MYRRHA (Multipurpose hYbrid Research Reactor for High-tec Applications) is a unique highly innovative prototype of a nuclear reactor driven by a high power linear accelerator. It will be designed to operate in both critical (no accelerator needed) and subcritical mode. MYRRHA has a fast spectrum core cooled by Lead Bismuth Eutectic (LBE).

The recent stress corrosion cracking (SCC) in Alloy 182 in reactor pressure vessel nozzles, reactor internal attachment or penetrations dissimilar metal welds in boiling water reactors (BWRs) represent a serious potential safety concern.

Russian federal nuclear safety rules and regulations ‘Basic Safety Provisions for Nuclear Power Plants’ (NP-001-15) establish a requirement to complement the safety analysis for a nuclear power plant with estimation of errors and uncertainties in the obtained results.

A leak suspected to have been caused by high cycle thermal fatigue due to fluctuating axial motion of a swirl penetration front end has been detected in early 2018 in a non-isolable Reactor Coolant System branch at the Doel 1 Nuclear Power Plant (Belgium).

Similar to the situation with other human activities, the coronavirus pandemic has put to test the regulator ability to adapt and retain effective performance under extreme conditions. 

In recent years, there has been a growing interest across the world in the designs of small nuclear power plants (SNPP) with small reactors of various types. 

The Exercise Evaluation software was developed by the SEC NRS to render the scientific and technical support to the Information and Analytical Centre of Rostechnadzor (Rostechnadzor IAC) – the Russian state safety regulation authority in the field of atomic energy. 

The small modular nuclear power reactors under development represent a new way of thinking about nuclear energy. 

In autumn 2019 VTT launched the multi-year domestic project “dECOmm: Finnish Ecosystem for New International Decommissioning Services” bringing together Finnish expertise that will prove useful in the forthcoming effort to decommission nuclear power plants both in Finland and abroad. 

The objective of the Finnish Research Programme on Nuclear Power Plant Safety 2019-2022 (SAFIR2022) is to ensure that should new matters related to the safe use of nuclear power plants arise, the authorities possess sufficient technical expertise and other competence required for rapidly determining the significance of the matters.

Coordinated public research programmes on nuclear waste management have been active in Finland since 1989. 

VTT continues to support Finland progressing towards having the first-in-the-world licenced deep geological repository for spent nuclear fuel. 

In a recent virtual workshop of the European Technical Safety Organisations Network (ETSON), nuclear safety experts of the network´s member organisations explored the consequences of the current Covid-19 pandemic for nuclear safety and discussed respective countermeasures.

PERSEO is a full scale facility aimed at studying a new passive decay heat removal system operating in natural circulation.

Unexpected methane and CO₂ releases from the ground and noble and conventional gases in groundwater could be favored by stress produced by geological and seismic phenomena.