CN101572127B - Nuclear fuel rod, nuclear fuel component and nuclear reactor core - Google Patents
Nuclear fuel rod, nuclear fuel component and nuclear reactor core Download PDFInfo
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- CN101572127B CN101572127B CN200810066925A CN200810066925A CN101572127B CN 101572127 B CN101572127 B CN 101572127B CN 200810066925 A CN200810066925 A CN 200810066925A CN 200810066925 A CN200810066925 A CN 200810066925A CN 101572127 B CN101572127 B CN 101572127B
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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
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- 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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Abstract
The invention is applicable to the field of nuclear station fuel components and nuclear reactor cores, and provides a nuclear fuel rod, a nuclear fuel component and a nuclear reactor core. The nuclearfuel rod comprises two fuel pellets of different types in the axial direction thereof, i.e. a uranium dioxide fuel pellet and a gadolinium burnable poison fuel pellet; the nuclear fuel rod provided b y the invention uses a type of fuel pellet as the main body, and the other type of fuel pellet is positioned at one end or two ends of the main fuel rod; the axial power error is improved, and the fuel utilization economy is improved, or the circulation length of the reactor core is prolonged through changing the neutron flux of the top end or the bottom end of the reactor core, so that the running performance of the reactor core is improved.
Description
Technical field
The invention belongs to s Nuclear Plant and nuclear reactor field, relate in particular to a kind of nuclear fuel rod, nuclear fuel assembly and nuclear reactor.
Background technology
Fig. 1 shows the structural representation of the nuclear fuel rod that prior art provides, and nuclear fuel rod generally is divided into two types: uranium dioxide (UO2) fuel rod and the fuel rod that contains gadolinium burnable poison (Gd2O3).Wherein the uranium dioxide fuel rod is made up of uranium dioxide pellet; The fuel rod that contains the gadolinium burnable poison is made up of gadolinium burnable poison fuel pellet, and gadolinium burnable poison fuel pellet is to be mixed by uranium dioxide (UO2) and gadolinium burnable poison (Gd2O3).
Comprehensive above-mentionedly know, only contain one type fuel pellet in the nuclear fuel rod of the prior art, only contain uranium dioxide pellet in the promptly same fuel rod, only contain gadolinium burnable poison fuel pellet in the perhaps same fuel rod.This design is comparatively simple, help making, but the axial power control, the fuel economy that are unfavorable for reactor core is relatively poor, to such an extent as to the runnability of reactor core is restricted.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of nuclear fuel rod, is intended to solve the fuel pellet that only contains a type in the nuclear fuel rod of prior art and causes the limited problem of reactor core runnability.
The embodiment of the invention is achieved in that a kind of nuclear fuel rod, said nuclear fuel rod axially comprise two kinds of dissimilar fuel pellets; Said two kinds of dissimilar fuel pellets are uranium dioxide pellet and gadolinium burnable poison fuel pellet; Wherein one type fuel pellet is a main body; The fuel pellet of another kind of type is positioned at an end of main fuel rod; Said gadolinium burnable poison fuel pellet is mixed by uranium dioxide and gadolinium burnable poison, and the percentage by weight of the gadolinium burnable poison in the said gadolinium burnable poison fuel pellet is 4%-12%.
Another purpose of the embodiment of the invention is to provide a kind of nuclear fuel assembly that adopts above-mentioned nuclear fuel rod.
Another purpose of the embodiment of the invention also is to provide a kind of nuclear reactor that adopts above-mentioned nuclear fuel assembly.
The nuclear fuel rod that the embodiment of the invention provides is the main body with one type fuel pellet; The fuel pellet of another kind of type is positioned at the one or both ends of main fuel rod; Through changing the neutron flux of reactor core top or bottom; Improve the economy of fuel utilization or the length of the cycle that prolongs reactor core, thereby improve the runnability of reactor core.
Description of drawings
Fig. 1 is the structural representation of the nuclear fuel rod that provides of prior art;
Fig. 2 is the structural representation of the nuclear fuel rod that provides of the embodiment of the invention;
Fig. 3 is that the nuclear fuel rod that provides of first embodiment of the invention is to axial power effects and prior art synoptic diagram relatively;
Fig. 4 is variation and prior art relatively the synoptic diagram of the power peak factor of the nuclear fuel rod that provides of first embodiment of the invention with burnup.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The nuclear fuel rod that the embodiment of the invention provides is axially containing uranium dioxide pellet and gadolinium burnable poison fuel pellet, has improved the runnability of reactor core.
With 1,000,000 millions pressurized-water reactor nuclear power plants is example, and reactor core fuel is made up of 157 group 17 * 17 fuel assembly, and each group fuel assembly is made up of 264 fuel rods, and every fuel rod comprises 272 fuel pellets.Contain two kinds of dissimilar fuel pellets in the nuclear fuel rod that the embodiment of the invention provides.As one embodiment of the present of invention, two kinds of dissimilar fuel pellets are uranium dioxide pellet and gadolinium burnable poison fuel pellet; Wherein, gadolinium burnable poison fuel pellet is mixed by uranium dioxide and gadolinium burnable poison, and the percentage by weight of the gadolinium burnable poison (Gd2O3) in the gadolinium burnable poison fuel pellet is 4%-12%; U235 in the gadolinium burnable poison fuel pellet can be the tailing that produces of uranium enrichment, natural uranium or the uranium of enrichment a little, and the enrichment of U235 is less than the enrichment of U235 in the uranium dioxide pellet.In the embodiment of the invention, nuclear fuel rod is the main body with one type fuel pellet, and the fuel pellet of another kind of type is positioned at the one or both ends of main fuel rod; Be the one or both ends that uranium dioxide pellet can be positioned at the fuel rod that contains the gadolinium burnable poison; Gadolinium burnable poison fuel pellet can be positioned at uranium dioxide fuel rod one or both ends.
As one embodiment of the present of invention, the height that is positioned at the fuel pellet of the excellent one or both ends of main fuel all should be no more than 1/8 of whole nuclear fuel rod height.
In the embodiment of the invention, the end is top and bottom.Fig. 2 shows the structural representation of 6 kinds of schemes of the nuclear fuel rod that the embodiment of the invention provides, and existing details are as follows respectively:
The 3rd kind of scheme is: the gadolinium burnable poison fuel pellet that adds the part height at the top of uranium dioxide fuel rod.The 4th kind of scheme is: the gadolinium burnable poison fuel pellet that adds the part height in the bottom of uranium dioxide fuel rod.Wherein, gadolinium burnable poison fuel pellet is to be mixed by uranium dioxide and gadolinium burnable poison.Because the gadolinium burnable poison plays intercept neutrons in reactor core; Therefore the gadolinium combustible poison core block that adds the part height in the top or the bottom of uranium dioxide fuel rod; Can reduce this regional neutron flux, improve the axial power deviation of reactor core, and improve the economy of fuel.
The 5th kind of scheme is: the uranium dioxide pellet that adds the part height simultaneously in the top and the bottom of the fuel rod that contains the gadolinium burnable poison.Can prolong the length of the cycle of reactor core like this.
The 6th kind of scheme is: the gadolinium burnable poison fuel pellet that adds the part height simultaneously in the top and the bottom of uranium dioxide fuel rod.Can improve the economy of fuel like this.
The concrete characteristics of 6 kinds of schemes of the nuclear fuel rod that the embodiment of the invention provides are shown in table one:
| Improve the axial power deviation | The economy of fuel | Prolong the reactor core length of the cycle | |
| The 1st kind of scheme | √ | √ | |
| The 2nd kind of scheme | √ | √ | |
| The 3rd kind of scheme | √ | √ | |
| The 4th kind of scheme | √ | √ | |
| The 5th kind of scheme | √ | ||
| The 6th kind of scheme | √ |
In the mode of the axial employing subregion of fuel rod, thus can improve reactor core the axial power deviation, improve economy that fuel utilizes, runnability that the length of the cycle that prolongs reactor core improves reactor core.Can choose the different schemes of fuel rod according to concrete needs flexibly.
The axial power deviation is an important sign amount that influences reactor core control dirigibility, and for the security that guarantees reactor core and make it be in a zone that is easy to control, the axial power deviation can not be too just, can not be too negative, and proper near zero.With the 1st kind of scheme is example; The nuclear fuel rod that the embodiment of the invention is provided compares the influence of axial power deviation the nuclear fuel rod that the influence and the prior art of axial power deviation provides; As shown in Figure 3; The nuclear fuel rod that the embodiment of the invention provides more approaches zero to the influence of axial power deviation, and is more suitable.In like manner; With the 1st kind of scheme is example; The nuclear fuel rod power peak factor that nuclear fuel rod that first embodiment of the invention is provided and prior art provide is contrasted with the variation of burnup, and as shown in Figure 4, the nuclear fuel rod that the embodiment of the invention provides can effectively reduce the peak power peak factor.
The nuclear fuel rod that the embodiment of the invention provides can be applied in nuclear fuel assembly and the nuclear reactor thereof; Above-mentioned 6 kinds of design proposals can satisfy various demand; For head circulation, its nuclear reactor emphasis of design is to control the positive excessively axial power deviation that the negative excessively axial power deviation of beginning of life and the end of term in longevity possibly occur.Therefore select the nuclear fuel rod of the 1st kind of scheme for use, can improve first round-robin axial power deviation effectively, and reduce the power peak factor of reactor core, and the length of the cycle of reactor core also extends to 456 equivalent full power days from 453 equivalent full power days.As one embodiment of the present of invention, nuclear fuel rod can be applicable to the first circulation of pressurized-water reactor nuclear power plant and contains in the reactor core design of gadolinium, is used for significantly improving the first axial power concussion that circulates in the whole phase in longevity, improves the runnability of reactor.
The nuclear fuel rod that the embodiment of the invention provides is axially comprising two kinds of dissimilar fuel pellets; Fuel pellet with one type is the main body, and the fuel pellet of another kind of type is positioned at the one or both ends of main fuel rod, through changing the neutron flux of reactor core top or bottom; Improve the economy of fuel utilization or the length of the cycle that prolongs reactor core; Thereby improved the runnability of reactor core, simultaneously, can select the different designs scheme of fuel rod flexibly according to demand.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a nuclear fuel rod is characterized in that, said nuclear fuel rod axially comprise two kinds of dissimilar fuel pellets; Said two kinds of dissimilar fuel pellets are uranium dioxide pellet and gadolinium burnable poison fuel pellet; Wherein one type fuel pellet is a main body; The fuel pellet of another kind of type is positioned at an end of main fuel rod; Said gadolinium burnable poison fuel pellet is mixed by uranium dioxide and gadolinium burnable poison, and the percentage by weight of the gadolinium burnable poison in the said gadolinium burnable poison fuel pellet is 4%-12%.
2. nuclear fuel rod as claimed in claim 1 is characterized in that, the enrichment of the U235 in the said gadolinium burnable poison fuel pellet is less than the enrichment of U235 in the said uranium dioxide pellet.
3. nuclear fuel rod as claimed in claim 1 is characterized in that, the said height that is positioned at the fuel pellet of the excellent end of main fuel is no more than 1/8 of whole nuclear fuel rod height.
4. nuclear fuel assembly that adopts the arbitrary nuclear fuel rod of claim 1 to 3.
5. nuclear reactor that adopts the nuclear fuel assembly of claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810066925A CN101572127B (en) | 2008-04-28 | 2008-04-28 | Nuclear fuel rod, nuclear fuel component and nuclear reactor core |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810066925A CN101572127B (en) | 2008-04-28 | 2008-04-28 | Nuclear fuel rod, nuclear fuel component and nuclear reactor core |
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| CN101572127A CN101572127A (en) | 2009-11-04 |
| CN101572127B true CN101572127B (en) | 2012-10-03 |
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| CN200810066925A Active CN101572127B (en) | 2008-04-28 | 2008-04-28 | Nuclear fuel rod, nuclear fuel component and nuclear reactor core |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3690891A4 (en) * | 2017-09-28 | 2021-06-02 | Hualong Pressurized Water Reactor Technology Corporation, Ltd. | Fuel rod and fuel assembly |
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|---|---|---|---|---|
| CN103384903B (en) * | 2010-11-15 | 2017-06-23 | 加拿大原子能有限公司 | Uranium and the nuclear fuel of depleted nuclear fuel and the nuclear fuel cluster comprising the nuclear fuel and nuclear reactor containing recovery |
| CA2817767C (en) * | 2010-11-15 | 2018-09-04 | Atomic Energy Of Canada Limited | Nuclear fuel containing a neutron absorber |
| CN103000232B (en) * | 2012-12-05 | 2015-07-29 | 中国核电工程有限公司 | The head of a kind of advanced person circulates stowage of reloading for 18 months |
| FR3005046B1 (en) * | 2013-04-29 | 2015-05-15 | Commissariat Energie Atomique | NEW MATERIAL BASED ON URANIUM, GADOLINIUM AND OXYGEN AND USE THEREOF AS CONSUMABLE NEUTRONIC POISON |
| CN106128517B (en) * | 2016-06-24 | 2017-11-28 | 西安交通大学 | A kind of supercritical carbon dioxide using rod shape fuel component cools down rickle |
| FR3069694A1 (en) * | 2017-07-28 | 2019-02-01 | Areva Np | METHOD FOR MONITORING A NUCLEAR HEART COMPRISING RELAXATION OF A THRESHOLD, PROGRAM, SUPPORT AND NUCLEAR REACTOR THEREOF |
| CN108550405A (en) * | 2018-03-23 | 2018-09-18 | 中山大学 | Mox fuel stick, mox fuel component and the method for flattening axial power |
| CN109887627B (en) * | 2019-02-26 | 2020-07-03 | 三门核电有限公司 | Average axial flux deviation acquiring system of reactor core |
| CN112259269A (en) * | 2020-10-21 | 2021-01-22 | 中国核动力研究设计院 | Loading method for 18-month cycle length of reactor core of million-kilowatt pressurized water reactor nuclear power plant |
| CN113436756B (en) * | 2021-06-04 | 2023-03-10 | 西安交通大学 | Compact type space reactor core structure suitable for passive start |
| CN113782230B (en) * | 2021-08-27 | 2023-11-10 | 中国原子能科学研究院 | Nuclear reactor safety rod and nuclear reactor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587087A (en) * | 1983-02-22 | 1986-05-06 | Westinghouse Electric Corp. | Burnable absorber coated nuclear fuel |
| CN1051452A (en) * | 1989-11-03 | 1991-05-15 | 西屋电气公司 | Optimum fuel utilization factor fuel assembly and rod |
| CN1133176C (en) * | 2001-03-30 | 2003-12-31 | 中国核动力研究设计院 | Method for preparing Gd2O3-UO2 flammable poison fuel core block by using U3O8 powder |
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2008
- 2008-04-28 CN CN200810066925A patent/CN101572127B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587087A (en) * | 1983-02-22 | 1986-05-06 | Westinghouse Electric Corp. | Burnable absorber coated nuclear fuel |
| CN1051452A (en) * | 1989-11-03 | 1991-05-15 | 西屋电气公司 | Optimum fuel utilization factor fuel assembly and rod |
| CN1133176C (en) * | 2001-03-30 | 2003-12-31 | 中国核动力研究设计院 | Method for preparing Gd2O3-UO2 flammable poison fuel core block by using U3O8 powder |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2007-93272A 2007.04.12 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3690891A4 (en) * | 2017-09-28 | 2021-06-02 | Hualong Pressurized Water Reactor Technology Corporation, Ltd. | Fuel rod and fuel assembly |
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| CN101572127A (en) | 2009-11-04 |
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Address after: 518031 Futian District, Shenzhen, Guangdong, Futian District, 15 steps (1502-1504, 1506) of Shenzhen science and technology building. Patentee after: CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE Address before: 518000 KELONG Nuclear Power Technology Research Institute, 13 floor of block A, Jiangsu Road, Futian District Yitian Road, Shenzhen, Guangdong Patentee before: Zhongkehua Nuclear Power Technology Institute Co., Ltd. |
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