一晚上氡气检测出69

[phone]

按37算，有92了，处于临界点附近。

印象中 3pCi/l 是临界点， 对吗？

 

[逍遥客]

为啥我以前用的仪器说超过 4 就超标了？指标单位都有哪些？

 

[月下独酌]

为啥我以前用的仪器说超过 4 就超标了？指标单位都有哪些？

What are the units of measuring radon levels?


The concentration of radon in the air is measured in units of picocuries per litre (pCi/L) or becquerels per cubic meter (Bq/m3). One Bq corresponds to one disintegration per second. One pCi/L is equivalent to 37 Bq/m3.

The concentration of radon daughters is measured in units of working level (WL) which is a measure of the potential alpha particles energy per litre of air. One WL of radon daughters corresponds to approximately 200 pCi/L of radon in a typical indoor environment. However, the relative concentration of radon and radon daughters may vary from one building to another. In the extreme case 1 WL corresponds to 100 pCi/L of radon. This situation is called full equilibrium and is extremely unlikely to occur. Occupational exposure to radon daughters is expressed in working level months (WLM) and a working level month is equivalent to the exposure at an average concentration of 1 WL for 170 working hours. Measurement data are reported in either of the above units. For making comparisons between the data from different sources, the following conversion chart may be useful:

1 pCi/L = 37 Bq/m3

1 m3 = 1000 L

0.01 WL = 74 Bq/m3 = 2 pCi/L

0.02 WL = 148 Bq/m3 = 4 pCi/L

0.1 WL = 800 Bq/m3 = 20 pCi/L

 

[Patio]

印象中 3pCi/l 是临界点， 对吗？

为啥我以前用的仪器说超过 4 就超标了？指标单位都有哪些？

标准不一样。加拿大标准较松，欧洲标准较严。

 

[逍遥客]

What are the units of measuring radon levels?


The concentration of radon in the air is measured in units of picocuries per litre (pCi/L) or becquerels per cubic meter (Bq/m3). One Bq corresponds to one disintegration per second. One pCi/L is equivalent to 37 Bq/m3.

The concentration of radon daughters is measured in units of working level (WL) which is a measure of the potential alpha particles energy per litre of air. One WL of radon daughters corresponds to approximately 200 pCi/L of radon in a typical indoor environment. However, the relative concentration of radon and radon daughters may vary from one building to another. In the extreme case 1 WL corresponds to 100 pCi/L of radon. This situation is called full equilibrium and is extremely unlikely to occur. Occupational exposure to radon daughters is expressed in working level months (WLM) and a working level month is equivalent to the exposure at an average concentration of 1 WL for 170 working hours. Measurement data are reported in either of the above units. For making comparisons between the data from different sources, the following conversion chart may be useful:

1 pCi/L = 37 Bq/m3

1 m3 = 1000 L

0.01 WL = 74 Bq/m3 = 2 pCi/L

0.02 WL = 148 Bq/m3 = 4 pCi/L

0.1 WL = 800 Bq/m3 = 20 pCi/L

谢谢！一会儿研读

 

[rctli]

中国人, 尤其是哥这一代中年人, 爱跟风.

一家搞, 家家搞, 你家有, 我家也买, 最好整条街联合起来搞个团购 ...

然后，你那条街面上氡气超标。

 

[Patio]

第3天读数121，问题严重了。

 

[shimh]

第3天读数121，问题严重了。

氡气读数本来就是这样上上下下的。所以只有长期读数靠谱。

 

[ccc]

第3天读数121，问题严重了。

上排风吧，24/7抽。

 

[Patio]

氡气读数本来就是这样上上下下的。所以只有长期读数靠谱。

说明氡气每天释放量不同，读数都是靠谱的。所以，高标准的话，有一天超标就该治理，除非basement不常用。

 

[ccc]

说明氡气每天释放量不同，读数都是靠谱的。所以，高标准的话，有一天超标就该治理，除非basement不常用。

暖气送风上来，不是照样么。

换房子吧。

 

[shgcn]

为什么我的short term永远显示1天呢？这个short term的日子会不会变啊？说明书上说1-7天

 

[as2610]

为什么我的short term永远显示1天呢？这个short term的日子会不会变啊？说明书上说1-7天

机器下面永远是当天的平均值，上面是从打开机器始到当天的平均值。所以打开机器7天，上面的值就是7天的平均值。

 

[ccc]

买了这东西，不是添堵么。

 

[shimh]

说明氡气每天释放量不同，读数都是靠谱的。所以，高标准的话，有一天超标就该治理，除非basement不常用。

我说按短期的读数判断是否超标不靠谱。氡气对健康的实质影响要看长期，就是一个累计过程。否则，只要大于0都是太多，需要治。再说，200才是标。没mitigation措施，我看氡气在100上下在加拿大氡气“正常”的房子差不多是常态了。

听说空气中的灰尘多些会减少氡气对健康的影响。