CN109273118B - Method and system for measuring temperature of primary loop coolant - Google Patents
Method and system for measuring temperature of primary loop coolant Download PDFInfo
- Publication number
- CN109273118B CN109273118B CN201810891871.5A CN201810891871A CN109273118B CN 109273118 B CN109273118 B CN 109273118B CN 201810891871 A CN201810891871 A CN 201810891871A CN 109273118 B CN109273118 B CN 109273118B
- Authority
- CN
- China
- Prior art keywords
- temperature
- coolant
- measuring
- cold
- steam generator
- Prior art date
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/02—Devices or arrangements for monitoring coolant or moderator
- G21C17/022—Devices or arrangements for monitoring coolant or moderator for monitoring liquid coolants or moderators
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/017—Inspection or maintenance of pipe-lines or tubes in nuclear installations
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention provides a method and a system for measuring the temperature of a primary loop coolant, wherein the method comprises the steps of obtaining the temperature of a cold section transition section measuring point of the primary loop coolant, wherein the cold section transition section measuring point is arranged on a lower cavity annular flow passage between a lower cylinder of a steam generator and a spiral heat transfer pipe assembly of the steam generator; acquiring the temperature difference caused by the heating of the coolant in an annular cavity at the upper part of the pressure vessel and the temperature increased by the coolant flowing through a main pump bearing; and calculating to obtain the temperature of the cold section of the primary loop coolant according to the temperature, the temperature difference and the increased temperature at the measuring point of the cold section transition section. According to the invention, the temperature measuring pipe connecting nozzle is arranged on the internal flow channel of the direct current steam generator, the fast response thermal resistance thermometer with the protective sleeve is inserted into the pipe connecting nozzle to measure the temperature of the coolant in a primary loop, so that the problem that a compact small-sized stack has no measuring point arranged on a main pipe section is solved, and the problem that the insertion depth cannot be met due to the wide flow channel and the short length of the thermometer is solved.
Description
Technical Field
The invention relates to the technical field of nuclear power instrument control and equipment, in particular to a method and a system for measuring coolant and temperature of a primary loop.
Background
In a pressurized water reactor nuclear power plant, the temperature of the reactor coolant represents the temperature of a reactor primary circuit, is an important process measurement parameter for a reactor protection system, and can directly trigger shutdown protection when the temperature of the coolant is too high or too low.
The temperature measurement of the reactor coolant of the existing commercial large pressurized water reactor nuclear power plant is carried out on a primary loop main pipe section (as shown in figure 7), and because the small reactor adopts a compact design, the pressure vessel, a steam generator and a main pump are connected by short sleeves, the connection design on the large reactor loop is not provided, and the small reactor short sleeve cannot be provided with a hole for arranging a sensor. It is therefore desirable to provide a method and apparatus for measuring the temperature of the primary coolant.
Disclosure of Invention
The invention aims to solve the technical problem that the wall of a cylinder body of a direct current steam generator is too thick and the insertion depth of a thermal resistance thermometer is insufficient is solved by transferring the temperature measurement of a primary loop coolant to the end of the direct current steam generator for measurement, arranging a nozzle on a flow channel of the cylinder body of the steam generator and a spiral heat transfer pipe assembly of the steam generator and inserting a temperature measuring meter into the nozzle.
In order to solve the technical problem, the invention provides a method for measuring the temperature of a coolant in a primary loop of a reactor, which comprises the following steps:
acquiring the temperature of a cold section transition section measuring point of the primary loop coolant, wherein the cold section transition section measuring point is arranged on an annular flow passage of a lower chamber between a lower cylinder of the steam generator and a spiral heat transfer pipe assembly of the steam generator;
acquiring the temperature difference caused by the heating of the coolant in an annular cavity at the upper part of the pressure vessel and the temperature increased by the coolant flowing through a main pump bearing;
and calculating to obtain the temperature of the cold section of the primary loop coolant according to the temperature, the temperature difference and the increased temperature at the measuring point of the cold section transition section.
Wherein calculating the primary loop coolant cold leg temperature from the temperature, the temperature difference, and the increased temperature at the cold leg transition section measurement point specifically comprises calculating the primary loop coolant cold leg temperature using the following equation:
T cold ＝ΔT Cooling by cooling -ΔT Ring (C) +ΔT Main pump
Wherein, T Cold Is the primary loop coolant cold leg temperature, Δ T Cold Is the temperature, Δ T, at the point of measurement of the cold leg transition Ring (C) Temperature difference, Δ T, brought about by the coolant heating up in the upper ring space of the pressure vessel Main pump The increased temperature of the coolant flowing through the main pump bearings. Wherein the method further comprises:
and acquiring the temperature of a hot section temperature measuring point of the primary loop coolant, wherein the hot section temperature measuring point is arranged on an upper cavity annular flow channel between the upper cylinder of the steam generator and the spiral heat transfer pipe assembly of the steam generator.
The invention also provides a system for measuring the temperature of a coolant in a primary loop of a reactor, comprising:
the first measuring device is used for measuring the temperature of a cold section transition section measuring point of the primary loop coolant, wherein the cold section temperature measuring point is arranged on an annular flow passage of a lower chamber between a lower cylinder of the steam generator and a spiral heat transfer pipe assembly of the steam generator;
the second measuring device is used for measuring the temperature difference caused by the heating of the coolant flowing through the upper annular cavity of the pressure vessel;
third measuring means for measuring the temperature increase of the coolant flowing through the main pump bearing;
and the calculating unit is used for calculating and obtaining the temperature of the cold section of the primary loop coolant according to the temperature, the temperature difference and the increased temperature at the measuring point of the cold section transition section.
The system further comprises a fourth measuring device, wherein the fourth measuring device is used for measuring the temperature of a hot section temperature measuring point of the primary loop coolant, and the hot section temperature measuring point is arranged on an upper cavity annular flow passage between the upper cylinder of the steam generator and the spiral heat transfer pipe assembly of the steam generator.
Wherein the first measuring device comprises:
the first pipe connecting nozzle is fixed on the outer wall of the lower barrel of the steam generator and is positioned on the annular flow channel of the lower chamber;
and the first temperature measuring sensor is positioned in the first filler neck and used for measuring the temperature of the cold section transition section measuring point of the primary loop coolant.
Wherein the fourth measuring device comprises:
the second filler neck is fixed on the outer wall of the upper barrel of the steam generator and is positioned on the annular flow channel of the upper chamber;
and the second temperature measuring sensor is positioned in the second filler neck and used for measuring the temperature of the hot section temperature measuring point of the primary loop coolant.
Wherein the first filler neck comprises:
the cooling device comprises a first temperature measurement protection connecting pipe, wherein one end of the first temperature measurement protection connecting pipe is a closed end, the other end of the first temperature measurement protection connecting pipe is an open end, the open end of the first temperature measurement protection connecting pipe is fixed on the outer wall of a lower cylinder of the steam generator, a plurality of cooling agent inflow holes are formed in the pipe wall of the first temperature measurement protection connecting pipe in the cooling agent inflow direction, and cooling agent outflow holes are formed in the pipe wall of the first temperature measurement protection connecting pipe in the cooling agent outflow direction.
Wherein the second filler neck comprises:
and one end of the second temperature measurement protection connecting pipe is a closed end, the other end of the second temperature measurement protection connecting pipe is an open end, the open end is fixed on the outer wall of the upper barrel of the steam generator, a plurality of coolant inflow holes are formed in the pipe wall of the second temperature measurement protection connecting pipe in the coolant inflow direction, and coolant outflow holes are formed in the pipe wall of the second temperature measurement protection connecting pipe in the coolant outflow direction.
Wherein the depth of the first filler neck and the second filler neck inserted into the annular flow passage is between 1/3 and 1/2 of the pipe diameter of the annular flow passage.
The implementation of the invention has the following beneficial effects: the temperature measurement of the primary loop coolant is transferred to the end of the direct current steam generator for measurement, the pipe connecting nozzle is arranged on the flow channel of the steam generator cylinder and the steam generator spiral heat transfer pipe assembly, the temperature measuring meter is inserted into the pipe connecting nozzle, and the temperature of the hot section and the temperature of the cold section of the coolant are obtained through measurement and calculation, so that the problems that the cylinder wall of the direct current steam generator is too thick and the insertion depth of a thermal resistance thermometer is insufficient are solved, and the measurement requirement of compact arrangement of a small pile is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method of measuring the temperature of the cold leg of a primary loop coolant in a reactor according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a system for measuring the temperature of a cold leg of a coolant in a primary loop of a reactor according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the arrangement of the primary circuit coolant temperature measurement points on the steam generator according to the embodiment of the present invention;
FIG. 4 is a cross-sectional top view of coolant hot leg temperature measurement points on a steam generator according to an embodiment of the present invention;
FIG. 5 is a schematic view of a temperature measuring filler neck on an annular flow passage of a chamber in accordance with an embodiment of the present invention;
FIG. 6 is a schematic flow path of coolant for a compact mini-stack according to an embodiment of the present invention;
fig. 7 is a schematic view of a flow path of a coolant for a large pressurized water reactor in the prior art.
Detailed Description
The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced.
Referring to fig. 1, an embodiment of the present invention provides a method for measuring a temperature of a cold leg of a primary loop coolant, including the steps of:
and S101, obtaining the temperature of a cold section transition section measuring point of the primary loop coolant, wherein the cold section transition section measuring point is arranged on an annular flow channel of a lower cavity between a lower cylinder of a steam generator and a spiral heat transfer pipe assembly of the steam generator.
Step S102, acquiring the temperature difference caused by heating of the coolant flowing through an upper annular cavity of the pressure vessel and the temperature increased by the coolant flowing through a main pump bearing;
and step S103, calculating to obtain the temperature of the cold section of the primary loop coolant according to the temperature, the temperature difference and the increased temperature of the measuring point of the cold section transition section.
Specifically, the loop coolant cold leg temperature is calculated using the following equation:
T cold ＝ΔT Cold -ΔT Ring (C) +ΔT Main pump
Wherein, T Cold Is the primary loop coolant cold leg temperature, Δ T Cooling by cooling For the temperature, Δ T, of the measuring point of the cold section transition section Ring (C) Temperature difference, Δ T, caused by heating of said coolant flowing through the upper annular chamber of the pressure vessel Main pump The increased temperature of the coolant flowing through the main pump bearings.
It should be noted that, in this embodiment, the sequence numbers S101 and S102 are only used to distinguish different step contents, and the sequence numbers are not used to limit the sequence of the steps S101 and S102, that is, in this embodiment, S101 or S102 may be executed first, or S101 and S102 may be executed synchronously.
In the temperature measurement of the primary circuit coolant, it is also necessary to obtain the hot leg temperature of the coolant, and thus the method further comprises:
and acquiring the temperature of a hot section temperature measuring point of the primary loop coolant, wherein the hot section temperature measuring point is arranged on an upper cavity annular flow passage between the upper cylinder of the steam generator and the spiral heat transfer pipe assembly of the steam generator.
Specifically, the hot section temperature measuring points are arranged on 90-degree and 270-degree direction positions of a top-view cross section of an upper cavity annular flow passage between an upper cylinder of the steam generator and a steam generator spiral heat transfer pipe assembly, wherein the 0-degree position of the top-view cross section of the annular flow passage is an inflow opening position or an outflow opening position of the coolant.
In the embodiment, the temperature measuring pipe connecting nozzle is designed in the internal flow channel of the direct current steam generator, and the fast response thermal resistance thermometer with the protective sleeve is inserted into the pipe connecting nozzle to measure the temperature of the coolant in a primary loop, so that the problem that a compact small-sized stack is provided with measuring points due to no main pipe section, and the problem that the insertion depth cannot be met due to the wide flow channel and the short length of the thermometer is solved.
Based on the first embodiment of the present invention, there is provided a system for measuring the temperature of the cold leg of a primary loop coolant, as shown in fig. 2, the system comprising:
the first measuring device 1 is used for measuring the temperature of a cold section transition section measuring point of the primary loop coolant, wherein the cold section transition section measuring point is arranged on an annular flow passage of a lower chamber between a lower cylinder of a steam generator and a spiral heat transfer pipe assembly of the steam generator;
a second measuring device 2 for measuring the temperature difference caused by the heating of the coolant flowing through the upper annular chamber of the pressure vessel;
third measuring means 3 for measuring the temperature increase of the coolant flowing through the main pump bearing;
and the calculating unit 4 is used for calculating and obtaining the temperature of the cold section of the primary loop coolant according to the temperature, the temperature difference and the increased temperature at the measuring point of the cold section transition section.
The system further comprises a fourth measuring device, wherein the fourth measuring device is used for measuring the temperature of a hot section temperature measuring point of the primary loop coolant, and the hot section temperature measuring point is arranged on an upper cavity annular flow passage between the upper cylinder of the steam generator and the spiral heat transfer pipe assembly of the steam generator.
Specifically, the first measurement device includes:
the first pipe connecting nozzle is fixed on the outer wall of the lower barrel of the steam generator and is positioned on the annular flow channel of the lower chamber;
and the first temperature measuring sensor is positioned in the first filler neck and used for measuring the temperature of the cold section transition section measuring point of the primary loop coolant.
More specifically, the first filler neck comprises:
the temperature measuring protection connecting pipe comprises a first temperature measuring protection connecting pipe, wherein one end of the first temperature measuring protection connecting pipe is a closed end, the other end of the first temperature measuring protection connecting pipe is an open end, a stirring pipe is formed inside the first temperature measuring protection connecting pipe, the open end of the first temperature measuring protection connecting pipe is fixed on the outer wall of the lower cylinder of the steam generator, a plurality of coolant inflow holes are formed in the pipe wall of the first temperature measuring protection connecting pipe in the coolant inflow direction, and coolant outflow holes are formed in the pipe wall of the first temperature measuring protection connecting pipe in the coolant outflow direction.
The first temperature measuring sensor is a fast response thermal resistance thermometer with a sleeve.
In order to make the measured temperature as uniform as possible, the probe of the first temperature measuring sensor should be arranged in the coolant outflow direction.
Since the temperature probe measures the temperature of the coolant, the desired insertion depth is 1/2 to 1/3 of the diameter of the flow channel, so that the temperature measuring sensor in the filler neck can measure the temperature of the coolant at the flow channel diameters 1/2 to 1/3, the filler neck should be inserted to a depth between the flow channels 1/2 to 1/3.
Through designing the structure of the filler pipe nozzle, the opening end of the filler pipe nozzle is fixed on the outer wall of the cylinder body at the lower part, the filler pipe nozzle is inserted into the annular flow channel, a plurality of openings are arranged in the flowing direction of the coolant of the protection connecting pipe, the coolant is introduced into the first temperature measurement protection connecting pipe to be stirred, and the temperature measuring sensor is arranged in the direction of the outlet of the coolant, so that the temperature measurement of a measuring point at the transition section of the cold section of the coolant is realized.
Wherein the second filler neck has the same structure as the first filler neck and will not be described here.
The measurement method will be described below by way of example with reference to fig. 3 to 7.
As shown in fig. 3, the primary circuit coolant is hot-stagedThe temperature measuring point is arranged on an upper cavity annular flow passage 13 between the upper cylinder body 11 of the steam generator and the spiral heat transfer pipe assembly 12 of the steam generator, and the measured temperature is T Heat generation ；
The measuring point of the cold section transition section is arranged on the annular flow passage 23 of the lower chamber between the lower cylinder 21 of the steam generator and the spiral heat transfer pipe assembly 12 of the steam generator, and the measured temperature is set as delta T Cold ；
After the coolant enters the once-through steam generator, thermal analysis of a temperature flow field shows that the temperature of the hot section of the coolant at the positions of the annular flow channel sections 90 and 270 of the upper chamber between the upper cylinder 11 of the once-through steam generator and the spiral heat transfer tube assembly 12 of the steam generator is stirred uniformly, and the temperature flow field is stable, so that the hot section temperature detectors of the coolant are arranged at the two positions, specifically as shown in fig. 4, the 0-degree position of the annular flow channel section is located at the inlet and the outlet of the coolant. The height of the distributed measuring point from the cross section of the inlet and the outlet of the direct current steam generator is determined by thermal analysis of a coolant temperature flow field in the actual direct current steam generator.
Because the cylinder wall of the direct current steam generator is too thick, the insertion depth of the thermal resistance thermometer is insufficient, and therefore, the pipe temperature measuring filler neck is adopted. As shown in fig. 5, the filler neck is fixed to an outer wall 31 of a tub of a steam generator, and includes: the first temperature measurement protection connecting pipe 34 is a tubular structure with one closed end, the open end of the first temperature measurement protection connecting pipe 34 is fixed on the outer wall 31 of the cylinder, a plurality of coolant inflow holes are formed in the pipe wall of the first temperature measurement protection connecting pipe 34 in the coolant inflow direction, the coolant inflow holes comprise a first coolant inlet 36, a second coolant inlet 37 and a third coolant inlet 38, and the coolant is introduced into the stirring space of the temperature measurement protection connecting pipe through the arrangement of the coolant inflow holes, so that the stirring of the coolant on different layers is realized. The pipe wall of the first temperature measurement protection connecting pipe 34 in the coolant flowing direction is provided with a coolant outlet 32. The inner wall of the first temperature-measuring protection connecting pipe 34 is an agitating pipe 35 with the same diameter, and the diameter of the outer wall of the first temperature-measuring protection connecting pipe tends to increase from the closed end to the open end. The temperature detector 33 is fixed on the outer wall of the barrel of the steam generator and is positioned in the muddy pipe 35. Wherein the dashed line 39 is located at the central axis of the annular flow passage of the steam generator chamber.
The structure is used on the annular flow channel of the chamber, the insertion depth of the pipe connecting nozzle is 1/2-1/3 of the diameter of the flow channel, three coolant water inlets are formed in different layers of the annular flow channel of the chamber, the coolants in different layers flow out from the coolant water outlets after being stirred and mixed in the coolant stirring pipe 35, and the insertion depth of the temperature detector 33 is at the position of the water outlets. The temperature measured by the thermal resistance detector is the temperature of the turbid coolant, the measured temperature is uniform and representative, and the impact of the coolant fluid on the thermometer can be prevented by adopting the nozzle design.
According to the flow path diagram of the coolant, as shown in fig. 6, since the insulating layer is provided on the short sleeve, the heat loss of the coolant through the short sleeve can be ignored, and the temperature of the hot section measured on the annular flow path of the upper chamber between the upper cylinder of the steam generator 41 and the spiral heat transfer pipe assembly of the steam generator, that is, the temperature T of the hot section of the primary loop coolant of the mini-stack, can be ignored Heat generation ；
Since the coolant from the primary circuit is pumped back into the pressure vessel 42 after passing through the steam generator 41, the short sleeve 44 on the right, the upper ring chamber of the pressure vessel 42, the short sleeve 45 on the left, and the main pump 43, the coolant from the steam generator 41 is heated in the ring chamber of the pressure vessel 42, causing the temperature of the coolant to rise, setting the temperature change at Δ T Ring (C) After flowing through the main pump 43, the main pump 43 bearings heat the coolant, causing it to increase in heat (coolant for a large pressurized water reactor also heats up through the main pump), setting the increased temperature at Main pump The other part of the coolant cold section is provided with an insulating layer, so that the temperature change of the other sections is ignored, and through comparison of a flow chart 6 of the coolant of the small-sized reactor and a flow chart 7 of the coolant of the large-sized pressurized water reactor, the cold section temperature flow passage of the small-sized reactor is found to be more than one pressure container annular cavity, so that the temperature difference caused by heating flowing through the annular cavity is eliminated, and the cold section temperature T of the coolant of the primary circuit of the small-sized reactor is Cold ＝ΔT Cold -ΔT Ring (C) +ΔT Main pump 。
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (9)
1. A method of measuring a temperature of a primary loop coolant, comprising the steps of:
acquiring the temperature of a cold section transition section measuring point of the primary loop coolant, wherein the cold section transition section measuring point is arranged on a lower cavity annular flow passage between a lower cylinder of the steam generator and a heat transfer pipe assembly of the steam generator;
acquiring the temperature difference caused by the heating of the coolant flowing through the upper annular cavity of the pressure vessel and the temperature increased by the coolant flowing through the main pump bearing;
and calculating to obtain the temperature of the cold section of the primary loop coolant according to the temperature, the temperature difference and the increased temperature at the measuring point of the cold section transition section, wherein the method specifically comprises the following steps:
T cold ＝ΔT Cold -ΔT Ring (C) +ΔT Main pump
Wherein, T Cold Is the primary loop coolant cold leg temperature, Δ T Cooling by cooling Is the temperature, Δ T, at the point of measurement of the cold leg transition Ring (C) Temperature difference, Δ T, brought about by the coolant heating up in the upper ring space of the pressure vessel Main pump The increased temperature of the coolant flowing through the main pump bearings.
2. The method of claim 1, further comprising:
and acquiring the temperature of a hot section temperature measuring point of the primary loop coolant, wherein the hot section temperature measuring point is arranged on an upper cavity annular flow channel between the upper cylinder of the steam generator and the spiral heat transfer pipe assembly of the steam generator.
3. A system for measuring a temperature of a primary coolant, comprising:
the first measuring device is used for measuring the temperature of a cold section transition section measuring point of the primary loop coolant, wherein the cold section transition section measuring point is arranged on an annular flow passage of a lower chamber between a lower cylinder of the steam generator and a spiral heat transfer pipe assembly of the steam generator;
the second measuring device is used for measuring the temperature difference caused by the heating of the coolant flowing through the upper annular cavity of the pressure vessel;
third measuring means for measuring the temperature increase of the coolant flowing through the main pump bearing;
the calculating unit is used for calculating and obtaining the temperature of the cold section of the primary loop coolant according to the temperature, the temperature difference and the increased temperature at the measuring point of the cold section transition section, and specifically comprises the following steps:
T cold ＝ΔT Cold -ΔT Ring (C) +ΔT Main pump
Wherein, T Cold Is the primary loop coolant cold leg temperature, Δ T Cold Is the temperature, Δ T, at the point of measurement of the cold leg transition Ring (C) Temperature difference, Δ T, caused by heating of said coolant flowing through the upper annular chamber of the pressure vessel Main pump The increased temperature of the coolant flowing through the main pump bearings.
4. The system of claim 3, wherein:
the system also comprises a fourth measuring device, wherein the fourth measuring device is used for measuring the temperature of a hot section temperature measuring point of the primary loop coolant, and the hot section temperature measuring point is arranged on an upper cavity annular flow passage between the upper cylinder of the steam generator and the spiral heat transfer pipe assembly of the steam generator.
5. The system of claim 4, wherein the first measuring device comprises:
the first pipe connecting nozzle is fixed on the outer wall of the lower barrel of the steam generator and is positioned on the annular flow channel of the lower chamber;
and the first temperature measuring sensor is positioned in the first filler neck and used for measuring the temperature of the cold section transition section measuring point of the primary loop coolant.
6. The system of claim 5, wherein the fourth measuring device comprises:
the second filler neck is fixed on the outer wall of the upper barrel of the steam generator and is positioned on the annular flow channel of the upper chamber;
and the second temperature measuring sensor is positioned in the second filler neck and used for measuring the temperature of the hot section temperature measuring point of the primary loop coolant.
7. The system of claim 6, wherein the first filler neck comprises:
the temperature measuring protection connecting pipe comprises a first temperature measuring protection connecting pipe, wherein one end of the first temperature measuring protection connecting pipe is a closed end, the other end of the first temperature measuring protection connecting pipe is an open end, the open end of the first temperature measuring protection connecting pipe is fixed on the outer wall of the lower barrel of the steam generator, a plurality of coolant inflow holes are formed in the pipe wall of the first temperature measuring protection connecting pipe in the coolant inflow direction, and coolant outflow holes are formed in the pipe wall of the first temperature measuring protection connecting pipe in the coolant outflow direction.
8. The system of claim 7, wherein the second filler neck comprises:
and one end of the second temperature measurement protection connecting pipe is a closed end, the other end of the second temperature measurement protection connecting pipe is an open end, the open end of the second temperature measurement protection connecting pipe is fixed on the outer wall of the upper barrel of the steam generator, a plurality of coolant inflow holes are formed in the pipe wall of the second temperature measurement protection connecting pipe in the coolant inflow direction, and coolant outflow holes are formed in the pipe wall of the second temperature measurement protection connecting pipe in the coolant outflow direction.
9. The system of claim 8, wherein:
the depth of the first filler neck and the second filler neck inserted into the annular flow channel is 1/3-1/2 of the pipe diameter of the annular flow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810891871.5A CN109273118B (en) | 2018-08-07 | 2018-08-07 | Method and system for measuring temperature of primary loop coolant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810891871.5A CN109273118B (en) | 2018-08-07 | 2018-08-07 | Method and system for measuring temperature of primary loop coolant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109273118A CN109273118A (en) | 2019-01-25 |
| CN109273118B true CN109273118B (en) | 2022-09-16 |
Family
ID=65153436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810891871.5A Active CN109273118B (en) | 2018-08-07 | 2018-08-07 | Method and system for measuring temperature of primary loop coolant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109273118B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2083005C1 (en) * | 1992-08-06 | 1997-06-27 | Научно-инженерный центр "СНИИП" | Method for controlling primary circuit temperature conditions at nuclear power plants with vver reactors |
| CN203024879U (en) * | 2012-12-13 | 2013-06-26 | 中国核动力研究设计院 | Temperature measurement filler neck for main pipes |
| CN103306967B (en) * | 2013-07-08 | 2015-09-16 | 哈尔滨电气动力装备有限公司 | 300MW reactor coolant pump measuring system |
| CN106816190B (en) * | 2015-12-02 | 2018-09-25 | 中广核工程有限公司 | Nuclear power plant reactor main pipeline coolant temperature measuring system and method |
| CN206505725U (en) * | 2017-01-20 | 2017-09-19 | 中广核研究院有限公司 | Compact pressurized water reactor |
-
2018
- 2018-08-07 CN CN201810891871.5A patent/CN109273118B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109273118A (en) | 2019-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100422655C (en) | Rapid response electric heat exchanger | |
| Grishchenko et al. | The TALL-3D facility design and commissioning tests for validation of coupled STH and CFD codes | |
| CN102059163B (en) | Liquid thermostat tank without stirrer | |
| CN106816190B (en) | Nuclear power plant reactor main pipeline coolant temperature measuring system and method | |
| Meyer et al. | Inlet tube spacing and protrusion inlet effects on multiple circular tubes in the laminar, transitional and turbulent flow regimes | |
| CN109238490B (en) | Temperature measuring method for small-diameter rod cluster assembly under motion condition | |
| JP5215750B2 (en) | Sensor, liquid film measuring device | |
| CN109273118B (en) | Method and system for measuring temperature of primary loop coolant | |
| CN102507640A (en) | Shear rate-variable liquid heat transfer coefficient measuring device and method | |
| Huang et al. | Heat transfer characteristics of supercritical water in a horizontal tube considering local temperature fields: An experimental study | |
| CN113030155B (en) | Experimental system for researching flow solidification behavior of lead and bismuth | |
| Kumar et al. | Heat transfer distribution and pressure fluctuations during flow boiling in a pipe with different orientations | |
| KR20180114959A (en) | Reactor Coolant System Piping Temperature Distribution Measurement System | |
| CN106940230A (en) | A kind of total temperature measurement probe in nine holes | |
| CN108105749A (en) | Working medium flow On-line Measuring Method and system in a kind of water screen tube | |
| Gökkaya et al. | Experimental investigation on heat transfer characteristics of supercritical CO2 flowing upward and downward through a microtube at low Reynolds numbers | |
| CN110988023A (en) | Testing method of heat absorption type fuel heat sink | |
| CN110307949A (en) | A kind of labyrinth seal hydraulic experiment rack | |
| CN111128416A (en) | Visual thermal hydraulic experiment device and method for dead pipe section of nuclear power station | |
| CN203824677U (en) | Water-cooled heat flux sensor for engine thermal environment test | |
| CN105841917A (en) | Supersonic flow field total pressure measurement device and measurement method thereof | |
| CN109211966A (en) | A kind of annular fuel hot-fluid separating experiment device and method | |
| CN110988022B (en) | Sleeve type cooling water jacket structure and gravity assisted heat pipe detection device and detection method | |
| CN109211969B (en) | A kind of triaxial ellipsoid shape fusion pool heat transfer characteristic measurement experiment device | |
| Govinder et al. | External surface temperature measurements for the heat transfer analysis of internally heated cylindrical clad-tubes subjected to external forced convection bulk water coolant thermal-hydraulic conditions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |