In this paper we describe application of the Risk Informed Safety Margin Characterization (RISMC) approach to enhancements of nuclear power plants that are important to decisions associated with their long term operation. The RISMC approach was used to assess changes in safety margins that would occur due to hypothetical extended power uprates for a PWR loss of feedwater event and a BWR station...

The performance of diagnostic systems based on empirical models may vary in different zones of the training space. It is, thus, important to a-priori verify whether the model is working in a zone where the performance is expected to be satisfactory. In this respect, the objective of this work is to estimate the degree of confidence in the identification of nuclear transients by a diagnostic sys...

Adsorption of the trace contaminant estrone, a natural hormone and commonly abundant in surface waters and in treated as well as untreated wastewaters, to eight commercial nanofiltration (NF) and reverse osmosis (RO) membranes was investigated under welldefined conditions. Experiments were conducted in stainless steel stirred cells by spiking trace levels (100ng.L) of estrone into five differen...

Multiple Effect Distillation (MED) is generally considered to be the desalination technology most suited to integration with concentrating solar thermal collectors on a medium to large scale. However the cost and energy requirement of Reverse Osmosis (RO) have fallen significantly in recent years, so that solar thermal powered RO deserves consideration. We compare commercial desalination proces...

When the feedwater valve at outage loop of floating nuclear power plant leaks, thermal stratification occurs in steam generator. It causes lower water temperature loop. The extent hazard this phenomenon cannot be directly determined by existing measurement parameters, which poses a threat to operational safety reactor. Therefore, study adopts two routes: data-driven combined with analysis syste...

Carbon nanotubes (CNTs) with different physiochemical properties were layered onto low pressure membranes and tested for antifouling properties using a natural surface water with high fouling potential. Membranes modified with the largest diameter pristine multi-walled CNTs (MWCNTs) were most effective in controlling membrane fouling, tripling the time it took for the membrane to become noticea...

To dispose of large volumes of oilfield-produced water, an environmentally friendly method that reuses advanced-softened, silica-rich, oilfield-produced water (ASOW) as feedwater was implemented via a 10-month pilot-scale test in oilfield. However, salt deposition detrimental to the efficiency and security of steam injection system was generated in superheated steam pipeline. To evaluate the me...