公开(公告)号：US4863679A

公开(公告)日：1989-09-05

申请号：US59175

申请日：1987-06-12

申请人： Hiromichi Imahashi ,  Toshio Kubo ,  Kazumi Asahi ,  Hideyuki Mukai ,  Keizo Ogata

发明人： Hiromichi Imahashi ,  Toshio Kubo ,  Kazumi Asahi ,  Hideyuki Mukai ,  Keizo Ogata

IPC分类号： G21C3/20

CPC分类号： G21C3/20 ,  G21Y2002/103 ,  G21Y2004/10 ,  G21Y2004/201 ,  G21Y2004/30 ,  Y02E30/40

摘要： Disclosed are a cladding tube for a nuclear fuel and a nuclear fuel element incorporating the cladding tube. The cladding tube consists of an inner zirconium liner layer and an outer zirconium alloy layer. The cladding tube has at least one of the following features: (I) the ratio a/b of the oxygen content a to iron content b in the zirconium liner layer is greater than 1.0, (II) the zirconium liner layer is made of a zirconium into the matrix of which impurities are dissolved, and (III) the second phase particles having microscopic sizes and dispersed in the inner surface of the zirconium liner layer and/or the outer surface of the zirconium alloy layer have been removed substantially. Owing to these features, undesirable stress corrosion cracking and local corrosion are remarkably suppressed in the cladding tube and the nuclear fuel element of the invention.

摘要翻译： 公开了一种用于核燃料的包覆管和结合有包层管的核燃料元件。 包层管由内锆衬层和外锆合金层组成。 包壳管具有以下特征中的至少一个：（I）锆衬层中氧含量a与铁含量b的比a / b大于1.0，（II）锆衬层由 锆溶解在其中溶解有杂质的基质中，并且（III）已经除去了具有微观尺寸并分散在锆衬层的内表面和/或锆合金层的外表面的第二相颗粒。 由于这些特征，在本发明的包层管和核燃料元件中，显着地抑制了不期望的应力腐蚀开裂和局部腐蚀。