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Decontamination of material in the Marcoule plutonium producing centre (1961); La decontamination du materiel dans le centre de production du plutonium de Marcoule (1961)

Abstract

The decontamination of material in an atomic centre is an essential operation in view of the cost and the difficulties of replacement. It also makes it possible to reduce the storage of radio-active materials always an expensive task. Surfaces are contaminated by retention of radioactive products and the mechanism of the bounding forces can be explained in terms of chemical, mechanical, electrostatic and surface tension phenomena. The methods used for decontamination are either physical (section, abrasion, steam, ultrasonics) or chemical (acids, alkalis, detergents, reducing and oxidising agents). At Marcoule, chemical methods of treatment are used. This is effected in tanks, the exact composition of the liquids being regulated from a control panel. Working experience has shown that the fact of operating in humid conditions eliminates all problems of atmospheric contamination; as a result it is possible for the personnel to work without any special protective devices. Almost all the material can be re-utilized and the operations produce only a small volume of liquid waste. The decontamination workshop is operated by a small number of workers. The working costs, including capital repayment and treatment of the waste, do not exceed 15 per cent of the value of the apparatus treated. (authors)  More>>
Authors:
Rodier, J; Bouzigues, H; Boutot, P [1] 
  1. Commissariat a l'Energie Atomique, Centre de Production de Plutonium, Marcoule (France). Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1961
Product Type:
Technical Report
Report Number:
CEA-R-2031
Resource Relation:
Other Information: 5 refs
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; CEA MARCOULE; DECONTAMINATION; EQUIPMENT; PILOT PLANTS; RADIOACTIVE MATERIALS; SURFACE CLEANING; SURFACE CONTAMINATION
OSTI ID:
20822451
Research Organizations:
CEA Marcoule, 30 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR06R2031121460
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
12 pages
Announcement Date:
Dec 30, 2006

Citation Formats

Rodier, J, Bouzigues, H, and Boutot, P. Decontamination of material in the Marcoule plutonium producing centre (1961); La decontamination du materiel dans le centre de production du plutonium de Marcoule (1961). France: N. p., 1961. Web.
Rodier, J, Bouzigues, H, & Boutot, P. Decontamination of material in the Marcoule plutonium producing centre (1961); La decontamination du materiel dans le centre de production du plutonium de Marcoule (1961). France.
Rodier, J, Bouzigues, H, and Boutot, P. 1961. "Decontamination of material in the Marcoule plutonium producing centre (1961); La decontamination du materiel dans le centre de production du plutonium de Marcoule (1961)." France.
@misc{etde_20822451,
title = {Decontamination of material in the Marcoule plutonium producing centre (1961); La decontamination du materiel dans le centre de production du plutonium de Marcoule (1961)}
author = {Rodier, J, Bouzigues, H, and Boutot, P}
abstractNote = {The decontamination of material in an atomic centre is an essential operation in view of the cost and the difficulties of replacement. It also makes it possible to reduce the storage of radio-active materials always an expensive task. Surfaces are contaminated by retention of radioactive products and the mechanism of the bounding forces can be explained in terms of chemical, mechanical, electrostatic and surface tension phenomena. The methods used for decontamination are either physical (section, abrasion, steam, ultrasonics) or chemical (acids, alkalis, detergents, reducing and oxidising agents). At Marcoule, chemical methods of treatment are used. This is effected in tanks, the exact composition of the liquids being regulated from a control panel. Working experience has shown that the fact of operating in humid conditions eliminates all problems of atmospheric contamination; as a result it is possible for the personnel to work without any special protective devices. Almost all the material can be re-utilized and the operations produce only a small volume of liquid waste. The decontamination workshop is operated by a small number of workers. The working costs, including capital repayment and treatment of the waste, do not exceed 15 per cent of the value of the apparatus treated. (authors) [French] La decontamination du materiel dans un centre atomique est une operation indispensable etant donne le cout et les difficultes du remplacement. Elle contribue aussi a diminuer les stockages toujours onereux des materiaux radioactifs. Les surfaces se contaminent par retention de corps radioactifs, l'origine des forces de liaison devant etre recherchee dans les phenomenes chimiques, mecaniques, electro-statiques ou de tensions superficielles. Les methodes de decontamination peuvent etre physiques (aspiration, abrasion, vapeur, ultra-sons) ou chimiques (acides, alcalins, detergents, reducteurs, oxydants). Sur le centre de Marcoule, la methode des traitements chimiques a ete adoptee. Le travail s'effectue en cuves, le dosage precis des bains etant realise a partir d'un pupitre de commande. L'experience de fonctionnement a montre qu'en raison du travail en milieu humide les problemes de contamination atmospherique ne se posent pas: de ce fait, les agents peuvent travailler sans dispositifs de protection speciaux. Pratiquement tout materiel peut etre recupere et les operations n'entrainent qu'un assez faible volume d'effluents. Le fonctionnement de l'atelier est assure par un petit nombre d'agents. Les frais d'exploitation, y compris amortissement et traitement des effluents, ne depassent pas 15 pour cent de la valeur marchande des pieces traitees. (auteurs)}
place = {France}
year = {1961}
month = {Jul}
}