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On Burning Rate of Sodium Pool Fires

钠池火灾燃烧速度的探讨

基本信息

批准号：
62580178
负责人：
KIKUCHI Yoshihiro
金额：
$ 1.02万
依托单位：
HIROSHIMA UNIVERSITY (1988)Kobe University (1987)
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62580178/
关键词：
Combustion Sodium プール火災

项目摘要

Liquid sodium is used as the coolant of fast breeder reactors. Spillage into atmosphere may lead to fires under the operation temperature. The purpose of this study is to obtain the experimental data of sodium burning which are necessary for the design and security of reactor facilities. In the present experiments sodium pool was burned in the chamber. The effect of oxygan concentration on ignition temperature and burning rate were investigated by the measurements of oxygen consumption and the chemical analysis of reaction products. The measured burning rate was compared with the analytical results. Characteristic behaviors of sodium pool burning were also investigated by visual technigues.1. The flame of sodium was much smaller than that of oil and was limited near the liquid surface. Burning area increased with increasing pool temperature. 2. No ignition occurred in the oxygen concentration less than 5 mol%. 3. Ignition temperature increased with increasing oxygen concentration. 4. The production rate of sodium monoxide was slightly lower with higher oxygen concentration. 5. In lower oxygen concentration (10 mol%) the experimental results of burning rate were higher than calculation by a vapor layer model. In higher oxygen concentration (21 mol%), however, the measured values were lower than the calulation. 6. The residue of sodium oxide which was formed on the pool surface decreased with increasing pool temperature.

液态钠被用作快中子增殖反应堆的冷却剂。泄漏到大气中可能会在工作温度以下引起火灾。本研究的目的是获得反应堆设施设计和安全所必需的钠燃烧实验数据。在本实验中，钠池在腔室中燃烧。通过耗氧量的测定和反应产物的化学分析，研究了氧浓度对着火温度和燃速的影响。测定的燃速与分析结果进行了比较。采用可视化技术研究了钠池燃烧的特征行为.钠的火焰比油的火焰小得多，且仅限于液面附近。燃烧面积随池温的升高而增大。2.在氧浓度小于5mol%时不发生着火。3.着火温度随氧气浓度的增加而升高。4.氧气浓度越高，一氧化钠的生成速率越低。5.在较低氧浓度（10mol%）下，燃烧速率的实验结果高于蒸汽层模型的计算结果。然而，在较高氧浓度（21mol%）下，测量值低于计算值。6.随着熔池温度的升高，熔池表面生成的氧化钠残留量减少。