The Monte Carlo calculation of the effective (i.e. adjoint weighted) neutron generation time Keff, especially for continuous energy simulations, is not straightforward nor standard in Monte Carlo codes. The use of the non-adjoint weighted neutron generation time K (standard in most Monte Carlo codes) as an approximation of the effective one can lead to a serious bias. We show here that the diff...

Nanofluids are engineered colloidal suspensions of nanoparticles in water, and exhibit a very significant enhancement (up to 200%) of the boiling Critical Heat Flux (CHF) at modest nanoparticle concentrations (50.1% by volume). Since CHF is the upper limit of nucleate boiling, such enhancement offers the potential for major performance improvement in many practical applications that use nucleat...

Five Euratom projects launched since 2017 in support of the development ESNII/Generation-IV reactor systems are briefly presented paper terms key objectives, results, and recommendations for future. These focus on various aspects following systems: Sodium Fast Reactor, Gas Cooled Supercritical Water Molten Salt Reactor. The does not consider EU focused Gen-IV technologies based use heavy metals...

During a Severe Accident (SA) occurring in nuclear power plant, many Fission Products (FP) are released from the degraded fuel and transported Reactor Coolant System (RCS). Depending on their volatility, FP can be either deposited surface of (RCS) or into containment building where they may environment case early failure. This was for Fukushima Daiichi (FD) accident with important releases whic...

A tubular pilot scale fixed-bed reactor for the Fischer–Tropsch Synthesis (FTS) was simulated to numerically demonstrate the conversion of synthesis gas (CO+H2) to higher hydrocarbons over an iron based catalyst. The reactor was a 3.1 cm diameter and 2.75 m length steel tube. The feed temperature were between 563583 K. Saturated water was employed to control the peak temperature within the cata...

the radiophotoluminescence property of some materials makes it possible to use them for dosimetry purposes. the silver activated metaphoshate glass 1 as an rpl dosimeter when exposed to x. or y radiations , forms fluorescent centers with long lived states ( metastate ). the silver ions (ag+) in unirradiated state produces vacancies when energy is supplied by irradiation the release of electrons...

The flux and the spectrum of reactor antineutrinos depend not only on the current reactor state, which is specified by the power level and the isotope composition of the nuclear fuel used, but also on the preceding evolution of the fuel. The spectrum of antineutrinos produced in the beta decay of fission products and other radioactive nuclei accumulated in the reactor core begin to evolve towar...

The core conversion studies of the Ghana Research Reactor Core started in 2006 and with the objective of designing an LEU core with similar operational capabilities as the original HEU core and with acceptable safety margins under both normal and accident conditions. Steadystate studies for converting the Ghana MNSR facility from HEU to LEU core have been performed using the PLTEMP/ANL V4.1 cod...

This specification is proposed for a computational problem that aims to investigate the outlet core coolant temperature behaviours induced by beam interruptions of varying duration in an XADS-type system. In order to define the common application for the proposed computational benchmark, fuel channel geometry, power data, material properties, heat transfer correlations and the point kinetics ar...

The development of First Wall, Blanket and Divertor materials which are capable of withstanding many years the high neutron and heat fluxes, is a critical path to fusion power. Therefore, the timely availability of a sound materials database has become an indispensable element in international fusion road maps. In order to provide materials design data for short term needs of ITER Test Blanket ...