Published March 1988 | Version v1
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Chemical aerosol measurement and analysis in the PAMELA plant in Mol/Belgium

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Description

Radiochemical and conventional analytical methods were applied in order to determine the following: 1) The relative nuclide source strength and the size spectrum of aerosols in the off-gas of the ceramic melter. The measurements were done using the rod-type aerosol sampler SAPHIR of the Radiochemistry Institute of Munich Technical University (RCM). 2) The efficiency of the various off-gas purification stages. Efficiencies were measured using membrane filters placed at the head-end and back-end of every stage parallel with the off-gas stream (decontamination factor DF = specific radioactivity at head-end divided by specific radioactivity at back-end). 3) The remaining radioactivity that is released into the atmosphere. These measurements were done using a series of gas scrubbers in a branch section of the purified off-gas stream. During the measuring campaigns with low enriched waste concentrate and high enriched waste concentrate, until summer 1987 all in all 104 SAPHIR samples and 61 filter or scrubber samples, respectively, were drawn from the PAMELA off-gas. Tables show the significant results. (orig./HP)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

Mit Hilfe radiochemischer und konventioneller Analysentechniken wurden folgende Fragenkomplexe untersucht: 1) Die relative Nuklid-Quellstaerke und das Aerosolgroessenspektrum des Ofenabgases. Beides wurde mit Hilfe eines Stabsonden-Aerosol-Probennehmers fuer hochradioaktiven Betrieb aus dem Institut fuer Radiochemie (SAPHIR) bestimmt, 2) die Wirksamkeiten der einzelnen Abgas-Reinigungsstufen. Sie wurden ermittelt mit Membranfiltern, die vor und hinter jeder Reinigungsstufe dem Abgasstrom parallel geschaltet waren (Dekontaminationsfaktor DF = spez. Radioaktivitaet vor der Stufe geteilt durch spez. Radioaktivitaet nach der Stufe) und 3) die an die Atmosphaere abgegebene Rest-Radioaktivitaet. Sie wurde mit Hilfe einer Kette von Gaswaeschern in einer Abzweigung aus dem gereinigten Abgasstrom gewonnen. In den LEWC (low enriched waste concentrate)- und HEWC (high enriched waste concentrate)-Betriebskampagnen bis zum Sommer 1987 wurden insgesamt 104 SAPHIR-Stabsonden-Proben und 61 Filter- bzw. Waschflaschen-Proben aus dem Abgas der PAMELA gezogen. Die wichtigsten dabei erhaltenen Ergebnisse sind tabellarisch dargestellt. (orig./HP)

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Additional details

Additional titles

Subtitle (English)
Final report
Original title (German)
'Chemische Aerosolmesstechnik' in der PAMELA in Mol/Belgien
Original subtitle (German)
Abschlussbericht.

Publishing Information

Imprint Pagination
177 p.
Report number
RCM--01587/I+II

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
21088157
Subject category
S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
Descriptors DEI
AIR SAMPLERS; CERAMIC MELTERS; DECONTAMINATION; EFFICIENCY; FISSION PRODUCT RELEASE; HIGH-LEVEL RADIOACTIVE WASTES; OFF-GAS SYSTEMS; PAMELA PLANT; PURIFICATION; QUANTITATIVE CHEMICAL ANALYSIS; RADIOACTIVE AEROSOLS; SCRUBBERS; VITRIFICATION
Descriptors DEC
AEROSOLS; CHEMICAL ANALYSIS; CLEANING; COLLOIDS; DISPERSIONS; ELECTRIC FURNACES; EQUIPMENT; FURNACES; LABORATORY EQUIPMENT; MATERIALS; NUCLEAR FACILITIES; POLLUTION CONTROL EQUIPMENT; RADIOACTIVE MATERIALS; RADIOACTIVE WASTE FACILITIES; RADIOACTIVE WASTES; SAMPLERS; SOLS; WASTES