The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 1978
Filed:
Apr. 28, 1976
Arthur Oberle, Ennetbaden, CH;
BBC Brown Boveri & Company Limited, Baden, CH;
Abstract
A control system for a nuclear power plant which comprises a boiling-water reactor and a steam line including a control valve therein connecting the steam outlet from the reactor to a steam turbine includes a first controller of the 'I-action' type responsive to the reactor pressure and a second controller of either the 'P-action' or 'PD-action' type responsive to the pressure in the steam line immediately in advance of the control valve. A summing device is provided for adding the output signals from the two controllers, and the output from the summing device is applied to the control valve for regulating its operation. For a system wherein a pair of steam lines each including a control valve therein are connected in parallel from the reactor steam outlet to the turbine, transducers are provided for measuring the respective pressures in the steam lines and a second summing device is connected to the outputs from the transducers for determining the mean value of the respective pressures in the steam lines. The output of the second summing device is then connected to the input of the second controller.