JP4630878B2 - Radioactive waste storage equipment - Google Patents

Radioactive waste storage equipment Download PDF

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JP4630878B2
JP4630878B2 JP2007008324A JP2007008324A JP4630878B2 JP 4630878 B2 JP4630878 B2 JP 4630878B2 JP 2007008324 A JP2007008324 A JP 2007008324A JP 2007008324 A JP2007008324 A JP 2007008324A JP 4630878 B2 JP4630878 B2 JP 4630878B2
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wall
storage chamber
radioactive waste
partition wall
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JP2008122359A (en
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保彦 鈴木
嘉一 正木
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Toshiba Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Description

本発明は、放射性廃棄物を貯蔵する設備に関する。   The present invention relates to a facility for storing radioactive waste.

原子力プラントで発生する低レベル放射性廃棄物の貯蔵室は、地下に構築されたコンクリート製ピット内に形成されており、冷却通風路を形成するとともに放射線を遮へいする構造となっている。放射性廃棄物の冷却方式は給気ダクトと排気ダクトのヘッド差による自然冷却であり、貯蔵室側面に設置された給気ダクトから冷却空気を取り込み、給気ダクトと反対側の貯蔵室側面に設置された排気ダクトから昇温した空気が排出される。   A storage room for low-level radioactive waste generated in a nuclear power plant is formed in a concrete pit built underground, which forms a cooling ventilation path and shields radiation. The cooling method for radioactive waste is natural cooling due to the head difference between the air supply duct and the exhaust duct. Cooling air is taken in from the air supply duct installed on the side of the storage room and installed on the side of the storage room opposite to the air supply duct. The heated air is discharged from the exhaust duct.

収納管からの発熱を除去する従来の方式としては貯蔵される廃棄物の収納管の外周部に通気管を設置する２重管構造として、収納管と通気管の間に冷却空気を通過させて冷却する方法がとられており、それによって側壁コンクリートへの輻射熱が抑制されていたが、２重管構造が故に貯蔵室が大きくなる問題があった。   As a conventional method for removing heat generated from the storage tube, a double-pipe structure in which a ventilation pipe is installed on the outer periphery of the storage pipe for stored waste, and cooling air is passed between the storage pipe and the ventilation pipe. Although the method of cooling was taken and the radiant heat to side wall concrete was suppressed by it, there existed a problem that a storage chamber became large because of a double pipe structure.

そのため、収納管の外周部に設置した通気管を廃止し、単管構造として、貯蔵室の壁に鋼製遮蔽壁と排気ダクトに鋼製ダクトを設置することで、収納管からの輻射熱の抑制と収納管を除熱して高温になった空気が直接コンクリートに接触しないことでコンクリートの制限温度を超過しない方式がある（特許文献１参照）。   Therefore, the ventilation pipe installed on the outer periphery of the storage pipe is abolished, and the radiant heat from the storage pipe is suppressed by installing a steel shielding wall on the wall of the storage room and a steel duct on the exhaust duct as a single pipe structure. In addition, there is a method in which the temperature limit of concrete is not exceeded by the fact that the air heated to a high temperature after removing the storage tube does not directly contact the concrete (see Patent Document 1).

さらに、貯蔵室内の流量アンバランスによる各収納管の放熱ムラを低減するために、下部プレナム室を形成させて各収納管の下部から冷却空気が供給される様に下部プレナム板が設置されているものもある（特許文献２参照）。
特開２００１−２１６９１号公報 特開２００１−２７６９５号公報 Furthermore, in order to reduce the heat radiation unevenness of each storage pipe due to the flow rate imbalance in the storage chamber, a lower plenum plate is installed so that cooling air is supplied from the lower part of each storage pipe by forming a lower plenum chamber. There is also a thing (refer patent document 2).
JP 2001-21691 A JP 2001-27695 A

しかしながら、上述した放射性廃棄物の貯蔵設備においては、鋼製遮蔽壁および鋼製排気ダクトをコンクリート壁全面に設置することから、設備物量が多いため施工に大幅な時間が掛かるとともに、設備費が嵩むという問題があった。   However, in the radioactive waste storage facility described above, since the steel shielding wall and the steel exhaust duct are installed on the entire surface of the concrete wall, the amount of equipment is large, so the construction takes a lot of time and the equipment cost increases. There was a problem.

本発明は、上述した課題を解決するためになされたものであり、貯蔵室内の高温になる場所に効率的に鋼製遮蔽壁や断熱材を配置することにより、少ない設備物量でコンクリートの制限温度を超過させないようにすることを目的とする。   The present invention has been made in order to solve the above-mentioned problems, and by efficiently arranging a steel shielding wall and a heat insulating material at a high temperature place in a storage chamber, the temperature limit of concrete can be reduced with a small amount of equipment. The purpose is not to exceed.

本発明に係る放射性廃棄物の貯蔵設備は、上述した課題を解決するために、廃棄体を収納した複数の収納管が配列された複数の貯蔵室と、前記貯蔵室の各々に設けられ、前記貯蔵室に空気を取り込む給気ダクトと、前記貯蔵室の各々に設けられ、前記給気ダクトを通して前記貯蔵室に取り込まれた空気を放出する排気ダクトと、隣接する他の貯蔵室を仕切る外壁であると共に前記貯蔵室の一部を構成する間仕切り壁の内側に設けられ、この間仕切り壁との間で前記貯蔵室に取り込まれた空気が流れる鋼製遮蔽壁とを有し、前記鋼製遮蔽壁は、隣接する他の貯蔵室と相対する面にのみ設けられることを特徴とするものである。 In order to solve the above-described problem, the radioactive waste storage facility according to the present invention is provided in each of a plurality of storage chambers in which a plurality of storage tubes storing waste bodies are arranged , An air supply duct that takes air into the storage chamber, an exhaust duct that is provided in each of the storage chambers and discharges air taken into the storage chamber through the air supply duct, and an outer wall that partitions another adjacent storage chamber And a steel shielding wall provided inside the partition wall constituting a part of the storage chamber and through which the air taken into the storage chamber flows between the partition wall and the steel shielding wall Is provided only on a surface facing another adjacent storage chamber .

本発明に係る放射性廃棄物の貯蔵設備は、少ない設備物量でコンクリートの制限温度を超過させないようにすることができる。   The radioactive waste storage facility according to the present invention can prevent the temperature limit of concrete from being exceeded with a small amount of facilities.

（実施例１）
本発明の第１の実施形態の放射性廃棄物の貯蔵設備について、図１〜３を参照して説明する。 Example 1
The radioactive waste storage facility of the first embodiment of the present invention will be described with reference to FIGS.

図１は、本発明の第１の実施形態の放射性廃棄物の貯蔵設備の平面図であり、図2は、図１のＡ−Ａにおける断面図であり、図３は、図１のＢ−Ｂにおける断面図である。廃棄体１の貯蔵区域として複数の廃棄体１を収納する複数の収納管２が貯蔵室天井３に固定されて複数の貯蔵室４内に配列している。廃棄体１が収納された収納管２からの発熱を除去するために、大気中より給気ダクト５を通して貯蔵室４に取り込まれた冷却空気６を自然対流により収納管２の周囲に流通させた後、給気ダクト５と反対側に配置した排気ダクト７を通して放出させるようにしている。鋼製遮蔽壁９は貯蔵区域間の間仕切り壁８にのみ設けている。   FIG. 1 is a plan view of a radioactive waste storage facility according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. It is sectional drawing in B. A plurality of storage pipes 2 for storing a plurality of waste bodies 1 as storage areas for the waste bodies 1 are fixed to the storage room ceiling 3 and arranged in the plurality of storage rooms 4. In order to remove heat generated from the storage tube 2 in which the waste body 1 is stored, the cooling air 6 taken into the storage chamber 4 from the atmosphere through the air supply duct 5 was circulated around the storage tube 2 by natural convection. Then, it discharges | emits through the exhaust duct 7 arrange | positioned on the opposite side to the air supply duct 5. FIG. The steel shielding wall 9 is provided only on the partition wall 8 between the storage areas.

本発明の第1の実施形態によれば、高温となる貯蔵区域間の間仕切り壁８には鋼製遮蔽壁９があるため、貯蔵区域間の間仕切り壁８が廃棄体１からの輻射熱によって温度上昇することを抑制できる。また、鋼製遮蔽壁９により間仕切り壁８との間には冷却空気が流れるため、収納管２の周囲を通過した冷却空気と直接交わらないため、間仕切り壁８のコンクリート温度を低く保つことができる。また、鋼製遮蔽壁９を貯蔵区域間の間仕切り壁以外の貯蔵区域のコンクリート壁１１は、貯蔵区域間の間仕切り壁８と異なり、輻射熱を受ける面と反対側に放熱されることにより、コンクリート制限温度に至らないことから、鋼製遮蔽壁を設けないので、設備物量が低減され、設備の簡素化と設備費の低減を図ることができる。   According to the first embodiment of the present invention, the partition wall 8 between the storage areas that is at high temperature has the steel shielding wall 9, so that the partition wall 8 between the storage areas rises in temperature due to radiant heat from the waste body 1. Can be suppressed. Further, since the cooling air flows between the partition wall 8 and the steel shielding wall 9, it does not directly intersect with the cooling air that has passed around the storage pipe 2, so that the concrete temperature of the partition wall 8 can be kept low. . Further, the concrete wall 11 of the storage area other than the partition wall between the storage areas of the steel shielding wall 9 is different from the partition wall 8 between the storage areas, and is radiated to the opposite side to the surface receiving the radiant heat, thereby restricting the concrete. Since the temperature is not reached, the steel shielding wall is not provided, so that the amount of equipment can be reduced, and the equipment can be simplified and the equipment cost can be reduced.

なお、貯蔵区域間の間仕切り壁以外の貯蔵区域のコンクリート壁１１および排気ダクト７のコンクリート部分は、解析によりコンクリートの制限温度以下であることが確認されているため、鋼製遮蔽壁９を設けていない。   Note that the concrete wall 11 of the storage area other than the partition walls between the storage areas and the concrete portion of the exhaust duct 7 are confirmed to be below the limit temperature of the concrete by analysis, and therefore the steel shielding wall 9 is provided. Absent.

（実施例２）
本発明の第２の実施形態の放射性廃棄物の貯蔵設備について、図４〜６を参照して説明する。 (Example 2)
A radioactive waste storage facility according to a second embodiment of the present invention will be described with reference to FIGS.

図４は、本発明の第２の実施形態の放射性廃棄物の貯蔵設備の平面図であり、図５は、図４のＡ−Ａにおける断面図であり、図６は、図４のＢ−Ｂにおける断面図である。第１の実施形態と同一の構成には同一の符号を付し、重複する説明は省略する。図１と同様な構成において、コンクリートの制限温度である65度以上となる貯蔵区域の間仕切り壁８、６５度以上となる貯蔵区域で貯蔵区域間の間仕切り壁以外の貯蔵区域のコンクリート壁１１および貯蔵室天井３をより低い温度に保つために、鋼製遮蔽壁９、間仕切り壁以外の貯蔵区域のコンクリート壁１１および貯蔵室天井３に断熱材１２を設ける。間仕切り壁８に関しては、上述のとおり、廃棄体１からの輻射熱による温度上昇を抑制するために鋼製遮蔽壁９を設けており、間仕切り壁８をより低い温度に保つための断熱材を設ける位置は、間仕切り壁８ではなく、遮蔽壁９が適切である。 FIG. 4 is a plan view of a radioactive waste storage facility according to the second embodiment of the present invention, FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4, and FIG. It is sectional drawing in B. The same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. In the same configuration as in FIG. 1, the partition wall 8 of the storage area where the temperature limit of the concrete is 65 degrees or higher, the concrete wall 11 of the storage area other than the partition wall between the storage areas in the storage area where the temperature is 65 degrees or higher and the storage In order to keep the room ceiling 3 at a lower temperature, a heat insulating material 12 is provided on the steel shielding wall 9, the concrete wall 11 in the storage area other than the partition wall, and the storage room ceiling 3 . With respect to the partition wall 8, as described above, the steel shielding wall 9 is provided in order to suppress the temperature rise due to the radiant heat from the waste body 1, and the heat insulating material for keeping the partition wall 8 at a lower temperature is provided. In this case, the shielding wall 9 is appropriate instead of the partition wall 8.

本実施の形態によれば、貯蔵区域でも６５度以上となる間仕切り壁８、貯蔵区域間の間仕切り壁８以外の貯蔵区域のコンクリート壁１１および貯蔵室天井３をより低い温度に保つために、鋼製遮蔽壁９、間仕切り壁以外の貯蔵区域のコンクリート壁１１および貯蔵室天井３に断熱材１２を設けることにより、６５度以上となる領域のみを効果的に低い温度に保つことができる。また、断熱材１２を６５度以上となる領域以外には設けないので、設備物量が低減され、設備の簡素化と設備費の低減を図ることができる。 According to this embodiment, in order to keep the partition wall 8 which is 65 degrees or more in the storage area, the concrete wall 11 of the storage area other than the partition wall 8 between the storage areas and the ceiling 3 of the storage room at a lower temperature, By providing the heat insulating material 12 on the concrete wall 11 and the storage room ceiling 3 in the storage area other than the shielding wall 9 and the partition wall, only the region of 65 degrees or more can be effectively kept at a low temperature. Moreover, since the heat insulating material 12 is not provided other than the area | region which becomes 65 degree | times or more, the amount of equipment can be reduced and the simplification of equipment and reduction of equipment cost can be aimed at.

（実施例３）
本発明の第３の実施形態の放射性廃棄物の貯蔵設備について説明する。 (Example 3)
A radioactive waste storage facility according to a third embodiment of the present invention will be described.

本発明の第３の実施形態の放射性廃棄物の貯蔵設備は、第２の実施形態の放射性廃棄物の貯蔵施設の貯蔵区域の鋼製遮蔽壁９および貯蔵区域で貯蔵区域間の間仕切り壁以外の貯蔵区域のコンクリート壁１１において、貯蔵区域の上部３分の１の部分と貯蔵室天井３に断熱材１２を設ける。 The radioactive waste storage facility according to the third embodiment of the present invention includes a steel shielding wall 9 in the storage area of the radioactive waste storage facility according to the second embodiment and a partition wall other than a partition wall between the storage areas in the storage area. In the concrete wall 11 of the storage area, a heat insulating material 12 is provided on the upper third part of the storage area and the ceiling 3 of the storage room.

コンクリートの制限温度である65度以上となる部分は、貯蔵区域の上部３分の１の部分の間仕切り壁８、貯蔵区域間の間仕切り壁８以外の貯蔵区域のコンクリート壁１１および排気ダクト７のコンクリート部分以外にはないことが解析により確認されている。   The concrete temperature limit of 65 ° C. is the partition wall 8 of the upper third part of the storage area, the concrete wall 11 of the storage area other than the partition wall 8 between the storage areas, and the concrete of the exhaust duct 7. It is confirmed by analysis that there is nothing other than the part.

本実施の形態によれば、貯蔵区域の鋼製遮蔽壁９および貯蔵区域で貯蔵区域間の間仕切り壁以外の貯蔵区域のコンクリート壁１１において、貯蔵区域の上部３分の１の部分と貯蔵室天井３に断熱材１２を設けることにより、６５度以上となる領域を効果的に低い温度に保つことができる。また、断熱材１２を６５度以上とならない領域には設けないので、設備物量が低減され、設備の簡素化と設備費の低減を図ることができる。 According to the present embodiment, in the steel shielding wall 9 of the storage area and the concrete wall 11 of the storage area other than the partition wall between the storage areas in the storage area, the upper third portion of the storage area and the ceiling of the storage room By providing the heat insulating material 12 in 3, the region of 65 degrees or more can be effectively kept at a low temperature. Moreover, since the heat insulating material 12 is not provided in the area | region which does not become 65 degree | times or more, the amount of equipment can be reduced and the simplification of equipment and reduction of equipment cost can be aimed at.

尚、本発明は上記の実施の形態にのみ限定されるものではなく、流路となる給気ダクトまたは排気ダクト等の途中に下部プレナム板等の整流装置および別途設ける遮蔽装置等の設置を妨げるものではない。   Note that the present invention is not limited to the above-described embodiment, and hinders the installation of a rectifier such as a lower plenum plate and a separately provided shielding device in the middle of an air supply duct or an exhaust duct serving as a flow path. It is not a thing.

本発明に係る放射性廃棄物の貯蔵設備の第１実施形態を示す平面図。The top view which shows 1st Embodiment of the storage facility of the radioactive waste which concerns on this invention. 本発明に係る放射性廃棄物の貯蔵設備の第１実施形態を示すＡ−Ａ断面図。The AA sectional view showing a 1st embodiment of the storage facility of radioactive waste concerning the present invention. 本発明に係る放射性廃棄物の貯蔵設備の第１実施形態を示すＢ−Ｂ断面図。BB sectional drawing which shows 1st Embodiment of the storage facility of the radioactive waste which concerns on this invention. 本発明に係る放射性廃棄物の貯蔵設備の第２実施形態を示す平面図。The top view which shows 2nd Embodiment of the storage facility of the radioactive waste which concerns on this invention. 本発明に係る放射性廃棄物の貯蔵設備の第２実施形態を示すＡ−Ａ断面図。AA sectional drawing which shows 2nd Embodiment of the storage facility of the radioactive waste which concerns on this invention. 本発明に係る放射性廃棄物の貯蔵設備の第２実施形態を示すＢ−Ｂ断面図。BB sectional drawing which shows 2nd Embodiment of the storage facility of the radioactive waste which concerns on this invention.

符号の説明Explanation of symbols

１ 廃棄体
２ 廃棄体収納管
３ 貯蔵室天井
４ 貯蔵室
５ 給気ダクト
７ 排気ダクト
８ 貯蔵区域間の間仕切り壁
９ 鋼製遮蔽壁
１１ 貯蔵区域間の間仕切り壁以外のコンクリート壁
１２ 断熱材 DESCRIPTION OF SYMBOLS 1 Waste body 2 Waste body storage pipe 3 Storage room ceiling 4 Storage room 5 Air supply duct 7 Exhaust duct 8 Partition wall between storage areas 9 Steel shielding wall 11 Concrete wall other than the partition wall between storage areas 12 Thermal insulation

Claims (2)

廃棄体を収納した複数の収納管が配列された複数の貯蔵室と、
前記貯蔵室の各々に設けられ、前記貯蔵室に空気を取り込む給気ダクトと、
前記貯蔵室の各々に設けられ、前記給気ダクトを通して前記貯蔵室に取り込まれた空気を放出する排気ダクトと、
隣接する他の貯蔵室を仕切る外壁であると共に前記貯蔵室の一部を構成する間仕切り壁の内側に設けられ、この間仕切り壁との間で前記貯蔵室に取り込まれた空気が流れる鋼製遮蔽壁とを有し、
前記鋼製遮蔽壁は、隣接する他の貯蔵室と相対する面にのみ設けられることを特徴とする放射性廃棄物の貯蔵設備。 A plurality of storage chambers in which a plurality of storage tubes storing waste bodies are arranged;
An air supply duct that is provided in each of the storage chambers and takes air into the storage chamber;
An exhaust duct that is provided in each of the storage chambers and discharges air taken into the storage chamber through the air supply duct;
A steel shielding wall that is an outer wall that partitions another adjacent storage chamber and that is provided inside a partition wall that constitutes a part of the storage chamber and through which air taken into the storage chamber flows between the partition wall And
2. The radioactive waste storage facility according to claim 1, wherein the steel shielding wall is provided only on a surface facing another adjacent storage chamber . 前記鋼製遮蔽壁の内側と、前記間仕切り壁以外の貯蔵室の外壁内側と、前記貯蔵室の天井に断熱材を備えることを特徴とする請求項１記載の放射性廃棄物の貯蔵設備。 The radioactive waste storage facility according to claim 1 , further comprising a heat insulating material on an inner side of the steel shielding wall, an inner side of an outer wall of the storage chamber other than the partition wall, and a ceiling of the storage chamber .
JP2007008324A 2006-10-18 2007-01-17 Radioactive waste storage equipment Active JP4630878B2 (en)

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JP2001033590A (en) * 1999-07-19 2001-02-09 Ishikawajima Harima Heavy Ind Co Ltd Heat-generating body storage facility
JP2004226217A (en) * 2003-01-22 2004-08-12 Toshiba Corp Radioactive material dry storage facility

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001033590A (en) * 1999-07-19 2001-02-09 Ishikawajima Harima Heavy Ind Co Ltd Heat-generating body storage facility
JP2004226217A (en) * 2003-01-22 2004-08-12 Toshiba Corp Radioactive material dry storage facility

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