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Appendix 12 - Fukushima Daiichi - NC's Monitoring


Advanced Topics 

NC's independent monitoring

Date/Time (CST)

 

 CP5M

 

3.17.11 
9pm
 223
3.18.11
7:30am
204
9:45am 2832
11:30am 250 2
4:30pm 201
3.19.11 8am 233
3.20.11 8am 197
2pm 188 
 3.21.11 8am  225
5pm 202
 3.22.11 8am  212
 3.23.11 1:30pm  237
 3.24.11 5:30pm  212
 3.25.11 2pm  220
 3.26.11 9pm  207
 3.28.11 10am  201
 3.29.11 12pm  218
 3.31.11 12pm  212
 4.1.11 8:15am  205
 4.2.11 10am  198
 4.3.11 5pm  215
 4.4.11 11:30am  187
 4.5.11 8pm  203
  4.6.11 7am  223
12pm 212
  4.7.11 9:15am  198
5:30pm 237 (light rains)
8pm 203; (2 puddles: CP1M= 48, 39)
4.8.11 8:15am  211
12pm 203
4.9.11   
1:45pm 239
1:50pm 219
2pm 231
2:05pm 226
4pm 223
6:45pm 226
10pm 213
 4.10.11 9:30am  203
11:30am 205
8:15pm 224
SURFACE WATER 8:20pm 446 - after 15 min. rain squall1
10pm 208
 4.11.11 8:25am  192
12pm 223
6:30pm 193
 4.12.11 8:40am  201
12:30pm 211
 4.13.11 8:40am  236
8:45am 284
 replaced battery; 8:55am 185
9am 239
11:30am 233
1:15pm 249
4:30pm 247
8:30pm 217
4.14.11 7am  227
2pm 214
5:15pm 233
4.15.11 8am 2342
SURFACE WATER, 11:50am 3943
11:55am 3383
4.16.11 1:30pm  178
9:20pm  205
4.17.11 7pm  231
4.18.11 9:15am  224
1:30pm 214
8pm 2412
4.19.11 9:15am 2532
4.20.11 10am 224
4.21.11 9am 215
1pm 227
4.22.11 12:40pm 2562
surface water, 12:35pm 3243
sorry for break in measurements...back to normal  
4.30.11 6:20pm 187

CP5M is counts per minute over a 5 minute interval.

1 3" above small puddle, 2' from gutter drain; same area, when puddle was gone/dissolved, measured 310 at 10:15pm (4/10) and 302 at 8:30am (4/11) and 296 at 12:10pm (4/11). On 4/10 at 8:30pm, (inside) room under roof = 163 CP5M 
2 Barely drizzling
3 After several hours of light rain; surface water measurement same as footnote 1 

  • 5 minute total counts - in CPMs

  • location: southeast Iowa, USA

  • Instrument: 'Inspector Alert' alpha/beta/gamma

  • through 4/22: 1 meter above-ground in the outdoors, at edge of a concrete sidewalk surrounded by soil and plants and 3 meters from a house.  Post 4/30: similar outdoors location

Background assessment: 

19 readings from 3/14 - 3/17

 Mean: 205.6

1 Standard Deviation (SD) = 22.5 (Range: 183.1 - 228.1)

2 SDs = 45.1 (Range: 160.5 - 250.6)

3 SDs = 67.6 (Range: 138 - 273.2)

More online independent monitoring data this page

To see how far we are from Cold War CPM levels, see links at footnote 39 on this page.  


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Prefixes, conversions and equivalents

Tables about atomic elements, decay charts, fission yields

NuclearCrimes.org's sitemap and various public and government documents of interest we uploaded online: 1. Documents 2. Documents


'The greatest irony of our atmospheric nuclear testing program is that the only victims of U.S. nuclear arms since World War II have been our own people.' 
- Forgotten Guinea Pigs Report, 1980

Tips for arguing with radiation PR people
When they belittle your claims... by comparing any exposure from their facilities to... You say or ask...
...about your exposure to fallout from nuke plants or weapons testing fallout... ....background radiation... 'Background radiation doesn't mean it is harmless - it probably does cause a small portion of cancers.  If you are adding to the background radiation, you are adding to someone's risk.'

'How many more defective children will be born and how many cancers will be induced by this increase in 'background radiation'?

...about your exposure to fallout from nuke plants or weapons testing fallout... ...flying in a airplane... 'That is not a realistic comparison.  Radionuclides in fallout are incorporated into our bodies (tissue, bones).  Most of the radiation from cosmic rays is external.'
...about your exposure to fallout from nuke plants or weapons testing fallout... ... a chest x-ray... 'You don't ingest or inhale the radiation source from x-rays.  An x-ray lasts for a millisecond.  Fallout lingers in body tissue and bones for decades .'
...about your exposure to fallout from nuke plants or weapons testing fallout... ...eating a banana 'Potassium-40 is a naturally occurring radioisotope that has been present in foods and the environment on Earth for billions of years.  Potassium 40, which at normal body levels delivers an annual internal dose to the soft tissue of 20 millirem and 5 millirem to the bone, is not as hazardous as many forms of anthropogenic (meaning: artificial; manmade) radiation for several reasons.  One main reason is, unlike many types of manmade fission products, its environmental levels rarely peak to hundreds or thousands of times normal levels. Since 1945, we've seen a cycle of drastic rising and falling of levels of environmental anthropogenic radiation with nuclear accidents, non-accident releases, radioactivity blowing around, etc...  Another reason: some forms of anthropogenic radiation in the body do much more damage than potassium-40 for the same quantity of radiation. Dose tables printed in a 1970s document (NUREG 1.109 rev. 1 Oct. '77) by the NRC paint a spooky, yet realistic, picture for what happens to a radiation sensitive organ, the thyroid, when iodine-131 is consumed. A NRC formula indicates that 1,000 picocuries of iodine-131 gives a dose of 80 millirems to the adult thyroid and 140 millirems to the thyroid of an infant. Consider: one liter of 'Sunrise Dairy' (Kansas) milk in April 2011 had 1,518 pCi/L of Iodine-131. That was from Fukushima.
...about your exposure to fallout from nuke plants or weapons testing fallout... ...standing next to a smoke alarm.... 'You don't ingest or inhale the Americium-241 from smoke alarms.  You're talking about the small gamma component of Am-241.  That's external exposure.'