Abstract: A photometric method for determination of a concentration of a film forming amine in a liquid, including providing a buffer solution of a weak acid having a pKa?4.5 and a strong acid having a pKa?1; diluting an aliquot of the buffer solution with water, and determining the pH of the diluted buffer solution; adding reagent to the diluted buffer solution and measuring an initial absorbance of the diluted buffer/reagent solution; preparing a sample solution by adding liquid containing the film forming amine to an aliquot of the buffer solution and measuring the pH of the sample solution; adjusting the pH of the sample solution to match the pH of the diluted buffer solution by adding strong acid; and adding the reagent to the pH adjusted sample solution to form a colored complex, and measuring the absorbance of the resulting solution in a photometer.

Abstract: A nuclear power plant comprising a primary coolant circuit, a steam-water circuit separated from the primary coolant circuit and a steam generator connected to the primary coolant circuit and the steam-water circuit to transfer heat from the primary coolant circuit into the steam-water circuit has at least one dosing point in the steam-water circuit to inject a reducing agent into the steam-water circuit, wherein the reducing agent is an organic compound consisting of carbon, hydrogen and oxygen. Furthermore, a method for operating said nuclear power plant and the use of the method for downtime preservation of the secondary side of a steam generator of a nuclear power plant are provided.

Abstract: A photometric method for determination of a film forming amine in a liquid, comprises a) providing a buffer solution of a weak acid having a pKa?4.5 and a strong acid having a pKa?1; b) diluting an aliquot of the buffer solution with water, and determining the pH of said diluted buffer solution; c) adding reagent to said diluted buffer solution and measuring an initial absorbance of said diluted buffer/reagent solution; d) preparing a sample solution by adding liquid containing the film forming amine to an aliquot of the buffer solution and measuring the pH of the sample solution; e) adjusting the pH of the sample solution to match the pH of the diluted buffer solution by adding strong acid; and f) adding said reagent to the pH adjusted sample solution to form a colored complex, and measuring the absorbance of the resulting solution a photometer.

Abstract: A nuclear power plant comprising a primary coolant circuit, a steam-water circuit separated from the primary coolant circuit and a steam generator connected to the primary coolant circuit and the steam-water circuit to transfer heat from the primary coolant circuit into the steam-water circuit has at least one dosing point in the steam-water circuit to inject a reducing agent into the steam-water circuit, wherein the reducing agent is an organic compound consisting of carbon, hydrogen and oxygen. Furthermore, a method for operating said nuclear power plant and the use of the method for downtime preservation of the secondary side of a steam generator of a nuclear power plant are provided.

Abstract: A method for operating a technical facility includes an expert system for diagnosing the operating state of the technical facility. Once the expert system has identified a malfunction of the technical facility, the expert knowledge available in the knowledge base of the expert system is also used parallel to the establishment of a diagnosis to calculate a regulatory intervention in the technical facility with the purpose of automatically eliminating a malfunction.

Abstract: The invention concerns a method for operating a technical facility (2) comprising an expert system (1) for diagnosing (9) the operating state of the technical facility (2). Once the expert system (1) has identified a malfunction of the technical facility (2), the expert knowledge available in the knowledge base (WB) of the expert system (1) is also used parallel to the establishment of a diagnosis (9) to calculate a regulatory intervention (u) in the technical facility (2) with the purpose of automatically eliminating a malfunction.