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Opportunities

Post-Doc position in thermal hydraulics at IRSN

A post-doctoral position has been opened at IRSN to realize experimental campaigns for GO-VIKING WP4.

GO-VIKING is a European Commission funded project that kicked off in June 2022. (Project website is under construction)

 

The experimental device, on which the work will focus, is called TREFLE and allows to realize two phase air-water cross-flows inside a tube bundle, and to study the fluid-structure interaction.

 

The post-doc is meant to start at the beginning of 2023, but any starting date from now can be possible.

The full description can be found HERE

Subject: thermal-hydraulics
Keywords: two-phase flows, fluid-structure interactions, experimental measurements, steam generators
Place: Cadarache – France (13)
Length: 18 months
Availability date: 01 February 2023 (different starting date – sooner or later – possible, depending on the candidate availability)
Supervisors: Daniele VIVALDI and Guillaume BRILLANT

CONTEXT

Fluid-structure interactions (FSI) are a concern in nuclear power plants. One main example is the fluid-induced vibrations (FIV) of the steam generator (SG) tube bundle. The external steam-water two-phase flow crossing the tubes induces FSI mechanisms that, if not mastered, can lead to high amplitudes of vibration, which can result in a SG tube rupture accident.

The Gathering expertise On Vibration ImpaKt In Nuclear power Generation (GO-VIKING) European project, starting in 2022, aims at increasing the expertise and at improving the tools and skills of the European nuclear stakeholders for the analysis of complex FIV phenomena, in order to maintain and enhance nuclear plant safety. The scope of work package (WP) 4 of GO-VIKING is the generation of high-quality experimental data for FIV in multiphase flows in fuel assemblies and SGs, with the aim of providing a deeper understanding of these complex phenomena and using this data to improve medium-resolution models for two-phase FIV.

In the frame of WP4 of GO-VIKING, IRSN – Institut de Radioprotection et de Sûreté Nucléaire – proposes the generation of two-phase experimental data inside a SG relevant tube bundle configuration. To achieve this, IRSN developed the experimental device TREFLE [1], located at IRSN in Cadarache. TREFLE allows to realize air-water cross-flows inside a square-pitch 5×5 straight tube bundle. The device is highly instrumented for two-phase flow measurements: optical probes to measure local void fractions and velocities, Wire Mesh Sensor to measure 2D void fraction distributions and high-speed camera to study the flow dynamics. Besides, TREFLE allows to measure the vibration response of the central tube of the tube bundle thanks to accelerometers. A sketch of TREFLE is presented in Fig. 1. Fig. 2 shows some pictures of the two-phase flow generated and observed inside TREFLE.
The experimental data generated with TREFLE will be shared with all GO-VIKING participants, and will be used as reference data for numerical simulation result validation: the experimental tests will be simulated through different multiphase CFD tools by some participants of WP4 (Nuclear Research and consultancy Group (NRG), Teknologian tutkimuskeskus VTT Oy (VTT), Commissariat à l’énergie atomique et aux énergies alternatives (CEA), EDF Energy R&D UK Centre Limited (EDF-E)).

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Opportunities, Proposed PhD Topics

Call for Young Researcher – PhD Candidates – JSI, Slovenia

The Reactor Engineering Division of the Jožef Stefan Institute (Ljubljana, Slovenia) is searching for PhD candidates for young researcher positions on the topics of computational fluid dynamics and structural mechanics.

Potential PhD research topics:

– Heat transfer for the forced-convection film boiling conditions

– Material damage under fluid-induced loads

– Flow boiling at high heat fluxes

– Simulations of turbulent stratified flows

The deadline for application is July 31, 2022.

More information on the potential research topics is here.

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Opportunities, Proposed PhD Topics

PhD position: “Quantification of radiocarbon in waste materials from nuclear decommissioning”

Call CLOSED

Background: JRC is developing/optimizing methods for the analysis of the safety performance of a repository, through the investigation of materials and radionuclides relevant to the safety of a repository, or for the radiotoxicity of 14C.
After an initial period in which the student will receive general instructions on the mission of the JRC and in particular the role of the EURATOM activities carried out on the Karlsruhe site in the field of nuclear fission, his/her research activity on carbon-14 concentration determination using SCAR will start.

Activities will be focused on the following main tasks:

  • Analysis and optimization of the optical setup in terms of laser beam;
  • Development, characterisation and optimisation of carbon extraction and oxidation systems.
  • Experimental campaign on graphite samples with different activation levels. Those samples are real decommissioning ones and thus very relevant for the mission of the JRC.
  • Investigation and characterization of other samples, such as activated reactor structural material, irradiated cladding and spent nuclear fuel.

 

Timeframe of the PhD research in the Unit

The duration of the PhD project will be three years. The PhD will spend approximately two years at JRC and 1 year in total at UniPi.

 

Expected outputs of the PhD research/thesis

The expected output of the PhD project will be:

  • optimization of the optical setup in terms of laser beam– resonance cavity coupling and stability of its locking;
  • optimization of the CO2 extraction procedure including the development of an automatic system to interface the carbon extraction system to the CO2 cryogenic trap;
  • validation and (possibly) certification of techniques used for the investigation of materials and radionuclides relevant for the safety of a repository, or for the radiotoxicity of 14C for which there is no consolidated procedure in literature.

Expected results of the collaboration

The project will increase the analytical capabilities of both the HEI and JRC laboratories, lead to a strong improvement in the knowledge of tools and methods used/to use for the quantification of radiocarbon in waste materials from nuclear decommissioning.
The research work will positively impact on the activities dedicated to nuclear decommissioning at both JRC and DICI.
Globally the project will enhance the collaboration between the two Parties and might produce increased knowledge in analytical and experimental techniques for nuclear decommissioning with potential benefits for the entire European system.

Contact Person: professor Rosa Lo Frano rosa.lo.frano@unipi.it

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Opportunities

Job Opportunities at CERN, Geneva

 CLOSED

 

 

Assistant de l’Officier à la planification budgétaire [DPO]
(Contrat de travail temporaire auprès d’une agence genevoise)

Descriptif du poste proposé:
En tant qu’assistant(e) de l’officier à la planification budgétaire et personnelle de l’unité (DPO):
– vous aurez en charge différents exercices de suivi et de mise à jour de la planification budgétaire tout au long de l’année, à l’aide d’un outil en ligne de planification budgétaire (personnel + matériel) ainsi que la gestion des codes budgétaires associés;
– vous serez responsable de vérifier la cohérence des achats de l’Unité selon le prévisionnel budgétaire;
– vous répondrez aux sollicitations budgétaires de la ligne hiérarchique pour répondre à leur besoin et leur faciliter l’accès aux données;
– vous collecterez, traiterez les différentes informations obtenues durant les exercices budgétaires pour préparer les documents budgétaires servant de support au DPO;
– vous assurerez le suivi administratif de l’élaboration des documents destinés aux instances de gouvernance du CERN, en ce qui concerne les chapitres à écrire par
l’Unité HSE;
– vous travaillerez en étroite collaboration avec l’officier départemental administratif de l’unité dans le cadre de la mise à jour budgétaire des contrats des membres du
personnel associé;
– vous communiquerez avec les différents services de l’unité à chaque exercice (mails en français et en anglais, réunions en présentiel, visio, téléphones);
– Enfin, vous participerez aux études de marché lors de la création de nouveaux contrats et suivrez l’évolution des contrats de services au sein de l’unité.

 

Profil recherché:
– Ingénieur Junior généraliste attiré par la gestion de projet / management, contrôleur de gestion;
– Compétences et connaissances démontrées dans l’utilisation d’outils du pack office (Word, Excel, Outlook, …)
– Flexible, capable de communiquer efficacement, de travailler en groupe et de s’adapter facilement à une équipe, organisé, rigoureux, méticuleux, méthodique et avec le sens
du détail, respect des règles de confidentialité.
– Langues: niveau C1 dans les des deux langues officielles du CERN (anglais et français)

Contrat : Contrat de travail temporaire auprès d’une agence genevoise (12 mois), à pourvoir immédiatement.
Contact :
Yann DONJOUX,  yann.donjoux@cern.ch / +41227671871

 

Job description, available for download, HERE

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Opportunities

Job Opportunity at IAEA, Vienna

IAEA is looking for:

Nuclear Security Officer (Radiological Crime Scene Management)

Organization: NSNS-Crime Scene Management and Nuclear Forensics Unit

Primary Location: Austria-Vienna-Vienna-IAEA Headquarters

Closing Date: 2022-07-06, 11:59:00 PM

Duration in Months: 24
Contract Type: Fixed Term – Extrabudgetary
Probation Period: 1 Year
 

Job Description and more details available HERE

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Opportunities

Job Opportunities at WESTINGHOUSE in BELGIUM

Systems and Safety Analysis Engineer

JOB SPECIFICATIONS AND DUTIES

  • Member of the Systems and Safety Analysis group performing engineering evaluations and analyses of technical products and services to support operation of the nuclear power plants in the nuclear safety and performance field.
  • Perform a variety of engineering tasks in support to operation of nuclear power plants (preparation of inputs to run thermo-hydraulic codes for transient analyses, preparation of fluid systems calculations for systems sizing or performances, calculation of setpoints for nuclear power plants operation, control systems studies, etc…).
  • Coaching by experienced engineers.
  • Shall be developed to be proficient in thermo-hydraulic calculations for transient analyses and for systems evaluations.
  • Thorough documentation of analyses.
  • Propose solutions to technical challenges that may arise during projects.
  • Participate in the preparation of licensing documentation.
  • Participate in integrated and international project teams and communicate to involved parties.
  • Occasionally travel to customer sites or to Industry Group Workshops (to gather or present technical information).

TECHNICAL/ACADEMIC QUALIFICATIONS AND EXPERIENCE REQUIRED

  • Masters degree in Mechanical or Physics engineering; Energy Engineering or Nuclear Engineering an asset
  • Ability to apply fundamental engineering principles (including fluid mechanics and thermodynamics).
  • Strong technical interest, predisposition for multi-tasking, flexibility, understanding of project priorities and teamwork abilities required.
  • Fluent in English with proven reporting skills
  • Ideally also able to communicate in French

LINK TO APPLY: HERE

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Opportunities, Proposed PhD Topics

PhD Thesis in Molten Salt Reactor Physics

The subject of the PhD thesis proposed here will contribute to the definition of the outline in collaboration with the different partners of the consortium, via the neutronic studies of the ARAMIS reactor. The thesis will focus on the calculation of the core and cycle performances, on the sensitivities to nuclear data, as well as on the study of the residual power. Other studies may be undertaken by the PhD student, depending on the progress of the thesis and of the ISAC project, particularly in connection with safety studies: core behavior in accident situations, participation in risk analysis in collaboration with EDF and Framatome. The thesis, which will be supported by the two laboratories LPSC and SUBATECH, will be carried out 50% in Nantes at SUBATECH and 50% in Grenoble at LPSC.

The full description can be found HERE

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Opportunities

Job Opportunities at WESTINGHOUSE

Westinghouse is looking for several profiles:

  1. Senior Engineer based in Madrid –> download the PDF HERE
JOB SPECIFICATIONS AND DUTIES
  • Member of the Systems and Safety Analysis group performing engineering evaluations and analyses of technical products and services to support operation of the nuclear power plants in the nuclear safety and performance field.
  • Perform a variety of engineering tasks in support to operation of nuclear power plants (preparation of inputs to run thermo-hydraulic codes for transient analyses, preparation of fluid systems calculations for systems sizing or performances, calculation of setpoints for nuclear power plants operation and evaluation of emergency operation procedures changes, control systems studies, etc…).
  • Shall be developed to be proficient in thermo-hydraulic calculations for transient analyses and for systems evaluations.
  • Assessment capability of dose calculations and radiological consequences of accidents.
  • Experience running codes for safety analyses purposes.
  • Thorough documentation of analyses.
  • Propose solutions to technical challenges that may arise during projects.
  • Participate in the preparation of licensing documentation.
  • Participate to integrated and international project teams and communicate to involved parties.
  • Occasionally travel to customer sites or to Industry Group Workshops (to gather or present technical information).
  • Knowledge of the Spanish nuclear regulatory body and specific regulations is an asset.

2. Junior Waste Management Engineer  based in Madrid –> download the PDF HERE

Tasks:
  • Definition of waste acceptance criteria and complementary procedures and technical specifications
  • Waste packages activity calculations for Low and Intermediate Level Waste, Very Low Level Waste, storage units, large dimensions waste like equipment and components and singular waste
  • Activity calculations and verifications of the coherence activity-dose rate with Microshield code
  • Calculation and definition of the scaling factors and activity concentrations from the sampling activity results and statistical techniques and applications
  • Radionuclide vectors calculation and validation
  • Preparation of engineering documents (calculation reports, descriptions, licensing documents, and specifications)
  • Carrying out production control of waste generation in the Nuclear Power Plants (Quality Assurance process)
  • Participation in preparation of proposals (technical descriptions, calculation of efforts)
  • Working in international teams
  • Travelling and onsite activities (worldwide)

3. Radiation Protection Officer –> download the PDF HERE

En qualité d’Agent de Sécurité Radioprotection, vous effectuez les mesures de rayonnement et de contamination en vue d’assurer la protection des personnes et de l’environnement.

Vous avez la responsabilité de la bonne réalisation du contrôle des transports de matières radioactives et vous exécutez les tâches administratives et de logistique en rapport avec la fonction.

Garant du bon respect du principe ALARA, vous donnez les consignes aux intervenants pour se protéger efficacement face au risque de contamination.

 

4. Design Engineer –> download PDF HERE

Job Responsibilities:

As a Design Engineer you will:

  • Perform functional design, implementation, testing and site commissioning of control logic in Ovation Platform and Westinghouse Internal Design Development Tools;
  • Develop Complex Nuclear Mathematical Applications
  • Review Customer specifications and own the development of detailed technical documentation related to the design of the instrumentation and control systems;
  • Implement standard instrumentation and control design solutions for Westinghouse internal projects;
  • Revise and update technical project documentation based on design updates and Customer comments as necessary;
  • Participate in technical meeting with Project lead and internal and external customers to understand requirement/scope of work/schedule and Quality requirements;
  • Provide system warranty & post-warranty maintenance at Customer sites;
  • Ensure accuracy and completeness of assigned tasks.

CONTACT PERSON FOR FURTHER INFORMATION:  Mr. Mathieu MERLE, mathieu.merle@westinghouse.com

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Opportunities, Proposed PhD Topics

Open PhD position in experimental nuclear physics

A collaboration team of the IFIC Valencia (Spain) and Subatech (France) is offering a PhD position under the topic “Study of exotic nuclei interesting for applied and fundamental nuclear physics with Total Absorption Gamma Spectroscopy (TAGS)”.

The collaboration has two proposals accepted at the the JYFL facility (Jyväskÿla-Finland) for the measurements of nuclei interesting for applied and fundamental physics.

One of these experiments should be done in 2022. The selected candidate will participate to the preparation of the detector, the experiment and to the following data analysis. This analysis will allow to compute the beta feeding distribution and to deduce the subsequent beta strength toward the daughter nucleus, for each studied nucleus.

The fellowship is funded by the SANDA European Project and the student will work in both IFIC and Subatech laboratories.

Applications should be send before 1st of June 2022. The PhD will start around September 2022.

The full description can be found HERE