JPWO2020172529A5

JPWO2020172529A5 -

Info

Publication number: JPWO2020172529A5
Application number: JP2021549526A
Authority: JP
Publication date: 2023-03-02
Anticipated expiration: 2040-02-21

Description

本開示に説明される主題の１つ以上の実装の詳細が、付随の図面および以下の説明に記載される。本主題の他の特徴、側面、および利点が、説明、図面、および請求項から明白となるであろう。
本発明は、例えば、以下を提供する。
（項目１）
核廃棄物キャニスタであって、前記核廃棄物キャニスタは、
少なくとも部分的に複数の核廃棄物部分を封入するようにサイズを決定された内容積を画定する筐体であって、前記筐体は、前記核廃棄物部分を地下層内に形成された方向性掘削孔の有害廃棄物処分場内に貯蔵するように構成されている、筐体と、
前記筐体の内容積内に封入された固体または半固体粒状物質と
を備え、
前記固体または半固体粒状物質は、前記内容積内および前記複数の核廃棄物部分間の空隙を少なくとも実質的に充填している、核廃棄物キャニスタ。
（項目２）
前記核廃棄物部分は、使用済み核燃料（ＳＮＦ）アセンブリの複数のＳＮＦロッドを備えている、項目１に記載の核廃棄物キャニスタ。
（項目３）
前記内容積は、単一ＳＮＦアセンブリを貯蔵するようにサイズを決定されている、項目２に記載の核廃棄物キャニスタ。
（項目４）
前記固体または半固体粒状物質は、固体粉末を備えている、項目１に記載の核廃棄物キャニスタ。
（項目５）
前記固体粉末は、二酸化ケイ素を備えている、項目４に記載の核廃棄物キャニスタ。
（項目６）
前記固体または半固体粒状物質は、中性子吸収材を備えている、項目１に記載の核廃棄物キャニスタ。
（項目７）
前記内容積内または前記筐体の外部表面上に位置付けられた衝撃吸収材をさらに備えている、項目１に記載の核廃棄物キャニスタ。
（項目８）
前記衝撃吸収材は、圧し潰し可能部材またはばね部材を備えている、項目７に記載の核廃棄物キャニスタ。
（項目９）
前記衝撃吸収材は、低腐食性物質を備えている、項目７に記載の核廃棄物キャニスタ。
（項目１０）
前記筐体の端部に搭載された摩擦ブレーキをさらに備えている、項目１に記載の核廃棄物キャニスタ。
（項目１１）
前記摩擦ブレーキは、旋回可能または回転可能接続を用いて前記筐体に搭載されている、項目１０に記載の核廃棄物キャニスタ。
（項目１２）
前記筐体の前記端部は、前記筐体の坑内端を備えている、項目１０に記載の核廃棄物キャニスタ。
（項目１３）
前記摩擦ブレーキは、前記方向性掘削孔内に据え付けられたケーシングに接触するように構成された表面を備えている、項目１０に記載の核廃棄物キャニスタ。
（項目１４）
核廃棄物を貯蔵する方法であって、前記方法は、
複数の核廃棄物部分を核廃棄物キャニスタの筐体の内容積の中に設置することであって、前記筐体は、前記核廃棄物部分を地下層内に形成された方向性掘削孔の有害廃棄物処分場内に貯蔵するように構成されている、ことと、
前記内容積内および前記複数の核廃棄物部分間の空隙を固体または半固体粒状物質で実質的に充填することと、
前記核廃棄物キャニスタの前記内容積をシールし、前記複数の核廃棄物部分および前記固体または半固体粒状物質を封入することと
を含む、方法。
（項目１５）
前記核廃棄物部分は、使用済み核燃料（ＳＮＦ）アセンブリの複数のＳＮＦロッドを備えている、項目１４に記載の方法。
（項目１６）
前記内容積は、単一ＳＮＦアセンブリを貯蔵するようにサイズを決定されている、項目１５に記載の方法。
（項目１７）
前記固体または半固体粒状物質は、固体粉末を備えている、項目１４に記載の方法。
（項目１８）
前記固体粉末は、二酸化ケイ素を備えている、項目１７に記載の方法。
（項目１９）
前記固体または半固体粒状物質は、中性子吸収材を備えている、項目１４に記載の方法。
（項目２０）
前記核廃棄物キャニスタは、前記内容積内または前記筐体の外部表面上に位置付けられた衝撃吸収材をさらに備えている、項目１４に記載の方法。
（項目２１）
前記衝撃吸収材は、圧し潰し可能部材またはばね部材を備えている、項目２０に記載の方法。
（項目２２）
前記衝撃吸収材は、低腐食性物質を備えている、項目２０に記載の方法。
（項目２３）
前記核廃棄物キャニスタは、前記筐体の端部に搭載された摩擦ブレーキをさらに備えている、項目１４に記載の方法。
（項目２４）
前記摩擦ブレーキは、旋回可能または回転可能接続を用いて前記筐体に搭載されている、項目２３に記載の方法。
（項目２５）
前記筐体の前記端部は、前記筐体の坑内端を備えている、項目２３に記載の方法。
（項目２６）
前記摩擦ブレーキは、前記方向性掘削孔内に据え付けられたケーシングに接触するように構成された表面を備えている、項目２３に記載の方法。
（項目２７）
前記シールされた核廃棄物キャニスタを前記方向性掘削孔の有害廃棄物処分場の中に移動させることをさらに含む、項目１４に記載の方法。
（項目２８）
前記方向性掘削孔を通した前記シールされた核廃棄物キャニスタの移動中の自由落下事象中、前記シールされた核廃棄物キャニスタの衝撃を軽減することをさらに含む、項目２７に記載の方法。 Details of one or more implementations of the subject matter described in this disclosure are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages of the present subject matter will become apparent from the description, drawings, and claims.
The present invention provides, for example, the following.
(Item 1)
A nuclear waste canister, said nuclear waste canister comprising:
An enclosure defining an interior volume sized to at least partially enclose a plurality of nuclear waste portions, said enclosure oriented with said nuclear waste portions formed within a subterranean formation. a housing configured for storage within a hazardous waste repository of a chemical wellbore;
a solid or semi-solid particulate material enclosed within the interior volume of said enclosure;
with
A nuclear waste canister, wherein the solid or semi-solid particulate matter at least substantially fills voids within the interior volume and between the plurality of nuclear waste portions.
(Item 2)
The nuclear waste canister of item 1, wherein the nuclear waste portion comprises a plurality of SNF rods of spent nuclear fuel (SNF) assemblies.
(Item 3)
3. The nuclear waste canister of item 2, wherein the internal volume is sized to store a single SNF assembly.
(Item 4)
2. The nuclear waste canister of item 1, wherein the solid or semi-solid particulate matter comprises solid powder.
(Item 5)
5. The nuclear waste canister of item 4, wherein the solid powder comprises silicon dioxide.
(Item 6)
A nuclear waste canister according to item 1, wherein the solid or semi-solid particulate matter comprises neutron absorbing material.
(Item 7)
The nuclear waste canister of item 1, further comprising a shock absorber positioned within the interior volume or on an exterior surface of the housing.
(Item 8)
Nuclear waste canister according to item 7, wherein the shock absorbing material comprises a collapsible member or a spring member.
(Item 9)
8. Nuclear waste canister according to item 7, wherein the shock absorbing material comprises a low corrosive material.
(Item 10)
A nuclear waste canister according to item 1, further comprising a friction brake mounted on an end of said housing.
(Item 11)
11. Nuclear waste canister according to item 10, wherein the friction brake is mounted to the housing using a pivotable or rotatable connection.
(Item 12)
11. Nuclear waste canister according to item 10, wherein the end of the enclosure comprises a downhole end of the enclosure.
(Item 13)
11. The nuclear waste canister of item 10, wherein the friction brake comprises a surface configured to contact a casing installed within the directional borehole.
(Item 14)
A method of storing nuclear waste, said method comprising:
placing a plurality of nuclear waste portions within an internal volume of a nuclear waste canister enclosure, said enclosure enclosing said nuclear waste portions in a directional borehole formed in a subterranean formation; configured for storage within a hazardous waste repository;
substantially filling voids within said internal volume and between said plurality of nuclear waste portions with solid or semi-solid particulate matter;
sealing the interior volume of the nuclear waste canister to enclose the plurality of nuclear waste portions and the solid or semi-solid particulate matter;
A method, including
(Item 15)
15. The method of item 14, wherein the nuclear waste portion comprises a plurality of SNF rods of spent nuclear fuel (SNF) assemblies.
(Item 16)
16. The method of item 15, wherein the internal volume is sized to store a single SNF assembly.
(Item 17)
15. The method of item 14, wherein the solid or semi-solid particulate material comprises a solid powder.
(Item 18)
18. The method of item 17, wherein the solid powder comprises silicon dioxide.
(Item 19)
15. The method of item 14, wherein the solid or semi-solid particulate matter comprises a neutron absorbing material.
(Item 20)
15. The method of item 14, wherein the nuclear waste canister further comprises a shock absorber positioned within the interior volume or on an exterior surface of the housing.
(Item 21)
21. Method according to item 20, wherein the shock absorbing material comprises a crushable member or a spring member.
(Item 22)
21. The method of item 20, wherein the shock absorber comprises a low corrosive material.
(Item 23)
15. The method of item 14, wherein the nuclear waste canister further comprises a friction brake mounted on the end of the housing.
(Item 24)
24. Method according to item 23, wherein the friction brake is mounted to the housing using a pivotable or rotatable connection.
(Item 25)
24. The method of item 23, wherein the end of the housing comprises a downhole end of the housing.
(Item 26)
24. The method of item 23, wherein the friction brake comprises a surface configured to contact a casing installed within the directional borehole.
(Item 27)
15. The method of item 14, further comprising moving the sealed nuclear waste canister into a hazardous waste repository of the directional borehole.
(Item 28)
28. The method of item 27, further comprising cushioning the sealed nuclear waste canister during a free fall event during movement of the sealed nuclear waste canister through the directional borehole.

Claims

A hazardous waste material storage system comprising:
A borehole extending into the earth, said borehole comprising an entrance at least proximate to the surface, a vertical portion, a curved portion, and a horizontal portion, said horizontal portion comprising said horizontal portion of said borehole. a borehole comprising a hazardous waste dump formed within a first portion of
a safety ramp formed within a second portion of said horizontal portion adjacent said curved portion excluding said hazardous waste dump site, said safety ramp defined by a particular length; a sexual slope;
at least one hazardous waste canister positionable within said hazardous waste site, said hazardous waste canister extending from said inlet to said vertical portion, said curved portion, and said horizontal portion of said borehole; sized to fit within said hazardous waste disposal site through first and second portions, said hazardous waste canister comprising an internal cavity sized to enclose hazardous waste material; at least one hazardous waste canister and
Hazardous waste storage system, comprising:

2. The hazardous waste storage system of claim 1, wherein the hazardous waste material comprises nuclear waste.

3. The hazardous waste storage system of Claim 2, wherein the nuclear waste comprises at least one of spent nuclear fuel or high-level radioactive waste.

The specified length is determined based at least in part on the travel distance of the hazardous waste canister or test canister from the vertical portion through the curved portion into the horizontal portion in a free fall event. A hazardous waste material storage system according to claim 1.

The distance traveled is at least partially dependent on the terminal velocity of the hazardous waste canister or test canister during the free fall event and the coefficient of friction between the hazardous waste canister or test canister and the borehole. 5. The hazardous waste material storage system of claim 4, based on.

2. The hazardous waste storage system of claim 1, wherein said borehole further comprises an angled portion coupled between said curved portion and said horizontal portion.

The specified length is based at least in part on the travel distance of the hazardous waste canister or test canister from the vertical portion through the curved and angled portion into the horizontal portion in a free fall event. , is determined.

The travel distance is determined by the terminal velocity of the hazardous waste canister or test canister during the free fall event, the coefficient of friction between the hazardous waste canister or test canister and the borehole, and the tilted 8. The hazardous waste storage system of claim 7, based at least in part on the tilt angle of the portion.

7. The hazardous waste storage system of Claim 6, wherein said angled portion is angled from said curved portion toward said surface.

2. The hazardous waste storage system of claim 1, wherein said at least one hazardous waste canister is located exclusively within said hazardous waste landfill and external to said safety ramp.

3. The hazardous waste storage system of claim 1, wherein the at least one hazardous waste canister comprises a plurality of hazardous waste canisters.

12. The hazardous waste storage system of claim 11, wherein each of said plurality of hazardous waste canisters is positioned exclusively within said hazardous waste landfill and external to said safety ramp.

2. The hazardous waste storage system of claim 1, further comprising a seal positioned within said borehole, said seal isolating said hazardous waste disposal site from said entrance of said borehole.

a method,
moving a hazardous waste canister through an entrance of a borehole extending into the earth's surface, said entrance being at least proximate to said earth's surface, said hazardous waste canister having an interior enclosing hazardous waste material; comprising a cavity;
moving the hazardous waste canister through a vertical portion of the borehole and through a curved portion of the borehole;
moving the hazardous waste canister from the curved portion through a first portion of the horizontal portion of the borehole comprising a safety ramp defined by a specified length;
moving the hazardous waste canister from the first portion of the horizontal portion of the borehole into a second portion of the horizontal portion of the borehole comprising a hazardous waste dump, said hazardous waste canister is sized to fit from said inlet through said first and second portions of said vertical portion, said curved portion, and said horizontal portion of said borehole;
A method, including

15. The method of Claim 14, wherein the hazardous waste material comprises nuclear waste.

16. The method of claim 15, wherein the nuclear waste comprises at least one of spent nuclear fuel or high-level radioactive waste.

The specified length is determined based at least in part on the travel distance of the hazardous waste canister or test canister from the vertical portion through the curved portion into the horizontal portion in a free fall event. 15. The method of claim 14.

The distance traveled is at least partially dependent on the terminal velocity of the hazardous waste canister or test canister during the free fall event and the coefficient of friction between the hazardous waste canister or test canister and the borehole. 18. The method of claim 17, wherein the method is based on

15. The method of claim 14, further comprising moving the hazardous waste canister from the curved portion into an angled portion of the borehole and from the angled portion into the horizontal portion. .

The travel distance is determined by the terminal velocity of the hazardous waste canister or test canister during the free fall event, the coefficient of friction between the hazardous waste canister or test canister and the borehole, and the tilted 21. The method of claim 20, based at least in part on the tilt angle of the portion.

20. The method of claim 19, wherein said angled portion is angled from said curved portion toward said surface.

15. The method of claim 14, further comprising positioning the at least one hazardous waste canister exclusively within the hazardous waste site and external to the safety ramp.

The at least one hazardous waste canister comprises a plurality of hazardous waste canisters, and the method includes placing each of the plurality of hazardous waste canisters exclusively within the hazardous waste site and relative to the safety ramp. 15. The method of claim 14, further comprising positioning externally with the

15. The method of claim 14, further comprising locating a seal within the borehole that isolates the hazardous waste disposal site from the entrance of the borehole.