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Thursday, August 6, 2020 | History

2 edition of Controlling radiation fields in CANDU reactors using chemical decontamination technologies found in the catalog.

Controlling radiation fields in CANDU reactors using chemical decontamination technologies

Controlling radiation fields in CANDU reactors using chemical decontamination technologies

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  • 29 Currently reading

Published by Reactor Chemistry Branch, Chalk River Laboratories in Chalk River, Ont .
Written in English

    Subjects:
  • CANDU reactors -- Safety measures.,
  • Nuclear facilities -- Safety measures.,
  • Radioactive decontamination.

  • Edition Notes

    Other titlesContrôle des champs de 2 rayonnement dans les réacteurs CANDU en utilisant les techniques de décontamination chimique
    Statementby D.G. Miller ... [et. al.].
    SeriesAECL -- 11852, AECL (Series) -- 11852.
    ContributionsMiller, D.G., Atomic Energy of Canada Limited., Chalk River Laboratories. Reactor Chemistry Branch.
    Classifications
    LC ClassificationsTK9152.2 .C66 1997
    The Physical Object
    Pagination8 p. :
    ID Numbers
    Open LibraryOL19903281M
    ISBN 100660172844

    Definition. Nuclear decommissioning is the administrative and technical process whereby a nuclear facility such as a nuclear power plant (NPP), a research reactor, an isotope production plant, a particle accelerator, or uranium mine is dismantled to the point that it no longer requires measures for radiation progressive demolition of buildings and removal of radioactive material. Nuclear engineering is the branch of engineering concerned with the application of breaking down atomic nuclei or of combining atomic nuclei (), or with the application of other sub-atomic processes based on the principles of nuclear the sub-field of nuclear fission, it particularly includes the design, interaction, and maintenance of systems and components like nuclear reactors.

    System decontamination Rolls-Royce products can help customers reduce background radiation fields from internal contamination of piping and components. We’ve supplied decontamination systems, utilizing dilute acid and base solutions and ion exchange processes, to remove activated products from the inner surfaces of systems and components. Canada has power reactors that are appropriate for the disposition of weapons-grade plutonium. The CANDU reactor, in fact, is the most efficient reactor type for this use since it achieves the highest disposition rate (through on-line fuel-shuffling), its control system can handle the kinetics of MOX fuel, and it requires little modification.

      Currently, he is head of Biological and Chemical Decontamination business area at the Bundeswehr Research Institute for Protective Technologies and NBC Protection in Munster, Germany. Most of his career he has been working for the German Armed Forces in the field of CBRN-protection. From to he worked at dstl, PortonDown, Great s: 6. Dose rate control by cobalt sequestration resin implementation Radiation dose rate distribution evaluation tool 5 Fuel behaviour and crud Guidelines for improved fuel performance BWR crud characterization Mechanism of fuel crud deposition Chemical and physical properties of fuel crud


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Controlling radiation fields in CANDU reactors using chemical decontamination technologies Download PDF EPUB FB2

Get this from a library. Controlling radiation fields in CANDU reactors using chemical decontamination technologies. [Douglass G Miller; Chalk River Nuclear Laboratories.]. Frenkel pair and is a key phenomenon associated with radiation damage in polycrystalline materials.

The damage induced in the material is additive and substantial, considering that in a CANDU reactor the overall neutron flux may be 2x neutrons/m2s and the flux in enriched reactors (light water reactors, breeders etc.) may be several times File Size: 2MB. Controlling Radiation Fields in CANDU Reactors using Chemical Decontamination Technologies D.

Miller, D. Guzonas, R. Speranzini (AECL), R. Laporte (HQ), T. Dereski (OH) Dosimetry Results for AECL Personnel Involved in Maintenance Activities at Off-Shore CANDU Stations R. Khaloo (AECL) 6a: Improving Human Performance - 2. A cost of Million $ is evaluated for SAFSTOR decommissioning alternative of proposed CANDU reactor.

Discover the world's research chemical decontamination. Requirement of radiation and. For book authors; News; About. About us; About our journals; About our archives; About our eBooks; Contact; Home; Water chemistry of nuclear reactor systems 5; Recent developments in radiation control technology.

Chemical factors controlling radiation fields around water reactor coolant circuits G. ComleyCChem, FRIC, and D. FerrettDPhil, MA AEE Winfrith 59 69 Introduction Part I: Variables Affecting Radiation Levels in BWRs and PWRs System Chemistry Effects Corrosion Product Release and Deposition Rates Fuel Surface Deposition and Activation.

Abstract Since chemical decontamination of the Reactor Coolant Systems (RCS) and subsystems has the highest potential to reduce radiation fields in a short term this technology has gained an increasing importance.

The available decontamination process at Siemens, i.e., the CORD processes, will be described. Five chemical decontamination processes have been developed for nuclear reactor applications.

One of these processes is the cerium decontamination process (CDP). This method uses a cerium acid reagent to rapidly decontaminate surfaces, obtaining decontamination factors in excess of in 6 h on pressurized water reactor specimens.

Objectives of decontamination technologies for decommissioning There are three main reasons for considering the use of decontamination techniques. The first reason is the importance of removing contamination from components or systems to reduce dose levels in the installations.

Access to the installations could then be made easier so that it. The safety philosophy of CANDU reactors [1] is based upon the principle of "Defence-in-Depth", which includes redundancy (using at least two components or systems for a given function), diversity (using two physically or functionally different means for a given function), separation (using barriers and/or distance to separate components or systems for a given function), and protection.

Experience of radiation exposure control at nuclear power plants in Taiwan C. Lin and C. Huang NobleChem™ technology for life extension of BWRs - field experiences S. Hettiarachchi, R. L Cowan, R. Law and T. Diaz Benefits, impacts and effects on a commercial nuclear power plant due to noble metal chemical addition.

Radiation damage Process technology Disposal strategy Interim storage • • • • Spent fuel storage Wet pool storage Dry storage • • • • • Away from reactor storage Properties of high level waste Activity • • • • Heat generation Thermal effects Phase separation • • • • •.

• • Crystallization and. Core CRUD release and radiation field build-up 4 Preventive tools to minimize CRUD inventory and Radiation fields during plant design phase Selection of steam generator tubing material Steam generator tube manufacturing Cobalt reduction for radiation field control Stellite replacement materials Chemical decontamination can be used in a number of plant sub-systems and components, in PWR, BWR, and CANDU plants.

Some of those plant systems include Reactor Recirculation (RRS), Reactor Water Cleanup (RWCU), Residual Heat Removal (RHR), Chemical Volume Control System (CVCS), and Primary Heat Transport System (PHTS), to name a few.

The Model 93A01 reactor coolant pump (RCP) of Maanshan Nuclear power Plant Unit 2 re- ceived an exposure rate of R h-1 (averaged over five survey points), and was decontaminated in October using the alkaline permanganate (AP)-CanDecon dilute decontamination process to reduce the radiation dose levels.

These proceedings of the seventh conference address the chemical factors important to the operation of water power reactors with minimum corrosion, operator radiation dose and effluent discharges.

A survey of coolant pH versus radiation fields for Westinghouse PWRs Secondary side boiler chemical cleaning field experience and process. Chemical decontamination is an effective method to reduce occupational radiation exposure during large-scale maintenance tasks such as the overhaul of primary recirculation pumps and shroud.

A chemical decontamination process could be used to separate fission RU is a subset of SEU that is particularly attractive for currently operating and future CANDU reactors. Its use without re-enrichment the effect of plutonium in the absence of U on the reactor dynamics is shown to be acceptable with current reactor control technology.

For reactors, the short-term gamma radiation fields up to 50 years post shutdown are dominated by Co from carbon steels that generally contain 50– ppm of parent cobalt as an uncontrolled impurity. Higher levels of cobalt impurity are normally present in stainless steels, up to ppm (Cross et al., ).

For immediate decommissioning. CANDU Canada Deuterium Uranium Reactor CEPN Centre d'étude sur l'Évaluation de la Protection dans le domaine Nucléaire, Nuclear Protection Evaluation Centre CIPS Crud Induced Power Shift CRPPH Committee on Radiation Protection and Public Health CRUD Chalk River Unidentified Deposits CVCS Chemical and Volume Control System.

You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them.and control engineers on operational plant.

However, it does not exclude designers and regulators, who should also find the content useful. Although this edition continues to discuss PWRs, BWRs and CANDU reactors, modern convergence of technology is recognized by the inclusion of detailed information on RBMK and WWER reactor types.Colloidal corrosion products which are referred to as crud are removed from nuclear reactor coolant streams by suspending zirconium oxide particles in the coolant stream.

The crud will be attracted to the surfaces of the zirconia particles and caused to agglomerate thereon. Such zirconia/crud agglomerates may be readily filtered from the coolant.