The Factors Affecting Volatili-ation Characteristics of Main Organic Chemicals in Nuclear Power Containment

doi:10.7652/xjtuxb202010021

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The Factors Affecting Volatili-ation Characteristics of Main Organic Chemicals in Nuclear Power Containment

更新时间：2025-07-09

- The Factors Affecting Volatili-ation Characteristics of Main Organic Chemicals in Nuclear Power Containment
- Vol. 54, Issue 10, Pages: 168-173+184(2020)
- 作者机构：
  
  中广核研究院有限公司,广东,深圳,518000
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202010021
  CLC： O643.32
- Online First：10 October 2020，
  
  Published：2020
- 稿件说明：
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The Factors Affecting Volatili-ation Characteristics of Main Organic Chemicals in Nuclear Power Containment[J]. 2020, 54(10): 168-173+184.
DOI：

The Factors Affecting Volatili-ation Characteristics of Main Organic Chemicals in Nuclear Power Containment[J]. 2020, 54(10): 168-173+184. DOI： 10.7652/xjtuxb202010021.

摘要

针对核电安全壳检修期间挥发性有机化学品的挥发动力学特性影响因素不明确

导致难以在确保无因挥发性有机物积累所导致的火灾风险的前提下进一步优化打压前的通风时间的问题

通过模拟核电安全壳通风状态

使用质量损失法测试了不同温度和空间气体速度下主要挥发性有机化学品的挥发特性及挥发时间。在温度分别为30、35和40 ℃

空间气体速度分别为1.0、2.0和3.3 h

-1

的条件下

在模拟通风系统中分别测试了使用量最大、挥发速率较低的威第尔清洗剂(达赛特)和螺栓清洗剂

以及挥发速率较高的NEOLUBE No.2核级润滑剂的挥发特性及挥发时间。研究结果表明:3种物质的挥发特性均符合C

-history模型

在较高温度下(40 ℃)

空间气体速度对挥发速率的影响较小

而较低温度下(≤35 ℃)

空间气体速度对挥发速率的影响较大; 以厚度0.50 mm的液膜为例

螺栓清洗剂挥发时间最长

达到134.56 h(30 ℃

空间气体速度为1.0 h

-1

)

显著小于常规的10 d通风时间。将检修时间安排在气温较高的时段

可显著缩短通风时间

进一步提高核电运行时效。

Abstract

Due to the uncertainty of volatili-ation characteristics of the organic chemicals used during maintenance in nuclear power containment

it is difficult to optimi-e the ventilation time before pressuri-ation in the condition of ensuring safety without fire disaster risk. To resolve this issue

the volatili-ation characteristics of the main volatile organic chemicals used during maintenance are tested in a system with simulated ventilation states. The most abundant chemicals with relatively low evaporation rates

including Weidil cleaner and screw cleaner

and the chemicals with rel

atively high evaporation rate

NEOLUBE No. 2 nuclear grade lubricant

are tested to obtain the volatili-ation curves and volatili-ation time at the temperature of 30

35 and 40 -

with the airspeed at 1.0

2.0 and 3.3 h

-1

respectively. The results suggest that the volatili-ation curves of the three chemicals coincide well with the C

-history model. At relatively high temperature(-40 -

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