CN105931686A - Pressurized water reactor primary circuit coolant zinc-adding device capable of automatically controlling zinc concentration - Google Patents

Pressurized water reactor primary circuit coolant zinc-adding device capable of automatically controlling zinc concentration Download PDF

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Publication number
CN105931686A
CN105931686A CN201610256491.5A CN201610256491A CN105931686A CN 105931686 A CN105931686 A CN 105931686A CN 201610256491 A CN201610256491 A CN 201610256491A CN 105931686 A CN105931686 A CN 105931686A
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CN
China
Prior art keywords
zinc
zincification
zinc concentration
water reactor
concentration
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.)
Pending
Application number
CN201610256491.5A
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Chinese (zh)
Inventor
胡勇
王辉
曹林园
海正银
田珏
辛长胜
彭德全
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China Institute of Atomic of Energy
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China Institute of Atomic of Energy
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Application filed by China Institute of Atomic of Energy filed Critical China Institute of Atomic of Energy
Priority to CN201610256491.5A priority Critical patent/CN105931686A/en
Publication of CN105931686A publication Critical patent/CN105931686A/en
Pending legal-status Critical Current

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    • 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
    • G21C17/0225—Chemical surface treatment, e.g. corrosion
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
    • G21C19/28—Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D3/00—Control of nuclear power plant
    • G21D3/08—Regulation of any parameters in the plant
    • 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
    • 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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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Control Of Non-Electrical Variables (AREA)

Abstract

The invention relates to a pressurized water reactor primary circuit coolant zinc-adding device capable of automatically controlling zinc concentration. The zinc-adding device comprises an on-line zinc concentration measuring unit, a programmable logic control unit (PLC), a regulating valve and a zinc injection pump, wherein the programmable logic control unit is respectively connected with the on-line zinc concentration measuring unit, the regulating valve and the zinc injection pump; and according to the data measured by the on-line zinc concentration measuring unit, the programmable logic control unit controls the regulating valve and the zinc injection pump in real time, and regulates the input rate of zinc. According to the invention, on the basis of real-time on-line measurement of the zinc concentration, the measured data of the zinc concentration is used as a feedback signal, and the input rate of zinc is automatically regulated. The automatic method using the device provided by the invention is simple, convenient and accurate, replaces a complicated and inaccurate manual control method, and does not need complex and unreliable parameter calculation to obtain the input rate of zinc.

Description

A kind of presurized water reactor primary Ioops coolant zincification device automatically controlling zinc concentration
Technical field
Present invention relates particularly to a kind of presurized water reactor primary Ioops coolant zincification device automatically controlling zinc concentration, Belong to PWR of Nuclear Power Station technical field.
Background technology
In order to reduce overhaul radiation dose and primary Ioops lateral stress corrosion cracking, pressurized-water reactor nuclear power plant is commonly used The water chemistry technology of note zinc.By 2013, the whole world had the pressurized-water reactor nuclear power plant of 30% have employed to add Zinc water chemistry technology, and the U.S. has the compacted clay liners of 59% to have employed this technology especially, and use and add The nuclear power generating sets of zinc water chemistry technology are annual also in continual and steady increase.Therefore, zincification technology has become pressure The hydrochemical development trend of water-water reactor nuclear power station.Research shows, zinc can displace primary Ioops equipment and materials oxide-film Some ion interior, reduces radiation dose rate so that the structure of primary Ioops oxide-film is finer and close, corrosion resistance Can strengthen.Adding zinc concentration general the lowest, the zincification directive/guide value that EPRI-Electric Power Research Institute issues recommends it dense Angle value is 5-40 μ g/L.At present, China introduces, digests, absorbs third generation AP1000 nuclear power technology, The collective dose that this unit design requires every unit annual is 0.671 people Sv, far below secondary nuclear power station 1.5 people Sv, wherein, use zincification water chemistry technology be reach this requirement technical way it One.
Its zinc concentration of zincification device that at present nuclear power plant uses needs Artificial Control, be limited by zinc concentration from Line measuring method, operator according to the zinc concentration value of off-line sampling and measuring, compared with desired value relatively after, then Regulation adds the flow of zinc solution.Owing in presurized water reactor primary Ioops, the wear rate of zinc is fluctuation and is difficult to determine , adsorbed by resin and material surface, depositing behavior is affected very big and different reactor, be before It is no that to add the difference that the factor such as zinc and operational factor causes the biggest, therefore, and this Artificial Control zinc concentration Zincification method, needs to measure frequently and regulate, inefficiency, also can not get the zinc concentration of accurate stable. The presurized water reactor primary Ioops zincification that Mitsubishi Heavy Industry Ltd.'s international application patent of invention CN102099869B describes Device is exactly the manually operated exemplary device of above-mentioned needs, needs manual adjustment injection pump or the flow of regulation valve. General Electric Co. Limited's international application patent of invention CN1313992A provides a kind of method calculating zincification speed, As aforementioned it is to be appreciated that the parameter of numerous influence factors could calculate, and due to the real-time change of zinc concentration, Reality is also difficult to.
Why the present invention can realize automatically controlling of zinc concentration, is based on China Atomic Energy Science Research Institute First realize the real-time online measuring of zinc concentration, this measurement technology previous application Chinese patent CN104535510A。
Summary of the invention
It is an object of the invention to provide a kind of presurized water reactor primary Ioops coolant automatically controlling zinc concentration to add Zinc device, on the basis of zinc concentration real-time online measuring, by zinc concentration measurement data as feedback signal, It is automatically adjusted zinc input rate.
Concrete, the invention provides a kind of presurized water reactor primary Ioops coolant automatically controlling zinc concentration and add Zinc device, described zincification device includes: online zinc concentration measurement apparatus, programmable logic control unit (PLC), regulation valve, note zinc pump；Wherein, described programmable logic control unit connect respectively described Line zinc concentration measurement apparatus, regulation valve and note zinc pump；According to the measurement data of online zinc concentration measurement apparatus, Described programmable logic control unit controls described regulation valve and note zinc pump in real time, regulates zinc input rate.
Further, the presurized water reactor primary Ioops coolant zincification dress of zinc concentration can be automatically controlled as above Putting, described online zinc concentration measurement apparatus is also connected with presurized water reactor primary Ioops, measures described presurized water reactor one in real time The zinc concentration data in loop.
Further, the presurized water reactor primary Ioops coolant zincification device of zinc concentration can be automatically controlled as above, Described note zinc pump is also respectively connected with described regulation valve and zinc solution case.
Further, the presurized water reactor primary Ioops coolant zincification device of zinc concentration can be automatically controlled as above, Described online zinc concentration measurement apparatus obtains described zinc concentration data in real time and inputs Programmable logical controller list Unit, compared with the zinc concentration desired value being previously set, adoption rate-Integrated Derivative (PID) algorithm obtains Zincification speed, further according to zincification solution concentration, calculates and adds zinc solution injection flow.
Further, the presurized water reactor primary Ioops coolant zincification device of zinc concentration can be automatically controlled as above, The described zinc solution that adds is injected the real-time input control valve of data signal of flow by described programmable logic control unit And note zinc pump, to control zincification speed in real time.
Further, the presurized water reactor primary Ioops coolant zincification dress of zinc concentration can be automatically controlled as above Putting, described data signal is digital signal or analogue signal.
Further, the presurized water reactor primary Ioops coolant zincification device of zinc concentration can be automatically controlled as above, The expression formula of described zincification speed is:
v Z n = - K p ( Δ c + 1 τ I ∫ Δ c · d τ + τ D d Δ c d τ )
vZnFor zincification speed, Δ c is real-time zinc concentration and the gap of desired value in loop, represents PID respectively The output of algorithm and input quantity；τ express time；Three adjustable JIESHEN corresponding with ratio, integration and differential Number is respectively as follows: Proportional coefficient Kp, integration time constant τI, derivative time constant τD。
Further, the presurized water reactor primary Ioops coolant zincification device of zinc concentration can be automatically controlled as above, The described zinc solution that adds injects flow=zincification speed/zincification solution concentration.
The automatic mode that the present invention uses is easy, accurate, will replace loaded down with trivial details and inaccurate Artificial Control Method, it is not required that insecure parameter calculates the input rate obtaining zinc by complexity.
Accompanying drawing explanation
Fig. 1 is that the structure of the presurized water reactor primary Ioops coolant zincification device that the present invention can automatically control zinc concentration is shown It is intended to.
Detailed description of the invention
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings.
As it is shown in figure 1, the presurized water reactor primary Ioops coolant zincification device of the automatically controlled zinc concentration of the present invention Mainly by online zinc concentration measurement apparatus 1, programmable logic control unit (PLC) 2, can be controlled by signal Regulation valve 3 forms with note zinc pump 4, and zincification position holds system 5 downstream, certain density zinc in primary Ioopsization Solution storage, in zinc solution case 6, enters primary Ioops 7 via note zinc pump 4, regulation valve 3 successively, notes zinc pump 4 with the flow of regulation valve 3 by PLC2 control, PLC2 receive online zinc concentration measurement apparatus 1 measurement data, The target zinc concentration data set and nuclear power plant's operational parameter data of other necessity, and follow procedure carries out logic Calculate.
First, online zinc concentration measures the Chinese patent using China Atomic Energy Science Research Institute the most to apply for CN104535510A spectrophotography.
Secondly, PLC is according to the primary Ioops zinc concentration data inputted in real time and the zinc concentration desired value phase being previously set Relatively calculating the most required zincification speed, when real-time zinc concentration data are less than desired value, more raising adds Zinc speed, during closer to desired value, reduces zincification speed, when exceeding desired value, tapers off zincification, but This calculating is not simple switch or in proportion, but adoption rate-Integrated Derivative (PID) algorithm, To obtain stable data variation, reduce advanced or hysteresis.The expression formula of zincification speed is:
v Z n = - K p ( Δ c + 1 τ I ∫ Δ c · d τ + τ D d Δ c d τ )
vZnFor zincification speed, Δ c is real-time zinc concentration and the gap of desired value in loop, represents PID respectively The output of algorithm and input quantity；τ express time；Three adjustable JIESHEN corresponding with ratio, integration and differential Number is respectively as follows: Proportional coefficient Kp, integration time constant τI, derivative time constant τD。KpRepresent zincification speed vZnBe directly proportional to concentration deviation delta c, i.e. deviation is the biggest, and zincification speed is the fastest；Integral adjustment not only with deviation Size is relevant, also relevant with the time that deviation exists, τIThe least, vZnChange over the fastest；τDExpression adds Zinc speed vZnProportional with deviation speed over time.Kp、τIAnd τDThe determination of these three parameter Adjusting in needs scene, i.e. regulates the effect characteristics of loop zinc concentration according to on-the-spot zincification speed, although whole Determine process to be completed by Automatic Program, but for the sake of insurance, or recommend to use manual adjustment, i.e. basis The change curve of on-the-spot zinc concentration, from the different adjustment effect of above three parameter, Approach by inchmeal is optimal Value.
Zincification speed v obtainedZn(g/h) after, further according to zincification mother liquid concentration Cm(g/L), calculate and add Zinc mother solution injects flow Q (=vZn/Cm, L/h), it is the most defeated that PLC will add zinc solution injection data on flows signal Enter to regulate valve and note zinc pump, to control zincification speed in real time.
Finally, signal the regulation valve controlled and note zinc pump, digital signal or analogue signal (standard can be received Voltage or electric current), according to PLC set-point, regulation note zinc flow quantity in real time, so that presurized water reactor primary Ioops is cold But agent adds zinc concentration and is controlled automatically at desired value.
Present invention achieves presurized water reactor primary Ioops coolant and add automatically controlling of zinc concentration, improve accuracy and Efficiency, simplifies operation.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention The spirit and scope of invention.So, if these amendments and modification to the present invention belong to right of the present invention Require and within the scope of equivalent technology, then the present invention is also intended to comprise these change and modification.

Claims (8)

1. can automatically control a presurized water reactor primary Ioops coolant zincification device for zinc concentration, its feature exists In:
Described zincification device includes: online zinc concentration measurement apparatus, programmable logic control unit (PLC), Regulation valve, note zinc pump；
Wherein, described programmable logic control unit connects described online zinc concentration measurement apparatus, regulation respectively Valve and note zinc pump；According to the measurement data of online zinc concentration measurement apparatus, described programmable logic control unit Control described regulation valve and note zinc pump in real time, regulate zinc input rate.
The presurized water reactor primary Ioops coolant zincification of zinc concentration can be automatically controlled the most as claimed in claim 1 Device, it is characterised in that:
Described online zinc concentration measurement apparatus is also connected with presurized water reactor primary Ioops, measures described presurized water reactor one time in real time The zinc concentration data on road.
The presurized water reactor primary Ioops coolant of zinc concentration can be automatically controlled the most as claimed in claim 1 or 2 Zincification device, it is characterised in that:
Described note zinc pump is also respectively connected with described regulation valve and zinc solution case.
The presurized water reactor primary Ioops coolant zincification of zinc concentration can be automatically controlled the most as claimed in claim 2 Device, it is characterised in that:
Described online zinc concentration measurement apparatus obtains described zinc concentration data in real time and inputs Programmable logical controller Unit, compared with the zinc concentration desired value being previously set, adoption rate-Integrated Derivative (PID) algorithm obtains To zincification speed, further according to zincification solution concentration, calculate and add zinc solution injection flow.
The presurized water reactor primary Ioops coolant zincification of zinc concentration can be automatically controlled the most as claimed in claim 4 Device, it is characterised in that:
The described data signal adding zinc solution injection flow is inputted tune by described programmable logic control unit in real time Joint valve and note zinc pump, to control zincification speed in real time.
The presurized water reactor primary Ioops coolant zincification of zinc concentration can be automatically controlled the most as claimed in claim 5 Device, it is characterised in that:
Described data signal is digital signal or analogue signal.
The presurized water reactor primary Ioops coolant zincification of zinc concentration can be automatically controlled the most as claimed in claim 4 Device, it is characterised in that:
The expression formula of described zincification speed is:
v Z n = - K p ( Δ c + 1 τ I ∫ Δ c · d τ + τ D d Δ c d τ )
vZnFor zincification speed, Δ c is real-time zinc concentration and the gap of desired value in loop, represents PID respectively The output of algorithm and input quantity；τ express time；Three adjustable JIESHEN corresponding with ratio, integration and differential Number is respectively as follows: Proportional coefficient Kp, integration time constant τI, derivative time constant τD。
The presurized water reactor primary Ioops coolant zincification of zinc concentration can be automatically controlled the most as claimed in claim 4 Device, it is characterised in that:
The described zinc solution that adds injects flow=zincification speed/zincification solution concentration.
CN201610256491.5A 2016-04-22 2016-04-22 Pressurized water reactor primary circuit coolant zinc-adding device capable of automatically controlling zinc concentration Pending CN105931686A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4759900A (en) * 1986-08-27 1988-07-26 General Electric Company Inhibition of radioactive cobalt deposition in water-cooled nuclear reactors
CN1330794A (en) * 1999-10-12 2002-01-09 通用电气公司 Method for nuclear power plant decontamination
CN1347122A (en) * 2000-09-29 2002-05-01 东芝株式会社 Atomic reactor water quality controlling method and atomic energy generating apparatus
JP2004077320A (en) * 2002-08-20 2004-03-11 Toshiba Corp Method of reducing dose in turbine system
JP2005030814A (en) * 2003-07-09 2005-02-03 Hitachi Ltd Operation method for nuclear power generation plant
CN102099869A (en) * 2008-08-12 2011-06-15 三菱重工业株式会社 Method of operating nuclear plant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4759900A (en) * 1986-08-27 1988-07-26 General Electric Company Inhibition of radioactive cobalt deposition in water-cooled nuclear reactors
CN1330794A (en) * 1999-10-12 2002-01-09 通用电气公司 Method for nuclear power plant decontamination
CN1347122A (en) * 2000-09-29 2002-05-01 东芝株式会社 Atomic reactor water quality controlling method and atomic energy generating apparatus
JP2004077320A (en) * 2002-08-20 2004-03-11 Toshiba Corp Method of reducing dose in turbine system
JP2005030814A (en) * 2003-07-09 2005-02-03 Hitachi Ltd Operation method for nuclear power generation plant
CN102099869A (en) * 2008-08-12 2011-06-15 三菱重工业株式会社 Method of operating nuclear plant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李正军 编: "《计算机控制系统》", 30 November 2015, 机械工业出版社 *

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Application publication date: 20160907