Automated particulate sampler for Comprehensive Test Ban Treaty verification (the DOE radionuclide aerosol sampler/analyzer)

Bowyer, S.M.; Miley, Harry S.; Thompson, Robert C.; Hubbard, Charles W.

doi:10.1109/23.603709

Cited by 26 publications

(7 citation statements)

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“…For the 238 Fig. 4 Installation of the RASA System at "RN 33" (Mount Schauinsland) observation of particle bound radionuclides for the IMS an automatic system RASA (Radionuclide Aerosol Sampler and Analyzer), which was developed at Pacific Northwest National Laboratory (PNNL) in Richland, USA [4], has been installed and has now started routine operation. The air flow is between 800 and 1000 m 3 h -1 and the reached MDC is below 10 µBq m -3 for 140 Ba.…”

Section: Comprehensive Nuclear-test-ban Treaty (Ctbt)mentioning

confidence: 99%

Monitoring ground-level air for trace analysis: methods and results

Bieringer

Schlosser

2004

Analytical and Bioanalytical Chemistry

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Trace analysis enables the sensitive detection of radionuclide concentrations in ground-level air in the range of microbecquerel per cubic meter (microBq m(-3)). Typical sampling intervals of less than one day up to a few days can be used in routine operation. Trace analysis measurements are performed in the framework of the German Integrated Measuring and Information system (IMIS) and the International Monitoring System (IMS) used for verification of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Within the environmental monitoring programmes of the German IMIS the Federal Office for Radiation Protection (BfS) performs measurements of aerosol-bound radionuclides and of radioactive noble gases in the atmosphere. Aerosols are collected on filters with high-volume air samplers and analysed by gamma-spectrometry, alpha-spectrometry, and integral measurements of beta-activity, with preceding radiochemical separation. Noble gas samples from 15 sites world-wide are analysed to observe the (85)Kr-release from nuclear fuel reprocessing plants and from seven sites in Germany to monitor the (133)Xe emitted from nuclear power plants. As part of the International Monitoring System (IMS) of the CTBT an automatic aerosol sampling and measuring system and an automatic noble gas sampling and measuring system will be operated by the BfS at Mount Schauinsland near Freiburg. Because of its expertise in noble gas measurements the BfS had been chosen to perform an intercomparison experiment in the BfS laboratory in Freiburg with several automatic noble gas sampling and measurement systems before their installation at IMS sites. To establish quality-assurance programmes for trace analysis performed for the German IMIS close collaboration between the involved German institutions has been established. First steps have been taken to expand cooperation to other European laboratories. Informal data exchange already occurs between trace-analysis laboratories in Europe (Ring of Five) and helps in cases of enhanced activity concentrations to get a rapid overview of the radiological situation and to identify possible sources.

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Section: Comprehensive Nuclear-test-ban Treaty (Ctbt)mentioning

confidence: 99%

Monitoring ground-level air for trace analysis: methods and results

Bieringer

Schlosser

2004

Analytical and Bioanalytical Chemistry

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“…The system is located at the BfS Schauinsland monitoring station RN33 (altitude 1200 m, 47.91N, 7.91E). It takes daily high volume (approximately 24,000 m 3 ) air filter samples which are analysed with a high purity germanium detector starting after a 24 h filter period during which short lived radon progeny decays [9].…”

Section: Example 1: Exclusion Of 140 Ba When 140 La Is Measuredmentioning

confidence: 99%

“…Due to the low net counting rates, this is done by calculating the Bayesian confidence (or credibility) limits given by Eqs. (9) and (10) using the solution vector and covariance matrix provided by the Single Value Decomposition algorithm.…”

Section: Example 2: Gamma-spectroscopic Xenon Measurementsmentioning

confidence: 99%

Nuclide ratios and source identification from high-resolution gamma-ray spectra with Bayesian decision methods

Zähringer

Kirchner

2008

Nuclear Instruments and Methods in Physics Research Section A:

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“…The IMS radionuclide station RN33 Schauinsland is instrumented with a RASA high volume aerosol sampler and analyzer, which has been described technically by Bowyer et al (1997), and with an automatic SPALAX noble gas sampler and analyzer (Fontaine et al, 2004).…”

Section: Introductionmentioning

confidence: 99%