• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A cooling water supply tank having a thermal mixing prevention function and a passive high pressure safety injection system and method using the same. A passive high pressure safety injection system includes a compressor (20) that generates high temperature and high pressure steam, a cooling water supply tank (40) that supplies the cooling water using the compressed steam, a nuclear reactor (50) which receives the cooling water so that the nuclear reactor is kept in a cooled state, and an internal circulation prevention structure which is provided in the water supply tank of cooling and prevents the cooling water from circulating in the cooling water supply tank.
    公开号:FR3025047A1
    申请号:FR1457897
    申请日:2014-08-20
    公开日:2016-02-26
    发明作者:Tae-Soon Kwon；Kihwan Kim
    申请人:Korea Atomic Energy Research Institute KAERI；
    IPC主号:
    专利说明:

    [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to cooling water supply tanks having thermal mixing prevention functions and high pressure safety injection passive systems and methods using the cooling water supply tanks and more particularly, a cooling water supply tank having a thermal mixing preventing function which can prevent mixing of the internal cooling water circulation and the heat, which is caused by the high temperature and high pressure steam injected into a core booster tank and a hybrid safety injection tank when the booster tank of the core and the hybrid safety injection tank are actuated, thus limiting a temperature increase from a free surface of make-up water to a lower part of the reservoir, and now a significant difference in density, whereby the injection of cooling water into a nuclear reactor can be facilitated, and a passive high-pressure safety injection system and the process using the cooling water supply. 2. Description of the Related Art As examples of techniques relating to safety injection system systems of nuclear reactor emergency cooling systems, the tanks of the AP600-type core (FIG. CMT) have been disclosed in US Pat. No. 5,268,943 shown in Fig. 1 and in "Nuclear Engineering and Design", Vol. 186, pages 279-301, and a CARR core backup tank (CP1300) has been introduced in NUREGLA-0134.
    [0002] In addition, as shown in FIG. 2, a hybrid safety injection reservoir (hybrid SIT) that can operate both at low pressure and at high pressure has been proposed in Korean Patent Registration No. 10-1071415 ( date of registration: September 30, 2011), entitled "Passive High Pressure Safety Injection Tank 15 for SOB and LOCA". This technique has a combined structure consisting of a conventional low pressure SIT (safety injection tank) and a conventional high pressure CTM (core booster tank). A pressure equalizing pipe is provided to balance the pressure between the low pressure SIT and a high pressure compressor, and an engine drive valve or pneumatic drive valve is provided on the pressure equalizing pipe. and is used if necessary. Meanwhile, in the conventional art, when high temperature, high pressure steam is injected into the core booster tank or the hybrid safety injection tank, the emergency cooling water heart circulates in the core booster tank or the hybrid safety tank. Thus, all of the emergency cooling water of the core 5 is rapidly heated. Therefore, at an early stage, the density between the core backup tank or the hybrid safety injection tank and a nuclear reactor connected thereto becomes the same. For this reason, it is impossible for the emergency cooling water of the core to be injected into the nuclear reactor by natural circulation. In other words, the driving force through which the emergency cooling water of the core is injected into the nuclear reactor is considerably reduced. FIGS. 3A and 3B illustrate a problem of emergency cooling water of the core which has been previously heated by internal circulation in the core booster tank or the hybrid safety injection tank according to the conventional technique. Figure 3A shows the vertical distribution of the temperature of the cooling water in the core booster tank or the hybrid safety injection tank when there is no circulation in the booster tank. from the heart or the hybrid safety injection tank. If there is no internal circulation, only a part of the free surface on which the high temperature steam is in contact with makeup water 3025047 4 is heated by the high temperature steam. As a result, the temperature of all cooling water is only slightly increased. Fig. 3B shows the vertical distribution of the temperature of the cooling water in the core booster tank or the hybrid safety injection tank when there is circulation in the booster tank of the core or the hybrid safety injection tank. If there is an internal circulation, not only the free surface portion on which the high temperature vapor is in contact with the make-up water, but also the internal portion of the make-up water is heated by internal circulation. Thus, the temperature of the cooling water in the core booster tank or the hybrid safety injection tank is increased in a relatively large manner. Thus, if the temperature of the inner part of the cooling water is increased, a difference in density (pair - ps) between the density (pOE) of the makeup water and the density (ps) of the water cooling of the nuclear reactor is reduced. For this reason, the driving force through which the cooling water is injected into the nuclear reactor is reduced. SUMMARY OF THE INVENTION Accordingly, the present invention has been made with the above problems in the prior art in mind, and it is an object of the present invention to provide a feed tank. in water having a thermal mixing prevention function which can prevent the provocation of the thermal mixture by the internal circulation of a cooling water supply tank 5 when the high temperature and high pressure steam is injected into a reservoir of core booster or a hybrid safety injection tank, and a passive high-pressure safety injection system and the method using the water supply tank.
    [0003] In order to achieve the above object, in one aspect, the present invention provides a cooling water supply tank having a thermal mixing prevention function, the cooling water supply tank providing the cooling water using compressor-compressed steam, and including an internal circulation prevention structure to prevent circulation of the cooling water into the cooling water supply tank. The internal circulation prevention structure may comprise at least one cooling water guide preventing the cooling water from moving into the cooling water supply tank, the cooling water guide separating at least one part of an internal space of the cooling water supply tank in a plurality of zones. The cooling water guide may comprise at least 3025047 vertical separation. The height of the cooling water guide may be greater than the level of cooling water in the cooling water supply tank when the cooling water supply tank is in a waiting state prior to to be operated. The cooling water guide may contain non-corrosive metal. The cross section of the internal circulation prevention structure may have a shape selected from a shape having a plurality of polygons, a circular shape and a spiral shape. In another aspect, the present invention provides a passive high pressure safety injection system having a thermal mixing prevention function, comprising: a compressor supplying high temperature and high pressure steam; a cooling water supply tank supplying cooling water using the high temperature, high pressure steam supplied by the compressor; a nuclear reactor receiving the cooling water so that the nuclear reactor is maintained in a cooled state; and an internal circulation prevention structure provided in the cooling water supply tank, the internal circulation preventing structure preventing cooling water from circulating in the cooling water supply tank.
    [0004] 3025047 7 The cooling water supply tank may include a core backup tank or a hybrid safety injection tank. The internal circulation prevention structure may comprise at least one cooling water guide preventing displacement of the cooling water in the cooling water supply tank, the cooling water guide separating at least one part of an internal space of the cooling water supply tank in a plurality of zones. The cooling water guide may comprise at least one vertical separation. The height of the cooling water guide is greater than the level of the cooling water in the cooling water supply tank when the cooling water supply tank is in a waiting state prior to to be operated. The cooling water guide may contain non-corrosive metal. The cross section of the internal circulation prevention structure may have a shape selected from a shape having a plurality of polygons, a circular shape and a spiral shape. The passive high-pressure safety injection system may further comprise a pressure equalizing pipe provided between the compressor and the cooling water supply tank, the pressure equalizing pipe maintaining a pressure of 3025047 between the compressor and the cooling water supply tank in a state of equilibrium. Preferably, the pressure equalizing pipe may comprise a pressure equalization control valve provided to maintain the pressure between the compressor and the equilibrium cooling water supply tank. The pressure equalizing control valve can be operated with the backup power supply using a battery even during a power plant power failure accident. In another aspect, the present invention provides a passive high pressure safety injection method with a thermal mixing prevention function, comprising the steps of: bringing the high pressure and high pressure steam compressed by a compressor to a cooling water supply tank; preventing the cooling water from circulating in the cooling water supply tank by means of an internal circulation prevention structure provided in the cooling water supply tank; Bringing the cooling water, the circulation of which is prevented in the cooling water supply tank, to the nuclear reactor; and maintaining the nuclear reactor in a cooled state using the cooling water supplied to the nuclear reactor.
    [0005] The step of supplying the high temperature and high pressure steam compressed by the compressor to the cooling water supply tank may include the step of opening a pressure balancing control valve provided between the compressor and the water supply tank cooling. The pressure balancing control valve can be actuated by the emergency power supply using a battery even during a power plant power failure accident.
    [0006] By using the internal circulation prevention structure provided in the cooling water supply tank to prevent the flow of cooling water into the cooling water supply tank, at least one water guide of cooling may be provided in the cooling water supply tank to prevent the cooling water from moving into the cooling water supply tank, in which the cooling water moves through the guide cooling water so that the high temperature, high pressure steam supplied by the compressor can not mix with the cooling water. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. representing an auxiliary reservoir of the heart according to a conventional technique; Fig. 2 is a view illustrating the construction of a hybrid safety injection reservoir system according to a conventional technique; FIGS. 3A and 3B are views showing the temperature variation of the cooling water as a function of the circulation of the cooling water in the core booster tank or the hybrid safety injection tank in accordance with FIG. classical technique; Fig. 4 is a sectional view illustrating a passive high pressure safety injection system according to an embodiment of the present invention; Fig. 5 is a sectional view illustrating a passive high pressure safety injection system according to another embodiment of the present invention; Fig. 6 is a view showing the temperature of the cooling water in a cooling water supply tank of the passive high pressure safety injection system according to one embodiment of the present invention; Fig. 7 is a view showing examples of a cross-sectional shape of an internal circulation prevention structure provided in the cooling water supply tank according to one embodiment of the present invention; and Fig. 8 is a flowchart showing a passive high pressure safety injection process using a thermal mixing prevention device according to an embodiment of the present invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the preferred embodiments of the present invention are described in detail with reference to the accompanying drawings. Reference should now be made to the drawings, in which the same reference numbers are used on all the different drawings in order to designate the same or similar components. If, in the description, detailed descriptions of well-known functions or configurations unnecessarily obscured the essence of the present invention, the detailed descriptions would be omitted. Fig. 4 is a sectional view illustrating a passive high pressure safety injection system 20 according to one embodiment of the present invention. With reference to FIG. 4, the passive high-pressure safety injection system 1 comprises a steam generator 10, a compressor 20, a pressure equalization pipe 30, a cooling water supply tank 40 , a nuclear reactor 3025047 12 50 and a cooling water recirculation pump 60. The pressure equalizing pipe 30 comprises a pressure balancing control valve 31. The cooling water supply tank 40 comprises an internal circulation preventing structure 41 provided in a cooling water guide 42. The compressor 20 is connected to the cooling water supply tank 40 by the pressure equalizing pipe 30. The compressor 20 can contain high temperature steam inside the latter. The pressure equalizing pipe 30 is disposed between the compressor 20 and the cooling water supply tank 40. The pressure equalizing pipe 30 operates to maintain the pressure between the compressor 20 and the supply tank in cooling water 40 in a state of equilibrium. Preferably, the pressure balancing pipe 30 is provided with a pressure balancing control valve 31 for use to maintain the pressure between the compressor 20 and the cooling water supply tank 40 in a steady state. The pressure balancing control valve 31 is configured so that even during a power plant failure event, it can be operated by a backup power supply using a battery.
    [0007] In a detailed manner, the compressor 20 is connected to an upper part of the cooling water supply tank 40 by the pressure equalizing pipe 30 so that the high pressure compressor 20 and the feed tank low pressure cooling water 40 are pressure balanced. In addition, the cooling water supply tank 40 may use steam compressed by the compressor 20 to supply the cooling water to the nuclear reactor 50. The cooling water supply tank 40 has the structure of prevention of internal circulation 41 inside the latter. Placed in the cooling water supply tank 40, the internal circulation preventing structure 41 prevents the flow of cooling water into the cooling water supply tank 40. The water supply tank cooler 40 includes a core backup tank or a hybrid safety injection tank. Figure 3 illustrates an embodiment of the booster reservoir 20 of the heart. To prevent the cooling water from undesirably moving in the cooling water supply tank 40, the internal circulation prevention structure 41 has, inside the latter, at least one guide 25 of cooling water 42 which separates at least a portion of the internal space of the cooling water supply tank 40 into a plurality of zones. The cross-section of the internal circulation prevention structure 41 has a shape selected from a shape having a plurality of polygons, a circular shape and a spiral shape. In addition, the internal circulation prevention structure 41 is a device for preventing thermal mixing. The cooling water guide 42 comprises at least one vertical separation. The smaller the thickness of the cooling water guide 42 is to reduce a ratio of the volume of the vertical separation to the volume of fluid, the better. The height of the cooling water guide 42 is greater than the level of cooling water in the cooling water supply tank 40, when the cooling water supply tank 40 is in a waiting state before being operated. It is preferred that the cooling water guide 42 contain non-corrosive metal. By receiving cooling water from the cooling water supply tank 40, the nuclear reactor 50 can be maintained in a cooled state. Here, in the present invention, thermal mixing and early heating are prevented by limiting the internal circulation in the cooling water supply tank 40. Such a prevention of thermal mixing and early heating of the supply tank 25 The cooling water 40 can considerably increase the driving force by which the cooling water is injected into the nuclear reactor 50. The cooling water recirculation pump 60 is provided between the nuclear reactor 50 and the generator. 5 and applies the pressure to the cooling water which has cooled the nuclear reactor 50 and has been discharged therefrom, thus flowing the cooling water to the steam generator 10. FIG. a sectional view illustrating a passive high pressure safety injection system 10 according to another embodiment of the present invention. nvention. With reference to FIG. 5, the passive high-pressure safety injection system 2 according to this embodiment comprises a steam generator 10, a compressor 20, a pressure equalizing pipe 30, a feed tank in cooling water 40, a nuclear reactor 50 and a cooling water recirculation pump 60. The pressure equalizing pipe 30 comprises a pressure balancing control valve 31. The water supply tank 40 comprises an internal circulation prevention structure 41 which is provided with a cooling water guide 42. With respect to FIG. 4, although the system of FIG. 5 has the same elements as those of FIG. FIG. 5 illustrates another embodiment relating to a hybrid safety injection reservoir 3025047 in the cooling water supply tank 40. FIG. 6 is a view showing the temperature of the cooling water in a cooling water supply tank of the high pressure safety passive injection system according to an embodiment of the present invention. With reference to FIG. 6, the level of the cooling water in the cooling water supply tank 40 is reduced with time. The temperature of the cooling water varies depending on the level of cooling water. Here, a first cooling water temperature 510 designates the temperature of the cooling water in the case of the conventional technique. A second cooling water temperature 520 designates the temperature of the cooling water in the case of the present invention. In the conventional art, the cooling water of the cooling water supply tank 40 is circulated by the high temperature steam supplied to the cooling water supply tank 40. Such a circulation of cooling water increases the first cooling water temperature 510. Over time, as the cooling water level decreases, the first cooling water temperature 510 increases further. On the other hand, in the present invention, the internal circulation prevention structure 41 provided in the cooling water supply tank 40 reduces the circulation of the cooling water, which is explained by the high temperature steam supplied to the cooling water supply tank 40. By reducing the circulation of the cooling water, the second cooling water temperature 520 does not change much. In other words, the cooling water in the cooling water supply tank 40 can be kept at a low temperature, whereby the driving force by which the cooling water is injected into the nuclear reactor 50 can be increased. Fig. 7 is a view showing examples of a cross-sectional shape of the internal circulation prevention structure provided in the cooling water supply tank 15 according to one embodiment of the present invention. Referring to Figure 7, the cooling water supply tank 40 has the internal circulation prevention structure 41, within the latter. The internal circulation prevention structure 41 operates to prevent the cooling water from flowing into the cooling water supply tank 40. The internal circulation preventing structure 41 comprises at least one cooling water guide 42 which separates at least a portion of the internal space of the cooling water supply tank 40 into a plurality of zones. Here, the cross section 3025047 of the internal circulation prevention structure 41 is formed into a shape having a plurality of polygons, a circular shape or a spiral shape by the cooling water guide 42 comprising at least one vertical separation .
    [0008] Fig. 8 is a flowchart showing a passive high pressure safety injection process using a thermal mixing prevention device according to an embodiment of the present invention. Referring to Fig. 8, a pressure equalizing isolation valve 10 shown in Figs. 2 and 3 is opened to bring the high temperature and high pressure vapor from the compressor into the water supply tank of cooling 40 (at step S10). Then, the high temperature, high pressure steam is supplied from the compressor to the cooling water supply tank 40 (at step S20). Circulation of the cooling water is prevented in the cooling water supply tank 40, which is due to the steam supplied by the compressor 20 (at step S30). In one embodiment, the internal circulation prevention structure 41 provided in the cooling water supply tank 40 prevents the cooling water from circulating in the cooling water supply tank 40. cooling water to undesirably move into the cooling water supply tank 40, the internal circulation prevention structure 41 comprises at least one cooling water guide 42 which separates at least a portion of the internal space of the cooling water supply tank 40 in a plurality of zones. The cooling water supply tank 40 supplies the cooling water to the nuclear reactor 50 while the circulation of the cooling water is prevented by the internal circulation prevention structure 42 (in step S40).
    [0009] The nuclear reactor 50 is maintained in a cooled state using the cooling water provided by the cooling water supply tank 40 (in step S50). As described above, in a cooling water supply tank having a thermal mixing prevention function and a passive high pressure safety injection system according to an embodiment of the present invention Anticipated internal circulation prevention in a cooling water supply tank can reduce cooling water circulation and thermal mixing in the cooling water supply tank. Thus, a large difference in density can be maintained between a high temperature nuclear reactor and a cooling water supply tank. In addition, the driving force through which the cooling water is injected into the nuclear reactor can be considerably increased. In addition, by virtue of an increased cooling water injection driving force, the emergency cooling safety of the nuclear reactor can be ensured. While preferred embodiments of the present invention have been described for purposes of illustration, those skilled in the art will appreciate that various modifications, additions and replacements are possible without departing from the scope or the spirit of the invention, as described in the appended claims.
    权利要求:
    Claims (20)
    [0001]
    REVENDICATIONS1. A cooling water supply tank (40) having a thermal mixing preventing function, the cooling water supply tank supplying cooling water using steam compressed by a compressor (20), and comprising an internal circulation prevention structure (41) for preventing the flow of cooling water into the cooling water supply tank.
    [0002]
    The cooling water supply tank (40) according to claim 1, wherein the internal circulation prevention structure comprises at least one cooling water guide (42) preventing the cooling water from moving. in the cooling water supply tank, the cooling water guide separating at least a portion of an internal space of the cooling water supply tank into a plurality of zones. 20
    [0003]
    The cooling water supply tank (40) according to claim 2, wherein the cooling water guide (42) comprises at least one vertical partition.
    [0004]
    The cooling water supply tank (40) according to claim 2, wherein a height of the cooling water guide (42) is greater than a cooling water level in the storage tank (40). cooling water supply, when the cooling water supply tank is in a waiting state before being actuated.
    [0005]
    The cooling water supply tank (40) according to claim 2, wherein the cooling water guide (42) contains non-corrosive metal.
    [0006]
    A cooling water supply tank (40) according to claim 1, wherein a cross section of the internal circulation prevention structure has a shape selected from a shape having a plurality of polygons, a circular shape and a shape spiral.
    [0007]
    A passive high pressure safety injection system having a thermal mixing prevention function, comprising: a compressor (20) providing high temperature and high pressure steam; a cooling water supply tank (40) providing the cooling water using the high temperature, high pressure steam supplied by the compressor; a nuclear reactor (50) receiving the cooling water so that the nuclear reactor is maintained in a cooled state; and an internal circulation prevention structure provided in the cooling water supply tank, the internal circulation preventing structure preventing cooling water from circulating in the cooling water supply tank.
    [0008]
    The passive high pressure safety injection system of claim 7, wherein the cooling water supply tank (40) comprises a core backup tank or a hybrid safety injection tank.
    [0009]
    The passive high pressure safety injection system according to claim 7, wherein the internal circulation prevention structure comprises at least one cooling water guide (42) preventing the cooling water from moving in the cooling water supply tank (40), the cooling water guide separating at least a portion of an internal space of the cooling water supply tank into a plurality of zones.
    [0010]
    The passive high pressure safety injection system of claim 9, wherein the cooling water guide (42) comprises at least one vertical partition.
    [0011]
    The passive high pressure safety injection system of claim 9, wherein a height of the cooling water guide (42) is greater than a cooling water level in the water supply tank of cooling when the cooling water supply tank (40) is in a waiting state before being actuated.
    [0012]
    12. The high-pressure passive safety injection system of claim 9, wherein the cooling water guide (42) contains non-corrosive metal.
    [0013]
    The passive high pressure safety injection system of claim 7, wherein a cross section of the internal circulation prevention structure has a shape selected from a shape having a plurality of polygons, a circular shape and a shape. spiral.
    [0014]
    The passive high pressure safety injection system of claim 7, further comprising a pressure balancing pipe (30) provided between the compressor (20) and the cooling water supply tank (40). ), the pressure balancing pipe maintains a pressure between the compressor and the cooling water supply tank in a state of equilibrium.
    [0015]
    The passive high pressure safety injection system according to claim 14, wherein the pressure balancing pipe (30) comprises a pressure balancing control valve (31) provided to maintain the pressure between the compressor (20) and the cooling water supply tank (40) at steady state. 3025047
    [0016]
    The passive high pressure safety injection system according to claim 15, wherein the pressure balancing control valve (31) is actuated by the emergency power supply using a battery even during an accident. power plant power failure.
    [0017]
    17. A passive high pressure safety injection method with a thermal mixing prevention function, comprising the steps of: (S20) supplying high pressure and high pressure steam compressed by a compressor (20) to a cooling water supply tank (40); preventing (S30) the cooling water from circulating in the cooling water supply tank by using an internal circulation prevention structure in the cooling water supply tank; supplying (S40) the cooling water, the circulation of which is prevented in the cooling water supply tank, to the nuclear reactor (50); and maintaining (S50) the nuclear reactor in a cooled state using the cooling water supplied to the nuclear reactor.
    [0018]
    The passive high pressure safety injection method of claim 17, wherein the step of supplying the high pressure and high pressure vapor compressed by the compressor (20) to the cooling water supply tank. (40) includes the step of opening (S10) a pressure balancing control valve (31) provided between the compressor and the cooling water supply tank.
    [0019]
    The passive high pressure safety injection method according to claim 18, wherein the pressure equalizing control valve (31) is actuated by the emergency power supply using a battery even during a safety accident. power plant power failure.
    [0020]
    The passive safety high pressure injection method of claim 17, wherein when using the internal circulation prevention structure provided in the cooling water supply tank (40) to prevent circulation. cooling water in the cooling water supply tank, at least one cooling water guide (42) is provided in the cooling water supply tank to prevent the cooling water from moving in the cooling water supply tank, wherein the cooling water is moving through the cooling water guide so that the high temperature and high pressure steam supplied by the compressor can not not be mixed with the cooling water.
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    同族专利:
    公开号 | 公开日
    US9672946B2|2017-06-06|
    US20150243384A1|2015-08-27|
    KR101446709B1|2014-10-06|
    FR3025047B1|2019-06-07|
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    KR101764111B1|2016-04-18|2017-08-16|한국원자력연구원|Apparatus for reducing steam condensing of hybrid safety injection tank|
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    CN111128414A|2019-12-31|2020-05-08|中国核动力研究设计院|Active and passive combined safety system and method for nuclear power plant|
    法律状态:
    2015-05-28| PLFP| Fee payment|Year of fee payment: 2 |
    2016-05-31| PLFP| Fee payment|Year of fee payment: 3 |
    2017-07-18| PLFP| Fee payment|Year of fee payment: 4 |
    2017-12-15| PLSC| Search report ready|Effective date: 20171215 |
    2018-06-22| PLFP| Fee payment|Year of fee payment: 5 |
    2019-08-21| PLFP| Fee payment|Year of fee payment: 6 |
    2020-06-09| PLFP| Fee payment|Year of fee payment: 7 |
    2021-06-25| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020140023521|2014-02-27|
    KR1020140023521A|KR101446709B1|2014-02-27|2014-02-27|Passive High Pressure Safety Injection System with Anti-Thermal Mixing Device|
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