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公开(公告)号：US3813286A
公开(公告)日：1974-05-28
申请号：US25101672
申请日：1972-05-08
申请人： TRANSFER SYSTEMS
CPC分类号： G01L9/0004 , G01M3/3272 , G21C17/07 , G21C17/102
摘要： A novel fuel element for use in a power-generating nuclear reactor is described. The fuel element features a built-in indicator to indicate failure, and is especially adapted for use in a fuel assembly having a removable top closure. In a preferred embodiment, the indicator is a spring loaded movable pin which is displaced outwardly when the reactor is shut down by the internal element gas pressure. Should the element develop a leak, the spring causes retraction of the pin indicator. A failure sensor is also described.
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公开(公告)号：US3846235A
公开(公告)日：1974-11-05
申请号：US30354872
申请日：1972-11-03
申请人： TRANSFER SYSTEMS
CPC分类号： G21C17/07
摘要： 1. A fuel element for a nuclear reactor comprising an elongated sealed enclosure containing nuclear fuel, said enclosure including at one end a pressure-tight non-magnetic extension, an indicator pin within the enclosure and having a portion comprising ferromagnetic material extending within the said extension, said indicator pin being movable in the elongated direction of the enclosure from a first position to a second position, resilient means connected to the indicator pin for biasing the indicator pin for movement toward the second position, pressure differential means within the enclosure for maintaining the indicator pin in its first position against the force exerted by the resilient means, said pressure differential means being disabled from maintaining the indicator pin in its first position when an opening in the enclosure causes a pressure loss within the enclosure whereby the resilient means displaces the indicator pin to its second position indicative of failed fuel, the pressure-tight extension having a reduced width compared with that of the enclosure portion containing the nuclear fuel, and the ferromagnetic material portion being located entirely within the reduced-width extension of both the first and second positions.
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