0

Full Content is available to subscribers

Subscribe/Learn More  >

Dismantling/Remediation of a Highly Contaminated Sump in Running Plant Conditions

[+] Author Affiliations
Jos Boussu, Koen Lenie, Reginald Coomans

Tecnubel, Dessel, Belgium

Paper No. ICEM2011-59053, pp. 259-265; 7 pages
doi:10.1115/ICEM2011-59053
From:
  • ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management
  • ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management, Parts A and B
  • Reims, France, September 25–29, 2011
  • Conference Sponsors: Nuclear Engineering Division and Environmental Engineering Division
  • ISBN: 978-0-7918-5498-3
  • Copyright © 2011 by ASME

abstract

A sump in the RPE circuit in the EDF - Nuclear Power Plant of Cruas-Meysse, showed an extremely high radiation dose rate since 2007. Different attempts to decontaminate the sump did not have the desired effect. The sump is a so-called “gatte” where two flows of different fluida circulates. A chemical flow transverses the sump within stainless steel piping, the second flow which is (contaminated) residual water, flows through this sump in contact with the sumps walls. The dose rate was estimated at 20 Sv/h, and it was presumed being a single hotspot in the dead zone of the sump, where no chemicals from the chemical decontamination attempts and no high pressure water contact had been possible, or had any effect. To protect the maintenance and exploitation people from the radiation, the sump had been protected with a physical protection system, named a sarcophagus. The client asked to leave this protection system, which was modular, on place during the dismantling works to assure its radiation protection function. The paper describes the remote controlled dismantling of the sump within the particular running conditions of the power plant, the developments made to the equipment, and the conditions in which the works had to be carried out. Some lessons learnt and particular points of attention are revealed to complete this paper.

Copyright © 2011 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In