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:
Aug. 22, 1978
Filed:
Jul. 11, 1975
Takao Sato, Ibaraki, JP;
Sakae Sugiyama, Hitachi, JP;
Hitachi, Ltd., , JP;
Abstract
A plurality of local power range monitors are provided in the core of a nuclear reactor and the total output of the reactor is obtained from the outputs of the monitors. The output of the reactor, if it reached its equilibrium state, will normally keep a constant value, but after the load is changed, the output is also varied by the influence of the neutron absorbing property of the fission products generated as a result of the load change, and especially after the reactor output has been increased, it is spontaneously increased over its setting value to cause the reactor to overheat. The minimum allowable recirculating flow which prevents the overheat at a given total output, is obtained on the basis of the total output. If the actual recirculating flow is larger than the minimum allowable flow, the recirculating flow is freely controlled, but if the actual flow is smaller than the minimum value, the control of the recirculating flow is prohibited and the control rods are inserted for the control of the reactor output. The insertion begins with one of the control rods near the local power range monitor whose output is the maximum.