초록 ▼

A containment system that provides complete protection entirely by passive means for the loss of coolant accident in a nuclear power plant and wherein all stored energy released in the coolant blowdown is contained and absorbed while the nuclear fuel is prevented from over-heating by a high containm

A containment system that provides complete protection entirely by passive means for the loss of coolant accident in a nuclear power plant and wherein all stored energy released in the coolant blowdown is contained and absorbed while the nuclear fuel is prevented from over-heating by a high containment back-pressure and a reactor vessel refill system. The primary containment vessel is restored to a high sub-atmospheric pressure within a few minutes after accident initiation and the decay heat is safely transferred to the environment while radiolytic hydrogen is contained by passive means.

대표청구항 ▼

In a boiling water type nuclear reactor power plant comprising a reactor assembly wherein said reactor assembly serves as steam generating means for driving associated turbine means, reactor assembly coolant system means comprising reactor coolant conduit means, reactor coolant circulated within at

In a boiling water type nuclear reactor power plant comprising a reactor assembly wherein said reactor assembly serves as steam generating means for driving associated turbine means, reactor assembly coolant system means comprising reactor coolant conduit means, reactor coolant circulated within at least a portion of said reactor assembly coolant system means, and a containment structure sealingly enclosing at least said reactor assembly and at least a portion of said reactor assembly coolant system means, the method of affecting containment of said reactor power plant during a failure of said reactor assembly coolant system means within said containment structure and an attendant vaporized loss of said reactor coolant therefrom, said method comprising the steps of providing at least one first fluid body of normally kinematically inert first fluid coolant liquid, normally preventing any direct communication of said first coolant liquid with said reactor assembly coolant system means, providing at least one second fluid body of normally kinematically inert relatively cold second fluid coolant liquid, normally preventing any direct communication of said second coolant liquid with said reactor assembly coolant system means, providing at least one third fluid body of normally kinematically inert relatively hot third fluid coolant liquid, normally preventing any direct communication of said third coolant liquid with said reactor assembly coolant system means, permitting said reactor coolant as is accidentally lost from said failure to enter into a void space defined by said containment structure and vaporize within said void space to thereby increase the pressure within said void space, permitting sufficient quantities of such accidentally lost reactor coolant to enter and vaporize within said void space as to cause said pressure within said void space to increase to a first predetermined magnitude, when said pressure of said vaporized reactor coolant attains said first predetermined magnitude permitting at least a portion of said second coolant liquid and said third coolant liquId to be communicated to said reactor assembly coolant system means as to thereby at least in part replace the volume of said reactor coolant lost therefrom due to said failure, permitting at least a portion of said vaporized reactor coolant in said void space to flow through said first coolant liquid to thereby cause said first coolant liquid through heat transference to absorb some of the energy of said vaporized reactor coolant flowing therethrough, and permitting said vaporized reactor coolant to continue to flow into said first coolant liquid to thereby result in at least substantial displacement of said first coolant liquid and an attendant flow of said first coolant liquid into said void space whereby a back pressure of sufficient magnitude is developed within said void space sufficient to prevent further depletion of said reactor coolant from said reactor assembly coolant system means through said failure.