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公开(公告)号：US5687205A
公开(公告)日：1997-11-11
申请号：US529229
申请日：1995-09-15
CPC分类号： G21C5/10 , G21C19/00 , G21Y2002/201 , G21Y2002/203 , G21Y2002/206 , G21Y2004/501 , G21Y2004/504 , Y02E30/40 , Y10T408/455 , Y10T408/50 , Y10T408/56245 , Y10T408/895
摘要： A remotely operated drilling tool is configured to produce holes in a core shroud support plate inside of a nuclear reactor vessel. The tool includes a support base that is securely mounted directly above the location where the hole will be formed. In a first operation, a drilling tool is secured to the support base and drills a hole through about 90% of the shroud support plate. The drilling tool includes chip capturing structure to prevent chip created by the machining process from contaminating the water in the reactor vessel. After about 90% of the hole is drilled with the drilling tool, an EDM tool is secured to the support base to machine the remainder of the hole using an EDM process. The EDM tool includes structure for machining the remainder of the hole, removing the slug from the hole, and performing a spotface on the underside of the shroud support plate. The underwater drilling tool is capable of producing high quality holes faster and more efficiently than the current EDM process, while maintaining control of all foreign material, minimizing the deleterious effects on the material being drilled, and reducing the risk associated with poor tool reliability and breakage.
摘要翻译： 远程操作的钻具被配置为在核反应堆容器内的核心护罩支撑板上产生孔。 该工具包括一个可靠地安装在孔形成位置正上方的支撑底座。 在第一操作中，钻具被固定到支撑基座上并钻孔穿过护罩支撑板的大约90％。 钻孔工具包括芯片捕获结构，以防止由加工过程产生的芯片污染反应堆容器中的水。 在使用钻孔工具钻孔的大约90％之后，EDM工具被固定到支撑基座上，以使用EDM工艺加工其余的孔。 EDM工具包括用于加工孔的其余部分的结构，从孔中除去芯块，以及在护罩支撑板的下侧上执行点表面。 水下钻具能够比当前的EDM工艺更快，更有效地生产高质量的孔，同时保持对所有异物的控制，最大限度地减少对被钻探材料的有害影响，并减少与不良工具可靠性和破损相关的风险 。
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公开(公告)号：US06309147B1
公开(公告)日：2001-10-30
申请号：US09073820
申请日：1998-05-06
IPC分类号： B23B4734
CPC分类号： G21C5/10 , G21C19/00 , G21Y2002/201 , G21Y2002/203 , G21Y2002/206 , G21Y2004/501 , G21Y2004/504 , Y02E30/40 , Y10T408/455 , Y10T408/50 , Y10T408/56245 , Y10T408/895
摘要： A remotely operated drilling tool is configured to produce holes in a core shroud support plate inside of a nuclear reactor vessel. The tool includes a support base that is securely mounted directly above the location where the hole will be formed. In a first operation, a drilling tool is secured to the support base and drills a hole through about 90% of the shroud support plate. The drilling tool includes chip capturing structure to prevent chip created by the machining process from contaminating the water in the reactor vessel. After about 90% of the hole is drilled with the drilling tool, an EDM tool is secured to the support base to machine the remainder of the hole using an EDM process. The EDM tool includes structure for machining the remainder of the hole, removing the slug from the hole, and performing a spotface on the underside of the shroud support plate. The underwater drilling tool is capable of producing high quality holes faster and more efficiently than the current EDM process, while maintaining control of all foreign material, minimizing the deleterious effects on the material being drilled, and reducing the risk associated with poor tool reliability and breakage.
摘要翻译： 远程操作的钻具被配置为在核反应堆容器内的核心护罩支撑板上产生孔。 该工具包括一个可靠地安装在孔形成位置正上方的支撑底座。 在第一操作中，钻具被固定到支撑基座上并钻孔穿过护罩支撑板的大约90％。 钻孔工具包括芯片捕获结构，以防止由加工过程产生的芯片污染反应堆容器中的水。 在使用钻孔工具钻孔的大约90％之后，EDM工具被固定到支撑基座上，以使用EDM工艺加工其余的孔。 EDM工具包括用于加工孔的其余部分的结构，从孔中除去芯块，以及在护罩支撑板的下侧上执行点表面。 水下钻具能够比当前的EDM工艺更快，更有效地生产高质量的孔，同时保持对所有异物的控制，最大限度地减少对被钻探材料的有害影响，并减少与不良工具可靠性和破损相关的风险 。
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公开(公告)号：US5802126A
公开(公告)日：1998-09-01
申请号：US848434
申请日：1997-05-08
CPC分类号： G21C5/10 , G21C19/00 , G21Y2002/201 , G21Y2002/203 , G21Y2002/206 , G21Y2004/501 , G21Y2004/504 , Y02E30/40 , Y10T408/455 , Y10T408/50 , Y10T408/56245 , Y10T408/895
摘要： A remotely operated drilling tool is configured to produce holes in a core shroud support plate inside of a nuclear reactor vessel. The tool includes a support base that is securely mounted directly above the location where the hole will be formed. In a first operation, a drilling tool is secured to the support base and drills a hole through about 90% of the shroud support plate. The drilling tool includes chip capturing structure to prevent chip created by the machining process from contaminating the water in the reactor vessel. After about 90% of the hole is drilled with the drilling tool, an EDM tool is secured to the support base to machine the remainder of the hole using an EDM process. The EDM tool includes structure for machining the remainder of the hole, removing the slug from the hole, and performing a spotface on the underside of the shroud support plate. The underwater drilling tool is capable of producing high quality holes faster and more efficiently than the current EDM process, while maintaining control of all foreign material, minimizing the deleterious effects on the material being drilled, and reducing the risk associated with poor tool reliability and breakage.
摘要翻译： 远程操作的钻具被配置为在核反应堆容器内的核心护罩支撑板上产生孔。 该工具包括一个可靠地安装在孔形成位置正上方的支撑底座。 在第一操作中，钻具被固定到支撑基座上并钻孔穿过护罩支撑板的大约90％。 钻孔工具包括芯片捕获结构，以防止由加工过程产生的芯片污染反应堆容器中的水。 在使用钻孔工具钻孔的大约90％之后，EDM工具被固定到支撑基座上，以使用EDM工艺加工其余的孔。 EDM工具包括用于加工孔的其余部分的结构，从孔中除去芯块，以及在护罩支撑板的下侧上执行点表面。 水下钻具能够比当前的EDM工艺更快，更有效地生产高质量的孔，同时保持对所有异物的控制，最大限度地减少对被钻探材料的有害影响，并减少与不良工具可靠性和破损相关的风险 。
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