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Environmental Radiation Situation

Regular on-site radiological measurements in NRIRR

The NRIRR performs regular radiological on-site ⁽¹⁾ measurements to characterize the environmental radiation situation more than 20 years. Recently, the measurements are performed by the Division of Environmental and Public Radiohygiene of NRIRR. The summary of results has been published weekly, via web, since end of the 1998.

⁽¹⁾: NRIRR is located in South Budapest in Hungary, in Middle Europe.

Gross-beta activity of aerosols (measured after sampling by 72h)

date	activity concentration mBq/m³
16-08-2010	8.1
17-08-2010	7.7
18-08-2010	6.6
19-08-2010	6.7
20-08-2010	5.6
21-08-2010	9.1
22-08-2010	15.9
Minimum and maximum in the last year	0.4 - 18.9

Deposition from the air (fall-out)

date	surface activity concentration mBq/m²/month
date	gross-beta	¹³⁷Cs
jún-2010	33.6	< 0.09
minimum of last year	4.3	< 0.02
maximum of last year	33.6	< 0.20

Environmental gamma dose rate

period	gamma dose rate nSv/h
period	minimum	maximum
23-08-2010 - 08-27	97	108
Previous measurements	95	106

Surface activity of soil by in-situ gamma spectrometry

date	¹³⁷Cs surface activity kBq/m²
02-08-2002	2.9
Previous measurements	1.76

Time courses of gross-beta activity of aerosols

Aerosol gross-beta activity Aerosol gross-beta activity (1 year)

Time course of fall-out activity

Fall-out activity

Time courses of the environmental gamma dose rate

Environmental gamma-dose rate

WARNING! Data measured after 2002 are expressed as ambient dose equivalent rate (red columns) instead of absorbed dose rate (blue columns). For this reason values are greater by about 17% than before.

Revision: 27-08-2010