Air filter to catch radioactive particles - suggestions please

More
8 years 6 months ago #1360 by mw0uzo
Wow again at the initial measurement at 4uSv/hr. Shows how radon can build up in a sealed room. Probably just entering the room provided enough ventilation to clear it? Are you in a high radon area?

Please Log in or Create an account to join the conversation.

More
8 years 6 months ago #1361 by bethsalem
I live in an area which was well known for its mining industry. Nickel, silver, gold and lead were mined here. There are a number of granite and aggregate quarries too, some still active. About two hours drive away is a disused uranium mine. The soil is a mixture of light red clay, sand and boulders. Is it a high radon area? Looking at a radon map of Spain, I would say "no", but the hills to the north-west of me are.

Partly under my apartment block is a Spanish Civil War era air-raid shelter which hasn't been filled in. Also there are a series of fresh water wells, dating from the 19th century and again, not filled in, around the perimeter of the building. I think these are acting as reservoirs for radon. I would love if a proper radon survey was carried out, but it's a bit out of my price range to order one.

I'm just surprised how, in only 4 and a half hours, the reading dropped so dramatically.

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #1364 by bethsalem
Just a quick update.

I'm still testing the filters in the morning and in the evening, and there's been nothing significantly above background level during the time period since the last elevated readings.

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #1383 by bethsalem
Another week's gone past, and there's still no significant above background radiation to report......which is a good thing! :lol:

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #1389 by bethsalem
After 24hrs of no wind and light, sporadic rainfall, no sun and high humidity, the count is back up.

Indoor background averaged out at 0.14 microsieverts this morning, while the front face of the HEPA type filter was registering an average of 0.36 microsieverts.

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #1394 by bethsalem
Readings tonight are still elevated.

Indoor background - 0.15 microsieverts

Air intake side of HEPA type filter - 0.47 microsieverts

Please Log in or Create an account to join the conversation.

Moderators: Gamma-Man
Time to create page: 0.192 seconds
Powered by Kunena Forum
Everything's free. Please support us by considering a donation. Log in first!
Solar powered Raspberry Pi 4 server stats: CPU 28% Memory 13% Swap 13% CPU temp=65.7'C Uptime 10 Days