dynamics, vacuum,radioprotection, diagnostics and remote handling studies performed, along with the layout and integration of theline., This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 and 2019–2020 under grant agreement No 633053. The work done by IREC has been supported by the CERCA Programme from Generalitat de Catalunya (Government of Catalonia).

DEMOstration (DEMO)-oriented neutron source (DONES) will be an installation for fusion material testing, with a neutron flux of 14 MeV by Li(d, xn) nuclear reactions thanks to a deuteron beam colliding on a liquid Li flow. The expected neutron flux is in the order of 1018 m -2 ·s -1 to get irradiation conditions comparable to those on the first wall of a fusion reactor. The test systems will include specimens to be irradiated and later on tested in order to quantify the impact of nuclear damage on mechanical and physical properties. Such experiments will support the future design of DEMO (DEMO power plant based on a fusion reactor). The accelerator systems providing high energy deuterons will receive neutrons as well as gamma rays once the operation of the installation starts hence requiring remote handling (RH) for maintenance on certain components. Particularly a beam dump used for the commissioning phase and the scrapers protecting some high energy beam transport (HEBT) magnets, should be maintained and occasionally replaced by means of RH. The system devised for the RH operations is described together with the requirements imposed on the HEBT designers and Plant Systems designers such that the RH equipment can perform the maintenance in a reduced downtime.

The High Energy Beam Transport (HEBT) line components maintenance are to be conducted during twice yearly shutdown “beam off” periods, one 3-day shutdown and the main “beam off” shutdown period (annual preventive maintenance), which includes the necessary cooling and warming time, all totalling 20 days. Due to the radiation doses calculated and its subsequent radiation zone classification, technically challenging maintenance activities will need to be performed in the Accelerator Systems (AS) and particularly in the HEBT section located inside Target Interface Room (TIR). Thus, all HEBT components inside TIR must be designed to be maintained and replaced by Remote Handling (RH). In order to fulfil the RH requirements, a modularity approach intends to divide HEBT line section into independent large replacement units (LRUs), with localized interfaces. Splitting this section in three modules allows, first, the identification of faulty components more easily and secondly, reduces time needed for their replacement. In addition, the design of these modules has been performed to comply with beam dynamics, vacuum, building, RAMI and positioning requirements established for this section of the HEBT. As a result of the work done, the conclusions concerning the whole design process are summarized at the end of the paper.

The International Fusion Material Irradiation Facility-DEMO Oriented NEutron Source (IFMIF-DONES) is composed of numerous complex systems and components that need on-site maintenance. Such need requires Remote Handling (RH) operations with advanced technology that is capable of preventing exposure to radiation and complying with stringent plant requirements in hostile environments. Moreover, specific design and integration of the RH systems have to be carried out in order to properly comply with constraints and procedures for remote operations, which in most cases become an engineering challenge. This paper presents a RH methodology that covers all the necessary aspects for the entire rigorous implementation and execution of remote operation in IFMIF-DONES. The methodology is made up of a set of different stages, which are based on the initial cooperation among different teams involved in the remote operation cycle. This approach leads to an iterative process that allows optimization and improvement of remote operations. It aims at accelerating the process with safer and robust concept of maintenance, simplified procedures, minimized breakdowns and reduced cost and time., This work has been partially supported by “Technofusión(II) CM (P2013/MAE-2745). Moreover, this work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under grant agreement No. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

IFMIF-DONES aims at providing high-energy deuterons to produce a neutron flux to test materials. The accelerator stops the pulsed beam at a low duty cycle in the Beam Dump, which is a relevant component of the High Energy Beam Transport line. The cartridge of the Beam Dump absorbs a beam of charged particles during DONES accelerator commissioning and start-up phases after a shutdown. The cartridge is contained for security reasons in a shielding given its high activation, which remains for a long time. Deterioration of this component is due to heating cycles, radiation and corrosion caused by the cartridge cooling water. Thereby, Beam Dump has been classified as 3rd class Remote Handling component. It means that there is no scheduled maintenance for this component, but Remote Handling operations are required in case of failure. Remote equipment is mandatory when the Beam Dump shielding is open due to the high radiation levels. This work presents the maintenance operations to replace the Beam Dump cartridge. It includes the sequence and description of the procedures, equipment and tools necessary to meet the project requirements.

IFMIF-DONES (International Fusion Materials Irradiation Facility–DEMO Oriented Neutron Source) is currentlybeing developed in the frame of the EUROfusion Early Neutron Source work package (WPENS). It will be aninstallation for fusion material testing, that will generate aflux of neutrons of 1018m−2s−1with a broad peak at14 MeV by Li(d,xn) nuclear reactions thanks to a deuteron beam colliding on a liquid Liflow.The accelerator system is in charge of providing such high energy deuterons in order to produce the neutronflux expected. The objective of the Beam Dump, part of the High Energy Beam Transport Line (HEBT), is to stopthe pulsed beam at low duty cycle during DONES accelerator commissioning and start-up phases.The present work explains the radiological design of the beam dump shielding and two different configurationapproaches for the materialization of the design. The radiological design considers maintenance and operation,and it was done together with the building walls dimensioning so that the combined radiation attenuation by thelocal shield and the building leads to dose rates in the different rooms that satisfy the requirements. Activation ofthe materials in the HEBT line, originated by the leakage of neutrons through the beam dump entrance isevaluated and an ad-hoc solution is proposed for its minimization. Regarding the mechanical design, in thefirstconfiguration, the shielding is split into two halves horizontally, the upper-half requiring external lifting cap-abilities for its commission and maintenance. The second approach consists in a vertical splitting into two halves,which are self-moveable, avoiding the needs of external lifting capabilities for the remote handling of theshielding., This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 undergrant agreement No 633053. The views and opinions expressed hereindo not necessarily reflect those of the European Commission.The radiological design of the shield has been supported by the Spanish Government in the frame of the Broader Approach Agreement.The work done by IREC has been supported by the CERCA Programme from Generalitat de Catalunya (Government of Catalonia).

The progress of robotic technology in the last years paved the way for its application in the healthcare sector. In the light of demographic change and lack of nursing staff, telerobotic systems are a promising solution e.g. for homecare in rural areas or in quarantine stations to prevent dissemination of pathogens. This paper presents a user study investigating human performance when teleoperating a complex humanoid robot with an underactuated haptic interface. Twelve novices had to complete basic movement and contact tasks as well as more typical healthcare tasks like instrument handling and usage (pulse oximetry). Besides the general performance level we explored the effect of different force feedback architectures (with vs. without sensor-based force information) and of workspace scaling (1:1 vs. 1:2). The test subjects showed in the majority of tasks significantly best performance with the 3-Channel architecture and a scaling of 1:2.