Ricerc@Sapienza

The present paper aims at assessing the carbon and energy footprint of an innovative process for carbon dioxide recycling, with flue gas as feedstock of nitrogen and carbon dioxide. Nitrogen is converted into ammonia through the Haber-Bosch process and carbon dioxide into methane via Sabatier reaction using hydrogen produced by renewable electricity excess.

Particle Therapy (PT) is a radiation therapy technique in which solid tumors are treated with charged ions and exploits the achievable highly localized dose delivery, allowing to spare healthy tissues and organs at risk. The development of a range monitoring technique to be used on-line, during the treatment, capable to reach millimetric precision is considered one of the important steps towards an optimization of the PT efficacy and of the treatment quality.

Scintillation mechanisms in gases offer the possibility of an optical readout of micropattern gas detectors. This approach takes advantage of the large progress achieved in last years in the performance of the photosensors, opening the way to the realization of high granularity and very sensitive particle trackers. In this paper, the features of a triple-GEM structure filled with a He/CF4 (60/40) mixture and readout by a CMOS sensor are described.

The MOnitor for Neutron Dose in hadrOntherapy (MONDO) project addresses the technical challenges posed by a neutron tracker detector aiming for a high detection efficiency and a good backtracking precision. The project aims to develop a tracking device capable of fully reconstructing the four momen- tum of fast and ultrafast secondary neutrons produced, e.g., in particle therapy (PT) treatments or in other physical processes.

Before the definitive shutdown of Phénix fast reactor, a pool-type sodium-cooled prototype, occurred in the year 2009, the French Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA) decided to carry out a final set of experimental tests, in order to gather data and additional knowledge on relevant Sodium Fast Reactors (SFR) operation and safety aspects. One of these experiments was the dissymmetrical configuration test, which has been selected as a benchmark transient on H2020 SESAME project.

Conceptual activities on the DEMO fusion power plant design are progressing in Europe under the lead of the EUROfusion Consortium. According to the current EU DEMO plant design, the Primary Heat Transfer System (PHTS) transfers heat from the nuclear heat sources, i.e. breeding blanket, divertor and (optionally) vacuum vessel, to the Power Conversion System (PCS) responsible for generating electric energy. To mitigate issues related to the pulsed DEMO operation, adding the Energy Storage System (ESS) filled with molten salt, between the PHTS and PCS, has been proposed.

Perturbation methods are part of the reactor physics foundation devoted to the study of fundamental
quantities used in design and safety analysis of nuclear reactors. In deterministic codes, such as
ERANOS, standard perturbation theory (SPT) and generalized perturbation theory (GPT) methods have
been historically developed and used. Monte Carlo codes, such as MCNP 6.1, can also perform, via adjoint
weighted tally, SPT calculations of reactivity worths. In this work a method, referred to as MC-GPT, is

Energy transition is often described as the shift from deterritorialised models developed in tandem with the rise of capitalism towards a paradigm based on small-scale infrastructures and short supply chains. In this new paradigm the local dimension is pivotal. This paper takes a self-reflective stance on situated research conducted with local communities in Italy, Indonesia and Australia.