CN110867269B - Spent fuel dry-type storage vertical storage module - Google Patents
Spent fuel dry-type storage vertical storage module Download PDFInfo
- Publication number
- CN110867269B CN110867269B CN201911184097.5A CN201911184097A CN110867269B CN 110867269 B CN110867269 B CN 110867269B CN 201911184097 A CN201911184097 A CN 201911184097A CN 110867269 B CN110867269 B CN 110867269B
- Authority
- CN
- China
- Prior art keywords
- spent fuel
- storage tank
- ventilation
- vertical
- fuel storage
- 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
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/28—Treating solids
- G21F9/34—Disposal of solid waste
- G21F9/36—Disposal of solid waste by packaging; by baling
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Storage Of Harvested Produce (AREA)
Abstract
The invention provides a spent fuel dry-type storage vertical storage module, which comprises a concrete foundation fixed on the ground, wherein the foundation is provided with at least one accommodating space with a step surface, each accommodating space is used for detachably nesting and accommodating one end of the bottom of a corresponding vertical silo cylinder and a spent fuel storage tank, and the foundation is provided with at least one ventilation opening communicated with an airflow channel; the ventilation opening is used for introducing external air into the medium in the cooling spent fuel storage tank in the airflow channel after the cylinder body of the vertical silo and the spent fuel storage tank are nested in the foundation, and discharging the air after heat exchange to the outside through the top cover. The anti-tipping vertical silo with stable structure can ensure that the vertical silo and the internal spent fuel storage tank are still in a vertical stable storage state under the working condition of external natural accident, and avoid sliding, vibration and even tipping, thereby preventing the spent fuel storage tank from being damaged and radioactive substance from leaking.
Description
Technical Field
The invention relates to the field of spent fuel dry storage of nuclear power plants, in particular to a spent fuel dry storage vertical storage module.
Background
The vertical concrete silo (hereinafter referred to as the vertical concrete silo) for the dry-type storage of the spent fuel is used for storing and protecting a fuel storage tank which is sealed and loaded with a spent fuel assembly. As an important item of nuclear safety, the vertical concrete silo performs nuclear safety functions during long-term storage including: the spent fuel storage tank is structurally protected and radiation shielded, and an air convection passage is provided to fully cool the spent fuel storage tank.
The whole structure of the existing international widely and mature vertical concrete silo can be divided into a top cover, a cylinder body and a base. The top cap is the independent structure, passes through flange joint between top cap and the barrel, and barrel and base pass through welded connection. The cylinder body is of a concrete or steel shell structure and is used for providing a spent fuel storage tank structure and shielding protection. The spent fuel storage tank is freely located on the concrete silo base. The cylinder base and the top cover are provided with air inlet and exhaust channels. Cold air enters from the bottom air inlet, and hot air is discharged from the top air outlet and continuously discharges decay heat of the spent fuel assembly. For the vertical concrete silos of the above-mentioned structure, the main problems are: the spent fuel storage tank is freely located on the vertical concrete silo base, the concrete silo base is freely located on the ground, and due to the fact that the center of gravity of the whole silo is high, the concrete silo and the spent fuel storage tank can slide, vibrate or even tip over under the working conditions of flood and earthquake accidents, and radioactive substance leakage can be caused when the spent fuel storage tank is damaged.
Therefore, the prior art has defects and needs to be improved.
Disclosure of Invention
The invention provides an anti-tipping vertical storage module with a stable structure for spent fuel, aiming at the technical problem that the spent fuel storage tank is damaged possibly and radioactive substance leakage occurs in the prior art.
The technical scheme provided by the invention for the technical problem is as follows:
the invention provides a spent fuel dry-type storage vertical storage module, which comprises at least one vertical silo, wherein each vertical silo is used for storing a corresponding spent fuel storage tank, each vertical silo is provided with a cylinder body and a top cover which covers the cylinder body, an airflow channel is formed between each cylinder body and the side wall of each corresponding spent fuel storage tank, the spent fuel dry-type storage module also comprises a foundation which is fixed on the ground, the foundation is provided with at least one accommodating space with a step surface, each accommodating space is used for detachably nesting and accommodating one end of the bottom of the corresponding cylinder body and the corresponding spent fuel storage tank, and the foundation is provided with at least one ventilation opening which is communicated with the airflow channel; the ventilation opening is used for introducing external air into the medium in the cooling spent fuel storage tank in the airflow channel after the barrel and the bottom of the spent fuel storage tank are nested in the foundation, and discharging the air after heat exchange to the outside through the top cover.
According to the storage module, each accommodating space comprises an upper-level groove and a lower-level groove which is coaxially arranged with the upper-level groove, a lantern ring is embedded in the inner side wall of the lower-level groove, the lower end of the barrel is embedded and fixed in the upper-level groove, and the step surface of the upper-level groove is abutted to the bottom surface of the barrel and used for bearing the weight of the barrel; the lower end of the spent fuel storage tank is fixed in the lower-stage groove in a nested mode, and the spent fuel storage tank can be elastically and tightly hooped through the lantern ring arranged between the side wall of the spent fuel storage tank and the side wall of the lower-stage groove, so that the spent fuel storage tank is fixed.
According to foretell storage module, the ring shape step face is personally submitted to the step, the lantern ring includes ring body portion and a plurality of fixed partition along keeping away from respectively the extension of ring body portion center direction, the interval is seted up on the ring shape step face with each a plurality of lantern ring draw-in grooves that fixed partition is corresponding, each fixed partition with all be provided with the elastic component between the ring body portion, the elastic component is used for making each fixed partition can accept elastically in the lantern ring draw-in groove that corresponds, through the rigidity of ring body portion and each fixed partition in corresponding the interior extensibility of lantern ring draw-in groove is right but the fastening of elastic expansion is realized to spent fuel basin lower extreme.
According to the storage module, a plurality of ventilation grooves are further arranged on the annular step surface at intervals, each ventilation groove and each lantern ring clamping groove are arranged in a staggered and spaced mode, and the ventilation openings corresponding to the ventilation grooves are formed in the upper surface of the foundation surrounding the periphery of the upper-level groove.
According to the storage module, the number of the ventilation grooves is four, the circular ring-shaped step surfaces are penetrated by the tail end passages of the 4 ventilation grooves to form 4 mutually independent supporting step surfaces, and the passage between every two adjacent independent supporting step surfaces is used for respectively placing four L-shaped ventilation pipes; each ventilation pipe is partially inserted in the channel and communicated with each corresponding ventilation groove, one end of each ventilation pipe extends to the ventilation opening, the other end of each ventilation pipe extends to the inlet end of the airflow channel, outside air is guided into the airflow channel through each ventilation pipe and is discharged from the L-shaped air outlet on the top cover, a bent airflow channel from the ventilation opening to the air outlet is formed, and continuous guiding of decay heat of the spent fuel storage tank (200) is achieved through the bent airflow channel.
According to the storage module, the foundation is a concrete foundation, each ventilation pipe is an integrally formed metal component and is uniformly embedded in the concrete foundation concentrically to form the hidden ventilation groove in the concrete foundation; one end of each ventilation pipe is 1/4 circular arc in cross section and is used for being communicated with the surrounding atmosphere, and the other end of each ventilation pipe is a rectangular ventilation gallery in cross section and extends into the airflow channel between the cylinder and the internal spent fuel storage tank.
According to the storage module, the top cover is fixedly connected with the barrel through bolts, the top cover comprises a main cover plate, a fixed ring plate connected with the main cover plate, triangular rib plates used for connecting and supporting the main cover plate and the fixed ring plate, a storage tank fixed baffle arranged at the bottom of the main cover plate and L-shaped air outlets arranged in the main cover plate, the L-shaped air outlets comprise 4 air outlets which are uniformly distributed in the main cover plate in a concentric mode, the air inlet end of each L-shaped air outlet is located at the bottom of the main cover plate, the air exhaust end of each L-shaped air outlet is located on the side face of the main cover plate and serves as a final exhaust port, and each L-shaped air outlet is used for enhancing the decay of spent fuel heat and reducing the radiation dose of the area of the air outlet.
According to the storage module, the storage module comprises a plurality of vertical silos, the foundation is provided with accommodating spaces matched with the vertical silos, four ventilation openings are formed around each vertical silo on the foundation, each vertical silo and the four ventilation openings surrounding the periphery of the vertical silo form a vertical storage unit, and every two adjacent vertical storage units are in mirror symmetry.
According to the storage module, the storage module comprises a plurality of vertical silos, accommodating spaces matched with the vertical silos are formed in the foundation and used for accommodating each corresponding storage unit, the foundation is provided with a plurality of rows of vertical storage units, each row of vertical storage units consists of the same unit modules, and two adjacent storage units in each row are in mirror symmetry; the vertical storage unit of the (N + 1) th row is positioned in the area between two adjacent vertical storage units of the (N) th row and is in a staggered arrangement.
According to the storage module, the storage module comprises a plurality of vertical silos, the base is provided with accommodating spaces matched with the vertical silos for accommodating each corresponding storage unit, the storage units are arranged in a 45-degree surrounding manner, and the periphery of one storage unit is surrounded by 4 storage units with the same structure.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the vertical silo is fixedly connected to the foundation, so that the vertical silo with a stable anti-tipping structure is realized, and the vertical silo and the internal spent fuel storage tank can be ensured to be still in a vertical stable storage state under the working condition of external natural accident (such as flood and earthquake), thereby avoiding sliding, vibration and even tipping, further preventing the spent fuel storage tank from being damaged and radioactive substance from leaking. And the ventilation openings are arranged on the foundation surrounding the vertical silo, so that the external air is effectively introduced into the medium in the internal cooling spent fuel storage tank, and the air after heat exchange is discharged to the outside through the circulation channel, thereby ensuring the requirement of safe production.
Drawings
Fig. 1 is a schematic structural diagram of a vertical spent fuel storage module according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a concrete foundation according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a concrete foundation without an elastic member according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an elastic member according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a concrete foundation and a ventilation pipe provided in an uninstalled state according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a concrete foundation according to an embodiment of the present invention in a state of being fitted to a cylinder.
Fig. 7 is a schematic structural diagram of a concrete foundation, a cylinder and a spent fuel storage tank according to an embodiment of the present invention in a matching state.
Fig. 8 is a schematic structural diagram of a concrete foundation, a cylinder, a spent fuel storage tank, and a top cover according to an embodiment of the present invention.
Figure 9 is a schematic view of ventilation of the flow-through passage of a vertical silo storage module provided in accordance with an embodiment of the present invention.
Fig. 10 is a schematic diagram of a top cover structure according to an embodiment of the present invention.
Fig. 11 is a schematic view of the general arrangement of a vertical silo according to a first embodiment of the present invention.
Fig. 12 is a schematic diagram of a symmetrical arrangement of the overall arrangement of the vertical silo according to an embodiment of the present invention.
Fig. 13 is a schematic view of the overall arrangement of the vertical silo according to an embodiment of the present invention.
Fig. 14 is a schematic diagram of a 45 ° surrounding vertical silo in general arrangement according to an embodiment of the present invention.
Detailed Description
Various embodiments of the present disclosure will be described more fully hereinafter. The present disclosure is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit the various embodiments of the disclosure to the specific embodiments disclosed herein, but rather, the disclosure is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the disclosure.
An embodiment of the present invention provides a vertical spent fuel dry storage module, and referring to fig. 1, the vertical storage module includes: the vertical silo 100 is hollow inside, the vertical silo 100 is used for storing the corresponding spent fuel storage tank 200, each vertical silo has a cylinder body 101 and a top cover 102 covering the cylinder body, a gap is formed between each cylinder body 101 and the side wall of each corresponding spent fuel storage tank 200, the gap is used as an air flow channel 103, the structure is creatively fixed on a foundation 300, the foundation 300 is arranged on the ground, the foundation 300 is provided with accommodating spaces 301 with steps corresponding to the vertical silo 100, each accommodating space 301 is used for detachably nesting and accommodating one end of the bottom of the corresponding cylinder body 101 and the corresponding spent fuel storage tank 200, and the foundation 300 is provided with at least one vent 302 communicated with the air flow channel 103; each of the ventilation openings 302 is used for introducing the external air into the air flow channel 103 to cool the medium in the spent fuel storage tank 200 after the bottom of the barrel 101 and the spent fuel storage tank 200 are nested in the base 300, and discharging the heat-exchanged air to the outside through the top cover 102. According to the attached figure 1, the four ventilation openings 302 are formed around the corresponding vertical silo 100, and the four ventilation openings 302 are uniformly arranged around the vertical silo 100 at intervals, so that the uniform air inlet can be ensured, and the cooling effect is better.
Fig. 2 is a schematic view of a foundation structure, wherein each accommodating space 301 on the foundation 300 includes an upper groove 301a and a lower groove 301b coaxially disposed with the upper groove 301a, a collar 303 is embedded in an inner sidewall of the lower groove 301b, a lower end of the cylinder 101 is nested and fixed in the upper groove 301a, and a step surface of the upper groove 301a abuts against a bottom surface of the cylinder 101 for bearing the weight of the cylinder 101; the lower extreme nestification of spent fuel storage tank 200 is fixed in inferior stage recess 301b and can be through setting up the lantern ring 303 between the lateral wall of spent fuel storage tank 200 and inferior stage recess 301b lateral wall tightly hoop spent fuel storage tank 200 elastically, realize right the fixed of spent fuel storage tank 200, lantern ring 303 design are elastic construction, can extract the convenience and when needs are fixed, stable chucking spent fuel storage tank 200 does not rock.
Further referring to fig. 3, the step surface is a circular step surface, and fig. 4 is a schematic structural diagram of the collar 303, where the collar 303 includes a collar portion 303a and a plurality of fixed partition plates 303b extending along a direction away from a center of the collar portion 303a, a plurality of collar slots 304 corresponding to each fixed partition plate 303b are formed on the circular step surface at intervals, an elastic member 303c is disposed between each fixed partition plate 303b and the collar portion 303a, the elastic member 303c is used for elastically accommodating each fixed partition plate 303b in the corresponding collar slot 304, and the lower end of the spent fuel storage tank 200 is elastically fastened in a telescopic manner by rigidity of the collar portion 303a and extensibility of each fixed partition plate 303b in the corresponding collar slot 304. In one preferred embodiment of the present invention, four fixing partition plates 303b are disposed around the ring body 303a of each of the collars 303, the four fixing partition plates 303b are uniformly distributed around the ring body 303a at intervals and elastically engaged with the four collar slots 304 uniformly spaced one by one, and the fixing partition plates 303b uniformly disposed around have elasticity, so that the connection stability of the spent fuel storage tank 200 is ensured by automatic locking after the lower end of the spent fuel storage tank 200 is nested.
Further, with reference to the schematic view of the fitting installation state of the collar 303 and the ventilation pipe shown in fig. 5, according to the illustration of the drawing, a plurality of ventilation grooves 305 are further arranged on the circular step surface at intervals, each ventilation groove 305 and each collar clamping groove 304 are arranged in a staggered interval, and the ventilation openings 302 corresponding to each ventilation groove 305 are formed on the upper surface of the foundation 300 surrounding the periphery of the upper-level groove. The illustration in fig. 5 shows four ventilation ducts, four L-shaped ventilation ducts being fixed within the corresponding ventilation ducts. After the collar 303 and the ventilation pipe 400 are installed, the vertical silo 100 is seated on the step surface, referring to fig. 6 and 7, after the vertical silo 100 is fixed in the groove, the lower end of the spent fuel storage tank 200 is nested and clamped in the collar 303, and fig. 8 shows that the top cover 102 is covered on the barrel 101. According to the above drawings, the number of the ventilation grooves 305 is four, the circular ring-shaped step surfaces are penetrated by the end passages of 4 ventilation grooves 305 to form 4 mutually independent supporting step surfaces 306 (shown in fig. 3), and the passage between every two adjacent independent supporting step surfaces 306 is used for respectively placing four L-shaped ventilation pipes 400; each ventilation pipe 400 is partially inserted into the passage and is communicated with each corresponding ventilation slot 305, one end of each ventilation pipe 400 extends to the ventilation opening 302, the other end of each ventilation pipe 400 extends to the inlet end of the airflow passage 103, outside air is introduced into the airflow passage 103 through each ventilation pipe 400 and is discharged from the L-shaped air outlet on the top cover 102, as shown in fig. 9, fig. 9 shows a bent airflow passage formed from the ventilation opening 302 to the air outlet 102f, and continuous conduction of decay heat of the spent fuel storage tank 200 is realized through the bent airflow passage.
Further, in one embodiment of the present invention, the foundation 300 is a concrete foundation, and each ventilation pipe 400 is an integrally formed metal member concentrically and uniformly embedded in the concrete foundation, so as to form a hidden ventilation slot 305 in the concrete foundation; one end of each ventilation pipe 400 is shaped like 1/4 circular arc in cross section and is used for communicating with the surrounding atmosphere, and the other end of each ventilation pipe 400 is shaped like a rectangular ventilation gallery and extends into the airflow channel 103 between the barrel 101 and the internal spent fuel storage tank 200.
FIG. 10 is a schematic diagram of a top cover structure of the present invention, in which the top cover 102 is fixedly connected to the barrel 101 by bolts, the top cover 102 includes a main cover plate 102a, a fixing ring plate 102b connected to the main cover plate 102a, triangular ribs 102d for connecting and supporting the main cover plate 102a and the fixing ring plate 102b, a storage tank fixing baffle 102e disposed at the bottom of the main cover plate 102a, and L-shaped air outlets 102c disposed in the main cover plate 102a, the L-shaped air outlets 102c include 4 air outlets concentrically and uniformly distributed in the main cover plate 102a, an air inlet end of each L-shaped air outlet 102c is located at the bottom of the main cover plate 102a, an air outlet end of each L-shaped air outlet (the air outlet end of the L-shaped air outlet 102c is located at the side of the main cover plate 102a and serves as a final air outlet 102f, each L-shaped air outlet 102c is used for enhancing decay heat discharge of spent fuel while reducing radiation dose in an air outlet region, wherein the triangular ribs 102d of the top cover have four, the air outlets are evenly arranged at intervals, the air inlet ends of the L-shaped air outlets are arranged in the middle of the bottom of the main cover plate 102a and are designed into L-shaped bent ventilation channels, and therefore the air flow can be guaranteed to have a sufficient cooling effect.
According to the above description, the foundation of the present invention may be provided with a plurality of vertical silos 100, referring to fig. 11, the foundation 300 is provided with an accommodating space adapted to the plurality of vertical silos 100, the foundation 300 is provided with four ventilation openings 302 around each vertical silo 100, each vertical silo 100 and the four ventilation openings 302 around the periphery thereof form a vertical storage unit, and each two adjacent vertical storage units are in mirror symmetry, referring to fig. 12.
Referring to fig. 13, a foundation 300 is provided with an accommodating space adapted to the vertical silos 100 for accommodating each corresponding storage unit, the foundation 300 is provided with a plurality of rows of vertical storage units, each row of vertical storage units is composed of the same unit modules, and each row of two adjacent storage units are in mirror symmetry; the vertical storage unit of the (N + 1) th row is positioned in the area between two adjacent vertical storage units of the (N) th row and is in a staggered arrangement.
Referring to fig. 14, the foundation 300 is provided with an accommodating space adapted to the vertical silos 100 for accommodating each corresponding storage unit, each storage unit is arranged in a 45 ° surrounding manner, and the periphery of one storage unit is surrounded by 4 storage units with the same structure.
In conclusion, the core innovation of the invention is as follows: on the basis of the integrated concrete foundation, a groove with the same diameter as that of the vertical silo is arranged, and then the whole vertical silo is nested in the groove and has the characteristics of low gravity center and semi-underground nested storage structure; in order to ensure the stable structure of the spent fuel storage tank in the inner cavity of the silo, the bottom of the silo is provided with a fixed lantern ring for bearing the function of fixing and supporting the spent fuel storage tank. In order to ensure the safe derivation of decay heat of the spent fuel storage tank, a hidden ventilation pipe is arranged in the foundation groove and communicated with the external environment, so that the radiation dose of an air inlet area can be reduced while the safe air inlet is ensured.
To single vertical silo, only constitute by top cap and barrel, the top cap is located the barrel top, through bolt fixed connection, and inside C type air outlet and the spent fuel basin limiting plate of having set up of top cap for get rid of the decay heat of spent fuel subassembly, be used for fixed spent fuel basin top position simultaneously, prevent that the spent fuel basin from shaking, sliding. The cylinder body is a hollow 100% compact cylindrical structure and is used for bearing the functions of structural protection and radiation shielding of the internal spent fuel storage tank. The concrete foundation is provided with upper and lower circular grooves; the upper round groove is provided with an annular step, and the vertical silo is nested in the upper round groove and is located on the surface of the annular step. Circular recess of subordinate is used for bearing the weight of the spentnuclear fuel basin, has set up the fixed lantern ring in addition on circular recess of subordinate, and the lantern ring is equipped with all around fixedly and is used for carrying out the clamp to spentnuclear fuel basin fixedly. The ventilation pipe is designed in a hidden structure and is positioned inside the concrete foundation, so that the air inlet of the silo is communicated with the external environment.
The ventilation structure designed by the invention has good ventilation function, and when the vertical silo cylinder body is respectively arranged on the step surface of the upper-level circular groove and the spent fuel storage tank is arranged on the lantern ring in the lower-level circular groove, the ventilation characteristic is as follows according to the attached figure 9: the external cold air flows vertically downwards from the arc-shaped channel at the far end; then flows along an arc with the section of 1/4, rotates 90 degrees in direction and is adjusted to be horizontal; the air continues to flow along the hidden horizontal ventilation gallery in the concrete foundation; then enters an annular cavity between the vertical silo and the internal spent fuel storage tank, rotates 90 degrees in direction, and is adjusted to be in a vertical and upward direction. After the spent fuel assembly is heated by decay heat, cold air is converted into hot air, enters the top of an annular cavity between the vertical silo and the internal spent fuel storage tank, and rotates 90 degrees in direction; the air flow direction rotates 90 degrees again and enters the tail part of the L-shaped air outlet channel of the top cover; the air flow direction is rotated by 90 degrees again and enters the L-shaped air outlet channel head part of the top cover. The hot air is finally discharged from the L-shaped air outlet of the top cover, and then the decay heat of the spent fuel storage tank is continuously led out.
Furthermore, the top cover of the invention respectively comprises a main cover plate, a fixed ring plate, a triangular ribbed plate, a storage tank fixed baffle and an L-shaped air outlet. The size and the structural characteristic of the main cover plate are equal to the diameter of the inner cavity of the silo, and a circular boss is formed at the bottom of the main cover plate, so that the whole top cover can be fastened through the boss with the same size of the main cover plate after the top cover is arranged above the cylinder body, and the sealing performance of the cylinder body is ensured. The storage tank fixing baffle plates are positioned at the bottom of the main cover plate and are uniformly distributed concentrically, and the storage tank fixing baffle plates are 4 in total, are characterized by being positioned between the spent fuel storage tank and the cylinder body, and have the size basically the same as the gap between the spent fuel storage tank and the cylinder body, so that the top cover can be installed above the cylinder body to fix the top end of the spent fuel storage tank. 4L type air outlets, concentric evenly distributed is inside main apron, and the air inlet end of L type air outlet is located the top of spent fuel storage tank top cap, and the end of airing exhaust of L type air outlet is located the side of main apron. Through adopting L type air outlet design, help strengthening the decay heat of spent fuel and discharging, reduce the regional radiation dose of air outlet simultaneously. The cylinder body has a simple structure, is of a cylindrical structure with an annular section, is a densely filled structure and a shielding body from the top to the bottom, and can be made of concrete materials, metal materials or a combination of the concrete materials and the metal materials. During the storage process of the spent fuel, the cylinder body is nested inside the upper-level circular groove of the foundation. On the dimensional requirement, the wall thickness of the cylinder body is equal to the width of the annular step surface in the circular groove, so that the cylinder body can be completely seated on the annular step surface in the upper-level circular groove.
The upper-level circular groove is internally provided with a circular step surface, and the width of the step surface is the same as the thickness of the vertical silo cylinder, so that the weight of the vertical silo cylinder can be completely located on the step surface. The function is to nest the hollow cylindrical vertical silo, thereby realizing the fixation of the vertical silo and preventing the vertical silo from sliding and tipping under the working conditions of flood and earthquake accidents. On the other hand, the integral elevation of the vertical silo is reduced, the gravity center is reduced, and the integral stability of the structure is further enhanced. Considering the requirement of ventilation and heat exchange of the internal spent fuel storage tank, the annular step surface of the upper circular groove is penetrated by the tail end passages of the 4 ventilation grooves to form 4 mutually independent supporting step surfaces, and a passage between every two independent step surfaces is used for placing a ventilation pipe. The circular recess's of subordinate function is used for depositing the spentnuclear fuel basin, has set up the lantern ring simultaneously between circular slot and spentnuclear fuel basin, owing to the lantern ring cramps the spentnuclear fuel basin tightly, consequently can realize the fixed of spentnuclear fuel basin, prevents to produce under flood, earthquake accident operating mode spentnuclear fuel basin and slides and topple over. On the other hand, the overall elevation of the spent fuel storage tank is reduced, the gravity center is reduced, and the overall stability of the structure is further enhanced. The lantern ring draw-in groove is total 4, is located the step face of higher level's circular recess, through with in the fixed stop embedding lantern ring draw-in groove, prevents that the spent fuel basin of steel ring clamp from producing to slide and tumbling under flood, earthquake accident operating mode. Because cylindrical vertical silo nestification is in the circular slot, considers the ventilation heat transfer requirement, still is equipped with the hidden formula ventilation groove of four L types in concrete foundation slab inside, and the ventilation groove is 1/4 arc by one end section, and other end section is rectangular ventilation corridor, and the ventilation groove has run through the ring shape step face of higher level's circular recess for place the ventilation pipe. On the other hand, the L-shaped hidden ventilation groove has the characteristic of a labyrinth structure synchronously, so that the radiation dose of an air inlet at the bottom of the concrete silo can be reduced, and the radiation safety of operation operators is protected. The lantern ring is stored at the bottom of the second-stage circular groove and is positioned between the circular groove and the spent fuel storage tank. The steel ring and the 4 annular fixed partition plates are connected by welding. The steel ring is embedded into the lantern ring clamping groove, so that the spent fuel storage tank is prevented from sliding and tipping under the working conditions of flood and earthquake accidents. The ventilation pipe is the metal component of integrated machine-shaping, totally 4, and the concentric uniform embedding has formed the interior hidden ventilation groove of concrete foundation in the concrete foundation. In the structural composition, the section of one end of the ventilation pipe is 1/4 circular arc, and is communicated with the surrounding atmosphere, and the section of the other end of the ventilation pipe is a rectangular ventilation gallery and extends to the annular cavity between the vertical silo and the internal spent fuel storage tank. In the long-term storage process, external cold air can be introduced from the arc-shaped channel at the far end, then flows along the hidden horizontal ventilation gallery and enters the annular cavity between the vertical silo and the internal spent fuel storage tank, and the continuous discharge of decay heat of the spent fuel storage tank is realized. In another embodiment of the invention, a ventilation pipe can be omitted, and the bottom air inlet effect can be realized by relying on the ventilation groove.
The process operating scheme of the invention is illustrated as follows: firstly, a lantern ring is hung in a step surface clamping groove of a superior circular groove, and the lantern ring is finally located in a subordinate circular groove; the cylinder body is arranged on the step surface of the upper circular groove in a hanging manner; then the spent fuel storage tank is hung in a steel ring of a lantern ring and is hooped by the hoop, and finally the spent fuel storage tank is located in a lower-level circular groove, so that the lower end of the storage tank is fixed; the top cover hanger is arranged on the cylinder body, and then the top cover hanger and the cylinder body are fastened together through bolts. The fixing of the top end of the spent fuel storage tank is realized through the storage tank fixing baffle plate on the back of the top cover.
Another embodiment of the invention may employ a "semi-underground nested" anti-tipping storage scheme for the vertical silo. The spent fuel storage tank is characterized in that a circular groove is formed in a concrete foundation, a circular step surface is arranged in the groove, the width of the step surface is the same as the thickness of a vertical silo cylinder, the weight of the silo cylinder can be completely located on the step surface after the hollow vertical silo is nested, the spent fuel storage tank is fixed through semi-underground nested storage, and slippage, vibration and tipping under the working conditions of flood and earthquake accidents are prevented.
Further, the spent fuel storage tank adopts a fixing scheme of a semi-underground clamp type plus a top constraint support. The circular recess of subordinate is located subaerial promptly for the whole elevation of spentnuclear fuel storage tank reduces, and the focus reduces. Meanwhile, a lantern ring is arranged between the circular groove and the spent fuel storage tank to tightly hoop the spent fuel storage tank. For the top cover of the spent fuel storage tank, the storage tank fixing baffle is positioned at the bottom of the main cover plate, and after the top cover is installed, the storage tank fixing baffle is positioned between the spent fuel storage tank and the cylinder body so as to fix the top end of the spent fuel storage tank.
Furthermore, the vertical storage module adopts an underground hidden L-shaped ventilation structure design. Namely, the L-shaped ventilation pipe is embedded in the concrete foundation to form a hidden ventilation groove in the concrete foundation. One end of the ventilation pipe is in an 1/4 arc-shaped section and communicated with the surrounding atmosphere, and the other end of the ventilation pipe is in a rectangular ventilation gallery and extends to the annular cavity between the vertical silo and the internal spent fuel storage tank. And external cold air is introduced into an annular cavity between the vertical silo and the internal spent fuel storage tank from the arc-shaped channel at the far end, so that the continuous derivation of decay heat of the spent fuel storage tank is realized.
Further, the top cover adopts a built-in L-shaped ventilation structure design. The air inlet end of the L-shaped air outlet is positioned at the bottom of the main cover plate, namely above the top cover of the spent fuel storage tank, and the air outlet end of the L-shaped air outlet is positioned on the side surface of the main cover plate. Through adopting L type air outlet design, help strengthening the decay heat of spent fuel and discharging, reduce the regional radiation dose of air outlet simultaneously.
Further, the annular cavity between the cylinder and the storage tank adopts a non-blocking full-range ventilation design. Namely, the spent fuel storage tank adopts a fixing scheme of 'semi-underground clamp type' + 'top cover constraint support', so that no blocking object exists in an annular cavity area between the cylinder body and the storage tank, and non-blocking full-range ventilation can be realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A spent fuel dry-type storage vertical storage module comprises at least one vertical silo (100), each vertical silo (100) is used for storing a corresponding spent fuel storage tank (200), each vertical silo is provided with a cylinder body (101) and a top cover (102) covering the cylinder body, an air flow channel (103) is formed between each cylinder body (101) and the side wall of each corresponding spent fuel storage tank (200), the device is characterized by further comprising a base (300) fixed on the ground, wherein the base (300) is provided with at least one accommodating space (301) with a step surface, each accommodating space (301) is used for detachably nesting and accommodating one end of the bottom of the corresponding barrel body (101) and the spent fuel storage tank (200), the base (300) is provided with at least one ventilation opening (302) communicated with the airflow channel (103);
the ventilation opening (302) is used for introducing external air into the medium in the cooling spent fuel storage tank (200) in the airflow channel (103) after the barrel (101) and the bottom of the spent fuel storage tank (200) are nested in the base (300), and discharging the air after heat exchange to the outside through the top cover (102).
2. The reservoir module of claim 1, wherein each receiving space (301) comprises an upper-level groove (301a) and a lower-level groove (301b) coaxially arranged with the upper-level groove, a collar (303) is embedded in the inner side wall of the lower-level groove (301b), the lower end of the cylinder (101) is nested and fixed in the upper-level groove (301a), and the step surface of the upper-level groove (301a) abuts against the bottom surface of the cylinder (101) for bearing the weight of the cylinder (101);
the lower end of the spent fuel storage tank (200) is fixed in the lower-stage groove (301b) in a nested mode, the spent fuel storage tank (200) can be elastically and tightly hooped through the lantern ring (303) arranged between the side wall of the spent fuel storage tank (200) and the side wall of the lower-stage groove (301b), and the spent fuel storage tank (200) is fixed.
3. The reservoir module of claim 2, wherein the step face is a circular ring-shaped step face, the collar (303) comprises a ring body part (303a) and a plurality of fixed partition plates (303b) respectively extending in a direction away from the center of the ring body part (303a), a plurality of lantern ring clamping grooves (304) corresponding to the fixed partition plates (303b) are formed in the circular step surface at intervals, an elastic piece (303c) is arranged between each fixed partition plate (303b) and the annular body part (303a), the elastic piece (303c) is used for enabling each fixed baffle plate (303b) to be elastically accommodated in the corresponding lantern ring clamping groove (304), the lower end of the spent fuel storage tank (200) can be elastically, telescopically and tightly fastened through the rigidity of the ring body part (303a) and the extensibility of each fixed partition plate (303b) in the corresponding ring clamping groove (304).
4. The reservoir module as claimed in claim 3, wherein a plurality of ventilation grooves (305) are further formed on the annular step surface at intervals, each ventilation groove (305) and each collar fastening groove (304) are arranged in a staggered and spaced manner, and the ventilation openings (302) corresponding to each ventilation groove (305) are formed on the upper surface of the base (300) surrounding the periphery of the upper-level groove (301 a).
5. The reservoir module according to claim 4, wherein the number of the ventilation slots (305) is four, the circular ring-shaped step surface is penetrated by end passages of 4 ventilation slots (305) to form 4 mutually independent supporting step surfaces (306), and the passage between every two adjacent independent supporting step surfaces (306) is used for respectively placing four L-shaped ventilation pipes (400);
each ventilation pipe (400) is partially inserted in a channel and communicated with each corresponding ventilation groove (305), one end of each ventilation pipe (400) extends to the ventilation opening (302), the other end of each ventilation pipe (400) extends to the inlet end of the airflow channel (103), outside air is guided into the airflow channel (103) through each ventilation pipe (400) and is exhausted from the L-shaped air outlet (102c) on the top cover (102), a bent airflow channel from the ventilation opening (302) to the air outlet (102c) is formed, and the continuous guiding-out of the decay heat of the spent fuel storage tank (200) is realized through the bent airflow channel.
6. A storage module according to claim 5, characterized in that the foundation (300) is a concrete foundation and each ventilation duct (400) is an integrally formed metal element concentrically and uniformly embedded in the concrete foundation, forming the ventilation slot (305) hidden in the concrete foundation;
one end of each ventilation pipe (400) is 1/4 circular arc in cross section and is used for being communicated with the surrounding atmosphere, and the other end of each ventilation pipe (400) is a rectangular ventilation gallery in cross section and extends into the airflow channel (103) between the barrel (101) and the internal spent fuel storage tank (200).
7. The storage module according to claim 1, wherein the top cover (102) is fixedly connected with the barrel (101) through bolts, the top cover (102) comprises a main cover plate (102a), a fixed ring plate (102b) connected with the main cover plate (102a), triangular ribs (102d) for connecting and supporting the main cover plate (102a) and the fixed ring plate (102b), a storage tank fixing baffle plate (102e) arranged at the bottom of the main cover plate (102a), and L-shaped air outlets (102c) arranged in the main cover plate (102a), the L-shaped air outlets (102c) comprise 4 air outlets, the L-shaped air outlets are uniformly distributed in the main cover plate (102a) concentrically, the air inlet end of each L-shaped air outlet (102c) is positioned at the bottom of the main cover plate (102a), the air outlet end of each L-shaped air outlet (102c) is positioned at the side of the main cover plate (102a) and serves as a final air outlet (102f), each L-shaped air outlet (102c) is used for enhancing the decay heat discharge of the spent fuel and reducing the radiation dose of the air outlet area.
8. The storage module according to claim 1, comprising a plurality of vertical silos (100), wherein the foundation (300) is provided with a receiving space adapted to the plurality of vertical silos (100), four ventilation openings (302) are formed in the foundation (300) around each vertical silo (100), each vertical silo (100) and the four ventilation openings (302) around the periphery thereof form a vertical storage unit, and each two adjacent vertical storage units are in mirror symmetry.
9. The storage module according to claim 1, comprising a plurality of vertical silos (100), wherein the foundation (300) is provided with a receiving space adapted to the plurality of vertical silos (100) for receiving each corresponding storage unit, the foundation (300) is provided with a plurality of rows of vertical storage units, each row of vertical storage units is composed of the same unit modules, and each row of two adjacent storage units are in mirror symmetry;
the vertical storage unit of the (N + 1) th row is positioned in the area between two adjacent vertical storage units of the (N) th row and is in a staggered arrangement.
10. The storage module according to claim 1, comprising a plurality of vertical silos (100), wherein the base is provided with a receiving space adapted to the plurality of vertical silos (100) for receiving each corresponding storage unit, and each storage unit is arranged in a 45 ° surrounding manner, wherein the periphery of one storage unit is surrounded by 4 storage units with the same structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911184097.5A CN110867269B (en) | 2019-11-27 | 2019-11-27 | Spent fuel dry-type storage vertical storage module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911184097.5A CN110867269B (en) | 2019-11-27 | 2019-11-27 | Spent fuel dry-type storage vertical storage module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110867269A CN110867269A (en) | 2020-03-06 |
| CN110867269B true CN110867269B (en) | 2021-12-03 |
Family
ID=69656772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911184097.5A Active CN110867269B (en) | 2019-11-27 | 2019-11-27 | Spent fuel dry-type storage vertical storage module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110867269B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111430058B (en) * | 2020-03-18 | 2021-06-08 | 张云逢 | Deep well landfill disposal structure and method for high-radioactive nuclear waste |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0375599A (en) * | 1989-08-17 | 1991-03-29 | Toshiba Corp | Container for storing radioactive substance |
| JPH0427898A (en) * | 1990-05-23 | 1992-01-30 | Toshiba Corp | Fastening device for spent fuel storage rack |
| GB2337722A (en) * | 1998-05-29 | 1999-12-01 | Gec Alsthom Ltd | Dry storage vault |
| CN1734682A (en) * | 2004-03-18 | 2006-02-15 | 霍尔泰克国际股份有限公司 | Systems and methods for storing high level radioactive waste |
| CN102682865A (en) * | 2012-05-30 | 2012-09-19 | 清华大学 | Spent fuel storing container |
| CN102982854A (en) * | 2012-11-09 | 2013-03-20 | 中国核电工程有限公司 | Spent fuel storage module |
| CN104272398A (en) * | 2012-04-18 | 2015-01-07 | 霍尔泰克国际股份有限公司 | Storing and/or transferring high level radioactive waste |
| CN105280255A (en) * | 2015-09-17 | 2016-01-27 | 中广核工程有限公司 | Underground storage silo for storing nuclear power plant fuel storage tank |
| CN107658034A (en) * | 2017-10-20 | 2018-02-02 | 中国船舶重工集团公司第七〇九研究所 | A kind of overturn-preventing spent fuel storage device |
| CN109545410A (en) * | 2018-12-12 | 2019-03-29 | 深圳中广核工程设计有限公司 | Vertical, the horizontal dual-purpose car for spent fuel storage tank of storage |
| CN208752969U (en) * | 2018-08-21 | 2019-04-16 | 中广核工程有限公司 | Spent nuclear fuel in nuclear power plant dry storage horizontal type device and its component |
| CN209357469U (en) * | 2018-08-20 | 2019-09-06 | 深圳中广核工程设计有限公司 | Nuclear power station ventilating hole channel structure and spentnuclear fuel Dry storage device |
| KR102036458B1 (en) * | 2018-10-01 | 2019-10-24 | 한국수력원자력 주식회사 | Vertical type dry storage module for storing pressurized water reactor spent nuclear fuel and storage system comprising the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK3058574T3 (en) * | 2013-10-15 | 2020-03-09 | Rad Tech Medical System Llc | RADIO VOLTAGE MODULE WITH ADJUSTABLE BOTTOM FRAMES |
-
2019
- 2019-11-27 CN CN201911184097.5A patent/CN110867269B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0375599A (en) * | 1989-08-17 | 1991-03-29 | Toshiba Corp | Container for storing radioactive substance |
| JPH0427898A (en) * | 1990-05-23 | 1992-01-30 | Toshiba Corp | Fastening device for spent fuel storage rack |
| GB2337722A (en) * | 1998-05-29 | 1999-12-01 | Gec Alsthom Ltd | Dry storage vault |
| CN1734682A (en) * | 2004-03-18 | 2006-02-15 | 霍尔泰克国际股份有限公司 | Systems and methods for storing high level radioactive waste |
| CN104272398A (en) * | 2012-04-18 | 2015-01-07 | 霍尔泰克国际股份有限公司 | Storing and/or transferring high level radioactive waste |
| CN102682865A (en) * | 2012-05-30 | 2012-09-19 | 清华大学 | Spent fuel storing container |
| CN102982854A (en) * | 2012-11-09 | 2013-03-20 | 中国核电工程有限公司 | Spent fuel storage module |
| CN105280255A (en) * | 2015-09-17 | 2016-01-27 | 中广核工程有限公司 | Underground storage silo for storing nuclear power plant fuel storage tank |
| CN107658034A (en) * | 2017-10-20 | 2018-02-02 | 中国船舶重工集团公司第七〇九研究所 | A kind of overturn-preventing spent fuel storage device |
| CN209357469U (en) * | 2018-08-20 | 2019-09-06 | 深圳中广核工程设计有限公司 | Nuclear power station ventilating hole channel structure and spentnuclear fuel Dry storage device |
| CN208752969U (en) * | 2018-08-21 | 2019-04-16 | 中广核工程有限公司 | Spent nuclear fuel in nuclear power plant dry storage horizontal type device and its component |
| KR102036458B1 (en) * | 2018-10-01 | 2019-10-24 | 한국수력원자력 주식회사 | Vertical type dry storage module for storing pressurized water reactor spent nuclear fuel and storage system comprising the same |
| CN109545410A (en) * | 2018-12-12 | 2019-03-29 | 深圳中广核工程设计有限公司 | Vertical, the horizontal dual-purpose car for spent fuel storage tank of storage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110867269A (en) | 2020-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10861612B2 (en) | Apparatus for storing and/or transporting radioactive materials | |
| US11694817B2 (en) | System and method of storing and/or transferring high level radioactive waste | |
| US20190326028A1 (en) | Apparatus for storing and/or transporting high level radioactive waste, and method for manufacturing the same | |
| US11250963B2 (en) | Nuclear fuel storage facility | |
| KR102544946B1 (en) | Flood and Wind Resistant Ventilated Modules for Spent Nuclear Fuel Storage | |
| US4299659A (en) | Apparatus for storing self-heating radioactive materials | |
| CN110867269B (en) | Spent fuel dry-type storage vertical storage module | |
| CN108461167B (en) | Vertical silo for dry storage of spent fuel in nuclear power plant | |
| JPH07146392A (en) | Baffle plate for air-cooling | |
| CN111128422B (en) | Vertical centralized storage module combination for spent fuel | |
| JP3810589B2 (en) | Radioactive waste storage facility | |
| CN211530431U (en) | Prevent regulator cubicle of intaking | |
| JP2001235582A (en) | Cask for dry transport and storage of spent fuel, etc. | |
| US20220367078A1 (en) | Stackable nuclear waste storage system | |
| KR970011259B1 (en) | Nuclear fuel storehouse | |
| CN115265258A (en) | Double-layer storage well device for storing radioactive substance product cups | |
| CN211070728U (en) | Baking finish room is with firing burning furnace | |
| KR20240022621A (en) | Ventilated cask for nuclear waste storage | |
| CN117501383A (en) | Ventilation barrel for nuclear waste storage | |
| KR950008550Y1 (en) | Apparatus suppling air | |
| JP5346893B2 (en) | Radioactive material storage facility | |
| JPH062291U (en) | Vent pipe for concrete reactor containment vessel | |
| JP2008164388A (en) | Storage facility for radioactive waste |
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 |