JPH03194500A - Remelting method for sodium - Google Patents
Remelting method for sodiumInfo
- Publication number
- JPH03194500A JPH03194500A JP1333961A JP33396189A JPH03194500A JP H03194500 A JPH03194500 A JP H03194500A JP 1333961 A JP1333961 A JP 1333961A JP 33396189 A JP33396189 A JP 33396189A JP H03194500 A JPH03194500 A JP H03194500A
- Authority
- JP
- Japan
- Prior art keywords
- sodium
- heat insulating
- insulating material
- solidified
- piping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 61
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 61
- 239000011734 sodium Substances 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims description 8
- 239000011810 insulating material Substances 0.000 claims abstract description 23
- 238000007711 solidification Methods 0.000 claims description 12
- 230000008023 solidification Effects 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 10
- 229910052744 lithium Inorganic materials 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001010 compromised effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/30—Heating of pipes or pipe systems
- F16L53/35—Ohmic-resistance heating
- F16L53/38—Ohmic-resistance heating using elongate electric heating elements, e.g. wires or ribbons
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、固化した金属ナトリウムの再溶融法に係り、
更に詳しくは、高速増殖炉におけるナトリウム内包機器
、配管等に適用して好適なす１−リウムの再溶融法に関
するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for remelting solidified metallic sodium,
More specifically, the present invention relates to a method for remelting 1-lium that is suitable for application to sodium containing equipment, piping, etc. in fast breeder reactors.
［従来の技術］
高速増殖炉では冷却材として液体金属ナトリウムが使用
される。ナトリウムは融点が約９８℃である事から、高
速増殖炉におけるす１−リウム系機器・配管には系統へ
のナトリウム充填時に予め機器・配管温度をナトリウム
の融点以上に昇温保持するための予熱ヒータ付き保温設
備が設置されている。又、上記設備における予熱ヒータ
は、運転中に内部ナトリウム温度が低下した場合（例え
ば、系統中のある部分のすトリウ１１循環が停止すると
ナトリウムは滞留し、そこに熱源がないとすると保温材
を通して内部保有熱は外部に放散するので時間の経過と
共にナトリウム温度は低下する事になる）、ナトリウム
が融点以下の温度にならないように予熱温度（例えば約
２００℃）に維持する機能をも有する。[Prior Art] Liquid metallic sodium is used as a coolant in fast breeder reactors. Since the melting point of sodium is approximately 98°C, preheating is required for sodium-based equipment and piping in fast breeder reactors to raise and maintain the temperature of the equipment and piping above the melting point of sodium before filling the system with sodium. A heating facility with a heater is installed. Additionally, if the internal sodium temperature of the preheating heater in the above equipment drops during operation (for example, if the sodium 11 circulation in a certain part of the system stops, the sodium will remain, and if there is no heat source there, (Since the internal heat is dissipated to the outside, the sodium temperature will decrease over time), and it also has the function of maintaining the sodium at a preheating temperature (for example, about 200°C) so that the temperature does not drop below the melting point.
上記の通り、高速増殖炉のナトリウム系機器・配管は常
にその温度をナト・リウムの融点以上に保持するＩｉｕ
４ｉ＋＋対応を採っているが、万一、内部ナトリウム
が融点以下となり固化した場・合、固化す１−リウｌ、
を安全に再溶融させる事が必要不可欠である。As mentioned above, the sodium-based equipment and piping of a fast breeder reactor always maintains its temperature above the melting point of sodium and lithium.
4i++ compliance is adopted, but in the unlikely event that the internal sodium becomes below the melting point and solidifies, 1-LiuL,
It is essential to safely remelt the
このため、一般に高速増殖炉す１〜リウ１１系において
は、通常時意図的にナトリウムを固化させて固化ナトリ
ウムでシールする箇所（例えばフリーズシール部）や運
転中にナトリウムが固化する可能性の高い箇所について
は、つぎに示す如き、設備対応を採ってきた。以下、こ
れを第７図に基づいて説明する。For this reason, in fast breeder reactors S1 to RIO11 systems, there is a high possibility that sodium will solidify in places where sodium is intentionally solidified and sealed with solidified sodium under normal conditions (e.g., freeze seals) or during operation. Regarding the locations, we have taken measures to accommodate the equipment as shown below. This will be explained below based on FIG.
第７図において配管１はその外面に予熱ヒータ２が設置
され、更に保温材３で覆われている。予熱ヒータは該配
管１内部ナトリウムが浬転中に固化する可能性が高い事
から通常３００ｍｍから１０００ ＋ｉｎ程度に細区分
され、各々の予熱ヒータは独立して電力を供給するため
の給Ｔｉ、設備４に接続されている。又、各予熱ヒータ
２設置領域には配管材及び内部す１−リウム旦度を検知
するための熱電対５が設置されており、熱電対５からの
信号により配管１温度を制御する制御器６が作動し、所
定の温度を維持するために給電設備からの電力供給量が
制御される。In FIG. 7, a preheater 2 is installed on the outer surface of the pipe 1, and the pipe 1 is further covered with a heat insulating material 3. Since there is a high possibility that the sodium inside the pipe 1 will solidify during pumping, the preheating heater is usually subdivided into 300mm to 1000+in. Connected to 4. Further, a thermocouple 5 for detecting the piping material and internal temperature is installed in each preheating heater 2 installation area, and a controller 6 for controlling the temperature of the piping 1 based on a signal from the thermocouple 5. operates, and the amount of power supplied from the power supply equipment is controlled in order to maintain a predetermined temperature.
万一、配管内ナトリウムが固化し、これを再溶融する場
合は、手動操作又は制御器に予め設定された下記手順に
より固化ナトリウムの再溶融操作を行なう。In the unlikely event that the sodium in the pipe solidifies and you wish to remelt it, perform the remelting operation of the solidified sodium by manual operation or by following the procedure set in advance on the controller.
固化ナトリウムを再溶融させる場合に問題となるのは、
ナトリウムはす１〜リウムを内部に保持する機器・配管
すなわち耐圧境界構成材（−船釣にステンレス鋼が使用
されるので以下Ｓ Ｕ Ｓ ｔｉｌｔという）の約１５
倍もの熱形張係数を有することである。このため、固化
ナトリウムをＲ６温・再溶融する過程では、固化部の端
部から順次昇温を実施し、昇温にともなうナトリウｔ１
とＳＵＳ鋼の熱膨張係数の差から生ずる圧力増加を５Ｕ
ＳＷＪに与えない事が重要である。即ち、ナトリウムが
固化した配管において、もし、両端が固化したままで配
管中の中央部のナトリウムを加熱溶融すると上記圧力の
ためｓｕｓｍが破損する懸念がある。The problem when remelting solidified sodium is
Approximately 15% of the equipment and piping that holds sodium (stainless steel is used for boat fishing, henceforth referred to as SUS tilt))
It has twice the thermal expansion coefficient. Therefore, in the process of remelting solidified sodium at R6 temperature, the temperature is raised sequentially from the end of the solidified part, and as the temperature rises, the sodium t1
The pressure increase caused by the difference in thermal expansion coefficient between
It is important not to give this to SWJ. That is, in a pipe in which sodium has solidified, if the sodium in the center of the pipe is heated and melted while both ends remain solidified, there is a fear that the SUSM may be damaged due to the above pressure.
ぞこで、第７図に示す従来技術では、先ず、ナトリウム
が固化していない側に近い予熱ヒータ２（１１１）に給
電設備４．（ａよ）より電力を供給して昇温し、熱電力
５（ｂ□）によりす１−リウムの融点以上になった事を
確認する。上記が完了したら順次予熱ヒータ２（Ｈ２）
から（Ｉ−１、）まで同様操作を行ない、全てのヒータ
に通電する。In the conventional technique shown in FIG. 7, first, the power supply equipment 4. Electric power is supplied from (a) to raise the temperature, and with thermal power 5 (b□) it is confirmed that the temperature has reached the melting point of 1-lium. Once the above is completed, preheat heater 2 (H2)
Perform the same operation from to (I-1,) to energize all heaters.
なお、上記のような従来技術に関連するものとしては、
特開昭５ｌ−１０１（ｉ９７号、特開昭５０−／１５１
９６号公報がある。In addition, related to the above-mentioned conventional technology,
Unexamined Japanese Patent Publication No. 51-101 (No. i97, Unexamined Japanese Patent Publication No. 50-151)
There is a publication No. 96.
［発明が解決しようとする課題］
上記従来技術はす１ヘリウムの固化区間が非常に短かい
場合や、又、固化の可能性のある領域が限定されている
場合には設備対応も可能であるが。[Problems to be solved by the invention] The above-mentioned conventional technique can be applied to equipment when the solidification section of 1 helium is very short or when the area where solidification is possible is limited. but.
固化区間が広範となる場合には、予熱ヒータの区分数や
給電設備及び熱電対の設置数が膨大となり？！２備建設
費が大１４１に上５Ｌするという問題があった。If the solidification zone is wide, the number of preheater sections, power supply equipment, and thermocouples will be enormous. ! There was a problem in that the construction cost for 2 facilities was 5L on top of 141.
本発明は、不特定の領域においてナトリウムの固化が生
じた場合にも、上記した膨大な設備対応をする事なく安
全に固化す１〜リウムを再溶融させる方法を提供するこ
とを目的とする。An object of the present invention is to provide a method for remelting 1 to 3 lithium which solidifies safely even when solidification of sodium occurs in an unspecified area without requiring the above-mentioned enormous amount of equipment.
［課題を解決するための手段］
本発明は、不特定領域にナトリウム固化が生じた場合、
ナトリウ！、が固化した領域の保温材を撤去し、該領域
の予熱ヒータに通電し、固化領域の端部から順次保温材
を装若するようにしてナトリウムの再溶融を行なうもの
である。[Means for Solving the Problems] The present invention solves the problem when sodium solidification occurs in an unspecified area.
Natoriu! The heat insulating material in the solidified region is removed, the preheater in the region is energized, and the heat insulating material is sequentially re-melted from the end of the solidified region to remelt the sodium.
［作 用］
まず、再溶融しようとするす１ヘリウ１１固化領域の保
温材を撤去する。そして撤去した領域の予熱ヒータに通
電する。このように、保温材が撤去されているので、ヒ
ータに通電しても、ヒータの発熱量の殆んどは外気中に
放散してしまうので、ＳＵＳ鋼や内部固化ナトリウムの
温度上昇は少なく、このため、ナトリウムと５ＵＳｆｑ
８の熱膨張係数の差に起因する圧力増加も少なく、ＳＵ
ＳｗＩの健全性を損なう事はない。[Function] First, the heat insulating material in the solidified region of S1 and S11 that is to be remelted is removed. Then, power is applied to the preheating heater in the removed area. In this way, since the heat insulating material has been removed, even if the heater is energized, most of the heat generated by the heater is dissipated into the outside air, so the temperature rise of the SUS steel and internally solidified sodium is small. Therefore, sodium and 5 USfq
There is also less pressure increase due to the difference in thermal expansion coefficient between SU
The integrity of SwI will not be compromised.
次に、固化領域の端部から例えば３００〜１０００画程
度の長さの保温材を順次装着する。Next, a heat insulating material having a length of, for example, about 300 to 1000 strokes is sequentially attached from the end of the solidified area.
保温材を装着すると、その部分ではヒータの熱が外気に
放散されずにナトリウムに伝わるようになり、固化す１
〜リウムは徐々に溶融し、圧力は溶融すトリウｌ、の方
へ逃げるので、過大な圧力をＳＵＳ鋼に及ぼす事がなく
、ＳＵＳ鋼の健全性を損なう事がない。When a heat insulator is attached, the heat from the heater is transferred to the sodium in that area without being dissipated to the outside air, causing the sodium to solidify.
~The lithium gradually melts and the pressure escapes toward the melting triium, so excessive pressure is not exerted on the SUS steel and the integrity of the SUS steel is not impaired.
上記のようにして、本発明によれば、不特定領域のす１
〜リウム固化に対し、完全にナトリウムの再溶融を行な
うｌｊ（が１＋’Ｊ能となる。As described above, according to the present invention, all unspecified areas can be
〜lj(, which completely remelts sodium with respect to solidification of lithium, becomes 1+'J ability.
［実 施 例コ
息子、本発明の一実施例を第１図から第６図により説明
する。[Embodiment] An embodiment of the present invention will be explained with reference to FIGS. 1 to 6.
第１図において、配管１中には通常時液体金属ナトリウ
ムが内包されており、配管外面の各区分には１本当りの
長さが約３〜５ ｒｎの予熱ヒータ２が夫々取付けられ
ている。配管ｌ及び予熱ヒータ２の外周には放散熱量を
抑制するための保温材３が設置されている。この保温材
は、預ましくは、例えば３００〜１０００丑程度の長さ
にブロック化されている。予熱ヒータ２は通常３〜６本
程度を１ブロツクとして給電設備４から電力が供給され
る。電源は３相交流電源が多く使用され、予熱ヒータ２
は△結線されることが多い。配管表面には、また、熱電
対５が設置され、制御器６を介して給電設ｊｉｆｆ ４
を制御する事により配管温度を所定の温度に維持する。In Fig. 1, a pipe 1 normally contains liquid metal sodium, and a preheater 2 each having a length of about 3 to 5 rn is attached to each section of the pipe's outer surface. . A heat insulating material 3 is installed around the outer periphery of the pipe 1 and the preheater 2 to suppress the amount of heat dissipated. This heat insulating material is preferably formed into a block having a length of, for example, about 300 to 1000 pieces. Electric power is normally supplied to the preheating heaters 2 from the power supply equipment 4 in a block of about 3 to 6 heaters. Three-phase AC power is often used as the power source, and preheater 2
is often connected with a △ wire. A thermocouple 5 is also installed on the surface of the pipe, and a power supply setting jiff 4 is installed via a controller 6.
The pipe temperature is maintained at a predetermined temperature by controlling the temperature.
上述した配管系において、万一、配管内部の液体全屈す
１ヘリウ１１の温度が低下し固化した場合の再溶融方法
を以下に述べる。In the piping system described above, a remelting method in the event that the temperature of the liquid inside the piping 11 drops and solidifies will be described below.
内部ナトリウムが固化した場合には、先ず固化部の保温
材２を撤去する（第３図参照）。次に固化部の予熱ヒー
タ２に給電設備４から電力を供給する。When the internal sodium solidifies, first remove the heat insulating material 2 from the solidified portion (see Figure 3). Next, power is supplied from the power supply equipment 4 to the preheating heater 2 of the solidification section.
上記条件が整った後に、固化部の端部（ナトリウム溶融
側あるいは配管中にナトリウムが内包されていない側）
に３００〜１０００ ＋ｍ＋艮の保温材ご３′を装着す
る（第４図参照）。保温材装着部配管表面には仮設熱電
対７を設置しておく。After the above conditions are met, the end of the solidification part (the sodium melting side or the side where sodium is not included in the piping)
Attach a heat insulating material of 300 to 1000 + m + 3' to the base (see Figure 4). A temporary thermocouple 7 is installed on the surface of the pipe where the heat insulating material is attached.
保温材を装着すると、ヒータの熱が大気中へ放散する量
が小さくなり、熱が配管及びその内部の固化ナトリウム
に伝わるようになるので、保温材装着部の配管１及び内
部固化す１−リウムは徐々に昇温する。熱電対７により
ナトリウムの融点以上になった事を確認する。When the heat insulating material is attached, the amount of heat from the heater dissipated into the atmosphere is reduced, and the heat is transferred to the pipe and the solidified sodium inside it. temperature rises gradually. Confirm with thermocouple 7 that the temperature has exceeded the melting point of sodium.
熱電対７により、金属ナトリウムの融点になったことを
確認したら、熱電対７を取外し、前述したようにして次
の保温材３′を隣の装着部に続けて装着し、熱電対７も
取付ける（第５図参ＩＫＯ０以下順次この操作を繰り返
しく第６図参照）、最終的には第１図に示す如く復旧す
る事により、固化部全域に亘って固化ナトリウムの再溶
融作業は完了する。After confirming with the thermocouple 7 that it has reached the melting point of metallic sodium, remove the thermocouple 7, attach the next heat insulating material 3' to the adjacent attachment part as described above, and then attach the thermocouple 7 as well. (See FIG. 5 and FIG. 6, in which this operation is repeated sequentially from IKO 0 onward.) Finally, by restoring as shown in FIG. 1, the remelting operation of the solidified sodium is completed over the entire solidified portion.
本実施例も、前記従来例も、ナトリウムの固化が想定さ
れる又はその可能性がある配管の全領域に予熱ヒータを
設けることは同じであるが、従来例ではヒータの区分数
、その夫々の給電設備、熱電対の設置数を多くすること
が必要であったのに対し、本発明実施例では、ヒータの
区分数は少なくてよく （従って一本のヒータの長さは
長くてよい）、これに伴い上記設備の数も少なくてよい
。Both this embodiment and the conventional example described above are the same in that preheating heaters are provided in all areas of piping where sodium solidification is expected or possible, but in the conventional example, the number of heater sections and each Whereas it was necessary to increase the number of power supply equipment and thermocouples installed, in the embodiment of the present invention, the number of heater sections may be small (therefore, the length of one heater may be long). Accordingly, the number of the above-mentioned facilities may also be reduced.
本実施例によれば、配管長さが１０〜２０ ｍに及ぶ場
合にも、予熱ヒータの給電設備を従来例の如く細分独立
させないで固化す１〜リウムを安全に再溶融させる事が
可能である。According to this embodiment, even when the length of the piping is 10 to 20 m, it is possible to safely remelt the solidified 1 to 100 ml without having to separate the power supply equipment for the preheating heater into individual subdivisions as in the conventional example. be.
［発明の効果コ
以上詳述したように、本発明によると、ナトリウム配管
に予熱用のヒータとして長いものが適用可能で、その区
分数も少なくてすみ、したがってヒータ給電設４ｉｆｆ
数や温度センサの数も少なくてすみ、しかも、固化す１
〜リウノ、を保温材で細分しながら端から再溶融でき、
したがって、熱膨張差に基づく圧力を、ナトリウム内包
配管に与えることなくナトリウムの再溶融ができる。[Effects of the Invention] As described in detail above, according to the present invention, a long heater can be applied to the sodium pipe as a preheating heater, and the number of sections can be reduced.
The number of sensors and temperature sensors can be reduced, and the solidification rate is less than 1.
~Riuno can be remelted from the edge while being subdivided with heat insulating material,
Therefore, the sodium can be remelted without applying pressure based on the difference in thermal expansion to the sodium-containing piping.
以上のように、本発明を、ナトリウムが固化する可能性
の乱い領域に適用することにより、ヒータ、温度センサ
、給電設備等を多数必要とする従来のものに比較して、
設ｆｌｕ建設費の大巾な削減が期待できる。As described above, by applying the present invention to areas where the possibility of solidification of sodium is disordered, compared to the conventional method that requires a large number of heaters, temperature sensors, power supply equipment, etc.
We can expect a significant reduction in flu construction costs.
第１図は本発明を適用しネ１するす１−リウム内包配管
系の１例を示す図、第２図は第１図の配管のｌｌ７ｉ面
図、第３、第４、第５及び第６図は本発明の方ａ、の異
なる段階をそＪしぞ扛ぶす図、第７図は従来の配’Ｉ？
例を示す図である。
１・配管 ２・・〕−熱ヒータ！３ 作１
６λ月 ａ−Ａ”；電設価５・熱電対
Ｃ〕・・−制御器７ 熱電灯
（他１名）
第
図
６１９−FIG. 1 is a diagram showing an example of a 1-lithium-containing piping system to which the present invention is applied, and FIG. 2 is a ll7i side view of the piping shown in FIG. Fig. 6 is a diagram showing the different stages of the present invention, and Fig. 7 is a diagram showing the conventional arrangement.
It is a figure which shows an example. 1. Piping 2..] - Thermal heater! 3 work 1
6λ month a-A”; Electrical installation price 5/thermocouple
C]...-Controller 7 Thermoelectric lamp (1 other person) Fig. 619-
Claims (1)
された予熱ヒータと、該配管及び該予熱ヒータの外周に
設置された保温材と、該予熱ヒータに電力を供給する給
電設備と、該配管温度を計測するためのセンサと、該給
電設備の電力供給量を制御するための制御器とからなる
ナトリウム使用設備において、配管の内包ナトリウムが
固化したとき、その固化領域の上記保温材を撤去した後
、上記給電設備により上記予熱ヒータに給電した状態に
て、ナトリウム固化領域の端部から限定された長さの保
温材を順次装着する事により上記配管内の固化ナトリウ
ムを再溶融させる事を特徴とするナトリウムの再溶融法
。A pipe that contains sodium inside, a preheater attached to the outer surface of the pipe, a heat insulating material installed around the outer circumference of the pipe and the preheater, power supply equipment that supplies power to the preheater, and the pipe. In sodium-using equipment consisting of a sensor for measuring temperature and a controller for controlling the power supply amount of the power supply equipment, when the sodium contained in the piping solidifies, the above-mentioned heat insulating material in the solidified area is removed. After that, while power is being supplied to the preheating heater by the power supply equipment, the solidified sodium in the piping is remelted by successively installing heat insulating materials of a limited length from the end of the sodium solidification area. A method for remelting sodium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1333961A JP2894756B2 (en) | 1989-12-22 | 1989-12-22 | Sodium remelting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1333961A JP2894756B2 (en) | 1989-12-22 | 1989-12-22 | Sodium remelting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03194500A true JPH03194500A (en) | 1991-08-26 |
| JP2894756B2 JP2894756B2 (en) | 1999-05-24 |
Family
ID=18271923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1333961A Expired - Fee Related JP2894756B2 (en) | 1989-12-22 | 1989-12-22 | Sodium remelting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2894756B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005315515A (en) * | 2004-04-28 | 2005-11-10 | Nippon Soda Co Ltd | Method and device for melting and feeding metallic sodium |
| US10634284B2 (en) | 2016-09-09 | 2020-04-28 | Nvent Services Gmbh | Automated re-melt control systems |
-
1989
- 1989-12-22 JP JP1333961A patent/JP2894756B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005315515A (en) * | 2004-04-28 | 2005-11-10 | Nippon Soda Co Ltd | Method and device for melting and feeding metallic sodium |
| JP4573344B2 (en) * | 2004-04-28 | 2010-11-04 | 日本曹達株式会社 | Metal sodium melt supply apparatus and method |
| US10634284B2 (en) | 2016-09-09 | 2020-04-28 | Nvent Services Gmbh | Automated re-melt control systems |
| US11592144B2 (en) | 2016-09-09 | 2023-02-28 | Nvent Services Gmbh | Automated re-melt control systems |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2894756B2 (en) | 1999-05-24 |
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