CN203366759U - Atmospheric emission system of nuclear power plant - Google Patents
Atmospheric emission system of nuclear power plant Download PDFInfo
- Publication number
- CN203366759U CN203366759U CN2013203063037U CN201320306303U CN203366759U CN 203366759 U CN203366759 U CN 203366759U CN 2013203063037 U CN2013203063037 U CN 2013203063037U CN 201320306303 U CN201320306303 U CN 201320306303U CN 203366759 U CN203366759 U CN 203366759U
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- China
- Prior art keywords
- power plant
- nuclear power
- release system
- valve
- airborne release
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The utility model relates to an atmospheric emission system of a nuclear power plant, which comprises at least two discharge ducts; the discharge ducts are arranged on a main steam pipeline; an atmospheric emission valve is arranged on each discharge duct; an isolation valve is arranged on the upstream of each atmospheric emission valve, and a drain pipeline is arranged on the downstream of each atmospheric emission valve; a drain tank is connected to the tail ends of the drain pipelines. After the technical scheme is adopted, under the working condition of an accident that the heat transfer tube of a steam generator cracks, the atmospheric emission valves on the discharge ducts are opened so as to provide relatively high cooling rate to a return circuit and ensure that the return circuit can be in a safety state relatively quickly; during the normal operation period of the nuclear power plant, the discharge ducts can provide redundant overpressure protection for the main steam pipeline, so as to ensure relatively high reliability and heat rejection capability of the system.
Description
Technical field
The utility model belongs to the gas discharging field of nuclear power plant, is specifically related to a kind of airborne release system of nuclear power plant.
Background technology
Nuclear power plant's airborne release system is to reduce the important system of temperature, pressure in nuclear steam supply system, when load dump and condenser when unavailable, the operating point that need to be cooled to residual heat removal system to drop into reactor coolant loop by this airborne release system.In power plant's transient process, the airborne release system can avoid the steam generator safety valve to open.In the design of commercial nuclear power system in the past, nuclear power plant's airborne release system is as shown in Figure 3: every steam generator arranges a discharge-channel, under the accident of steam generator tube rupture, need a steam generator of isolation, if now consider single failure, suppose that an atmospheric dump valve fault can't open, only a surplus gas exhaust duct can afterheat cooling, arrange like this and can reduce the cooldown rate to a loop, accident mitigation is brought to adverse influence.
The utility model content
For the defect existed in prior art, the utility model provides a kind of airborne release system of nuclear power plant, under the steam generator tube rupture accident conditions, can open many gas exhaust ducts, strengthens the heat removal capacity of system.
For reaching above purpose, the technical solution adopted in the utility model is: the airborne release system that a kind of nuclear power plant is provided, comprise at least two gas exhaust ducts, described gas exhaust duct is arranged on main steam line, be provided with atmospheric dump valve on every described gas exhaust duct, the upstream of described atmospheric dump valve is provided with isolation valve, and the downstream of described atmospheric dump valve is provided with drain water piping, and the end of described drain water piping connects drain trap.
Further, many described gas exhaust ducts are connected with main steam line by an ozzle.
Further, the ozzle that described gas exhaust duct passes through separately respectively is connected with main steam line.
Further, described gas exhaust duct independently arranges separately.
Further, many described gas exhaust duct ends are connected with a house steward.
Further, every of institute states drain water piping and is provided with flow-through orifice.
Further, the pneumatic control valve that described atmospheric dump valve is Long-distance Control, be connected with compressed air system by gas supply line.
Further, described gas supply line is provided with bailout gas, between described atmospheric dump valve and bailout gas, is provided with the electronic isolation valve of master in parallel and the electronic isolation valve of bypass.
Further, also be provided with manual air feed isolation valve on described gas supply line.
Further, the end of every described exhaust line is provided with exhaust box.
Useful technique effect of the present utility model is:
(1) under the steam generator tube rupture accident conditions, open the atmospheric dump valve of many discharge tubes, for a loop provides higher cooldown rate, make a loop reach faster safe condition;
(2) at power plant's normal operation period, many discharge tubes can be the overpressure protection that main steam line provides redundancy, and this makes the reliability of this system higher;
(3), in the process of a loop decrease temperature and pressure, many discharge tubes make the heat removal capacity of system stronger.
The accompanying drawing explanation
Fig. 1 is the structural representation of the airborne release system of the utility model nuclear power plant;
Fig. 2 a-2d is the gas exhaust duct of airborne release system of the nuclear power plant connected mode different from main steam line and the structural representation of discharging modes;
Fig. 3 is the structural representation of nuclear power plant's airborne release system in prior art.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
As shown in Figure 1, the airborne release system of the nuclear power plant that the utility model provides, comprise at least two gas exhaust duct N1-N2, N3-N4, and it is upper that gas exhaust duct is arranged on main steam line N1-N3, and the end of gas exhaust duct is communicated with atmosphere B.Every gas exhaust duct is provided with atmospheric dump valve 1, in atmospheric dump valve 1 upstream, is provided with isolation valve 2, and isolation valve 2 is powered or powered by the emergency diesel-oil machine under accident conditions by different power-supply systems.Be provided with drain water piping N5-N7, N6-N7 in atmospheric dump valve 1 downstream, the drain water piping end connects the drain trap A of main steam system; Be provided with flow-through orifice 3 on drain water piping N5-N7, can control the flow of drain water piping water.The end of every gas exhaust duct is provided with exhaust box 4, the noise produced in order to reduce gas exhaust duct.
The pneumatic control valve that atmospheric exhaust valve 1 is Long-distance Control, by compressed air system 5 air feed for instrument, atmospheric exhaust valve 1 is connected by gas supply line with compressed air system 5, in order to guarantee the normal air feed of atmospheric exhaust valve 1, be provided with bailout gas 6 on the gas supply line be connected with compressed air system 5 at the atmospheric exhaust valve, bailout gas is the pressurized air surge tank, and this compression air feed surge tank can be the gas consumption that an atmospheric dump valve provides at least 14 hours.
Be provided with the electronic isolation valve 7 of master in parallel and the electronic isolation valve 8 of bypass between atmospheric dump valve 1 and pressurized air surge tank N23-N24, N25-N26.Under off working state, main electronic isolation valve 7 and the electronic isolation valve 8 of bypass be in normal off status, do not needing the airborne release valve events after from gas supply line.Main electronic isolation valve 7 and the electronic isolation valve 8 of bypass be take and guaranteed in the situation that to lose a row power supply can be also the atmospheric dump valve air feed by different power supply series power supplies.In addition, under accident conditions, also can be powered by the emergency diesel-oil machine.
The upstream of main electronic isolation valve 7 and the electronic isolation valve 8 of bypass is provided with a manual air feed isolation valve 9, and when in electronic isolation valve group, a deck valve door fault is opened, but manual-lock air feed isolation valve is to guarantee the isolation of gas supply line; Main electronic isolation valve 7 and the electronic isolation valve of bypass 8 downstreams are provided with non-return valve 10.
Shown in Fig. 2 a and Fig. 2 b, many gas exhaust duct N14-N15, N14-N16 can be connected with main steam line by an ozzle, the tie point that N8 and N9 are ozzle; Shown in Fig. 2 c and Fig. 2 d, every gas exhaust duct N10-N22, N11-N21, N12-N17 and N13-N18 can be connected with main steam line by ozzle separately, the tie point that N10, N11, N12 and N13 are ozzle.In actual applications, take above-mentioned any connected mode all can.
Shown in Fig. 2 a and Fig. 2 d, many gas exhaust ducts are independent discharge separately, shown in node N15, N16, N17 and N18; Shown in Fig. 2 b and Fig. 2 c, many gas exhaust ducts also can converge into a total tube drainage, shown in node N20 and N22.In actual applications, adopt any discharging modes all can.
The airborne release system of the utility model nuclear power plant is not limited to above-mentioned embodiment, and those skilled in the art draw other embodiment according to the technical solution of the utility model, belongs to equally technological innovation scope of the present utility model.
Claims (10)
1. the airborne release system of a nuclear power plant, comprise at least two gas exhaust ducts, it is characterized in that: described gas exhaust duct is arranged on main steam line, every described gas exhaust duct is provided with atmospheric dump valve (1), the upstream of described atmospheric dump valve (1) is provided with isolation valve (2), the downstream of described atmospheric dump valve (1) is provided with drain water piping, and the end of described drain water piping connects drain trap.
2. the airborne release system of nuclear power plant as claimed in claim 1 is characterized in that: many described gas exhaust ducts are connected with main steam line by an ozzle.
3. the airborne release system of nuclear power plant as claimed in claim 1 is characterized in that: the described gas exhaust duct ozzle by separately respectively is connected with main steam line.
4. the airborne release system of nuclear power plant as claimed in claim 2 or claim 3, it is characterized in that: described gas exhaust duct independently arranges separately.
5. the airborne release system of nuclear power plant as claimed in claim 2 or claim 3, it is characterized in that: many described gas exhaust duct ends are connected with a house steward.
6. the airborne release system of nuclear power plant as claimed in claim 1, it is characterized in that: every described drain water piping is provided with flow-through orifice (3).
7. the airborne release system of nuclear power plant as claimed in claim 1, it is characterized in that: described atmospheric dump valve (1) is the pneumatic control valve of Long-distance Control, by gas supply line, with compressed air system (5), is connected.
8. the airborne release system of nuclear power plant as claimed in claim 7, it is characterized in that: described gas supply line is provided with bailout gas (6), between described atmospheric dump valve (1) and bailout gas (6), is provided with the electronic isolation valve of master in parallel (7) and the electronic isolation valve of bypass (8).
9. the airborne release system of nuclear power plant as claimed in claim 8, is characterized in that: also be provided with manual air feed isolation valve (9) on described gas supply line.
10. the airborne release system of nuclear power plant as claimed in claim 1, it is characterized in that: the end of every described exhaust line is provided with exhaust box (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203063037U CN203366759U (en) | 2013-05-30 | 2013-05-30 | Atmospheric emission system of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203063037U CN203366759U (en) | 2013-05-30 | 2013-05-30 | Atmospheric emission system of nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203366759U true CN203366759U (en) | 2013-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203063037U Expired - Lifetime CN203366759U (en) | 2013-05-30 | 2013-05-30 | Atmospheric emission system of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203366759U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409112A (en) * | 2014-12-03 | 2015-03-11 | 中国核动力研究设计院 | Containment recycling system |
| CN104934085A (en) * | 2015-04-03 | 2015-09-23 | 中国核电工程有限公司 | Gaseous pathway discharge system used for nuclear power plant liquid effluent discharge |
| CN107068214A (en) * | 2017-05-09 | 2017-08-18 | 中广核研究院有限公司 | Nuclear power plant steam air tapping equipment and secondary circuit pressure method for releasing |
| WO2020113505A1 (en) * | 2018-12-05 | 2020-06-11 | 深圳中广核工程设计有限公司 | Safety-level functional control system and method for steam atmospheric emissions system of nuclear power plant |
| WO2024000985A1 (en) * | 2022-06-30 | 2024-01-04 | 中国核电工程有限公司 | Stepwise pressure relief device and steam generator secondary-loop heat sink system |
-
2013
- 2013-05-30 CN CN2013203063037U patent/CN203366759U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409112A (en) * | 2014-12-03 | 2015-03-11 | 中国核动力研究设计院 | Containment recycling system |
| CN104409112B (en) * | 2014-12-03 | 2017-07-04 | 中国核动力研究设计院 | Containment recirculating system |
| CN104934085A (en) * | 2015-04-03 | 2015-09-23 | 中国核电工程有限公司 | Gaseous pathway discharge system used for nuclear power plant liquid effluent discharge |
| CN107068214A (en) * | 2017-05-09 | 2017-08-18 | 中广核研究院有限公司 | Nuclear power plant steam air tapping equipment and secondary circuit pressure method for releasing |
| CN107068214B (en) * | 2017-05-09 | 2024-03-26 | 中广核研究院有限公司 | Nuclear power plant steam atmosphere discharge device and two-loop pressure release method |
| WO2020113505A1 (en) * | 2018-12-05 | 2020-06-11 | 深圳中广核工程设计有限公司 | Safety-level functional control system and method for steam atmospheric emissions system of nuclear power plant |
| EP3904640A4 (en) * | 2018-12-05 | 2022-12-07 | China Nuclear Power Design Company Ltd. (Shenzhen) | Safety-level functional control system and method for steam atmospheric emissions system of nuclear power plant |
| WO2024000985A1 (en) * | 2022-06-30 | 2024-01-04 | 中国核电工程有限公司 | Stepwise pressure relief device and steam generator secondary-loop heat sink system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |