RELEASE OF IODINE AND NOBLE-GAS FISSION-PRODUCTS FROM DEFECTED FUEL-ELEMENTS DURING REACTOR SHUTDOWN AND START-UP

被引：18
|
作者：
LEWIS, BJ [1 ]
MACDONALD, RD [1 ]
BONIN, HW [1 ]
机构：
[1] ATOM ENERGY CANADA LTD,CHALK RIVER NUCL LABS,BLOWDOWN TEST FACIL,CHALK RIVER K0J 1J0,ONTARIO,CANADA
来源：
NUCLEAR TECHNOLOGY | 1990年 / 92卷 / 03期
关键词：
D O I：
10.13182/NT90-A16234
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Data from a single defected fuel element operating in-reactor are used to develop a physically based model for describing the increased release of iodine and noble gas fission products to the primary coolant following a reactor shutdown and start-up. Iodines are only released on reactor shutdown, whereas both species are observed on start-up. A dependence on the decay constant of λ-3/2 is typically observed for these transient releases, indicative of a source of release from fuel cracking with little holdup due to transport in the fuel-to-sheath gap.
引用
收藏
页码：315 / 324
页数：10
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