The possible innovative methods of maneuvering are investigated on the example NPP Hanhikivi with WWER-1200 reactor in a frame AES-2006 project. Stationary fuel loading analysis was performed for most significant graph daily manoeuvring (100-50-100)% Nnom rate power change 1-5 % per minute, that European Utility Requirements. improvement is ensured by maintaining constant average coolant temper...

Localizing safety systems are provided to contain radioactive substances in an accident and attenuate ionizing radiation at a modern nuclear power plant. Together with substances, hydrogen is also retained, which formed during the decomposition of primary coolant. The accumulation presence oxygen from atmosphere localization zone carries danger formation flammable explosive concentrations these...

As part of the reactor dynamics activities of FZK/IRS, the qualification of a detailed 3D CFD model of a reactor pressure vessel is a key step in safety evaluations for improving predictive capabilities and acceptability of commercial CFD tools in reactor physics. The VVER-1000 Coolant Transient Benchmark, initiated by OECD, represents an excellent opportunity for validation. In this work a CFD...

Monitorovanie a únik testovanej WWER – 440 látky namočenej do vyčerpaného paliva zo skladu sústredenom na Slovensku An accelerated monitoring system designed for the Slovak wet interim spent fuel storage facility in NPP Jaslovské Bohunice bases on the newly designed “cesium detectors” is presented in the paper. Since 1999, leak tests of WWER-440 fuel assemblies are provided by a special leak ti...

Automatic estimation of word significance oriented for speech-based Information Retrieval (IR) is addressed. Since the significance of words differs in IR, automatic speech recognition (ASR) performance has been evaluated based on weighted word error rate (WWER), which gives a weight on errors from the viewpoint of IR, instead of word error rate (WER), which treats all words uniformly. A decodi...

Since 1945 Canada has had a nuclear power industry based on reactor design which uses natural uranium and heavy water. The tortuous and improbable sequence of events which led to this situation is examined.