DE2052851C - Boiling water reactor - Google Patents

Description

052 851 ₄

u η ν R by switching on secondary resistances

quenzur. former, or take it to a network, e.g. ^ _n " _enm j _t lower frequency etc.

variable frequency. punching, clamping, ngs <i ™ p _ump en lines and

According to FIG. 1, the energy is supplied via diodes 18 The mr ig , e · * _n can also be used for a

and thyristors 19 fed to the network 20. By pumping with the J ™ ' ^e! g _rculation system according to h i g. 2

corresponding dimensioning of the control angle for the 5 reactor with a £ inra ^. . ^^ _circu , _a .

Thyristors and a corresponding choice of primary frequency are used. r & _n asynchronous motors 24,

the recirculated power and the tion pumps -L, **, in _this case can be

Frequency of the return suitable values given 25 angptncfc.n we ^^ of _the pressure vessel.

will. The circulation will essentially be reduced to the "" _{but also} inside the

ger than a self-circulation that can return, io The engines «wm« · J. Feeding can

As mentioned, also via a frequency converter 21 pressure vessel arranged se π ^ ^^ ^

in a suitable manner. There can be a "« «rtreqiι _{by changing the}

gane of several pumps for the feedback to the controllable frequency en g _pt

Network can be used, whereby the reactor power phase sequence can be a

gane more pumps are used for _{pumping both} Rücspg _Missed network, so that the reactor power phase sequence, _{one; just be>} Then a very low value are controlled down 15 gen of Strornungsncni _B ^B _{ebremst that they} gerink ^{By J} ^ ^{is'? l} ? | S " _k ^g i - _m One achieves with it

can. through * ' ^ru . ^ul % ^ '"V £ ,," ^ _{n One} reaches with it

The feedback can also be provided via rectifiers as in the case of SeJ ^bs « ^irKU ^. _d ; _r according to the order

ter and driven by DC motors, possibly the same tire « _{ktem dimensions before} change

eil via magnetized synchronous generators voreh- Fig. I ₁ jeüocr, imι expediently

men. The return to the network can no environmental * o the phase sequence ^of ™™ ™ ° _{p hare} follow again

switch the pump or switch from its stop and na <.n Anue g combination of the

Drive motors are done by starting the rotor over- It is also possible to use

runs synchronously. However, arrangements according to the Mg.

change over to the drive motors.

»5

1 sheet of drawings

Claims (6)

2 052 951 A boiling water reactor of the type mentioned at the outset is to be designed in this way by the invention. that the cooling water circulation without use before, 1. Boiling water reactor, in which the water can be reduced to a strength for the shut-off valve, the cooling of the core and for achieving a 5 is less than the self-circulation.
This object is achieved according to the invention by one or more of multiphase, that at least one pump is provided for braking the controllable asynchronous motor-driven circuit, the (the) Asyn-Pu'mpen in the circuit pumped through the core nous motor (s) of this pump (s) is a reversal, characterized in that min- io the rotational direction or a return of energy least a Pjintpe _f for braking the circulation ·. allowed into the electrical network,
? Energy in 23) a reversal of the rotation or the electrical network, ie by braking the return of energy to the electrical network 15 pump, which in this case works as a turbine (20) permitted (permit). . . _'The Selbstzirkutation braked. The circulation 2. Reactor according to claim 1, characterized in that the speed is reduced, and accordingly, the recirculation box also controls the cooling effect. The control range deist. This increases the size of the reactor. ^p ei inversion 3. Reactor according to claim 2, characterized in that the direction of rotation of the pump can circulate draws that the rotor circuit of the controllable of the coolant was brought to a complete standstill Asynchronous motors to a frequency converter. (21) with motor and generator is connected. In a preferred embodiment, the inventors Feeds energy back to the grid, the return output can be controlled, ζ. Β 4. Reactor according to claim 2, characterized by a converter or diodes and thyristors draws that the rotor circuit of the controllable with variable control angle and / or output fre-asynchronous motors for the return of energy frequency, or via a frequency converter with motor via diodes (.18) and thyristors (19) with varia- and generator. This allows the circulation to de This control angle is connected to the electrical network (20) coolant even with a below the self-circuating is. 30 lation lying flow rate per unit of time 5. Reactor after a de. the preceding can be sensitively regulated. Claims, characterized in that several The invention is closer with reference to the drawing Described pumps that can be driven by an asynchronous motor. It shows optionally to pump operation or to energy Fig. 1 a reactor with external circulation return to the network can be switched. 35 pumps, 6. Reactor according to claim 1, characterized in Fig. 2 shows a reactor with internal circulation, that at least one of the pump motor pumps and to reverse its torque. F i g. 3 an alternative for repatriation, a phase changeover element connected to the network. In FIG. 1, 11 denotes the reactor vessel of a sen is. 40 boiler reactor with a reactor core 12. To the Ge Vessel II several water circulation lines with pumps 13, 14, 15, 16 are connected to the multiphase Asynchronous motors 17 are driven, only one of which is shown. 45 Normally, the circulation can be increased by changing the frequency (using a frequency converter or other facilities of a known type) of the The invention relates to a boiling water kerstromes to be controlled. The control of the flow reactor, in which the water for cooling the core mung can also be wholly or partially through a and as well as to achieve a moderator effect, the various pumps are switched off 50, and in a cooling system of one or more Man, the speed can be adjusted to a certain extent of multi-phase, controllable asynchronous motors also through secondary resistance control of the pump drives Change pumps in the circuit through the core pen motors. The armature current frequency can be pumped. can vary from 50 to 60 Hz down to about 1 Hz. The speed of asynchronous motors is often 55 ren, with the motor and the impeller being one of the Due to the supply of alternating current, low and "vasynchronous speed" is obvious Frequency regulated (cf. French patent status obtained. font 1 517 590). The frequency can be up to due to the self-circulation of the water, which one hertz can be reduced. You can vertion the circular by the heating from the reactor core 12 her also vary by the fact that one or more is caused, the water circulates in the reactor and in rcre of the pumps switches off. Without a power supply, pump lines are switched on, whereby the pumps are driven by the the asynchronous motors are driven by the heating water. Here the stranger The frequency caused by the water in the reactor core can be adjusted so that the rotor has over-self-circulation driven by the water. It is therefore rotated synchronously. You can then the motor 17 as half a problem, the water flow also under the asynchronous generator and the electrical one half of the energy given by the self-circulation back into the network in a suitable manner to regulate and thus the regulation range for the ren The feedback can either in the 50-Hzkcaktorleistungs to enlarge. Network, via a static or rotating fre-