☢ Radiation Detection - Driggs, Idaho ☢
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This is a live stream of the Driggs, Idaho radiation detection station. This device was calibrated & certified in 2010 by a Certified Health Physicist in a state laboratory. It's a Ludlum Model 177 ratemeter with a Victoreen 491-30 detector. The…
This is a live stream of the Driggs, Idaho radiation detection station. This device was calibrated & certified in 2010 by a Certified Health Physicist in a state laboratory. It's a Ludlum Model 177 ratemeter with a Victoreen 491-30 detector. The probe is detecting Gamma & X- Ray above 12 keV and beta above 200 keV.
The ratemeter is set to slow response (meter dampening) and alarm lock at 450 CPM. Method: Outdoor Air Sampling at an elevation of 6350 ft. ASL.
Normal Station Background: 20-40 CPM
This instrument is capable of detecting many types of radiation: 131I, 137Cs, 239Pu, 241Pu, 241Am and more. We use a 137Cs check source for systems tests.
We use a Durridge RAD 7 to measure Radon.
Station Log:
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March 7, 2012: Two significant alarm events occurred at 15:41 and 16:50 MST today. Both were strong and ramped the counter to alarm lock at 450 quickly. I was unable to reach the instrument in time to change the range multiplier in order to measure the peak. Both events produced 500+ CPM.
July 28, 2011: We've lost the connectivity at the driggs station and will only be broadcasting when an emergency condition exists.
July 23, 2011: After two days of unusually quiet readings activity is slightly up. We continue measuring Beta, Gamma, X- Ray and Radon. Gamma is slightly up most likely due to the heat induced radon off-gassing at the soil-to-air interface. Radon today is 6.6 pCi/L contributing to the gamma energy activity at the station. Rover INL is continuing to detect an unusual abundance in Gamma / X-Ray energies. Rover INL came back online two days ago with elevated readings. Coordinates of Rover are unknown.
July 13, 2011: Replaced 44-7 probe with 491-30 to better determine the source of the increased beta / gamma being detected in the last 48 hours.
July 12, 2011: Gamma / X-Ray Survey conducted from 1600 to 1900 hrs. Beta was getting swamped this morning by Gamma emissions. Radon is slightly up at 4.2 pCi/L which will contribute in part to the elevated cloud-gamma. Survey results: 70 CPM average of Gamma above 12 keV. Idaho state reports that a large Gamma spike (26 microR/Hr) and trail-off was recorded at Atomic City today, approximately 80 miles SW of this station. Resuming Alpha / Beta / Gamma / X-Ray detection.
July 5, 2011: Elevated beta emission levels continue at this station. Flurries of 100+ CPM with spikes to ~200 CPM have been logged. Radon is stable at 3.3 pCi/L and is not influencing the emission up-trend at this time.
June 27, 2011: Significant increase detected in gross beta & gamma levels. System tests provide normal results. Radon levels are down (3.6) pCi/L and not contributing to increased cloud-gamma.
May 18, 2011: Local power outage (blown transformer) caused stream to go off-air for about 1 hour.
May 5, 2011: Replaced computer power supply. Everything working within normal range again.
April 27, 2011: Changed out probe to 44-7, checked calibration on all scales.
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