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首页> 外文会议>Annual Meeting on Nuclear Technology; 20030520-20030522; Berlin; DE >ROCOM experiments on the coolant mixing in the upper plenum of a PWR
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ROCOM experiments on the coolant mixing in the upper plenum of a PWR

机译：ROCOM对压水堆上部气室中冷却液混合的实验

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The reactor core of light water reactors consists of fuel elements with different enrichment and exposure. This circumstance is responsible for differences in the heat release of the single fuel elements. As a consequence, the fuel element outlet temperatures differ, too. Differences of more than 30 K are reached in the stationary state at full power. It is known, that these differences in the outlet temperatures do not fully vanish during the travelling of the coolant through the upper plenum. Thus, a certain temperature profile is still existing over the cross section of the hot leg nozzle. In order to study the coolant mixing inside the upper plenum, special tests have been carried out at the test facility ROCOM (Rossendorf Coolant Mixing Model). This facility represents a KONVOI type PWR (1300 MW_(el)) in a linear scale of 1:5 and has been used during the last four years for the investigation of coolant mixing inside the reactor pressure vessel in a wide range of flow conditions.
机译：轻水反应堆的反应堆堆芯由具有不同富集度和暴露度的燃料元素组成。这种情况是造成单个燃料元件放热差异的原因。结果，燃料元件出口温度也不同。在静止状态下，满功率时的差异超过30K。众所周知，在冷却剂通过上增压室的过程中，出口温度的这些差异不会完全消失。因此，在热管喷嘴的横截面上仍然存在一定的温度分布。为了研究冷却液在上增压室内的混合，已经在测试设备ROCOM（Rossendorf冷却液混合模型）上进行了特殊测试。该设备代表线性比例为1：5的KONVOI型PWR（1300 MW_（el）），并且在过去四年中用于研究反应堆压力容器内各种流动条件下的冷却剂混合情况。

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