JPH10297678A - Transport container of mixed oxide fuel, and method for transporting and temporarily storing the fuel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the high-temperature degradation during the temporary storage of a member, increase the intervals of maintenance, examination and exchange of the member, and to reduce the whole transport cost, by dropping the temperature of the inside of a transport container during the temporary storage. SOLUTION: A transport container comprises a long container body 11 to store the mixed oxide fuel, and a top lid for transport to cover one end side in the longitudinal direction of the container body 11 in which the top part side of the mixed oxide fuel is arranged during the transport, and is served for the transport and the temporary storage of the mixed oxide fuel. A lid 15 having a cooling mechanism 17 is also provided as a spare lid for the temporary storage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport container, a transport method, and a temporary storage for use in transporting a mixed oxide fuel body (MOX fuel body) having a heat generating property from, for example, a fuel processing facility to a nuclear power generation facility or the like. About the method.

[0002]

2. Description of the Related Art A MOX fuel body in which plutonium oxide and uranium oxide are mixed has a heat generation property unlike a fuel body made of uranium oxide. As one example of such a heat generating fuel body, a transport and storage container for a spent fuel having a configuration disclosed in, for example, JP-A-57-179699 is conventionally known.

FIG. 13 illustrates the structure of such a conventional transport container. The transport container 1 is composed of a long container main body 2 and a top cover 3 covering one longitudinal end thereof, and has a built-in basket for storing an MOX fuel body (not shown). A fin 4 for heat radiation is provided on the outer peripheral side of the container body 2, and an existing hole 5 such as a drain hole for discharging the internal fluid and some existing holes (not shown) for measurement are provided at the bottom. I have. Note that the top cover 3 also has some existing holes.

At the time of transportation, a bottom buffer 6 and a top buffer 7 which are detachably mounted on the bottom and top of the container body 2 and are mainly made of a non-thermally conductive member are installed. In addition, the top cover 3 and the like are configured such that a structure having a weak strength such as a pipe projecting from the cover wall cannot be installed. Therefore, the bottom of the container body 2 and the top cover 3 for normal transportation do not always have an effective heat radiation function from the inside of the container to the outside. Therefore, heat generated from the fuel body during transportation is mainly transferred from an internal structure such as a basket (not shown) by heat conduction to the container body 2.
And is released to the outside by the radiating fins 4, but is made of a bottom buffer 6 and a top buffer 7 made of a non-thermally conductive material.
From the viewpoint of the existence and the strength described above, heat is not easily radiated from the normal top cover 3 or the bottom of the container body 2.

In transporting a new MOX fuel assembly, various measures against vibration are required, unlike transport of a spent fuel assembly. For example, the MOX fuel body is put in a protection container (not shown), and the protection container is further stored in a basket and put in the transport container 1 for transportation.
The X fuel body must be securely fastened to the protective container, and the protective container must be firmly restrained by the basket. In addition, there is a demand to avoid direct contact between the MOX fuel body and other metals. For this reason, in transporting MOX fuel assemblies, various materials that cannot be used for a sufficiently long time, that is, semi-permanently at high temperatures, such as rubber materials, resin materials, or metal members of sliding parts such as fastening devices, are transported. There is a situation that it has to be used inside the container. Therefore, these members must be regularly inspected during use and replaced as necessary.

[0006] By the way, when assuming a transportation process of the MOX fuel body, it is easy to understand that the MOX fuel body is not stored in the transportation container only for the transportation period between the transportation starting point and the destination. Can be estimated. For example, in a state where the MOX fuel body is stored in the transport container, for example, a standby period from the loading of the MOX fuel body to the transport container to the start of transfer, or a standby period from arrival at the destination to removal of the MOX fuel body. A so-called temporary storage period always occurs. The temporary storage period will vary depending on the transport conditions, but in some cases may be equal to or longer than the transfer period. If the temporary storage period is prolonged with respect to the transfer period, the above-mentioned members are degraded at high temperature and the life is shortened.

[0007] In the conventional fuel transport container and the fuel transport and temporary storage method, there is no example in which measures have been taken in consideration of the deterioration of the internal members during the temporary storage described above.

[0008]

In the transportation of MOX fuel bodies, various materials that cannot be used for a sufficiently long time, that is, semi-permanently at high temperatures, have to be used inside the transportation container. Therefore, if the period of the temporary storage is prolonged and the period of the high-temperature state is prolonged, these members are deteriorated at a high temperature and the life is shortened.

The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the temperature inside the transport container at the time of temporary storage so as to reduce the high temperature deterioration of the member at the time of temporary storage. Maintenance, inspection,
It is an object of the present invention to provide a transport container and a transport / temporary storage method for a mixed oxide fuel body, which can extend a replacement interval and reduce the overall transport cost.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, a long container body for storing a mixed oxide fuel body and a top side of the mixed oxide fuel body are arranged. A transport top cover for covering one end in the longitudinal direction of the container body during transport, and a transport container for transporting and temporarily storing the mixed oxide fuel body, in addition to the transport top lid, for temporary storage. Provided is a transport container for a mixed oxide fuel body, which also has a lid with a cooling function as a spare lid.

According to a second aspect of the present invention, in the transport container for a mixed oxide fuel body according to the first aspect, the preliminary lid for temporary storage includes:
A take-out hole for taking out the internal gas of the container body outward, a cooling mechanism for cooling the internal gas taken out from the take-out hole, and an intake hole for taking the cooled internal gas back into the container body The present invention provides a transport container for a mixed oxide fuel body, which has a function of forcibly circulating the internal gas of the container body to the external cooling mechanism for cooling.

According to a third aspect of the present invention, in the transport container for a mixed oxide fuel body according to the first aspect, the preliminary lid for temporary storage includes:
Provided is a transport container for a mixed oxide fuel body, which has a function of directly removing heat from the internal gas of a container body and releasing the heat to the outside, and enables cooling without circulating the internal gas of the container body to the outside. I do.

According to a fourth aspect of the present invention, in the transport container for a mixed oxide fuel body according to the first aspect, the preliminary lid for temporary storage includes:
A transport container for a mixed oxide fuel body having an inward fin facing an inner side of a container body and having an outward fin facing an outer side of the container body.

According to a fifth aspect of the present invention, in the transport container for a mixed oxide fuel body according to the first aspect, the preliminary lid for temporary storage includes:
Provided is a transport container for a mixed oxide fuel body having a large number of heat pipes protruding on an inner side and an outer side of a container body.

In the invention of claim 6, a loading step of loading the mixed oxide fuel body into the transport container, a transfer step of transporting the transport container, and storing the fuel body in the transport container before, during, or after the transport. And a temporary storage step of temporarily storing the mixed oxide fuel body, wherein the loading step further comprises a temporary storage auxiliary lid having a cooling function in addition to the transport top lid. In the transfer step, the original transport top lid is used as the top lid of the transport container, and in the temporary storage step, the original transport top lid is temporarily stored with a cooling function. A method for transporting and temporarily storing a mixed oxide fuel body, characterized in that the temporary gas storage lid is used to cool and store the internal gas of the transport container instead of the lid.

According to a seventh aspect of the present invention, in the method for transporting and temporarily storing a mixed oxide fuel body according to the sixth aspect, in the temporary storing step, the top cover for transportation is replaced with a spare lid for temporary storage according to the second aspect, A method for transporting and temporarily storing a mixed oxide fuel body, characterized in that the internal gas of a transport container is forcibly circulated to an external cooling mechanism and stored while being cooled.

According to an eighth aspect of the present invention, in the method for transporting and temporarily storing a mixed oxide fuel body according to the sixth aspect, in the temporary storing step, the top cover for transportation is replaced with a spare lid for temporary storage according to the third aspect, A method for transporting / temporarily storing a mixed oxide fuel body, characterized in that the internal gas in a transport container is cooled and stored without being taken out of the transport container.

According to a ninth aspect of the present invention, in the method for transporting and temporarily storing a mixed oxide fuel body according to the sixth aspect, in the temporary storing step, the top cover for transportation is replaced with a spare lid for temporary storage according to the fourth aspect, A method for transporting / temporarily storing a mixed oxide fuel body, characterized in that the internal gas in a transport container is cooled and stored without being taken out of the transport container.

According to a tenth aspect of the present invention, in the transport / temporary storage method for a mixed oxide fuel assembly according to the sixth aspect, in the temporary storage step, the transport top lid is replaced with a temporary storage preliminary lid according to the fifth aspect, A method for transporting / temporarily storing a mixed oxide fuel body, characterized in that the internal gas in a transport container is cooled and stored without being taken out of the transport container.

According to the eleventh aspect of the present invention, there is provided a transport container for covering a long container body for storing a mixed oxide fuel body and one longitudinal end of the container body on which a top side of the mixed oxide fuel body is disposed during transportation. A transport container for transporting and temporarily storing the mixed oxide fuel body, having a top cover, and taking in and taking out internal gas of the container body into and from the container body or the top cover. A transport container for a mixed oxide fuel body, characterized in that a hole is provided and the internal gas inlet / outlet is connected to a circulating system cooling mechanism provided outside the container body.

According to a twelfth aspect of the present invention, a loading step of loading a mixed oxide fuel body into a transport container, a transfer step of transferring the transport container, and storing the fuel body in the transport container before, during, or after the transfer. Transporting and temporarily storing the fuel body, comprising:
In the loading step, a fuel body is loaded in a fuel transport container having the internal gas intake / inlet of claim 11 in a container body or a top cover, and in the temporary storage step, a circulating system cooling mechanism is separately provided in the internal gas intake / inlet. And a method for transporting and temporarily storing the mixed oxide fuel body, wherein the internal gas is forcibly circulated to an external cooling mechanism and stored while cooling.

According to a thirteenth aspect of the present invention, a loading step of loading a mixed oxide fuel body in a transport container, a transfer step of transporting the transport container, and storing the fuel body in the transport container before, during, or after the transport. Transporting and temporarily storing the fuel body, comprising:
In the temporary storage step, existing holes such as a drain hole and a measurement hole provided for maintaining the original function of the transport container are connected to an external circulating system cooling mechanism. And transporting and temporarily storing the mixed oxide fuel body, wherein the mixed oxide fuel body is forcibly circulated to an external cooling mechanism and stored while being cooled.

According to a fourteenth aspect of the present invention, there is provided a transport container for covering a long container body for storing a mixed oxide fuel body and one longitudinal end of the container body on which a top side of the mixed oxide fuel body is disposed during transportation. A transport container for transporting and temporarily storing the mixed oxide fuel body having a top lid, in which a basket as a fuel body storage part is housed in the container body, and an internal gas flows through a bottom plate of the basket. A transport container for a mixed oxide fuel body, characterized in that a gas flow hole for causing the mixed oxide fuel body is provided.

According to a fifteenth aspect of the present invention, a loading step of loading a mixed oxide fuel body into a transport container, a transfer step of transporting the transport container, and storing the fuel body in the transport container before, during, or after the transport. Transporting and temporarily storing the fuel body, comprising:
In the loading step, there is provided a method for transporting and temporarily storing a mixed oxide fuel body, wherein the fuel body is housed in a fuel transport container containing a basket according to claim 14.

In the sixteenth aspect of the present invention, claims 6 to 10 and 1
16. The method for transporting and temporarily storing a mixed oxide fuel body according to 2, 13, or 15, wherein in the loading step, the fuel body is housed in a top-open type fuel body protection container having a window and no top cover. Transport and transport of mixed oxide fuel assemblies
Provide a temporary storage method.

In the seventeenth aspect of the present invention, the sixth, seventh, and first aspects are provided.
In the transport / temporary storage method for a mixed oxide fuel assembly according to 2, 13, 15 or 16, in the temporary storage step, the internal gas intake / exhaust hole for connecting the circulating system cooling mechanism has an upper portion on the intake side and an upper portion on the intake side. Mixed oxidation characterized in that the transport container is inclined from the horizontal or vertical state so as to be at the bottom, and the internal gas in the transport container is forcibly circulated to an external cooling mechanism and stored while being cooled. Transportation of fuel
Provide a temporary storage method.

[0027]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First Embodiment (FIGS. 1 to 4) FIG. 1 shows a state in which a transport container according to the present embodiment is arranged in a horizontally long state at the time of transfer, and FIG. The state of is shown.

As shown in FIG. 1, the transport container 10 of the present embodiment has a long container main body 11 and a normal top cover 12 for transportation covering one longitudinal end thereof. Fins 13 for heat radiation are provided on the outer peripheral side. The transport container lid 12 has a structure that seals the inside of the container body 11. An existing hole 14 such as a drain hole is present at the bottom of the container body 11.

In the transport container 11 of the present embodiment, FIG.
As shown in (1), a temporary storage spare lid 15 having a cooling function is also provided.

That is, the temporary storage spare lid 15 is
A take-out hole 16 for taking out the internal gas of the container body 11 to the outside, a cooling mechanism 17 for cooling the internal gas taken out from the take-out hole 16, and a cooling mechanism 17 for taking the cooled internal gas into the container body 11 again. And an intake hole 18. The cooling mechanism 17 includes a pipe 19 for circulating the internal gas, a blower 20 for circulating the internal gas provided in the pipe 19, and a radiator 21.

When transporting and temporarily storing the MOX fuel body using such a transport container 10, in the loading step and the transport step shown in FIG. 1, the transport is performed in a horizontal state using the normal transport top lid 12. I do. In this case, the non-thermally conductive top buffer 22a and the bottom buffer 2
2b is installed. The heat generated inside the transport container 10 by the buffers 22a and 22b is unlikely to flow in the longitudinal direction, is transmitted to the container body 11 mainly by heat conduction, and is released to the outside via the radiation fins 13.

In the temporary storage step, the top buffer 22
a and the normal transport top lid 12 are removed, and a temporary storage spare lid 15 with a cooling mechanism 17 is attached as shown in FIG. 2, and the transport container 10 is set in a vertical state.

When the transport container 10 is temporarily stored in this state, part of the heat generated inside the transport container 10 is transmitted to the container body 11 mainly by heat conduction, and is released to the outside through the radiation fins 13. You. On the other hand, the warmed internal gas rises inside the transport container 10, so that the temperature of the upper portion of the transport container 10 is easily increased, but in the present embodiment,
The internal gas in the upper portion of the transport container 10 that has become hot is discharged into the discharge hole 1.
From 6, the air is forcibly circulated to the cooling mechanism 17 via the pipe 19 by the blower 20, cooled by the heat radiating device 21, and returned into the transport container 10 through the intake hole 18. In FIG. 2, the arrow a indicates the direction of the flow of the gas inside the transport container 10, and the dashed arrow b indicates the flow of the coolant fluid. Here, as an example, the radiator 21 may be a finned tube that flows a high-temperature internal gas into the inside and blows the atmosphere to the outside.

Therefore, in addition to the heat radiation from the heat radiation fins 13, the heat radiation by the forced circulation of the internal gas is performed,
The temperature inside the transport container 10 can be lowered as compared with the time of transport. Accordingly, it is possible to prevent high-temperature deterioration of the various members used inside the transport container 10 during temporary storage, to increase the intervals of maintenance, inspection, replacement, and the like of these members, and to reduce the transportation cost as a whole. It can be reduced.

FIG. 3 shows a modification of this embodiment. In this example, as a means for returning the internal gas cooled by the cooling mechanism 17 to the transport container 10, a pipe 19 on the gas outlet side of the radiator 21 is connected to the existing hole 14 existing at the bottom of the transport container 10. That is, the high temperature internal gas is taken out from the take-out hole 16 of the temporary storage spare lid 15, cooled by the cooling mechanism 17, and then returned to the container bottom through the existing hole 14 in the container bottom.

According to such a configuration, after the cooled gas is taken into the bottom of the container body 11, the gas rises while taking the heat from the MOX fuel body (not shown) and rises to reach the top of the container. In this respect, the temperature of the inside of the transport container 10 is lowered, so that a more effective cooling action is performed than in the example of FIG.

FIG. 4 shows a state in which the transport container 10 is temporarily stored in a horizontal state according to the convenience of the storage place. According to the use in such a state, the state of the gas flow is slightly inferior to the state of FIGS. 2 and 3,
As compared with the prior art, a sufficiently effective cooling effect can be obtained.

Second Embodiment (FIG. 5) FIG. 5 shows a second embodiment of the present invention.

In the transport container 10 of the present embodiment, the temporary storage spare lid 15 has a function of directly removing heat from the high-temperature gas inside the container body 10 and releasing the heat to the outside.

That is, in this embodiment, the inward fins 23a are provided inside the temporary storage spare lid 15 inside the transport container, and the outward fins 23b are provided outside. Then, without taking out the internal gas of the transport container 10 to the outside of the container, heat is taken by the inward fins 22a and released to the outside of the container by the outward fins 22b.

Using the transport container 10 having such a structure, M
When transporting and temporarily storing the OX fuel assembly, in the transfer process, the normal transport container top cover 22a shown in FIG.
In the temporary storage step, a temporary storage spare lid 15 shown in FIG. 5 is used. Thereby, the temperature inside the transport container 10 during temporary storage can be lowered, and substantially the same effect as in the first embodiment can be obtained.

Third Embodiment (FIG. 6) FIG. 6 shows a third embodiment of the present invention.

In the transport container 10 of this embodiment, a number of heat pipes 24 are provided on the temporary storage spare lid 15 so as to penetrate the lid wall and protrude inside and outside the container. As a result, heat is directly removed from the high-temperature gas inside the transport container 10 and released to the outside.

When transporting and temporarily storing the MOX fuel body using the transport container 10 having such a configuration,
In the transfer step, a normal top lid of a transport container (not shown) is used, but in the temporary storage step, a temporary storage spare lid 24 shown in FIG. 6 is used. Thereby, the temperature inside the transport container 10 during temporary storage can be lowered, and substantially the same effect as in the first embodiment can be obtained.

Fourth Embodiment (FIG. 7) FIG. 7 shows a fourth embodiment of the present invention.

In the fuel transport container 10 of this embodiment, internal gas inlet / outlet holes 25 and 26 which can be opened and closed are provided in the usual top cover 12 for transport or the container body 11. The external blower 2 is inserted into these internal gas inlet / outlet holes 25 and 26.
7. A circulating system cooling mechanism 30 having a radiator 28 and a pipe 29 is connected.

In this embodiment, in any of the fuel loading step, the transfer step, and the temporary storage step, a dedicated internal gas inlet / outlet 2 for connecting to the circulating system cooling mechanism 30 is provided.
A transport container 10 having 5, 26 is used. In the temporary storage step, as shown in FIG. 7, a circulating system cooling mechanism 30 having a blower 26 and a radiator 28 is connected to the dedicated internal gas inlet / outlet holes 25 and 26, and the internal gas of the transport container 10 is Forcibly circulate and cool.

According to the present embodiment, in addition to the same effects as those of the above-described first embodiment, the top cover 12 is
Since there is no need to replace with another spare lid at the time of temporary storage, the work process of temporary storage can be greatly reduced.

Note that, as shown in FIG.
If the existing hole 14 is present at the bottom of the hole, the existing hole 14 may be used instead of one of the two types of dedicated internal gas inlet / outlet, that is, the internal gas inlet / outlet 26 in this case. .

Fifth Embodiment (FIGS. 8 and 9) FIG. 8 shows a basic configuration example of a fifth embodiment of the present invention.
Shows a modified example thereof.

In the present embodiment, the transport container 10 is used in any of the loading step, the transfer step, and the temporary storage step of the MOX fuel body. However, in the temporary storage step, as shown in FIG. 8, existing holes 14 such as drain holes and measurement holes existing for maintaining the original function of the transport container are provided.
A circulation system cooling mechanism 30 similar to that of the fourth embodiment is connected to a and b to forcibly circulate and cool the gas inside the transport container 10.

According to this embodiment, although the cooling capacity is limited due to the use of the existing holes, substantially the same effects as in the third embodiment can be obtained.

FIG. 8 shows a case where the existing hole 14a usable as a take-out hole is present in the top cover 12, but as shown in FIG. May be used if it exists near the top of the.

Sixth Embodiment (FIG. 10) FIG. 10 shows a sixth embodiment of the present invention.

The transport container 10 of the present embodiment comprises a container body 1
A gas flow hole 33 communicating with an internal space 32 of the basket 31 is formed in a bottom plate portion of the basket 31 which is a MOX fuel body storage portion housed in the basket 1.

In the fuel transport / temporary storage method of the present embodiment,
The transport container 10 is used in any of the MOX fuel body loading step, transfer step and temporary storage step. In the temporary storage step, as shown in FIG. This is particularly effective when the internal gas is forcibly circulated for cooling.

That is, the internal gas cooled by the cooling mechanism 30 and returned to the bottom of the transport container is transferred to the internal space 32 of the basket 31 containing the MOX fuel body (not shown) due to the presence of the internal space 32 of the basket 31. It can easily flow in. Therefore, the cooled internal gas easily comes into direct contact with the fuel body, and exhibits a remarkable effect particularly in lowering the temperature of the fuel body.

Seventh Embodiment (FIG. 11) FIG. 11 shows a seventh embodiment of the present invention.

In the present embodiment, in the method of transporting and temporarily storing the MOX fuel body, in the loading step of the MOX fuel body into the transport container 10, the MOX fuel body is provided with the window 34 and the top 35 is opened at the top 35 without a lid. After being stored in the mold protection container 36, it is loaded into the internal space 32 of the basket 31.

In the temporary storage step, as shown by way of example, the transport container 10 is connected to an external circulating system cooling mechanism 30, and the internal gas is forcibly circulated and cooled. The cooled internal gas flows into the inside of the protection container 36 from the window 34 of the protection container 36, rises inside the fuel protection container 36 while directly contacting a MOX fuel body (not shown) and taking heat, and there is no lid. It flows out of the protective container 36 from the top 35,
It circulates again to the circulation system cooling mechanism 30.

When a protective container having a lid at the top is used, high temperature internal gas easily stays at the top of the protective container, so that the temperature of the upper part of the MOX fuel body easily rises. According to the present embodiment, The occurrence of such an event can be avoided, and the temperature can be lowered over the entire length of the MOX fuel body.

Eighth Embodiment (FIG. 12) FIG. 12 shows an eighth embodiment of the present invention.

In the present embodiment, when the method of transporting and temporarily storing the MOX fuel body is performed, in the temporary storage step, removal of the existing holes 14a and 14b as the internal gas intake and connection holes for connecting the circulation system cooling mechanism 30 is performed. The transport container 10 is tilted from a horizontal state or a vertical state so that the hole 14a is on the upper side and the intake hole 14b is on the lower side, and the gas inside the transport container 10 is forcibly circulated to the external cooling mechanism 30 for cooling. It is something to keep while doing.

Depending on the equipment at the temporary storage location, there may be circumstances in which it is desired to store the fuel transport container 10 that has been transferred in a horizontal state as it is. In such a case,
In the present embodiment, as described above, by setting the transport container 10 in the inclined state, the gas inside the transport container 10 can easily flow inside the container, and the cooling effect inside the container can be improved.

[0066]

As described above, according to the transport container for mixed oxide fuel bodies according to the first, second, third, fourth, fifth, eleventh, and fourteenth aspects of the present invention, the interior of the transport container is temporarily stored during storage. It is easy to lower the temperature, it is easy to prevent high temperature deterioration during temporary storage of various components used inside, and maintenance, inspection,
The replacement interval can be extended, and the overall transportation cost can be reduced.

Further, according to claims 6, 7, 8, 9, 1 of the present invention.
According to the transport / temporary storage method for mixed oxide fuel bodies according to 0, 12, 13, 15, 16, and 17, the temperature of the interior of the transport container is reduced more efficiently at the time of temporary storage, and various types of materials used therein are used. It is easy to prevent high-temperature deterioration during temporary storage of the members, it is possible to increase the intervals of maintenance, inspection, and replacement of these members, and it is possible to reduce the overall transportation cost.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a transport container for a MOX fuel body according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a transport container of the MOX fuel body according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a transport container of the MOX fuel body according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a transport container for a MOX fuel body according to the first embodiment of the present invention.

FIG. 5 is a sectional view showing a transport container for a MOX fuel body according to a second embodiment of the present invention.

FIG. 6 is a sectional view showing a transport container for a MOX fuel body according to a third embodiment of the present invention.

FIG. 7 is a sectional view showing a transport container for a MOX fuel body according to a fourth embodiment of the present invention.

FIG. 8 is a sectional view showing a transport container for a MOX fuel body according to a fourth embodiment of the present invention.

FIG. 9 is a sectional view showing a transport container for a MOX fuel body according to a fifth embodiment of the present invention.

FIG. 10 is a sectional view showing a transport container for a MOX fuel body according to a sixth embodiment of the present invention.

FIG. 11 is a sectional view showing a transport container for a MOX fuel body according to a seventh embodiment of the present invention.

FIG. 12 is a sectional view showing a transport container for a MOX fuel body according to an eighth embodiment of the present invention.

FIG. 13 is a sectional view showing a conventional transport container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transport container 2 Container main body 3 Top lid 4 Fin 5 Existing hole 6 Bottom buffer 7 Top buffer 10 Transport container 11 Container main body 12 Transport top lid 13 Fin 14 (14a, 14b) Existing hole (internal gas taking-in / out hole) 15 Temporary storage spare lid 16 Removal hole 17 Cooling mechanism 18 Intake hole 19 Pipe 20 Blower 21 Heat radiator 22a Top buffer 22b Bottom buffer 23a Inward fin 23b Outward fin 24 Heat pipe 25, 26 Internal gas take-in / out hole 27 Blower 28 Heat dissipating device 29 Piping 30 Circulating system cooling mechanism 31 Basket 32 Internal space 33 Gas flow hole 34 Window 35 Top 36 Top-open protective container

Claims (17)

[Claims] 1. A long container body for storing a mixed oxide fuel body, and a transport top cover for covering one longitudinal side of the container body on which a top side of the mixed oxide fuel body is disposed during transportation. A transport container for transporting and temporarily storing the mixed oxide fuel assembly, wherein the transportable temporary lid is provided with a cooling function lid as a temporary storage spare lid in addition to the transport top lid. Transport container for waste fuel. 2. The container for transporting mixed oxide fuel according to claim 1, wherein the preliminary lid for temporary storage has a take-out hole for taking out the internal gas of the container body outward, and the take-out hole taken out from the take-out hole. A cooling mechanism for cooling the internal gas,
Having an intake hole for taking the cooled internal gas back into the container main body, whereby the internal gas of the container main body can be forcibly circulated to the external cooling mechanism and cooled. Transport container for mixed oxide fuel body. 3. The container for transporting a mixed oxide fuel body according to claim 1, wherein the temporary storage spare lid has a function of directly removing heat from the internal gas of the container main body and discharging the heat to the outside, and the container main body. A transport container for mixed oxide fuel bodies, which allows cooling of the internal gas without circulating to the outside. 4. The container for transporting a mixed oxide fuel body according to claim 1, wherein the temporary storage spare lid has an inward fin facing an inner side of the container body and an outer fin facing an outer side of the container body. A transport container for a mixed oxide fuel body having oriented fins. 5. The mixed oxide fuel body transport container according to claim 1, wherein the temporary storage spare lid is a mixed oxide fuel body having a number of heat pipes protruding inside and outside the container body. Transport container. 6. A loading step of loading a mixed oxide fuel body into a transport container, a transfer step of transporting the transport container, and waiting before and after or during the transport while the fuel body is stored in the transport container. In the method for transporting and temporarily storing a mixed oxide fuel body comprising a temporary storage step, in the loading step, the fuel body is provided in the transport container having a temporary storage spare lid having a cooling function in addition to a transport top lid. In the transfer step, the original transport top lid is used as the top lid of the transport container, and in the temporary storage step, the original transport top lid is replaced with a temporary storage spare lid with a cooling function, A method for transporting and temporarily storing mixed oxide fuel bodies, wherein the internal gas in the transport container is stored while cooling the internal gas of the transport container with the temporary storage spare lid. 7. The transport / temporary storage method for a mixed oxide fuel body according to claim 6, wherein in the temporary storage step, the transport top lid is replaced with the temporary storage preliminary lid according to claim 2, and the inside of the transport container is replaced. A method for transporting and temporarily storing a mixed oxide fuel body, wherein the gas is forcibly circulated to an external cooling mechanism and stored while being cooled. 8. The transport / temporary storage method for a mixed oxide fuel assembly according to claim 6, wherein in the temporary storage step, the transport top lid is replaced with the temporary storage preliminary lid according to claim 3, and the inside of the transport container is replaced. A method for transporting and temporarily storing a mixed oxide fuel body, wherein the mixed oxide fuel body is cooled and stored without being taken out of the transport container. 9. The transport / temporary storage method for a mixed oxide fuel assembly according to claim 6, wherein in the temporary storage step, the transport top lid is replaced with the temporary storage preliminary lid according to claim 4, and the inside of the transport container is replaced. A method for transporting and temporarily storing a mixed oxide fuel body, wherein the mixed oxide fuel body is cooled and stored without being taken out of the transport container. 10. The transport / temporary storage method for a mixed oxide fuel assembly according to claim 6, wherein in the temporary storage step, the transport top lid is replaced with a temporary storage preliminary lid according to claim 5,
A method for transporting and temporarily storing a mixed oxide fuel body, wherein the internal gas in the transport container is cooled and stored without being taken out of the transport container. 11. A long container body for storing a mixed oxide fuel body, and a transport top cover for covering one longitudinal side of the container body on which a top side of the mixed oxide fuel body is disposed during transportation. In the transport container for transporting and temporarily storing the mixed oxide fuel body, the container body or the top cover is provided with an internal gas inlet / outlet for taking out and taking in the internal gas of the container body, A container for transporting a mixed oxide fuel body, wherein the internal gas inlet / outlet can be connected to a circulating system cooling mechanism provided outside the container body. 12. A loading step of loading a mixed oxide fuel body into a transport container, a transfer step of transporting the transport container, and waiting before and after or during the transport while the fuel body is stored in the transport container. In the transport / temporary storage method for a fuel assembly, comprising a temporary storage process, the loading process includes loading the fuel assembly into a fuel transport container having the internal gas inlet / outlet port according to claim 11 in a container body or a top cover, In the temporary storage step, a separate circulating system cooling mechanism is connected to the internal gas inlet / outlet, whereby the internal gas is forcibly circulated to an external cooling mechanism and stored while being cooled. Transport and temporary storage of waste fuel. 13. A loading step of loading a mixed oxide fuel body into a transport container, a transfer step of transporting the transport container, and waiting before and after or during the transport while the fuel body is stored in the transport container. In the method for transporting / temporarily storing a fuel assembly, the method further comprising: a temporary storage step, wherein in the temporary storage step, existing holes such as a drain hole and a measurement hole provided for maintaining the original function of the transport container are externally provided. Wherein the internal gas of the transport container is forcibly circulated to an external cooling mechanism for cooling and storing the mixed gas while cooling and storing the mixed oxide fuel body. . 14. A long container main body for storing a mixed oxide fuel assembly, and a transport top cover for covering one longitudinal end of the container main body on which a top portion of the mixed oxide fuel assembly is disposed during transportation. In a transport container for transporting and temporarily storing the mixed oxide fuel body, a gas for storing a basket as a fuel body storage portion in the container body and flowing an internal gas through a bottom plate portion of the basket is provided. A transport container for a mixed oxide fuel body, wherein a transport hole is provided. 15. A loading step of loading a mixed oxide fuel body into a transport container, a transfer step of transporting the transport container, and waiting before and after or during the transport while the fuel body is stored in the transport container. 15. The mixed oxide fuel according to claim 14, wherein said fuel body is stored in a fuel transport container having a built-in basket in the loading step. How to transport and temporarily store your body. 16. The method according to claim 6, wherein
5. The method for transporting and temporarily storing a mixed oxide fuel assembly according to claim 5, wherein, in the loading step, the fuel assembly is stored in a top-open type fuel assembly protection container having a window and no top at the top. How to transport and temporarily store oxide fuel assemblies. 17. The method for transporting / temporarily storing a mixed oxide fuel body according to claim 6, 7, 12, 13, 15, or 16, wherein in the temporary storage step, an internal gas inlet / outlet for connecting a circulation system cooling mechanism. The transport container is inclined from the horizontal state or the vertical state so that the extraction hole side is the upper side and the intake hole side is the lower side, and the internal gas in the transport container is forcibly circulated to the external cooling mechanism for cooling. A method for transporting and temporarily storing a mixed oxide fuel body, wherein the mixed oxide fuel body is stored.