CN107403648A - A kind of device for the throttling of passive component internal - Google Patents

A kind of device for the throttling of passive component internal Download PDF

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Publication number
CN107403648A
CN107403648A CN201710614952.6A CN201710614952A CN107403648A CN 107403648 A CN107403648 A CN 107403648A CN 201710614952 A CN201710614952 A CN 201710614952A CN 107403648 A CN107403648 A CN 107403648A
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CN
China
Prior art keywords
throttling
passive component
passive
connecting tube
component internal
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Application number
CN201710614952.6A
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Chinese (zh)
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CN107403648B (en
Inventor
胡文军
黎闫
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China Institute of Atomic of Energy
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China Institute of Atomic of Energy
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C7/00—Control of nuclear reaction
    • G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
    • G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
    • G21C7/12—Means for moving control elements to desired position
    • 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)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Details Of Valves (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

The invention discloses a kind of device for the throttling of passive component internal, and it includes absorber rod, lower end plug, upper connecting tube, lower connecting tube, intermediate casing, top grating, lower grid plate, interior throttling element, pull bar, pin, buffering throttling element, outer tube and operating head.Device of the present invention passes through the interior throttling element of suitable dimension and the cooperation of slit, aperture, can be in the case where meeting absorber rod heat transfer requirements, the critical flow that passive shut-down rod is suspended in working position is reduced, reduces passive component to the overall influence of reactor core；Pass through throttling element in change and the size at lower end plug, adjust resistance coefficient, the hull position of hydraulic resistance suffered by passive shut-down rod can be made to be higher than position of centre of gravity, so that passive shut-down rod is more stable when upper working position suspends, the eccentric probability of dropping process reduces；By buffering the cooperation of throttling element and operating head bypass port, passive shut-down rod can be made to meet fluid power self-tightening requirement in lower working position.

Description

A kind of device for the throttling of passive component internal
Technical field
The present invention relates to nuclear reactor art field, and in particular to a kind of device for the throttling of passive component internal.
Background technology
The passive shutdown component of liquid suspension formula (hereinafter referred to as passive component) is to be used to tackle reactor defluidization thing Therefore when C＆P systems, its main operational principle is：Before reactor hoisting power, with drive mechanism by passive shutdown High workload position is arrived in rod lifting, with the increase of coolant flow, when cooling agent to passive rod hydraulic thrust more than passive Shut-down rod weight, the handgrip of drive mechanism discharge passive shut-down rod, effect of the passive shut-down rod in cooling agent hydraulic thrust Under, it is maintained at highest operating position；When loss-of-flow accident occurs, with the reduction of coolant flow, cooling agent hydraulic thrust is small In passive shut-down rod weight, passive shut-down rod falls under gravity, is parked in deceleration area first, then slowly stops In halt position.
Passive component can improve the security of reactor, the ability of lifting fast reactor reply loss-of-flow accident, go back at home There is no correlative study.Therefore need to research and develop the equipment, to improve the security of reactor.Passive component and routine The principle and function of control rod are all different, because the particularity of its operation principle is, it is necessary to stream to passive component internal Road structure is studied and designed, by some special throttle structures etc. to meet to suspend, fall, the function such as fluid power self-tightening. Domestic fast reactor present situation need to be combined, designs and meets that critical flow is small, the passive component for the requirement such as stable of falling.
The content of the invention
For defect present in prior art, it is an object of the invention to provide one kind disclosure satisfy that critical flow it is small, Fall device that is stable and being reliably used for the throttling of passive component internal.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of device for the throttling of passive component internal, it is characterised in that：Described device includes absorber rod, lower end Plug, upper connecting tube, intermediate casing, lower connecting tube, top grating, lower grid plate, interior throttling element, pull bar, pin, buffer throttling element, be outer Sleeve pipe and operating head, wherein the absorber rod and lower end plug are located at the upper and lower ends of the lower connecting tube, the suction respectively The main body of acceptor rod is located in the inner chamber of the intermediate casing, and the upper connecting tube is arranged on the upper end of the intermediate casing, The upper end of the interior throttling element and absorber rod is located in the upper and lower ends in the upper connection tube cavity respectively, the upper connection Pipe, intermediate casing and lower connecting tube are arranged in the operating head inner chamber, its upper end of the operating head be arranged on the pull bar and Between upper connecting tube, the lower bit buffering throttling element is arranged in the bottom inner chamber of the outer tube, the pin with it is described outer The bottom of sleeve pipe is connected, and the top grating and lower grid plate are separately positioned in the inner chamber of the intermediate casing.
Further, the lower end plug includes lower end plug body and is arranged on what the lower end plug body bottom stretched out The hemispherical lower end plug end in longitudinal section, wherein being provided with three circumferentially spaced cylinders on the plug body of the lower end Hole.
Further, eight cylinder apertures are uniformly offered on described its outer face of lower connecting tube.
Further, three apertures are offered on described its center of buffering throttling element.
Further, its outer end of the operating head is connected with the hexangle type outer tube being provided with.
Further, three bypass ports are offered at its lower end side of the operating head.
Further, its upper end of the operating head, which is additionally provided with, prevents it from producing the limited impression structure of disturbance.
Further, set fluted on its outer end end face center position of the upper connecting tube, the pull bar passes through described recessed Groove is fixedly connected in the upper connecting tube.
Further, the interior throttling element is provided with three circumferentially spaced cylindrical holes, is set on upper surface fluted.
Further, the operating head is leptosomatic hollow tubular structure.
The beneficial effects of the present invention are：, can be full by the cooperation of the interior throttling element and slit, aperture of suitable dimension In the case of sufficient absorber rod heat transfer requirements, the critical flow that passive shut-down rod is suspended in working position is reduced, reduces non-energy Dynamic component is to the overall influence of reactor core；By throttling element in change and the size at lower end plug, resistance coefficient is adjusted, can be made non- The hull position of hydraulic resistance suffered by active shut-down rod is higher than position of centre of gravity, so that passive shut-down rod suspends in upper working position Shi Gengjia is stable, and the probability of dropping process off-axis reduces；The cooperation of bypass port on throttling element and guide pipe is buffered, is stopped to passive Heap rod dropping process plays a part of buffering, reduces its impact to assembly housing, and causes passive component in lower working position Meet fluid power self-tightening requirement.
Brief description of the drawings
Fig. 1 is the cross-sectional view of lower end plug in the specific embodiment of the invention.
Fig. 2 is lower connecting pipe structure schematic diagram in the specific embodiment of the invention.
Fig. 3 is the cross-sectional view of interior throttling element in the specific embodiment of the invention.
Fig. 4 is that throttling element structural representation is buffered in the specific embodiment of the invention.
Fig. 5 is operating head structural representation in the specific embodiment of the invention.
Fig. 6 is passive component overall schematic in the specific embodiment of the invention.
Fig. 7 is the passive component diagram of certain reactor in the specific embodiment of the invention.
Description of reference numerals in figure：
End plug under 1-, end plug body under 11-, end plug end under 12-, 13- cylindrical holes, connecting tube under 2-, 21- cylinders are small Hole, the upper connecting tubes of 3-, 4- absorber rods, throttling element in 5-, 6- pull bars, 7- pins, 8- outer tubes, 9- buffering throttling elements, 91- are small Hole, 10- operating heads, 101- limited impressions, 14- top gratings, 15- lower grid plates.
Embodiment
With reference to Figure of description, the present invention is described in further detail with embodiment.
Referring to figs. 1 to shown in 7, the present embodiment provides a kind of device for the throttling of passive component internal, and it includes inhaling Acceptor rod 4, lower end plug 1, upper connecting tube 3, intermediate casing (not shown), lower connecting tube 2, outer tube 8, top grating 14, under Screen 15, interior throttling element 5, pull bar 6, pin 7, buffering throttling element 9 and operating head 10, wherein absorber rod 4 and lower end plug 1 divide The upper and lower ends of connecting tube 2 Wei Yu not be descended, the main body of absorber rod 4 is located in the inner chamber of intermediate casing, and upper connecting tube 3 is arranged on On the upper end of intermediate casing, the upper end of interior throttling element 5 and absorber rod 4 is located at the upper and lower ends in the upper inner chamber of connecting tube 3 respectively It is interior, set fluted on its outer end end face center position of interior throttling element 5, pull bar 6 is fixedly connected on interior throttling element 5 by the groove On, operating head 10 is leptosomatic hollow tubular structure, and upper connecting tube 3, intermediate casing and lower connecting tube 2 are arranged on the inner chamber of operating head 10 In, its upper end of operating head 10 is arranged between pull bar 6 and upper connecting tube 3, and buffering throttling element 9 is arranged in the bottom of operating head 10 In chamber, pin 7 is connected with the bottom of operating head 10, and top grating 14 and lower grid plate 15 are separately positioned in the inner chamber of intermediate casing. Referring to the drawings shown in 1, the above-mentioned lower end plug 1 in the present embodiment includes lower end plug body 11 and is arranged on the lower bottom of end plug body 11 The hemispherical lower end plug end 12 in the longitudinal section to stretch out is held, wherein between being provided with three circumferentially in lower end plug body 11 Every the cylindrical hole 13 of distribution.After cooling agent enters component, shunting is formed when flowing through lower end plug 1, a part is entered non-by aperture In active shut-down rod, cooling effect is played to absorber rod 4, another part flows along annular channel.
In addition, please uniformly opened up on its outer face of lower connecting tube 2 in the present embodiment in conjunction with referring to the drawings shown in 2 to 5 There are eight cylinder apertures 21, cylinder aperture 21 is uniformly distributed circumferentially, and the coolant flow in annular channel during aperture through that can form Shunting, understands some fluid and enters in passive shut-down rod, conflux with internal flow again, common cooling absorber rod 4, and Remaining fluid continues on annular channel flowing.Interior throttling element 5 is placed in inside connecting tube 3, by right-angled bend, sudden contraction and is dashed forward The modes such as expansion realize throttling action, increase the resistance coefficient inside moving body, so as to influence assignment of traffic situation.Meanwhile this reality Apply and offer three apertures 91 on above-mentioned its center of buffering throttling element 9 in example, it can ensure passive when reloading Cooling agent in component can be automatically drained out；Its another important function is, the characteristics of using runner, reduces passive shut-down rod and exists Buoyancy during lower working position, to ensure that passive shut-down rod meets the requirement of fluid power self-tightening.
In addition, its outer end of aforesaid operations first 10 in the present embodiment is connected with the hexangle type outer tube 8 being provided with, operating head Three bypass ports are offered at 10 its lower end side, its upper end of operating head 10, which is additionally provided with, prevents it from producing the limited impression of disturbance 101 structures.In the present embodiment, the function of described operating head 10 mainly have it is following some：
1) when reloading, drive mechanism handgrip need to grasp operating head upper end and realize replacing function；
2) narrow annular channel runner is formed between inner tubal wall and passive shut-down rod, increases on-way resistance, it is passive to being lifted The hydraulic thrust of shut-down rod plays a role, while plays guide effect to passive shut-down rod；
3) operating head lower end side is provided with three bypass ports, and convection body plays by-pass flow effect, so as to ensure passive shutdown Rod realizes fluid power self-tightening in lower working position；
4) the limited bit architecture of operating head inner upper, passive shut-down rod is made to be maintained in upper working position at upper limit, Its groove structure ensures that disturbance of the passive shut-down rod in upper working position to position is insensitive simultaneously.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technology Within, then the present invention is also intended to comprising including these changes and modification.

Claims (10)

  1. A kind of 1. device for the throttling of passive component internal, it is characterised in that：Described device includes absorber rod, lower end Plug, upper connecting tube, intermediate casing, lower connecting tube, top grating, lower grid plate, interior throttling element, pull bar, pin, buffer throttling element, be outer Sleeve pipe and operating head, wherein the absorber rod and lower end plug are located at the upper and lower ends of the lower connecting tube, the suction respectively The main body of acceptor rod is located in the inner chamber of the intermediate casing, and the upper connecting tube is arranged on the upper end of the intermediate casing, The upper end of the interior throttling element and absorber rod is located in the upper and lower ends in the upper connection tube cavity respectively, the upper connection Pipe, intermediate casing and lower connecting tube are arranged in the operating head inner chamber, its upper end of the operating head be arranged on the pull bar and Between upper connecting tube, the buffering throttling element is arranged in the bottom inner chamber of the outer tube, the pin and the outer tube Bottom be connected, the top grating and lower grid plate are separately positioned in the inner chamber of the intermediate casing.
  2. A kind of 2. device for the throttling of passive component internal according to claim 1, it is characterised in that：The lower end Plug includes lower end plug body and is arranged on the hemispherical lower end plug in longitudinal section that the lower end plug body bottom stretches out End, wherein being provided with three circumferentially spaced cylindrical holes on the plug body of the lower end.
  3. A kind of 3. device for the throttling of passive component internal according to claim 2, it is characterised in that：The lower company Take on its outer face and uniformly offer eight cylinder apertures.
  4. A kind of 4. device for the throttling of passive component internal according to claim 3, it is characterised in that：The buffering Three apertures are offered on its center of throttling element.
  5. A kind of 5. device for the throttling of passive component internal according to claim 3, it is characterised in that：The operation Its outer end of head is connected with the hexangle type outer tube being provided with.
  6. A kind of 6. device for the throttling of passive component internal according to claim 5, it is characterised in that：The operation Three bypass ports are offered at its lower end side of head.
  7. A kind of 7. device for the throttling of passive component internal according to claim 6, it is characterised in that：The operation Head passive shut-down rod upper limit at have prevent its produce disturbance groove structure, groove structure be located on the operating head or Described in person on passive shut-down rod.
  8. A kind of 8. device for the throttling of passive component internal according to claim 7, it is characterised in that：The upper company Take on its outer end end face center position and set fluted, the pull bar is fixedly connected on the upper connecting tube by the groove On.
  9. A kind of 9. device for the throttling of passive component internal according to claim 8, it is characterised in that：The internal segment Stream part is provided with three circumferentially spaced cylindrical holes, is set on upper surface fluted.
  10. A kind of 10. device for the throttling of passive component internal according to claim 9, it is characterised in that：The behaviour It is leptosomatic hollow tubular structure to make head.
CN201710614952.6A 2017-07-25 2017-07-25 A kind of device for the throttling of passive component internal Active CN107403648B (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110752044A (en) * 2019-11-21 2020-02-04 中国核动力研究设计院 Control rod with water flowing inside
CN112037943A (en) * 2020-07-28 2020-12-04 中国原子能科学研究院 Hydraulic suspension split type passive shutdown assembly for fast neutron reactor
CN112837831A (en) * 2021-01-08 2021-05-25 上海核工程研究设计院有限公司 Bypass-flow-saving control rod and guide tube combined structure
CN113871042A (en) * 2021-09-26 2021-12-31 中国原子能科学研究院 Replacing device for control rod assembly moving body

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3775247A (en) * 1970-06-18 1973-11-27 Asea Atom Ab Control rod drive for a water-cooled nuclear reactor
US3899390A (en) * 1971-06-14 1975-08-12 Siemens Ag Measuring apparatus for the coolant outlet temperature in nuclear-reactor fuel elements
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EP0133173A1 (en) * 1983-06-21 1985-02-13 ACEC, Société Anonyme Dismountable fixing arrangement for a throttle closure
JPS6168588A (en) * 1984-09-13 1986-04-08 株式会社東芝 Control rod aggregate
CN1060922A (en) * 1991-06-05 1992-05-06 清华大学 The opposite hole type hydraulic step-by-step cylinder that is used for the reactor control rod transmission
US7197103B2 (en) * 2001-12-13 2007-03-27 Framatome Anp Gmbh Control rod drive for a nuclear reactor and method for moving a control rod into a reactor core of a nuclear reactor

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US3775247A (en) * 1970-06-18 1973-11-27 Asea Atom Ab Control rod drive for a water-cooled nuclear reactor
US3899390A (en) * 1971-06-14 1975-08-12 Siemens Ag Measuring apparatus for the coolant outlet temperature in nuclear-reactor fuel elements
US3928129A (en) * 1972-08-31 1975-12-23 Siemens Ag Nuclear reactor element
EP0133173A1 (en) * 1983-06-21 1985-02-13 ACEC, Société Anonyme Dismountable fixing arrangement for a throttle closure
US4738023A (en) * 1983-06-21 1988-04-19 Ateliers De Constructions Electriques De Charleroi (Acec) Societe Anonyme Hooking apparatus for a removable constriction plug
JPS6168588A (en) * 1984-09-13 1986-04-08 株式会社東芝 Control rod aggregate
CN1060922A (en) * 1991-06-05 1992-05-06 清华大学 The opposite hole type hydraulic step-by-step cylinder that is used for the reactor control rod transmission
US7197103B2 (en) * 2001-12-13 2007-03-27 Framatome Anp Gmbh Control rod drive for a nuclear reactor and method for moving a control rod into a reactor core of a nuclear reactor

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吴林等: "钠冷快堆非能动悬浮控制棒停堆系统的可行性", 《中国核工业》 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110752044A (en) * 2019-11-21 2020-02-04 中国核动力研究设计院 Control rod with water flowing inside
CN112037943A (en) * 2020-07-28 2020-12-04 中国原子能科学研究院 Hydraulic suspension split type passive shutdown assembly for fast neutron reactor
CN112037943B (en) * 2020-07-28 2023-03-14 中国原子能科学研究院 Hydraulic suspension split type passive shutdown assembly for fast neutron reactor
CN112837831A (en) * 2021-01-08 2021-05-25 上海核工程研究设计院有限公司 Bypass-flow-saving control rod and guide tube combined structure
CN112837831B (en) * 2021-01-08 2024-02-06 上海核工程研究设计院股份有限公司 Control rod and guide pipe combined structure capable of saving side flow
CN113871042A (en) * 2021-09-26 2021-12-31 中国原子能科学研究院 Replacing device for control rod assembly moving body
CN113871042B (en) * 2021-09-26 2023-12-12 中国原子能科学研究院 Material changing device for control rod assembly moving body

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