CN108806803A - solid-liquid mixed fuel reactor core - Google Patents
solid-liquid mixed fuel reactor core Download PDFInfo
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- CN108806803A CN108806803A CN201810577927.XA CN201810577927A CN108806803A CN 108806803 A CN108806803 A CN 108806803A CN 201810577927 A CN201810577927 A CN 201810577927A CN 108806803 A CN108806803 A CN 108806803A
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- reactor core
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C1/00—Reactor types
- G21C1/04—Thermal reactors ; Epithermal reactors
- G21C1/06—Heterogeneous reactors, i.e. in which fuel and moderator are separated
- G21C1/22—Heterogeneous reactors, i.e. in which fuel and moderator are separated using liquid or gaseous fuel
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C9/00—Emergency protection arrangements structurally associated with the reactor, e.g. safety valves provided with pressure equalisation devices
- G21C9/02—Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; Control elements having arrangements activated in an emergency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention discloses the lead bismuth reflecting layer outside a kind of Solid-liquid Mixed Fuel reactor core, including reactor core active region, reactor core active region and two layers of stainless steel shielded layers outside lead bismuth reflecting layer；The reactor core active region is most intermediate to use liquid fuel, peripheral part that the solid fuel of different degree of enrichment is respectively adopted；Liquid fuel can also be arranged in periphery or reactor core other positions according to actual demand；And it is disposed with control rod and regulating rod in the liquid fuel and solid fuel.The present invention arranges liquid fuel component in traditional reactor core, after generation accident when reactor core reaches certain temperature, reactor can be made to reach subcritical by the discharge of liquid fuel, and the pipeline after liquid fuel discharge can be utilized to take away part of waste heat, to which the probability of major accident generation be greatly lowered, or even the generation that can fundamentally avoid a nasty accident.
Description
Technical field
The present invention relates to nuclear safety fields, and in particular to a kind of Solid-liquid Mixed Fuel reactor core.
Background technology
Nuclear energy is considered as solving energy crisis within the scope of our times, environmental pollution and the problems such as sustained economic development
Effective way.However, nuclear safety, nuclear fuel, nuclear energy economy, nuclear waste disposal and nuclear proliferation problem are persistently sent out as nuclear energy
The key restriction factors of exhibition.Current existing reactor is there is accident (be unable to shutdown or with coolant loss when)
When, reactor core can melt, to cause major accident；After especially Fukushima Nuclear Power Accident occurs, Nuclear Safety seems especially prominent.
On the international symposiums Gen-IV in 2002, accelerates the 4th generation of technology such as nuclear energy system that research and development have greater security energy and have become altogether
Know.The extremely important feature of forth generation reactor be exactly provide can solve very well nuclear energy economy, safety, waste processing and
The nuclear power system for problem of preventing nuclear proliferation.
Invention content
To solve the above problems, the present invention provides a kind of Solid-liquid Mixed Fuel reactor cores, in traditional reactor
Core arranges liquid fuel component, after generation accident when reactor core reaches certain temperature, can be made instead by the discharge of liquid fuel
It answers heap to reach subcritical, and the pipeline after liquid fuel discharge can be utilized to take away part of waste heat, it is serious to be greatly lowered
The probability that accident occurs, or even the generation that can fundamentally avoid a nasty accident.
To achieve the above object, the technical solution that the present invention takes is：
Lead bismuth reflecting layer outside Solid-liquid Mixed Fuel reactor core, including reactor core active region, reactor core active region and lead
Two layers of stainless steel shielded layer outside bismuth reflecting layer；The reactor core active region is most intermediate to use liquid fuel, peripheral part to adopt respectively
With the solid fuel of different degree of enrichment；And it is disposed with control rod and regulating rod in the liquid fuel and solid fuel；In accident
When reactor core reaches certain temperature after generation, so that reactor is reached subcritical by the discharge of liquid fuel, arranged using liquid fuel
Pipeline after putting takes away part of waste heat, to which the probability of major accident generation be greatly lowered, or even can fundamentally avoid tight
The generation of weight accident.
Further, logical by the liquid fuel component of the emptying into reactor core active region after accident occurs in reactor
Road injects liquid or gas etc., takes away reactor core part of waste heat cooling reactor core.
Preferably, the liquid fuel is liquid fuel UBi, and solid fuel is uranium dioxide；According to actual conditions, reactor core
Fuel other types of solid fuel and liquid fuel can also be used to carry out fuel combination Core Design.
Preferably, the thickness in lead bismuth reflecting layer is the thickness of a fuel assembly opposite side distance.
Preferably, which can be designed to different capacity according to actual demand.Solid-liquid Mixed Fuel reactor is set
Meter theory is fully available in powerful reactor core design.
The invention has the advantages that：
Using forth generation reactor system as target, be put forward for the first time " Solid-liquid Mixed Fuel reactor concepts ", the heap-type
Liquid fuel component is arranged in traditional reactor core, when core temperature reaches a certain level after generation accident, can be passed through
The discharge of liquid fuel makes reactor reach subcritical, and the pipeline after liquid fuel discharge can be utilized to take away part of waste heat,
To which the probability of major accident generation be greatly lowered, or even the generation that can fundamentally avoid a nasty accident.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of Solid-liquid Mixed Fuel reactor core of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of a concrete application example of the invention.
Specific implementation mode
In order to make objects and advantages of the present invention be more clearly understood, the present invention is carried out with reference to embodiments further
It is described in detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this hair
It is bright.
As an embodiment of the present invention provides a kind of Solid-liquid Mixed Fuel reactor cores, including reactor core active region, reactor core by Fig. 1
Two layers of stainless steel shielded layer outside lead bismuth reflecting layer and lead bismuth reflecting layer outside active region；The reactor core active region is most intermediate to adopt
With liquid fuel, the solid fuel of different degree of enrichment is respectively adopted in peripheral part；It can also be by liquid fuel according to actual demand
It is arranged in periphery or reactor core other positions；And control rod and regulating rod in the liquid fuel and solid fuel.
Above-mentioned Solid-liquid Mixed Fuel reactor core is as obtained by following steps design：
S1, full heap is established using the reactor core Thermal-hydraulic code SOCAS of core physics analysis program SRAC and nuclear reactor
Three dimensional physical thermal technology's model of coupling of core high-accuracy high-resolution carries out physical thermal to Solid-liquid Mixed Fuel reactor core
Work point is analysed；By analyzing major parameters such as changes of reactivity, core temperature, coolant pressure drops, determine that Solid-liquid Mixed Fuel is anti-
Answer the basic arrangement of heap reactor core；
S2, consider reactor safety and economy, reactor is determined using multi-objective nonlinear optimization theory
The respective shared ratio of solid fuel and liquid fuel in reactor core, what optimization reactor after liquid fuel be discharged was reached secondary faces
Boundary's depth；Make reactor when there are accident conditions, reactor can automatic shutdown, the generation to avoid a nasty accident；
S3, nuclear reactor is obtained as a result, being analyzed using RELAP5 based on reactor core display and reactor core physical analysis
Temperature field, pressure field and the Flow Field Distribution of lead bismuth coolant, core fuel temperature under steady-state operation, transient operation and accident conditions
Distribution, the especially axial temperature field distribution of liquid fuel component, so that it is determined that liquid fuel exhaust temperature, which will examine
Consider in solid fuel clad meltdown temperature hereinafter, simultaneously it is also contemplated that fuel temperature rises the negative-feedback effect brought；
S4, the security feature that Solid-liquid Mixed Fuel reactor is analyzed using nuclear power plant system analysis software RELAP5, into one
Step optimization liquid fuel modular construction and core structure design and configuration, it is as sharp as possible to ensure under particular incident operating mode
Residual heat of nuclear core is taken away with the liquid fuel package duct of emptying, keeps reactor in a safe condition, final design structure such as figure below
It is shown.According to specific reactor demand, it can suitably change core structure and relevant parameter (including the degree of enrichment of fuel, heap
Core size etc.), to meet corresponding target.Reactor core is using a point 4th area arrangement, including one outside reactor core active region, reactor core active region
The stainless steel shielded layer of the lead bismuth reflecting layer of a component thickness and outermost two circle.It is liquid fuel that reactor core active region is most intermediate
UBi, peripheral part are respectively the solid fuel uranium dioxide of different degree of enrichment；In order to improve the efficiency reactor control of control system
System processed is divided into two groups, and one group is used for shutdown for power regulation and another group.
S5, nuclear reactor is obtained as a result, being analyzed using RELAP5 based on reactor core display and reactor core physical analysis
Temperature field, pressure field and the Flow Field Distribution of lead bismuth coolant, core fuel temperature under steady-state operation, transient operation and accident conditions
Distribution, the especially axial temperature field distribution of liquid fuel component, so that it is determined that liquid fuel exhaust temperature, which will examine
Consider in solid fuel clad meltdown temperature hereinafter, simultaneously it is also contemplated that fuel temperature rises the negative-feedback effect brought.
S6, the security feature that Solid-liquid Mixed Fuel reactor is analyzed using nuclear power plant system analysis software RELAP5, into one
Step optimization liquid fuel modular construction and core structure design and configuration, it is as sharp as possible to ensure under particular incident operating mode
Residual heat of nuclear core is taken away with the liquid fuel package duct of emptying, keeps reactor in a safe condition, when utilization, design structure is as schemed
Shown in 2, Solid-liquid Mixed Fuel reactor core is wrapped up with containment.According to specific reactor demand, it can suitably change heap
Cored structure and relevant parameter (including the degree of enrichment of fuel, reactor core size etc.), to meet corresponding target.Heap in-core is most intermediate
Region belongs to liquid fuel, and pipeline and chemical processing plant can as needed be chemically treated liquid fuel.Work as appearance
After accident, liquid fuel is discharged into holding vessel by the material of burn through bottom, so that reactor is reached the subcritical of design, together
When can utilize material-changing water tank water be injected into the liquid fuel component of emptying, reactor core is cooled down.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (5)
1. Solid-liquid Mixed Fuel reactor core, which is characterized in that including the lead bismuth reflection outside reactor core active region, reactor core active region
Two layers of stainless steel shielded layer outside layer and lead bismuth reflecting layer；The reactor core active region is most intermediate to use liquid fuel, outer part
The solid fuel of different degree of enrichment is respectively adopted；And it is disposed with control rod and adjusting in the liquid fuel and solid fuel
Stick；When reactor core reaches certain temperature after accident generation, so that reactor is reached subcritical by the discharge of liquid fuel, utilize liquid
Pipeline after state fuel draining takes away part of waste heat.
2. Solid-liquid Mixed Fuel reactor core as described in claim 1, which is characterized in that after there is accident in reactor,
Liquid or gas etc. are injected by the liquid fuel component channel of the emptying into reactor core active region, takes away reactor core part of waste heat
Cooling reactor core.
3. Solid-liquid Mixed Fuel reactor core as described in claim 1, which is characterized in that the liquid fuel fires for liquid
Expect UBi, solid fuel is uranium dioxide.
4. Solid-liquid Mixed Fuel reactor core as described in claim 1, which is characterized in that the thickness in lead bismuth reflecting layer
For the thickness of a fuel assembly opposite side distance.
5. Solid-liquid Mixed Fuel reactor core as described in claim 1, which is characterized in that the reactor core can be according to reality
Border Demand Design is at different capacity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810577927.XA CN108806803B (en) | 2018-06-07 | 2018-06-07 | Solid-liquid mixed fuel reactor core |
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| CN201810577927.XA CN108806803B (en) | 2018-06-07 | 2018-06-07 | Solid-liquid mixed fuel reactor core |
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| CN108806803A true CN108806803A (en) | 2018-11-13 |
| CN108806803B CN108806803B (en) | 2021-08-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534213A (en) * | 2019-09-04 | 2019-12-03 | 哈尔滨工程大学 | A kind of cooling fuel combination reactor system of heat pipe |
| CN110853775A (en) * | 2019-11-21 | 2020-02-28 | 中国核动力研究设计院 | Multi-type fuel assembly mixed loading metal cooling reactor and management method |
| CN113270210A (en) * | 2021-05-21 | 2021-08-17 | 西安交通大学 | Lightweight heat pipe reactor core structure of low uranium loading |
| CN113674877A (en) * | 2021-07-15 | 2021-11-19 | 中国核动力研究设计院 | Lead-based fast reactor magnesium oxide reflecting layer assembly and lead-bismuth fast spectrum reactor core arrangement |
| RU2799708C2 (en) * | 2019-01-31 | 2023-07-10 | Сиборг Апс | Structural material for molten salt reactors |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2799708C2 (en) * | 2019-01-31 | 2023-07-10 | Сиборг Апс | Structural material for molten salt reactors |
| CN110534213A (en) * | 2019-09-04 | 2019-12-03 | 哈尔滨工程大学 | A kind of cooling fuel combination reactor system of heat pipe |
| CN110853775A (en) * | 2019-11-21 | 2020-02-28 | 中国核动力研究设计院 | Multi-type fuel assembly mixed loading metal cooling reactor and management method |
| CN113270210A (en) * | 2021-05-21 | 2021-08-17 | 西安交通大学 | Lightweight heat pipe reactor core structure of low uranium loading |
| CN113270210B (en) * | 2021-05-21 | 2022-10-25 | 西安交通大学 | Reactor core structure of lightweight heat pipe reactor with low uranium loading capacity |
| CN113674877A (en) * | 2021-07-15 | 2021-11-19 | 中国核动力研究设计院 | Lead-based fast reactor magnesium oxide reflecting layer assembly and lead-bismuth fast spectrum reactor core arrangement |
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| CN108806803B (en) | 2021-08-27 |
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