Published 1962 | Version v1
Miscellaneous Open

Decontamination tests of platelets in NS 22S stainless steel welded under argon

Creators

Description

The authors report tests which aimed at improving the decontamination factor in laboratory in order to adapt the obtained results at an industrial level. Samples are made in NS 22S stainless steel, and are contaminated in an active solution of fission products. Platelets are processed with an apparatus which comprises a tank with a coolant above it, and are equipped with an adjustable heating and an agitation system. Platelet activity measurements are performed before and after treatment. The influences of time, reactant concentration and pool temperature are studied. It is noticed that the residual activity is always due to zirconium-95, even for decontamination factors of 95 per cent

Abstract (French)

Ces essais ont pour but d'ameliorer en laboratoire le facteur de decontamination afin d'adapter industriellement les resultats obtenus. Les echantillons en acier inoxydable, type NS 22S, sont contamines dans une solution active de produits de fission. L'appareillage utilise pour le traitement des plaquettes consiste en un ballon (250 cm3) surmonte d'un refrigerant et muni d'un chauffage reglable ainsi que d'un systeme d'agitation. Les mesures d'activite des plaquettes, avant et apres traitement, sont effectuees au moyen d'un compteur cloche. Les facteurs etudies par reactif sont: le temps, la concentration du reactif, la temperature du bain. Sous l'angle de la productivite, les resultats les plus interessants sont obtenus a des temperatures de l'ordre de 80 a 100 deg. C pour des concentrations du reactif relativement basses (1 a 2N). L'activite residuelle est presque toujours due au zirconium 95, meme pour des facteurs de decontamination atteignant 95 p. 100. (auteurs)

Files

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Additional details

Additional titles

Original title (French)
Essais de decontamination sur plaquettes en acier inoxydable NS 22S soudees sous argon

Identifiers

URL
http://www.iaea.org/inis/Contacts/;

Publishing Information

Imprint Pagination
79 p.
Report number
CEA-N--0408

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
46012637
Subject category
S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; S61: RADIATION PROTECTION AND DOSIMETRY;
Descriptors DEI
ARGON; CONCENTRATION RATIO; DECONTAMINATION; EFFICIENCY; FISSION PRODUCTS; LABORATORY EQUIPMENT; PLATES; RADIOACTIVITY; REMEDIAL ACTION; SLABS; STAINLESS STEELS; SURFACE CONTAMINATION; SURFACE CONTAMINATION MONITORS; TEMPERATURE DEPENDENCE; TIME DEPENDENCE; WELDED JOINTS; ZIRCONIUM 95
Descriptors DEC
ALLOYS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CARBON ADDITIONS; CLEANING; CONTAMINATION; DAYS LIVING RADIOISOTOPES; DIMENSIONLESS NUMBERS; ELEMENTS; EQUIPMENT; EVEN-ODD NUCLEI; FLUIDS; GASES; HIGH ALLOY STEELS; INTERMEDIATE MASS NUCLEI; IRON ALLOYS; IRON BASE ALLOYS; ISOTOPES; JOINTS; MATERIALS; MEASURING INSTRUMENTS; MONITORS; NONMETALS; NUCLEI; RADIATION MONITORS; RADIOACTIVE MATERIALS; RADIOISOTOPES; RARE GASES; STEELS; TRANSITION ELEMENT ALLOYS; ZIRCONIUM ISOTOPES

Optional Information

Notes
Available from the INIS Liaison Officer for France, see the 'INIS contacts' section of the INIS website for current contact and E-mail addresses: http://www.iaea.org/inis/Contacts/