Subsequent use reactor core cooling and heap chamber water filling system
Technical field
The utility model relates to the safety equipment of nuclear power station, more particularly, relates to a kind ofly when being used to take place loss of-coolant accident (LOCA) (LOCA), guarantees the subsequent use reactor core cooling and heap chamber water filling system of nuclear plant safety.
Background technology
Improve constantly the construction of the nuclear power station important energy source guarantee that becomes national development gradually along with the security of the ripe nuclear power station of technology.
In the present nuclear power station, the structure of nuclear reactor is: in containment, form reactor cavity, in the heap chamber, pressure vessel is set.Pressure vessel has cold leg and heat pipe section, injects cooling medium through cold leg, and pressure vessel (reactor core) is carried out conventional cooling.
For guaranteeing when the nuclear reactor generation loss of-coolant accident (LOCA) (LOCA); Can inject cooling medium and guarantee the safety of reactor fuel element to reactor core, need stable, water filling system reliably, coming be water filling in reactor core, the heap chamber; Take away heat, and guarantee the safety of reactor fuel element.
The utility model content
The technical matters that the utility model will solve is, the subsequent use reactor core cooling and heap chamber water filling system of a kind of assurance nuclear power station (reactor core and containment) safety are provided.
The utility model solves the technical scheme that its technical matters adopted: a kind of subsequent use reactor core cooling and heap chamber water filling system are provided; Comprise containment, the reactor cavity that in said containment, is provided with and be arranged on the reactor core in the said reactor cavity, also comprise fire fighting water system and safety injection system;
Said fire fighting water system comprises fire water supply, the fire extinguisher canvas hose that is connected with said fire water supply, the fire pump that on said fire extinguisher canvas hose, is provided with and the first fire-fighting valve and the second fire-fighting valve that are provided with respectively at said fire pump upstream and downstream;
Said safety injection system comprises that the peace notes water inlet pipe of pacifying the water filling source, be connected with said peace water filling source and be linked into the said fire pump upper reaches, the peace that is connected said fire pump downstream outpour water pipe and outpour inlet valve and the flowing water Valve that is provided with on the water pipe at said peace notes water inlet pipe and peace respectively;
Said peace outpours water pipe and is included as the reactor core charging pipe of said reactor core water-filling and is the heap chamber charging pipe of said heap chamber water-filling.
In the subsequent use reactor core cooling and heap chamber water filling system of the utility model, said peace notes water inlet pipe and peace outpour and also are connected with subsequent use charging pipe between the water pipe, and said subsequent use charging pipe is provided with subsequent use cooling pump and subsequent use cooling pump valve;
The parallelly connected setting of said subsequent use cooling pump with said fire pump, and select a job.
In the subsequent use reactor core cooling and heap chamber water filling system of the utility model, said peace water filling source is the interior material-changing water tank of containment that is arranged on said containment inner bottom part position.
In the subsequent use reactor core cooling and heap chamber water filling system of the utility model, said peace water filling source comprises the material-changing water tank that is arranged on outside the said containment.
In the subsequent use reactor core cooling of the utility model and heap chamber water filling system, said peace water filling source also comprises and is arranged on the containment sump that is positioned at bottom position in the said containment.
In the subsequent use reactor core cooling and heap chamber water filling system of the utility model, said peace is annotated water inlet pipe and is comprised material-changing water tank water inlet pipe that is connected with said material-changing water tank and the melt pit water inlet pipe that is connected with said containment sump;
Said inlet valve comprises material-changing water tank inlet valve and the melt pit inlet valve that on said material-changing water tank water inlet pipe and melt pit water inlet pipe, is provided with respectively.
Enforcement the utlity model has following beneficial effect: when having an accident, when needed, connect peace water filling source, the liquid coolant of utilizing fire pump will pacify the water filling source fills in reactor core, the heap chamber, and reactor core is cooled off; And peace water filling source switches to fire water supply when unavailable, is injected in reactor core, the heap chamber through the water of fire pump with fire water supply, and reactor core is cooled off, and can guarantee the integrality of the reactor fuel element in the pressure vessel.
In addition, when fire pump is unavailable, switch to subsequent use cooling pump; The liquid coolant of utilizing subsequent use cooling pump will pacify the water filling source fills in reactor core, the heap chamber; Reactor core is cooled off, can guarantee the integrality of the reactor fuel element in the pressure vessel, improved security, reliability greatly.
Description of drawings
To combine accompanying drawing and embodiment that the utility model is described further below, in the accompanying drawing:
Fig. 1 is subsequent use reactor core cooling of the utility model and the structural representation of piling chamber water filling system first embodiment;
Fig. 2 is that the subsequent use reactor core cooling of the utility model starts (material-changing water tank water intaking outside containment) synoptic diagram to the reactor core water filling with the fire pump of piling the chamber water filling system;
Fig. 3 is that the subsequent use reactor core cooling of the utility model starts (material-changing water tank water intaking outside containment) simultaneously to the synoptic diagram of reactor core with heap chamber water filling with the fire pump of piling the chamber water filling system;
Fig. 4 is the synoptic diagram that the subsequent use reactor core cooling of the utility model and the fire pump of heap chamber water filling system start melt pit (perhaps material-changing water tank) water intaking that switches in the containment;
Fig. 5 is that the subsequent use reactor core cooling of the utility model starts (material-changing water tank water intaking outside containment) synoptic diagram to the reactor core water filling with the subsequent use cooling pump of piling the chamber water filling system;
Fig. 6 is that the subsequent use reactor core cooling of the utility model starts (material-changing water tank water intaking outside containment) simultaneously to the synoptic diagram of reactor core with heap chamber water filling with the subsequent use cooling pump of piling the chamber water filling system;
Fig. 7 is the synoptic diagram that the subsequent use reactor core cooling of the utility model and the subsequent use cooling pump of heap chamber water filling system start melt pit (perhaps material-changing water tank) water intaking that switches in the containment;
Fig. 8 is subsequent use reactor core cooling of the utility model and the structural representation of piling chamber water filling system second embodiment;
Fig. 9 is that the subsequent use reactor core cooling of the utility model starts (melt pit or material-changing water tank in containment are fetched water) synoptic diagram to the reactor core water filling with the fire pump of piling the chamber water filling system;
Figure 10 is that the subsequent use reactor core cooling of the utility model starts (melt pit or material-changing water tank in containment are fetched water) simultaneously to the synoptic diagram of reactor core with heap chamber water filling with the fire pump of piling the chamber water filling system;
To be the cooling of the subsequent use reactor core of the utility model start with the subsequent use cooling pump of heap chamber water filling system Figure 11 (material-changing water tank water intaking in the containment) to the synoptic diagram of reactor core water filling;
To be the cooling of the subsequent use reactor core of the utility model start with the subsequent use cooling pump of heap chamber water filling system Figure 12 (material-changing water tank water intaking in the containment) simultaneously to the synoptic diagram of reactor core with heap chamber water filling.
Embodiment
As shown in Figure 1, be subsequent use reactor core cooling of the utility model and first embodiment of heap chamber water filling system, this system comprises containment 10, in this containment 10, is provided with reactor cavity 11, and in reactor cavity 11, is provided with reactor core 12.Certainly also comprise in some connecting lines, other the containment 10 equipment etc., do not give unnecessary details at this.
This reactor core 12 has cold leg 13 and heat pipe section, injects cooling medium through cold leg 13, and reactor core 12 inside are cooled off, and discharges through the heat pipe section then.Understandable, on the heat pipe section fast pressure relief valve can be set, when accident takes place, can reduce the pressure in the pressure vessel fast.
As shown in the figure, this subsequent use reactor core cooling comprises fire fighting water system and safety injection system with heap chamber water filling system, comes to cool off for equipment in the containment 10.
This fire fighting water system comprises fire water supply 21, the fire extinguisher canvas hose 22 that is connected with fire water supply 21, the fire pump 23 that on fire extinguisher canvas hose 22, is provided with and the first fire-fighting valve 24 and the second fire-fighting valve 25 that is provided with respectively at fire pump 23 upstream and downstreams.
This safety injection system comprises peace water filling source, is connected with peace water filling source and is linked into inlet valve and the flowing water Valve 42 that the peace at fire pump 23 upper reaches is annotated water inlet pipe, the peace that is connected fire pump 23 downstream outpours water pipe 41 and outpour setting on the water pipe 41 respectively in peace notes water inlet pipe and peace.This peace outpours water pipe 41 and is included as the reactor core charging pipe 43 of reactor core 12 water-fillings and is the heap chamber charging pipe 45 of heap chamber 11 water-fillings; Corresponding, reactor core charging pipe 43 is provided with reactor core water-filling valve 44 and heap chamber water-filling valve 46 with heap chamber charging pipe 45.
As shown in the figure, in the present embodiment, this peace water filling source comprises material-changing water tank 31 that is arranged on outside the containment 10 and the melt pit (perhaps material-changing water tank) 32 that is arranged on the containment 10 that is positioned at bottom position in the containment 10.Be full of liquid coolant in the melt pit (perhaps material-changing water tank) 32 in this material-changing water tank 31 and the containment 10, like chilled water etc.
This peace is annotated water inlet pipe and is comprised material-changing water tank water inlet pipe 33 that is connected with material-changing water tank 31 and the melt pit water inlet pipe 34 that is connected with containment 10 interior melt pits (perhaps material-changing water tank) 32.Corresponding, this inlet valve comprises the material-changing water tank inlet valve 35 and melt pit inlet valve 36 that on material-changing water tank water inlet pipe 33 and melt pit water inlet pipe 34, is provided with respectively.
Further, for when fire pump 23 can't be worked, still can the realization accident cooling, annotate water inlet pipe and peace in peace and outpour and also be connected with subsequent use charging pipe 37 between the water pipe 41.This subsequent use charging pipe 37 is provided with subsequent use cooling pump 38 and valve 39.This subsequent use cooling pump 38 and fire pump 23 parallelly connected settings, and select a job, play subsequent use effect.
To shown in Figure 4, be to use fire pump 23 like Fig. 2 to the synoptic diagram of reactor core 12 with heap chamber 11 water-fillings.When other waterflood system faults of reactor; At first open material-changing water tank inlet valve 35, peace outpours the flowing water Valve 42 of water pipe 41, the water-filling valve 44 on the reactor core charging pipe 43; Start the material-changing water tank 31 of fire pump 23 outside containment 10 and draw water to the cold pipeline injection cooling medium of reactor core 12, cooling medium flows into reactor core 12 from cold pipeline and derives heat (see figure 2) in the heap.
When reactor outlet temperature during greater than 600 ℃; Open heap chamber water-filling valve 46 on the heap chamber charging pipe 45 to heap chamber 11 water-fillings; To pile the two-way type of cooling of interior back out-pile earlier, derive in the reactor and the temperature outside the reactor core 12, guarantee the integrality (see figure 3) of reactor core 12 fuel elements and reactor core 12.
When the cooling medium of the material-changing water tank outside the containment 10 31 is evacuated; Close material-changing water tank inlet valve 35; Open melt pit inlet valve 36, the melt pit 32 that fire pump 23 switches in the containment 10 draws water, and continues to inject cooling medium simultaneously to reactor core 12 and heap chamber 11; Derive in the reactor core 12 and the temperature outside the reactor core 12, guarantee the integrality (see figure 4) of reactor core 12 fuel elements and reactor core 12.
When other waterflood systems of reactor and fire pump 23 faults; At first open material-changing water tank inlet valve 35, cooling pump valve 39, peace outpours the flowing water Valve 42 of water pipe 41, the water-filling valve 44 on the reactor core charging pipe 43; Start the material-changing water tank 31 of subsequent use cooling pump 38 outside containment 10 and draw water to cold pipeline (perhaps directly to reactor core 12) the injection cooling medium of reactor core 12, cooling medium flows into reactor core 12 from cold pipeline and derives heat (see figure 5) in the heap.
When reactor outlet temperature during greater than 600 ℃; Open heap chamber 11 filling valves to heap chamber 11 water-fillings; To pile the two-way type of cooling of interior back out-pile earlier, derive in the reactor and the temperature outside the reactor core 12, guarantee the integrality (see figure 6) of reactor core 12 fuel elements and reactor core 12.
When the cooling medium of the material-changing water tank outside the containment 10 31 is evacuated; Close material-changing water tank inlet valve 35; Open melt pit 32 water intaking valves 36, the melt pit 32 that subsequent use cooling pump 38 switches in the containment 10 draws water, and continues to inject cooling medium simultaneously to reactor core 12 and heap chamber 11; Derive in the reactor and the temperature outside the reactor core 12, guarantee the integrality (see figure 7) of reactor core 12 fuel elements and reactor core 12.
When material-changing water tank 31 or melt pit 32 faults can not be used, open the first fire-fighting valve 24 and the second fire-fighting valve 25, can use the fire water water source to carry out reactor core 12 coolings and pile chamber 11 water-fillings.
As shown in Figure 8; Be subsequent use reactor core cooling of the utility model and second embodiment of heap chamber water filling system; The difference of itself and first embodiment is; Peace water filling source is to be arranged on the containment material-changing water tank 232 that is positioned at the bottom position place in the containment 210, and other structures and first embodiment are basic identical, so do not give unnecessary details.
When other waterflood system faults of reactor; Inlet valve 236, the peace at first opened on the peace notes water inlet pipe 234 outpour the flowing water Valve 242 of water pipe 241, the water-filling valve 244 on the reactor core charging pipe 243; Starting fire pump 223 draws water from the material-changing water tank 232 in the containment 210; Cold pipeline 213 to reactor core 212 injects cooling medium, and cooling medium flows into reactor core 212 from cold pipeline 213 and derives heat (see figure 9) in the heap.
When reactor outlet temperature during greater than 600 ℃; Open heap chamber filling valve 246 through piling chamber charging pipe 245 to heap chamber 211 water-fillings; The two-way type of cooling with back out-pile in piling earlier; Derive in the reactor and the temperature outside the reactor core 212, guarantee the integrality (see figure 10) of reactor fuel element and reactor core 212.
When other safety injection systems of reactor and fire pump 223 faults; At first open peace and annotate the inlet valve 236 on the water inlet pipe 234, flowing water Valve 242, the water-filling valve 244 on the reactor core charging pipe 243 and the subsequent use cooling pump valve 239 that peace outpours water pipe 241; Start subsequent use cooling pump 238; Material-changing water tank 232 in containment 210 draws water; Inject cooling medium through subsequent use charging pipe 237 to the cold pipeline 213 (perhaps directly to reactor core) of reactor core 212, cooling medium flows into reactor core 212 from cold pipeline 213 and derives heat (seeing Figure 11) in the heap.
When reactor outlet temperature during greater than 600 ℃; Open heap chamber filling valve 246 to heap chamber 211 water-fillings; To pile the two-way type of cooling of interior back out-pile earlier, derive in the reactor and the temperature outside the reactor core 212, guarantee the integrality (seeing Figure 12) of reactor fuel element and reactor core 212.
When the material-changing water tank in the containment 210 232 can not use, open the first fire-fighting valve 224 and the second fire-fighting valve 225, can use fire water water source 221 to carry out reactor core cooling and heap chamber water-filling through fire protection pipeline 222.
Above disclosedly be merely the utility model preferred embodiment, can not limit the interest field of the utility model certainly with this, the equivalent variations of therefore being done according to the utility model claim still belongs to the scope that the utility model is contained.