JP5132874B2 - Metal-coated heat insulation - Google Patents
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- JP5132874B2 JP5132874B2 JP2005222944A JP2005222944A JP5132874B2 JP 5132874 B2 JP5132874 B2 JP 5132874B2 JP 2005222944 A JP2005222944 A JP 2005222944A JP 2005222944 A JP2005222944 A JP 2005222944A JP 5132874 B2 JP5132874 B2 JP 5132874B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Description
本発明は、原子力発電プラントの原子炉やその機器等への配管設備を断熱するための金属被覆断熱保温材に関するものである。 The present invention relates to a metal-coated insulation lagging material for insulating the plumbing into the reactor and its equipment and the like of a nuclear power plant.
従来、原子力発電プラントにおいては、原子炉から延出する配管や、付設されている各種機器等への配管は金属被覆断熱保温材により被覆されている。例えば、特許文献１には、金属被覆材である金属製ケースの内部に多数の金属薄板が積層状に充填配置される金属反射型保温装置において、前記金属薄板に、格子状に型押しされたリブと、前記格子状リブで区画される面部分にあって、金属薄板間で異なる位相部位に前記リブより高く型押しされた突起とが設けられ、金属薄板は前記突起高さで規制される間隔をとって積層されていることを特徴とする金属反射型保温装置が開示されている。また、特許文献２には、断熱保温すべき配管や機器の外側に、軸方向および周方向に複数個に分割された保温体を配置し、かつ該保温体の周方向接合部の１つが配管の頂上部に位置するように配置し、前記接合部の周方向両側に変形防止用金属板を取り付けて成ることを特徴とする断熱保温装置が開示され、その［００１３］段落には、上記保温体は２分割された半円筒形を成し、金属薄板を層状に積層しケース状の金属板で覆ってなる金属被覆断熱保温材、ロックウール等の繊維質保温材や、シリカ、珪酸カルシウム等の成形保温材を金属ケースで被覆してなる金属被覆断熱保温材であることが開示されている。 Conventionally, in a nuclear power plant, piping extending from a nuclear reactor and piping to various devices attached thereto are covered with a metal-coated heat insulation material. For example, in Patent Document 1, in a metal reflection type heat retaining apparatus in which a large number of thin metal plates are filled and arranged inside a metal case which is a metal covering material, the metal thin plates are embossed in a lattice shape. A rib and a projection that is embossed higher than the rib are provided at a phase portion that is partitioned by the lattice-like rib and is different between the thin metal plates, and the thin metal plate is regulated by the height of the protrusion. There is disclosed a metal reflection type heat retaining device characterized by being laminated at intervals. Further, in Patent Document 2, a heat insulating body divided into a plurality of parts in the axial direction and the circumferential direction is arranged outside a pipe and equipment to be insulated and heat-insulated, and one of the circumferential joints of the heat insulating body is a pipe. of arranged so as to be positioned on the top portion, Heat insulation apparatus characterized by comprising attaching a circumferential direction on both sides for preventing deformation metal plate of the joint are disclosed in the [0013] paragraph of that, the The heat insulation body is divided into two semi-cylinders , and is a metal- coated heat insulation material made by laminating metal sheets in layers and covered with a case-like metal plate, fiber heat insulation materials such as rock wool, silica, calcium silicate It is disclosed that it is a metal-coated heat insulating heat insulating material formed by covering a molded heat insulating material such as a metal case with a metal case.
上述のような保温材のうち、金属薄板を積層してなる金属製保温材は、加工が難しく、また、費用も掛る。また、珪酸カルシウムからなる成形保温材は、珪酸カルシウムの加工が難しく、複雑な形状の配管設備に使用する金属被覆断熱保温材に精度良く適応させることが困難であった。 Among the above-mentioned heat insulating materials, a metal heat insulating material formed by laminating metal thin plates is difficult to process and costs high. Further, molded heat insulating material made of calcium silicate, the processing of calcium silicate is difficult, it is difficult to accurately adapted to the metal-coated Heat Insulation material used in the plumbing of complex shape.
そこで、従来、ロックウールを使用した保温材が多用されている。ところで、原子力発電プラントでは、配管破断による原子炉冷却材喪失事故［原子炉に繋がっている配管の破断等により原子炉内の冷却材（炉水）が流出する事象］時には、自動起動して原子炉に注水するための非常用炉心冷却系統ポンプを備えており、この非常用炉心冷却系統では、水源であるサプレッションプールに異物が存在し、該ポンプに吸い込まれてポンプに悪影響が生じるのを防ぐため、サプレッションプールの該ポンプへの吸い込み口にストレーナ（金網）を設置している。そのために、配管が破断すると、保温材に使用されているロックウールが破損して飛散し、サプレッションプール中の水に混入し、非常用炉心冷却系統のストレーナの目詰まりの原因となる。そして、非常用炉心冷却系統のストレーナが目詰まりを起こすと、該系統ポンプの吸水圧力が低下して該系統ポンプを停止させなければならない事態を生ずる。ここで、非常用炉心冷却系統のストレーナは、サプレッションプール中の水位の中程に設置されており、該系統ポンプを停止することにより非常用炉心冷却系統のストレーナに吸引されたロックウール等をサプレッションプールの底部に落下させ、それによって該系統ポンプを再稼働させることができるという構成になっている。 Therefore, conventionally, a heat insulating material using rock wool is frequently used. Where, in the nuclear power plant, reactor coolant loss accident by hose rupture [events coolant in the reactor by piping that is connected to the reactor breakage (reactor water) flows out] Sometimes, the autostart An emergency core cooling system pump for injecting water into the nuclear reactor is provided . In this emergency core cooling system, foreign matter is present in the suppression pool , which is a water source, and it is sucked into the pump to cause an adverse effect on the pump. In order to prevent this, a strainer (wire net) is installed at the suction port of the suppression pool to the pump. Therefore, when the pipe is broken, rock wool used in the heat insulating material is scattered damaged, mixed in water in the suppression pool, causing clogging of the strainer of the emergency core cooling system. When the strainer of the emergency core cooling system is clogged, the water absorption pressure of the system pump is lowered, and the system pump must be stopped. Here, the strainer of the emergency core cooling system is installed in the middle of the water level in the suppression pool, suppression rock wool or the like sucked into the strainer of the emergency core cooling system by stopping the system pump is dropped to the bottom of the pool, thereby has a structure that can be re-run the system pump.
従って、本発明の目的は、配管破断による冷却材喪失事故時における非常用炉心冷却系統ポンプの作動時に、配管破断に伴う保温材の破壊屑等が非常用炉心冷却系統のストレーナの目詰まりを起して該ポンプの吸い込み口を塞ぎ、非常用炉心冷却系統ポンプ停止の原因となることのない金属被覆断熱保温材を提供することにある。 Accordingly, the object of the present invention is to prevent the heat-insulating material debris associated with pipe breakage from clogging the strainer of the emergency core cooling system when the emergency core cooling system pump is operated in the event of loss of coolant due to pipe breakage. to close the suction port of the pump, is to provide an emergency core cooling system metals without the pump causes the stop covering insulation lagging material.
即ち、本発明は、水源であるサプレッションプールとこのサプレッションの水位の中程にストレーナを設置した吸い込み口を有する非常用炉心冷却系統を備えた原子力発電プラントの配管設備を断熱保温するための、保温材とこの保温材を装填する金属製ボックスとその開口部に取り付けた外装板からなる金属被覆材とにより構成される金属被覆断熱保温材において、前記保温材が、密度４〜１０ｋｇ／ｍ３で比重が水よりも軽いポリイミドフォームより構成され、前記金属被覆材に圧縮装填されていることを特徴とする金属被覆断熱保温材である。 That is, the present invention provides a heat insulation for heat insulation of a piping facility of a nuclear power plant including an emergency core cooling system having a suction pool with a strainer installed in the middle of the water level of the suppression pool as a water source. In the metal-coated heat insulating heat insulating material composed of the metal, the metal box for loading the heat insulating material, and the metal covering material composed of the exterior plate attached to the opening, the heat insulating material has a density of 4 to 10 kg / m 3 . A metal-coated heat insulating and heat-insulating material characterized in that it is made of a polyimide foam having a specific gravity lighter than water and is compression-loaded on the metal coating material.
本発明によれば、保温材として使用するポリイミドフォームが密度４〜１０ｋｇ／ｍ３で比重が水よりも軽いため、配管破断による冷却材喪失事故時における非常用炉心冷却系統ポンプの作動時に、配管破断に伴い発生する保温材の破壊屑等がサプレッションプールの水に混入することなく、水面を浮遊し、それによって、サプレッションプールの水位の中程に設置された非常用炉心冷却系統ポンプのストレーナが目詰まりを起し、非常用炉心冷却系統ポンプを停止させる原因となることがないという効果を奏するものである。また、ポリイミドフォームは金属被覆材に圧縮装填されているので、熱によって収縮し断熱保温性能を損なうことがなく、原子力発電プラントの配管設備の金属被覆断熱保温材として好適に使用することができる。 According to the present invention, since the polyimide foam used as the heat insulating material has a density of 4 to 10 kg / m 3 and the specific gravity is lighter than water, the piping at the time of operation of the emergency core cooling system pump at the time of coolant loss accident due to piping breakage The heat-insulating material debris generated by the breakage does not enter the water in the suppression pool and floats on the water surface, so that the strainer of the emergency core cooling system pump installed in the middle of the water level of the suppression pool There is an effect that it does not cause clogging and stop the emergency core cooling system pump. In addition, since the polyimide foam is compressed and loaded on the metal coating material, it does not shrink due to heat and does not impair the heat insulation performance, and can be suitably used as a metal coating heat insulation material for piping equipment of a nuclear power plant.
本発明は、水源であるサプレッションプールとこのサプレッションプールの水位の中程にストレーナを設置した吸い込み口を有する非常用炉心冷却系統ポンプとを備えた原子力発電プラントの配管設備を断熱保温するための、保温材とこの保温材を装填する金属製ボックスとその開口部に取り付けた外装板からなる金属被覆材とにより構成される金属被覆断熱保温材において、保温材として、特に、密度４〜１０ｋｇ／ｍ ３ で比重が水よりも軽いポリイミドフォームを使用するものである。 The present invention is to insulate and heat the piping equipment of a nuclear power plant including a suppression pool as a water source and an emergency core cooling system pump having a suction port with a strainer installed in the middle of the water level of the suppression pool. in the thermal insulation material Toko more composed metallized insulation lagging material in a metal box to loaded with a metal coating material made of the installed outer casing in the opening of the heat insulating material, as a heat insulating material, in particular, density 4～10Kg / specific gravity m 3 is intended to use the lighter polyimide foam than water.
ここで、ポリイミドフォームは、主成分がポリイミド樹脂から構成され、密度４〜１０ｋｇ／ｍ３、最高連続使用温度３００℃、熱伝導率０．０４６Ｗ／ｍＫを有するものである。 Here, the main component of the polyimide foam is a polyimide resin, and has a density of 4 to 10 kg / m 3 , a maximum continuous use temperature of 300 ° C., and a thermal conductivity of 0.046 W / mK.
原子力発電プラントの配管設備に金属被覆断熱保温材を施工するに際し、ポリイミドフォームは、予めブロック形状の成形体を作製し、この成形体から配管設備に応じて所定の寸法、形状に切断加工し、保温材として現場に搬入する。なお、ポリイミドフォームを切断加工するに際しては、配管設備からの熱による収縮を考慮して所定寸法よりも若干大きくするものである。 When constructing a metal-insulated heat insulation material in piping equipment of a nuclear power plant, polyimide foam is produced in advance in a block-shaped molded body and cut into a predetermined size and shape according to the piping equipment from this molded body. Carry it on site as a heat insulator. When the polyimide foam is cut, it is made slightly larger than the predetermined dimension in consideration of heat shrinkage from the piping equipment .
なお、金属被覆材は、その形状、構成等が特に限定されるものではなく、現在保温材としてロックウールを使用している金属被覆断熱保温材における金属被覆材である金属ケースと同様に構成し、また、その材料として同様のものを使用することができ、例えば、ステンレス鋼板、アルミニウム板等から構成することができる。 In addition, the shape and configuration of the metal covering material are not particularly limited. The metal covering material is configured in the same manner as the metal case that is the metal covering material in the metal-coated heat insulating heat insulating material that currently uses rock wool as the heat insulating material. Moreover, the same thing can be used as the material, for example, it can comprise from a stainless steel plate, an aluminum plate, etc.
ステンレス鋼板を用いて、内寸１００ｍｍ×５００ｍｍ×５００ｍｍのボックスを作製した。次に、ポリイミドフォーム（密度６ｋｇ／ｍ３）を１０５ｍｍ×５３０ｍｍ×５３０ｍｍの寸法、形状に切り出し、得られたポリイミドフォームをボックスの内部へ、ボックスの開口部から圧縮装填した。次に、ボックスの開口部へステンレス鋼板製の外装板をリベットにより取り付けることにより金属被覆断熱保温材を得た。この金属被覆断熱保温材は、原子力発電プラントの配管設備を断熱保温するための金属被覆断熱保温材として好適に使用することができる。 Using a stainless steel plate, a box with an inner size of 100 mm × 500 mm × 500 mm was produced. Next, a polyimide foam (density 6 kg / m 3 ) was cut into a size and shape of 105 mm × 530 mm × 530 mm, and the obtained polyimide foam was compressed and loaded into the inside of the box from the opening of the box. Next, a metal-coated heat insulating heat insulating material was obtained by attaching a stainless steel outer plate to the opening of the box with rivets. This metal-coated heat insulating heat insulating material can be suitably used as a metal-coated heat insulating heat insulating material for heat insulating and heat-insulating piping facilities of a nuclear power plant.
上記実施例で使用した金属被覆断熱保温材中のポリイミドフォームを粉砕し、得られた粉砕物を水に投入すると、水面を浮遊した。従って、ポリイミドフォームの粉砕物がサプレッションプールの水位の中程に設置された非常用炉心冷却系統のストレーナの目詰まりの原因となる恐れのないことが確認できた。 When the polyimide foam in the metal-coated heat insulation material used in the above examples was pulverized and the obtained pulverized product was put into water, the water surface floated. Therefore, it was confirmed that pulverized polyimide foam no risk causing clogging of the strainer of the emergency core cooling system installed in the middle of the water level of the suppression pool.
なお、上記実施例においては、単に、ステンレス鋼板製のボックスにポリイミドフォームを装填し、その開口部に外装板を取り付けた金属被覆断熱保温材を示したが、本発明の金属被覆断熱保温材はこれを基本的形態として、配管設備すなわち直管、エルボ、ティ・バルブ等の形状、口径、曲げ角等に応じ、保温材の厚さや寸法、周囲の状況等を勘案して変形し、また、金属被覆断熱保温材を分割型とし、その分割数、形状等に応じて適宜変形することとし、それらを組み合わせて配管設備の金属被覆断熱保温材とすることもできることは勿論である。 In the above embodiment, the metal-coated heat insulating heat insulating material was shown by simply loading a polyimide foam into a stainless steel steel box and attaching an exterior plate to the opening. this as a basic form, plumbing i.e. a straight pipe, an elbow, a shape such as a tee valve, diameter, depending on the bending angle and the like, the thickness and size of the heat insulating material, is deformed in consideration of the surrounding conditions, etc., and, metallized insulation lagging material and split, its number of divisions, and be appropriately modified according to the shape or the like, it is also possible of course that the metal coating Heat insulation material plumbing in combination.
本発明の金属被覆断熱保温材は、原子力発電プラントの配管設備を断熱保温するための金属被覆断熱保温材として好適に使用することができるばかりでなく、非常用炉心冷却系統ポンプの作動時に、配管破断に伴い発生する保温材の破壊屑等がサプレッションプールの水面を浮遊して水に混入することがなく、非常用炉心冷却系統のストレーナに目詰まりを生じさせないので、非常用炉心冷却系統ポンプを停止させる原因となることがない。 The metal-coated heat insulation material of the present invention can be suitably used as a metal-coating heat insulation material for heat insulation of the piping equipment of a nuclear power plant, as well as piping during operation of an emergency core cooling system pump. The debris, etc. of the heat insulating material generated due to breakage does not float on the water surface of the suppression pool and enter the water, and it does not clog the strainer of the emergency core cooling system. There is no cause to stop .
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| JP2012188584A Division JP5450737B2 (en) | 2012-08-29 | 2012-08-29 | Thermal insulation and heat insulation method for piping equipment in nuclear power plants |
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| JPS5899598A (en) * | 1981-12-03 | 1983-06-13 | 株式会社 大阪パツキング製造所 | Metal coated heat insulating material |
| JPS6057094A (en) * | 1983-09-09 | 1985-04-02 | 株式会社日立製作所 | Metal coating heat-insulating structure |
| JPS61117993U (en) * | 1985-01-10 | 1986-07-25 | ||
| JPH01269527A (en) * | 1988-04-20 | 1989-10-27 | Nichias Corp | Preparation of high-strength composite insulating material |
| US5096932A (en) * | 1990-01-16 | 1992-03-17 | Ethyl Corporation | Polyimide foam products and methods |
| JPH07174880A (en) * | 1993-12-20 | 1995-07-14 | Toshiba Corp | Reactor container and its reactor plant |
| JPH07248392A (en) * | 1994-03-09 | 1995-09-26 | Toshiba Corp | Nuclear reactor container |
| JP2002243092A (en) * | 2001-02-19 | 2002-08-28 | Sekisui Chem Co Ltd | Cylindrical foaming body |
| JP2002310387A (en) * | 2001-04-18 | 2002-10-23 | Sekisui Chem Co Ltd | Heat insulation tube |
| JP2004143378A (en) * | 2002-10-28 | 2004-05-20 | Ube Ind Ltd | Foamed polyimide structure and method for producing the same |
| JP2004218707A (en) * | 2003-01-14 | 2004-08-05 | Toshiba Corp | Heat insulating structure and its construction method |
| JP4428034B2 (en) * | 2003-11-28 | 2010-03-10 | 宇部興産株式会社 | Foamed polyimide structure and manufacturing method thereof |
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