2014/01/15 at 3:10 pm
Took a rain swab off a car here on the 6th January 2013.
This swab was tested using a Theremino Geiger counter kit using a Russian SBT-10 pancake probe. Initial peak was around 5 uSv/hr 3,000 cpm. This is the second hottest rain washout detected here so far.
The decay chart of the rain swab showed classic Radon-222 decay daughter decay.
Here is the scintillator test chart preliminary assessment, of that rain swab. I used experimental MCA Theremino software for this test. It can get a bit noisy near background. This experimental software is pushing the limits of what can be detected with the equipment here. I have placed peak markers at the top of the chart for reference.
The rain swab Geiger counter and scintillator tests showed that the rain event on the 6th January was mainly Radon-222, and Radon-220 washout.
You can see some of the peaks for Radon-222 and Radon-220 decay daughters still present in the test chart. The main peaks are for Radon-220 daughters at, Pb-212 X-ray (77 kev), Lead Pb-212 (238 keV) and Tl-208 (583 keV).
As you can see there is possibly traces of Iodine I-129 (40 keV?), Lead Pb-210 (47keV), U-235 at (185 keV?), and Beryllium Be-7 (477 keV). The peak between the Be-7 and 511 peak markers is probably a sum peak of the two.
Cesium and I-131 in Australia?
Bobby1′s blog has an alternative detailed analysis of the 6th January rain swab scintillator test I did.
Disclaimer: This is an amateur volunteer run service. Human error can provide incorrect information, and equipment malfunction can produce false readings. Do not rely on, or take action upon information presented here, without further research.
2014/01/12 at 2:09 pm
Year Report for 2013,
Monitoring station location http://sccc.org.au/monitoring/Australian-Map.jpg
A large amount of collected recorded data for 2013 has been correlated. The year average background was 22% above the 4 year pre Fukushima average. This is only a very marginal 1% increase over 2012 year 21% increase.
2013 monthly average chart,
2012 monthly average chart,
January 2013 had the highest monthly increase.
The 2013 year average suggests that at present, the Southern Hemisphere increase at the monitoring location has stabilized, with a very marginal year average increase for 2013.
Rain Water Tests Report for 2013
A lot of rain water and car bonnet swabs were conducted during the year. At the beginning of the year, these Geiger counter and scintillator tests manly detected Radon-222 decay daughter isotope washouts, with traces of Beryllium Be-7, Lead Pb-210, Iodine I-129 and Uranium U-235. In July, traces of Thorium Th-234 were detected, plus in September, Radon-220 decay daughter isotopes were also detected for the first time.
If traces of U-235 were detected, it means a lot more Uranium U-238 was in the atmosphere. The detection of I-129 is also of concern, even if it is in trace amounts.
Testing Results can be found here.
Even though the amounts detected maybe below Government set risk levels, it is suggested that those who are using tank water should have very good water filters in place, and those on town water use a good reverse osmosis water filter. Also wash your fruit and vegetables well before cooking and eating.
2014/01/04 at 4:57 pm
4th January 2014,
December 2013 report
Monitoring Station location
December 2013 day average chart,
The December month average was 36% above the pre Fukushima 4 year average, and 7% below the December 2012 month average. This is an indication that the levels are stabilizing, here in the South Hemisphere at this location.
December 2012 day average chart,
The day average charts are colour coded, green is normal level and yellow is the first alert level set by the station operator, me in this case 🙂 . It is not based on any Government risk level.
Sunshine Coast Monitoring Station Alert level explanation,
General increase here on the East Coast of Australia, 54% above average yesterday.
Also, an increase detected on the North Island of New Zealand. They use a scintillator for monitoring, and around 700 to 750 cpm would be average.
New Zealand Monitoring Station