Simulation of rod ejection accident byPARCS code

This paper describes reactor core model used for simulating REA. The model was designed in PARCS utilizing graphical interface SNAP. The data for model were given from benchmark NEACPR L-335. The PARCS model used integrated thermal hydraulic block for calculation. The results and solution is shown in the paper. Thermal hydraulic calculation can also be provided by external system code TRACE. The PARCS model is prepared to couple with TRACE model for giving more accurate calculation

La renovació del paisatgisme en els nous parcs metropolitans

Enric Batlle tracta el salt d'escala en els projectes de parcs en àmbits metropolitans, uns projectes paisatgístics que pretenen donar respostes a unes funcions territorials que sobrepassen els límits municipals. L'autor fa un recorregut que mostra diverses estratègies projectuals adaptades a les dimensions i característiques del lloc -des dels parcs urbans de caràcter municipal als sistemes de parcs metropolitans- passant pel que denomina entorns amb valor afegit

Development of an Analytic Nodal Diffusion Solver in Multigroups for 3D Reactor Cores with Rectangular or Hexagonal Assemblies.

More accurate modelling of physical phenomena involved in present and future nuclear reactors requires a multi-scale and multi-physics approach. This challenge can be accomplished by the coupling of best-estimate core-physics, thermal-hydraulics and multi-physics solvers. In order to make viable that coupling, the current trends in reactor simulations are along the development of a new generation of tools based on user-friendly, modular, easily linkable, faster and more accurate codes to be integrated in common platforms. These premises are in the origin of the NURESIM Integrated Project within the 6th European Framework Program, which is envisaged to provide the initial step towards a Common European Standard Software Platform for nuclear reactors simulations. In the frame of this project and to reach the above-mentioned goals, a 3-D multigroup nodal solver for neutron diffusion calculations called ANDES (Analytic Nodal Diffusion Equation Solver) has been developed and tested in-depth in this Thesis. ANDES solves the steady-state and time-dependent neutron diffusion equation in threedimensions and any number of energy groups, utilizing the Analytic Coarse-Mesh Finite-Difference (ACMFD) scheme to yield the nodal coupling equations. It can be applied to both Cartesian and triangular-Z geometries, so that simulations of LWR as well as VVER, HTR and fast reactors can be performed. The solver has been implemented in a fully encapsulated way, enabling it as a module to be readily integrated in other codes and platforms. In fact, it can be used either as a stand-alone nodal code or as a solver to accelerate the convergence of whole core pin-by-pin code systems. Verification of performance has shown that ANDES is a code with high order definition for whole core realistic nodal simulations. In this paper, the methodology developed and involved in ANDES is presented

Feasibility of Implementing Community Partnerships to Provide Diabetes Prevention Services to Youth

Type 2 diabetes (T2D) in youth has increased as a result of the obesity epidemic. Diabetes prevention programming is needed for youth, at risk for T2D, and their families. However, there is a lack of diabetes prevention services for this population. There is evidence for the benefit of lifestyle modification for decreasing diabetes risk, however there are barriers for youth to access these services in a traditional clinical setting. Our Youth Diabetes Prevention Clinic (YDPC) created partnerships within the community to increase access to diabetes prevention services for at risk youth. YDPC personnel approached community organizations who had the expertise and capacity to partner in needed areas. These partnerships allowed for the development and facilitation of a community-based diabetes prevention group. Youth and their families participated in a 12 week diabetes prevention group. We measured attendance and participant satisfaction with the program. Families attended an average of 5.1 sessions from January to October 2016. Participant satisfaction was collected five times. Physical activity was rated as “awesome” or “good” by 88% of the respondents. The nutrition activities were rated as “awesome” or “good” by 97% of respondents. Physicians and families express a desire for diabetes prevention services, however barriers make it difficult for families to fully participate. Creating partnerships within the community allows for increased access to diabetes prevention services for high-risk, underserved families

A Comparison of Ideas in the Development and Governance of National Parks and Protected Areas in the US and Canada

This paper uses a comparison of ideas in US and Canadian national parks history and governance to explain the rationale for the development of national parks and protected areas. Comparisons of the Canadian and US national parks history have either noted few significant differences, or have argued that there has been far less emphasis on preservation in Canadian parks governance. This paper uses two main axes to compare ideas about parks governance in the US and Canada: the first involves the discursive and cultural justification for restricting development; and the second is the degree of governmental leadership and conscious planning, or statism, that goes into parks governance. A survey of the respective histories of parks governance leads to the conclusion that differences between the US and Canada in parks governance exist. Nevertheless, these are largely a result of the historical interaction and relationship between the two countries, rather than inherent cultural differences or similarities in notions of "wilderness." Conclusions centre on the effects of the tendency for Canadian patterns of economic development to produce greater path dependency and hence to restrict resistance to economic development within parks.Ce document compare des idées sur l’istoire et la gouvernance des parcs nationaux aux États-Unis et au Canada pour expliquer la raison d’être de la création de parcs nationaux et d’aires protégées. Les comparaisons de l’histoire des parcs nationaux canadiens et américains ont révélé peu de différences importantes, sauf peut-être qu’on met beaucoup moins l’accent sur la préservation dans les parcs canadiens. Ce document utilise deux axes principaux pour comparer des idées sur la gouvernance des parcs aux Etats-Unis et au Canada : le premier comprend la justification discursive et culturelle de la restriction du développement et l’autre est le degré de leadership gouvernemental et de planification consciente, ou l’étatisme, dans la gouvernance des parcs. Un sondage sur les histoires respectives de la gouvernance des parcs mène à la conclusion qu’il existe des différences entre les États-Unis et le Canada en matière de gouvernance des parcs. Néanmoins, elles résultent en grande partie de l’interaction et des relations historiques entre les deux pays plutôt que des différences ou des ressemblances culturelles inhérentes concernant la notion de « milieu sauvage ». Les conclusions portent sur les effets de la tendance des modèles canadiens de développement économique à suivre d’avantage les voies déjà établies et, par conséquent, à restreindre la résistance au développement économique dans les parcs

Code improvement and model validation for Asco-II Nuclear Power Plant model using a coupled 3D neutron kinetics/thermal-hydraulic code

This paper provides a Best Estimate validation calculation with a coupled thermal–hydraulic and 3D neutron kinetic model for Ascó-II Nuclear Power Plant. Common NRC codes have been used for its purpose. TRACE is the code used for the thermal–hydraulic system calculations; PARCS is the code used for the 3D neutron kinetics calculations. Cross section calculations were performed with the HELIOS lattice physics code, finally GenPMAXS was used to convert the cross section into the PARCS format. A simplified three dimensional 3D neutronics model of the Ascó II NPP is used as a core kinetics model. A 3D cylindrical thermal–hydraulic vessel plus 1D representation of the remainder of the full plant model is used as the thermal–hydraulic model. The transient selected to ensure the model validation is an actual 50% Loss of Load. This transient is characterized by space–time effects and was used to validate different thermal–hydraulic system models for the GET university group in the past. The scenario is also good to ensure the validation of a coupled 3D neutron kinetics code since it provides a transient situation between two stable regions at 100% and 50%. From the current code versions used, some source code modifications have been carried out in order to ensure the correct feedback between thermal–hydraulic and neutron kinetics code. In that sense, a dynamic control rod movement between TRACE and PARCS has been implemented. This is a complete control rod position feedback during transient scenarios. After all the work was performed, the important TH and NK time trend parameters were compared to the plant data and the comparison was reasonable with some discrepancy, thus the developed system models and the code modifications are robust enough to be used for future safety analysis. New coupled code capability has been tested and found as a required capability, when validating 3D NK–TH coupled calculations.Peer ReviewedPostprint (published version

Comment gérer des expériences extraordinaires ? Analyse et recommandations à partir d'une immersion dans les parcs à thème

International audienceThe designers and managers of amusement parks seek above all to encourage the visitor's immersion in the heart of an extraordinary experience. Yet access to this type of experience is not systematic and the visitor's immersion does not seem permanent. The aim of this paper is to deepen understanding of the park experience. The analysis of 41 introspective diaries of visitors to amusement parks identifes states of immersion but also other states submersion, emersion, reject). On a managerial plan, this approach offers understanding keys to theme park managers on experiences related to this offer.Les concepteurs et managers de parcs de loisirs cherchent avant tout à favoriser l'immersion du visiteur au coeur d'une expérience extraordinaire. Pourtant l'accès à ce type d'expérience n'est pas systématique et l'immersion du visiteur ne semble pas permanente. L'objectif de cet article est d'approfondir la compréhension de l'expérience vécue dans les parcs de loisirs. L'analyse de 41 journaux de bord de visiteurs de parcs d'attraction permet de mettre à jour des états d'immersion mais également d'autres états ressentis (submersion, émersion, rejet). Sur le plan managérial, cette démarche offre des clés de compréhension aux managers de parcs à thèmes sur le vécu lié à ce type d'offre

Les enjeux de l’environnement industriel en France dans les années 1960 : les industriels face à la naissance d’une politique

International audience[Premières lignes] De différentes manières, les années 1960 ont été des années fondatrices dans le domaine de la politique appliquée en France en matière d’environnement. On le sait généralement pour certains sujets (parcs nationaux, parcs naturels régionaux par exemple); on le sait parfois moins à propos de questions touchant aux problèmes d’environnement industriel..