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News from ETSON and its members*

22 Jul 2021 | Bel V

For many years, even decades, there have been endless discussions on what values to use when performing clearance based on surface specific measurements. The definition of contamination in the Transport Regulation by IAEA and an old study by Fairbairn, gave rise to the numbers 0.04 Bq/cm2 for radiotoxic alpha-emitters and 0.4 Bq/cm2 for beta/gamma emitters. These values are widely used, but also often contested and challenged. Only a thorough, comprehensive study on the derivation of nuclide specific surface clearance levels can give a founded answer to the raised issues.

22 Jul 2021 | Bel V

Historically, the first fire protection regulations to be implemented could be described as prescriptive (or deterministic), where the performance requirements of fire protection equipment are fixed. An example of such requirement is the need to segregate Structures, Systems & Components (SSCs) important for safety with fire-rated barriers ensuring standard resistance to fire propagation between compartments (e.g. for 3 hours according to U.S. NRC regulations). Such ratings are based on standardized testing procedures (ASTM, NFPA, EN...) performed under defined conditions (like the ISO 834 time-temperature curve).

22 Jul 2021 | ETSON

The consequences of the radiological and nuclear emergencies may vary from an overexposure of a single person to a transboundary catastrophe with multiple victims and massive radiation contamination. In light of the effort and resources potentially involved in the mitigation, assessment of the radiological consequences during an emergency is a vital stage in the planning and response.

22 Jun 2021 | VTT

In February 2020, a project was launched at VTT to develop a nuclear district heating plant for the Finnish market. The developed technology is called the Low-Temperature District Heating and Desalination Rector, or LDR.

22 Jun 2021 | VTT

Finland has two ongoing national research programmes in the nuclear sector: KYT2022 and SAFIR2022. The two research programmes held a joint Interim Seminar in March.

22 Jun 2021 | VTT

The reactor water level measurement became unreliable during the Fukushima accident. VTT has analyzed the behavior of the measurement system at unit 2.

22 Jun 2021 | RATEN ICN

ALFRED infrastructure was designed as a Research Infrastructure of global relevance on the HLM and LFR technology.

22 Jun 2021 | RATEN ICN

Different concepts for nuclear heavy water reactors fuel bundles were compared and analysed from the thermo-mechanical point of view by using specific computer codes.

22 Jun 2021 | EK CER

Centre for Energy Research (EK) in Budapest, Hungary was designated as the first Collaborating Centre in Nuclear Forensics of the IAEA in 2016 which was prolonged this year till 2025. The Centre provides laboratory, research and training capacity, expertise, and mentoring opportunities together with scientific collaborations in the field of nuclear security.

17 May 2021 | JSI

Accurate prediction of the convective single- and two-phase heat transfer is very important in process and power engineering for safety, reliability, and efficiency. In this aspect, boiling is particularly interesting and complex phenomena, which may significantly enhance the heat transfer from the heated surface to the coolant flow. The detailed understanding of these phenomena is of great importance and, as such, is put under investigation in the THELMA laboratory (Thermal-Hydraulics Experimental Laboratory for Multiphase Applications) at the Reactor Engineering Division at Jožef Stefan Institute (Slovenia).

 

 

* The responsibility for the content of news provided by ETSON member organisation lies solely with the respective ETSON member. The views and opinions expressed in news content provided by ETSON member organisations do not necessarily reflect those of ETSON.

 

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