TW202109553A - Method for managing radioactive substance storage container capable of accurately estimating a gas temperature in a lid space and estimating an amount of air leakage in the lid space based on the estimated gas temperature - Google Patents
Method for managing radioactive substance storage container capable of accurately estimating a gas temperature in a lid space and estimating an amount of air leakage in the lid space based on the estimated gas temperature Download PDFInfo
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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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Abstract
Description
本發明係關於一種對具有一次蓋及二次蓋之放射性物質貯藏容器進行管理之方法。The invention relates to a method for managing a radioactive substance storage container with a primary cover and a secondary cover.
核能發電廠中使用之燃料包含高放射性物質,該高放射性物質會產生衰變熱。因此,於一定期間內,於核能發電廠內之池中進行冷卻。其後,收納於放射性物質貯藏容器,向貯藏設備輸送。並且,於收納於放射性物質貯藏容器之狀態下保管。The fuel used in nuclear power plants contains highly radioactive materials, which generate decay heat. Therefore, within a certain period of time, cooling is carried out in the pool in the nuclear power plant. After that, it is stored in a radioactive substance storage container and transported to a storage facility. And, keep it in a state of being stored in a radioactive substance storage container.
放射性物質貯藏容器具有:收納使用過之燃料(放射性物質)之內部空間、覆蓋內部空間之一次蓋、覆蓋一次蓋之二次蓋、及形成於一次蓋與二次蓋之間之蓋部空間。內部空間及蓋部空間以金屬墊片等密封。但需要考慮金屬墊片之密封性能由於某些原因而降低之可能性。因此,內部空間以成為負壓狀態(換言之,壓力低於大氣壓之狀態)之方式填充惰性氣體,蓋部空間以成為正壓狀態(換言之,壓力高於大氣壓之狀態)之方式填充惰性氣體。藉此,雖容許氣體自蓋部空間向內部空間洩漏,但防止了氣體自內部空間向蓋部空間洩漏。The radioactive material storage container has an internal space for storing used fuel (radioactive material), a primary cover covering the internal space, a secondary cover covering the primary cover, and a cover space formed between the primary cover and the secondary cover. The inner space and the cover space are sealed with metal gaskets or the like. However, it is necessary to consider the possibility that the sealing performance of the metal gasket will be reduced due to some reasons. Therefore, the inner space is filled with the inert gas so that it becomes a negative pressure state (in other words, the pressure is lower than the atmospheric pressure), and the cover space is filled with the inert gas so that it becomes a positive pressure state (in other words, the pressure is higher than the atmospheric pressure). This allows gas to leak from the cover space to the internal space, but prevents gas from leaking from the internal space to the cover space.
專利文獻1揭示一種放射性物質貯藏容器之監視方法。於該監視方法中,經由二次蓋之孔及配管將蓋部空間之氣體導入壓力計,藉由壓力計測定蓋部空間之氣體壓力。
[先前技術文獻]
[專利文獻]
[專利文獻1]日本專利特開2011-196715號公報[Patent Document 1] Japanese Patent Laid-Open No. 2011-196715
[發明所欲解決之問題][The problem to be solved by the invention]
雖專利文獻1中未有記載,但可根據蓋部空間之氣體壓力之減少幅度推定蓋部空間之漏氣量。然而,受到外部大氣等之影響,蓋部空間之氣體溫度發生變化,隨之,蓋部空間之氣體壓力亦發生變化。因此,難以精度良好地推定蓋部空間之漏氣量。Although it is not described in
為了解決上述問題,需要獲取蓋部空間之氣體溫度。因此,例如考慮如下方法:追加用以將蓋部空間之氣體導入溫度計之二次蓋之孔,藉由溫度計測定蓋部空間之氣體溫度。但該方法因增加了二次蓋之孔而有可能導致蓋部空間之漏氣量增加,故而欠佳。作為另一方法,例如考慮藉由溫度計測定二次蓋之外表面溫度以代替蓋部空間之氣體溫度之方法。但於該方法中,若二次蓋的外表面溫度相對於蓋部空間之氣體溫度之追隨性差,則蓋部空間之氣體溫度之精度降低。In order to solve the above problems, it is necessary to obtain the gas temperature in the lid space. Therefore, for example, consider the following method: adding a hole for introducing the gas in the cover space into the secondary cover of the thermometer, and measuring the gas temperature in the cover space by the thermometer. However, this method may increase the amount of air leakage in the cover space due to the increase of the holes of the secondary cover, so it is not good. As another method, for example, a method of measuring the outer surface temperature of the secondary cover with a thermometer instead of the gas temperature in the cover space is considered. However, in this method, if the followability of the outer surface temperature of the secondary cover with respect to the gas temperature in the cover space is poor, the accuracy of the gas temperature in the cover space is reduced.
本發明係鑒於上述情況而完成者,其目的在於提供一種能夠精度良好地推定蓋部空間之氣體溫度並利用其精度良好地推定蓋部空間之漏氣量之放射性物質貯藏容器之管理方法。 [解決問題之技術手段]The present invention was made in view of the above circumstances, and its object is to provide a method for managing a radioactive substance storage container capable of accurately estimating the gas temperature in the lid space and using it to accurately estimate the amount of air leakage in the lid space. [Technical means to solve the problem]
為了達成上述目的,本發明係一種放射性物質貯藏容器之管理方法,其以具有收納放射性物質之內部空間、覆蓋上述內部空間之一次蓋、覆蓋上述一次蓋之二次蓋、及形成於上述一次蓋與上述二次蓋之間之蓋部空間的放射性物質貯藏容器為對象,為了維持上述蓋部空間之正壓狀態,而進行向上述蓋部空間供給氣體之氣體填充作業;於本次氣體填充作業時,使用由流量計測定之向上述蓋部空間之氣體供給量與由壓力計測定之氣體供給前及氣體供給後之上述蓋部空間之氣體壓力,算出上述蓋部空間之氣體溫度,使用上述蓋部空間之氣體溫度與氣體供給前之上述蓋部空間之氣體壓力,或使用上述蓋部空間之氣體溫度、氣體供給後之上述蓋部空間之氣體壓力及向上述蓋部空間之氣體供給量,算出氣體供給前之上述蓋部空間之氣體物質量,由前次氣體填充作業時之氣體供給後之上述蓋部空間之氣體物質量與本次氣體填充作業時之氣體供給前之上述蓋部空間之氣體物質量的差,算出前次氣體填充作業時與本次氣體填充作業時之間的期間內上述蓋部空間之漏氣量。 [發明之效果]In order to achieve the above object, the present invention is a management method of a radioactive material storage container, which has an internal space for storing radioactive materials, a primary cover covering the internal space, a secondary cover covering the primary cover, and a secondary cover formed on the primary cover The radioactive substance storage container in the lid space between the secondary lid and the secondary lid is targeted. In order to maintain the positive pressure state of the lid space, the gas filling operation of supplying gas to the lid space is performed; in this gas filling operation Calculate the gas temperature in the cover space using the gas supply amount to the cover space measured by the flowmeter and the gas pressure in the cover space before and after the gas supply measured by the pressure gauge. Use the cover The gas temperature of the space and the gas pressure of the cover space before the gas supply, or the gas temperature of the cover space, the gas pressure of the cover space after the gas supply, and the gas supply amount to the cover space are used to calculate The gas content of the cover space before gas supply is the difference between the gas content of the cover space after the gas supply during the previous gas filling operation and the above cover space before the gas supply during the current gas filling operation For the difference in gas substance quality, the amount of air leakage in the cover space between the time of the previous gas filling operation and the time of this gas filling operation is calculated. [Effects of Invention]
根據本發明,能夠精度良好地推定蓋部空間之氣體溫度,並利用其精度良好地推定蓋部空間之漏氣量。According to the present invention, the gas temperature in the lid space can be accurately estimated, and the amount of air leakage in the lid space can be estimated with high accuracy.
參照圖式對本發明之第1實施方式進行說明。The first embodiment of the present invention will be described with reference to the drawings.
圖1係表示本實施方式中之放射性物質貯藏容器之構造之局部斷裂立體圖。圖2係表示本實施方式中之放射性物質貯藏容器之蓋部空間及相關機器之圖。Fig. 1 is a partially broken perspective view showing the structure of the radioactive substance storage container in this embodiment. Fig. 2 is a diagram showing the lid space of the radioactive substance storage container and related equipment in this embodiment.
本實施方式之放射性物質貯藏容器1具有:有底圓筒狀主體2;內部空間3,其形成於主體2之內側,收納未圖示之複數個使用過之燃料(放射性物質);一次蓋4,其安裝於主體2之開口部,覆蓋內部空間3;二次蓋5,其安裝於主體2之開口部,覆蓋一次蓋4;及蓋部空間6,其形成於一次蓋4與二次蓋5之間。於內部空間3設置有籃7。籃7形成分別收納複數個使用過之燃料之複數個區塊。The radioactive
於一次蓋4與主體2之間設置圓環狀金屬墊片8A,於二次蓋5與主體2之間設置圓環狀金屬墊片8B。藉此,將內部空間3及蓋部空間6密封。但需要考慮金屬墊片8A、8B之密封性能由於某些原因而降低之可能性。因此,內部空間3以成為負壓狀態(換言之,壓力低於大氣壓之狀態)之方式填充惰性氣體(詳細而言,例如氦氣),蓋部空間6以成為正壓狀態(換言之,壓力高於大氣壓之狀態)之方式填充惰性氣體。藉此,雖容許氣體自蓋部空間6向內部空間3洩漏,但防止了氣體自內部空間3向蓋部空間6洩漏。An
本實施方式之放射性物質貯藏容器1進而具有連接於二次蓋5之孔9之配管10、及連接於配管10之壓力計11及閘閥12。壓力計11經由二次蓋5之孔9及配管10導入蓋部空間6之氣體,測定其壓力。藉此,作業人員可監視蓋部空間6之氣體壓力。The radioactive
當藉由壓力計11測定之蓋部空間6之氣體壓力下降時,作業人員將氣體填充裝置13連接於閘閥12。氣體填充裝置13具有:向蓋部空間6供給氣體之氣體供給裝置14、及測定自氣體供給裝置14供給至蓋部空間6之氣體供給量(於本實施方式中,相當於氣體物質量)之流量計15。作業人員為了維持蓋部空間6之正壓狀態,而進行自氣體供給裝置14向蓋部空間6供給氣體之氣體填充作業。When the gas pressure in the
作為本實施方式之特徵,作業人員(或亦可為電腦)於氣體填充作業時,使用藉由流量計15測定之向蓋部空間6之氣體供給量與藉由壓力計11測定之氣體供給前及氣體供給後之蓋部空間6之氣體壓力,算出蓋部空間6之氣體溫度。並且,使用蓋部空間6之氣體溫度與氣體供給前之蓋部空間6之氣體壓力,算出氣體供給前之蓋部空間6之氣體物質量。並且,藉由前次氣體填充作業時之氣體供給後之蓋部空間6之氣體物質量(詳細如下所述)與本次氣體填充作業時之氣體供給前之蓋部空間6之氣體物質量的差,算出前次氣體填充作業時與本次氣體填充作業時之間的期間內蓋部空間6之漏氣量。藉此,作業人員可監視蓋部空間6之漏氣量。As a feature of this embodiment, the operator (or a computer) uses the gas supply amount to the
接下來,對具有上述特徵之本實施方式之放射性物質貯藏容器之管理方法進行說明。圖3係表示本實施方式中之放射性物質貯藏容器之管理方法之概要之流程圖。圖4係表示本實施方式中之第1次氣體填充作業之概要之流程圖。圖5係表示本實施方式中之第2次以後之各氣體填充作業之概要之流程圖。再者,圖中之「i」表示向放射性物質貯藏容器1之蓋部空間6供給氣體之氣體填充作業係第幾次。Next, the management method of the radioactive substance storage container of the present embodiment having the above-mentioned characteristics will be explained. Fig. 3 is a flowchart showing the outline of the management method of the radioactive substance storage container in this embodiment. FIG. 4 is a flowchart showing the outline of the first gas filling operation in this embodiment. FIG. 5 is a flowchart showing the outline of each gas filling operation after the second time in this embodiment. Furthermore, "i" in the figure indicates the number of gas filling operations for supplying gas to the
作業人員將放射性物質貯藏容器1放入核能發電廠內之池中,於放射性物質貯藏容器1之內部空間3收納複數個使用過之燃料,於放射性物質貯藏容器1之開口部安裝一次蓋4。其後,自核能發電廠內之池中取出放射性物質貯藏容器1,藉由真空乾燥裝置(未圖示)對放射性物質貯藏容器1之內部空間3進行真空乾燥。其後,以內部空間3之氣體壓力成為負壓(詳細而言,例如為0.08 MPa)之方式,經由未圖示之一次蓋4之孔及配管,自氣體填充裝置13向內部空間3供給氣體。其後,自一次蓋4之孔卸除配管及氣體填充裝置13,堵塞一次蓋4之孔。The operator puts the radioactive
繼而,作業人員於放射性物質貯藏容器1之開口部安裝二次蓋5,藉由真空乾燥裝置對放射性物質貯藏容器1之蓋部空間6進行真空乾燥。其後,如圖3之步驟S100所示,進行第1次氣體填充作業。於第1次氣體填充作業中,經由二次蓋5之孔9及配管10,自氣體填充裝置13向蓋部空間6供給氣體,直至蓋部空間6之氣體壓力達到上限值(詳細而言,例如為0.4 MPa)(參照圖4之步驟S101)。又,藉由流量計15測量向蓋部空間6之氣體供給量ΔN1
,將其作為氣體供給後之蓋部空間6之氣體物質量N1_B
,與時刻t1_B
一併記錄(參照圖4之步驟S102)。Then, the operator installs the
繼而,作業人員將放射性物質貯藏容器1向貯藏設備輸送,於貯藏設備中保管。於放射性物質貯藏容器1保管中,作業人員藉由壓力計11監視蓋部空間6之氣體壓力。即,經過圖3之步驟S103進入步驟S104,判定由壓力計11測定之蓋部空間6之氣體壓力是否下降至下限值(詳細而言,例如為0.3 MPa)。若由壓力計11測定之蓋部空間6之氣體壓力超過下限值,經過特定之時間後,重複步驟S104之判定。另一方面,若由壓力計11測定之蓋部空間6之氣體壓力為下限值以下,進入步驟S105,進行第2次氣體填充作業。Then, the operator transports the radioactive
於第2次氣體填充作業中,作業人員以壓力計11測量氣體供給前之蓋部空間6之氣體壓力P2_A
,且將其與時刻t2_A
一併記錄(參照圖5之步驟S106)。其後,經由二次蓋5之孔9及配管10,自氣體填充裝置13向蓋部空間6供給氣體,直至蓋部空間6之氣體壓力達到上限值為止(參照圖5之步驟S107)。又,以流量計15測量向蓋部空間6之氣體供給量ΔN2
,以壓力計11測量氣體供給後之蓋部空間6之氣體壓力P2_B
,且將其等與時刻t2_B
一併記錄(參照圖5之步驟S108、S109)。In the second gas filling operation, the operator uses the
其後,作業人員使用第2次氣體填充作業中向蓋部空間6之氣體供給量ΔN2
、氣體供給前之蓋部空間6之氣體壓力P2_A
及氣體供給後之蓋部空間6之氣體壓力P2_B
,算出蓋部空間6之氣體溫度T2
,且將其記錄(參照圖5之步驟S110)。若詳細說明,則假定蓋部空間6之氣體溫度於氣體供給前與氣體供給後無變化。其原因在於,從氣體填充裝置13向蓋部空間6供給之氣體相對於蓋部空間6殘留之氣體而言物質量較少,且相對於金屬製一次蓋4及二次蓋5而言熱容量非常小之緣故。由上述假定,將氣體狀態方程式變形,而導出下述式(1)(其中,i=2、3、…)。式中之V為蓋部空間6之容積,基於例如放射性物質貯藏容器1之設計尺寸或測定尺寸而預先算出。式中之R為氣體常數。
Ti
=(Pi_B
-Pi_A
)×V/(ΔNi
×R) …(1) Thereafter, the operator uses the gas supply amount ΔN 2 to the
對上述式(1)代入向蓋部空間6之氣體供給量ΔN2
、氣體供給前之蓋部空間6之氣體壓力P2_A
及氣體供給後之蓋部空間6之氣體壓力P2_B
,算出蓋部空間6之氣體溫度T2
,且將其記錄。On behalf of the above formula (1) into ΔN 2 to the gas supply amount of the cap portion of
其後,作業人員對氣體狀態方程式代入蓋部空間6之氣體溫度T2
與氣體供給前之蓋部空間6之氣體壓力P2_A
,算出氣體供給前之蓋部空間6之氣體物質量N2_A
,且將其與上述時刻t2_A
建立關聯並記錄(參照圖5之步驟S111)。又,由氣體供給前之蓋部空間6之氣體物質量N2_A
與向蓋部空間6之氣體供給量ΔN2
之和,算出氣體供給後之蓋部空間6之氣體物質量N2_B
,且將其與上述時刻t2_B
建立關聯並記錄(參照圖5之步驟S112)。After that, the operator substitutes the gas temperature T 2 in the
其後,如圖3之步驟S113所示,作業人員由第1次氣體填充作業時之氣體供給後之蓋部空間6之氣體物質量N1_B
與第2次氣體填充作業時之氣體供給前之蓋部空間6之氣體物質量N2_A
的差,算出第1次氣體填充作業時與第2次氣體填充作業時之間的期間內蓋部空間6之漏氣量Q2
。藉此,作業人員可監視蓋部空間6之漏氣量。Thereafter, as shown in step S113 of FIG. 3, the operator changes from the gas content N 1_B in the
其後,經過圖3之步驟S114進入步驟S104之判定。於藉由壓力計11測定之蓋部空間6之氣體壓力超過下限值之情形時,經過特定之時間後,重複步驟S104之判定。另一方面,於藉由壓力計11測定之蓋部空間6之氣體壓力為下限值以下之情形時,進入步驟S105,進行第3次氣體填充作業。After that, it goes through step S114 in FIG. 3 and proceeds to the determination of step S104. When the gas pressure in the
於第3次氣體填充作業中,作業人員藉由壓力計11測量氣體供給前之蓋部空間6之氣體壓力P3_A
,並將其與時刻t3_A
一併記錄(參照圖5之步驟S106)。其後,經由二次蓋5之孔9及配管10,自氣體填充裝置13向蓋部空間6供給氣體,直至蓋部空間6之氣體壓力達到上限值(參照圖5之步驟S107)。又,藉由流量計15測量向蓋部空間6之氣體供給量ΔN3
,藉由壓力計11測量氣體供給後之蓋部空間6之氣體壓力P3_B
,並將該等與時刻t3_B
一併記錄(參照圖5之步驟S108、S109)。In the third gas filling operation, the operator uses the
其後,作業人員使用第3次氣體填充作業中之向蓋部空間6之氣體供給量ΔN3
、氣體供給前之蓋部空間6之氣體壓力P3_A
及氣體供給後之蓋部空間6之氣體壓力P3_B
,算出蓋部空間6之氣體溫度T3
,並將其記錄(參照圖5之步驟S110)。其後,使用蓋部空間6之氣體溫度T3
與氣體供給前之蓋部空間6之氣體壓力P3_A
,算出氣體供給前之蓋部空間6之氣體物質量N3_A
,並將其與上述時刻t3_A
相關聯地記錄(參照圖5之步驟S111)。又,藉由氣體供給前之蓋部空間6之氣體物質量N3_A
與向蓋部空間6之氣體供給量ΔN3
之和,算出氣體供給後之蓋部空間6之氣體物質量N3_B
,並將其與上述時刻t3_B
相關聯地記錄(參照圖5之步驟S112)。 Thereafter, the operator uses the gas supply amount ΔN 3 to the
其後,如圖3之步驟S113所示,作業人員藉由第2次氣體填充作業時之氣體供給後之蓋部空間6之氣體物質量N2_B
與第3次氣體填充作業時之氣體供給前之蓋部空間6之氣體物質量N3_A
的差,算出第2次氣體填充作業時與第3次氣體填充作業時之間之期間內蓋部空間6之漏氣量Q3
。藉此,作業人員可監視蓋部空間6之漏氣量。之後進行與上述相同之程序。Thereafter, as shown in step S113 of FIG. 3, the operator uses the gas content N 2_B in the
如上所述,於本實施方式中,於氣體填充作業時,使用藉由流量計15測定之向蓋部空間6之氣體供給量與藉由壓力計11測定之氣體供給前及氣體供給後之蓋部空間6之氣體壓力,算出蓋部空間6之氣體溫度。藉此,與藉由溫度系統測定二次蓋5之外表面溫度以代替蓋部空間6之氣體溫度之情形相比,可精度良好地推定蓋部空間6之氣體溫度。又,與為了藉由溫度計測定蓋部空間6之氣體溫度而追加將蓋部空間6之氣體導入溫度計之二次蓋5之孔之情形相比,可抑制蓋部空間6之漏氣量。As described above, in the present embodiment, in the gas filling operation, the gas supply amount to the
又,於本實施方式中,於氣體填充作業時,使用上述蓋部空間6之氣體溫度與氣體供給前之蓋部空間6之氣體壓力,算出氣體供給前之蓋部空間6之氣體物質量。並且,藉由前次氣體填充作業時之氣體供給後之蓋部空間6之氣體物質量與本次氣體填充作業時之氣體供給前之蓋部空間6之氣體物質量的差,算出前次氣體填充作業時與本次氣體填充作業時之間的期間內蓋部空間6之漏氣量。因此,可精度良好地推定蓋部空間6之漏氣量。Furthermore, in this embodiment, during the gas filling operation, the gas temperature in the
使用圖6對本發明之第2實施方式進行說明。圖6係表示本實施方式中之放射性物質貯藏容器之管理方法之概要之流程圖。再者,於本實施方式中,與第1實施方式同等之部分標附同一符號,並適當省略說明。The second embodiment of the present invention will be described with reference to FIG. 6. Fig. 6 is a flowchart showing the outline of the management method of the radioactive substance storage container in this embodiment. In addition, in this embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and descriptions are omitted as appropriate.
於本實施方式中,於圖6之步驟S113中,算出前次氣體填充作業時與本次氣體填充作業時之間的期間內之蓋部空間6之漏氣量Qi
後,進入步驟S115。於步驟S115中,將步驟S113中算出之蓋部空間6之漏氣量Qi
假定為前次氣體填充作業時與本次氣體填充作業時之間的期間內之內部空間3之氣體增加量ΔMi
,算出本次氣體填充作業時之內部空間3之氣體壓力Pi_C
。In the present embodiment, in the step S113 of FIG. 6, after calculating the space within the cap portion between the period when the current and previous gas filling operation when the amount of leakage gas filling work of 6 Q i, proceeds to step S115. In step S115, the air leakage amount Q i of the
具體地對算出第2次氣體填充作業時之內部空間3之氣體壓力P2_C
之方法進行說明。作業人員將放射性物質貯藏容器1放入核能發電廠內之池中,於放射性物質貯藏容器1之內部空間3收納複數個使用過之燃料,於放射性物質貯藏容器1之開口部安裝一次蓋4。其後,自核能發電廠內之池中取出放射性物質貯藏容器1,藉由真空乾燥裝置(未圖示)對放射性物質貯藏容器1之內部空間3進行真空乾燥。其後,以內部空間3之氣體壓力成為負壓(詳細而言,例如為0.08 MPa)之方式,將圖2所示之附有流量計15之氣體填充裝置13連接於一次蓋4之孔及配管(未圖示),自氣體填充裝置13向內部空間3供給氣體。此時,藉由流量計15測量內部空間3之氣體填充時之向內部空間3之氣體供給量,記錄為第1次氣體填充作業時之內部空間3之氣體物質量M1
。對該內部空間3之氣體物質量M1
加上內部空間3之氣體增加量ΔM2
(=Q2
),算出第2次氣體填充作業時之內部空間3之氣體物質量M2
並記錄。再者,內部空間3之氣體溫度例如基於收納於內部空間3之使用過之燃料之發熱量等而推定,內部空間3之容積例如基於放射性物質貯藏容器1之設計尺寸或測定尺寸而算出。並且,對氣體狀態方程式代入上述內部空間3之氣體物質量M2
等,算出第2次氣體填充作業時之內部空間3之氣體壓力P2_C
。 The method of calculating the gas pressure P 2_C of the
對算出第3次氣體填充作業時之內部空間3之氣體壓力P3_C
之方法進行說明。對內部空間3之氣體物質量M2
加上內部空間3之氣體增加量ΔM3
(=Q3
),算出第3次氣體填充作業時之內部空間3之氣體物質量M3
並記錄。繼而,對氣體狀態方程式代入上述內部空間3之氣體物質量M3
等,算出第3次氣體填充作業時之內部空間3之氣體壓力P3_C
。 The method of calculating the gas pressure P 3_C of the
於本實施方式中,作業人員可判斷內部空間3之負壓狀態是否得以維持。In this embodiment, the operator can determine whether the negative pressure state of the
再者,於第2實施方式中,舉出如下情形為例進行說明:對前次氣體填充作業時之內部空間3之氣體物質量Mi - 1
加上內部空間3之氣體增加量ΔMi
,算出本次氣體填充作業時之內部空間3之氣體物質量Mi
,並利用其算出本次氣體填充作業時之內部空間3之氣體壓力Pi_C
;但並不限於此,可於不脫離本發明之主旨之範圍內進行變化。例如,亦可使用內部空間3之氣體增加量ΔMi
,算出本次氣體填充作業時之內部空間3之氣體壓力Pi_C
與前次氣體填充作業時之內部空間3之氣體壓力Pi - 1_C
的差(Pi_C
-Pi - 1_C
)後,算出內部空間3之氣體壓力Pi_C
。Furthermore, in the second embodiment, an example will be described as an example a situation: when the internal gas of the previous filling operation of gas space was 3 mass M i - 1 plus the
具體地對算出第2次氣體填充作業時之內部空間3之氣體壓力P2_C
之方法進行說明。對與上述式(1)大致相同之式代入內部空間3之氣體增加量ΔM2
等,算出第2次氣體填充作業時之內部空間3之氣體壓力P2_C
與第1次氣體填充作業時之內部空間3之氣體壓力P1_C
之差(P2_C
-P1_C
)。內部空間3之氣體壓力P1_C
例如設為內部空間3之氣體填充時之內部空間3之氣體壓力之上限值,將其與上述差相加,算出內部空間3之氣體壓力P2_C
並記錄。 The method of calculating the gas pressure P 2_C of the
對算出第3次氣體填充作業時之內部空間3之氣體壓力P3_C
之方法進行說明。對與上述式(1)大致相同之式代入內部空間3之氣體增加量ΔM3
等,算出第3次氣體填充作業時之內部空間3之氣體壓力P3_C
與第2次氣體填充作業時之內部空間3之氣體壓力P2_C
之差(P3_C
-P2_C
)。將內部空間之氣體壓力P2_C
與上述差相加,算出內部空間3之氣體壓力P3_C
並記錄。 The method of calculating the gas pressure P 3_C of the
於本變化例中,亦可獲得與第2實施方式相同之效果。In this modified example, the same effect as in the second embodiment can also be obtained.
利用圖7對本發明之第3實施方式進行說明。圖7係表示本實施方式中之放射性物質貯藏容器之管理方法之概要之流程圖。再者,於本實施方式中,與第1實施方式同等之部分標附同一符號,並適當省略說明。The third embodiment of the present invention will be described with reference to FIG. 7. FIG. 7 is a flowchart showing the outline of the management method of the radioactive substance storage container in this embodiment. In addition, in this embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and descriptions are omitted as appropriate.
於本實施方式中,於圖7之步驟S113中,算出前次氣體填充作業時與本次氣體填充作業時之間之期間內蓋部空間6之漏氣量Qi
(=Ni - 1_B
-Ni_A
)後,進入步驟S116。於步驟S116中,以前次氣體填充作業時與本次氣體填充作業時之間的時間(ti_A
-ti-1_B
)除以步驟S113中算出之蓋部空間6之漏氣量Qi
,算出蓋部空間6之漏氣率Si
。具體而言,例如,以第1次氣體填充作業時與第2次氣體填充作業時之間的時間(t2_A
-t1_B
)除以第1次氣體填充作業時與第2次氣體填充作業時之間的期間內之蓋部空間6之漏氣量Q2
,算出蓋部空間6之漏氣率S2
。又,例如,以第2次氣體填充作業時與第3次氣體填充作業時之間的時間(t3_A
-t2_B
)除以第2次氣體填充作業時與第3次氣體填充作業時之間的期間內之蓋部空間6之漏氣量Q3
,算出蓋部空間6之漏氣率S3
。In the present embodiment, in the step S113 of FIG. 7, the lid portion calculating the time period between the current and the previous gas filling operation when the amount of leakage gas filling the working
於本實施方式中,作業人員可藉由判斷蓋部空間6之漏氣率Si
是否低於規定值,而評估金屬墊片8A、8B之密封性能是否充分。In the present embodiment, the determination by the operator can cover the
再者,於第2實施方式中,於圖6之步驟S115中,以算出內部空間3之氣體壓力Pi_C
之情形為例進行說明,於第3實施方式中,於圖7之步驟S116中,以算出蓋部空間6之漏氣率Si
之情形為例進行說明,但並不限於此,亦可進行步驟S115、S116兩者。Furthermore, in the second embodiment, in step S115 in FIG. 6, the case of calculating the gas pressure P i_C of the
又,於第1~第3實施方式中,舉出如下情形為例進行說明:使用蓋部空間6之氣體溫度Ti
與氣體供給前之蓋部空間6之氣體壓力Pi_A
,算出氣體供給前之蓋部空間6之氣體物質量Ni_A
,由氣體供給前之蓋部空間6之氣體物質量Ni_A
與向蓋部空間6之氣體供給量ΔNi
之和,算出氣體供給後之蓋部空間6之氣體物質量Ni_B
,但並不限於此,可於不脫離本發明之主旨之範圍內進行變化。例如,亦可使用蓋部空間6之氣體溫度Ti
與氣體供給後之蓋部空間6之氣體壓力Pi_B
,算出氣體供給後之蓋部空間6之氣體物質量Ni_B
。又,亦可由氣體供給後之蓋部空間6之氣體物質量Ni_B
與向蓋部空間6之氣體供給量ΔNi
之差(換言之,使用蓋部空間6之氣體溫度Ti
、氣體供給後之蓋部空間6之氣體壓力Pi_B
及向蓋部空間6之氣體供給量ΔNi
),算出氣體供給前之蓋部空間6之氣體物質量Ni_A
。In addition, in the first to third embodiments, the following case is taken as an example: the gas temperature T i of the
又,於第1~第3實施方式中,舉出使用放射性物質貯藏容器1之設計尺寸或測定尺寸算出蓋部空間6之容積V之情形為例進行說明,但並不限於此,可於不脫離本發明之主旨之範圍內進行變化。例如,亦可於放射性物質貯藏容器1之內部空間3未收納使用過之燃料之狀態下,向蓋部空間6供給氣體,使用此時測定之值,算出蓋部空間6之容積V。若詳細地說明,則因處於放射性物質貯藏容器1之內部空間3未收納使用過之燃料之狀態,故視作蓋部空間6之氣體溫度與二次蓋5之外表面溫度相同,藉由溫度計測定二次蓋5之外表面溫度。並且,亦可使用蓋部空間6之氣體溫度、藉由流量計15測定之向蓋部空間6之氣體供給量、及藉由壓力計11測定之氣體供給前及氣體供給後之蓋部空間6之氣體壓力,算出蓋部空間6之容積V(參照上述式(1))。In addition, in the first to third embodiments, a case where the volume V of the
1:放射性物質貯藏容器
2:主體
3:內部空間
4:一次蓋
5:二次蓋
6:蓋部空間
7:籃
8A:金屬墊片
8B:金屬墊片
9:孔
10:配管
11:壓力計
12:閘閥
13:氣體填充裝置
14:氣體供給裝置
15:流量計1: Radioactive material storage container
2: main body
3: Internal space
4: cover once
5: Secondary cover
6: Cover space
7:
圖1係表示本發明之第1實施方式中之放射性物質貯藏容器之構造之局部斷裂立體圖。 圖2係表示本發明之第1實施方式中之放射性物質貯藏容器之蓋部空間及相關機器之圖。 圖3係表示本發明之第1實施方式中之放射性物質貯藏容器之管理方法之概要之流程圖。 圖4係表示本發明之第1實施方式中之第1次氣體填充作業之概要之流程圖。 圖5係表示本發明之第1實施方式中之第2次以後之各氣體填充作業之概要之流程圖。 圖6係表示本發明之第2實施方式中之放射性物質貯藏容器之管理方法之概要之流程圖。 圖7係表示本發明之第3實施方式中之放射性物質貯藏容器之管理方法之概要之流程圖。Fig. 1 is a partially broken perspective view showing the structure of the radioactive substance storage container in the first embodiment of the present invention. Fig. 2 is a diagram showing the lid space of the radioactive substance storage container and related equipment in the first embodiment of the present invention. Fig. 3 is a flow chart showing the outline of the management method of the radioactive substance storage container in the first embodiment of the present invention. 4 is a flowchart showing the outline of the first gas filling operation in the first embodiment of the present invention. FIG. 5 is a flowchart showing the outline of each gas filling operation after the second time in the first embodiment of the present invention. Fig. 6 is a flow chart showing the outline of the management method of the radioactive substance storage container in the second embodiment of the present invention. Fig. 7 is a flowchart showing the outline of the method of managing the radioactive substance storage container in the third embodiment of the present invention.
1:放射性物質貯藏容器 1: Radioactive material storage container
2:主體 2: main body
3:內部空間 3: Internal space
4:一次蓋 4: cover once
5:二次蓋 5: Secondary cover
6:蓋部空間 6: Cover space
8A:金屬墊片 8A: Metal gasket
8B:金屬墊片 8B: Metal gasket
9:孔 9: Hole
10:配管 10: Piping
11:壓力計 11: Pressure gauge
12:閘閥 12: Gate valve
13:氣體填充裝置 13: Gas filling device
14:氣體供給裝置 14: Gas supply device
15:流量計 15: Flowmeter
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JPS62179699A (en) * | 1986-02-03 | 1987-08-06 | 株式会社日立製作所 | Storage vessel for spent fuel |
JP3935811B2 (en) * | 2002-09-30 | 2007-06-27 | 三菱重工業株式会社 | Metal gasket, manufacturing method thereof, and radioactive substance storage container |
JP4443988B2 (en) * | 2004-04-16 | 2010-03-31 | 三菱重工業株式会社 | Status detector for radioactive material containers |
US9514853B2 (en) * | 2010-08-12 | 2016-12-06 | Holtec International | System for storing high level radioactive waste |
CN102420021B (en) * | 2011-11-15 | 2014-11-26 | 中广核工程有限公司 | Nuclear power station containment vessel leakage rate monitoring method and system |
CN102928182B (en) * | 2012-11-01 | 2016-02-03 | 辽宁省电力有限公司电力科学研究院 | Leakage test device for mechanical penetration piece of nuclear power plant containment vessel |
CN103903660B (en) * | 2012-12-26 | 2016-12-28 | 中国辐射防护研究院 | A kind of halogen generator |
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2019
- 2019-08-28 JP JP2019155402A patent/JP7096802B2/en active Active
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2020
- 2020-08-25 TW TW109128953A patent/TWI745047B/en active
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JP7096802B2 (en) | 2022-07-06 |
JP2021032792A (en) | 2021-03-01 |
TWI745047B (en) | 2021-11-01 |
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