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[en] The effects of a coupling of the Higgs sector of the standard model to a heavy scalar singlet particle are studied in the limit of large Higgs self-coupling. It is found that the singlet does not decouple from the standard model when its mass becomes large. This is due to mixing with the Higgs particle. The leading quantum corrections to the rho-parameter, the 3W vertex and the 4W vertex are calculated and compared to the poles in the corresponding quantum corrections in massive Yang-Mills theory. In the strong coupling limit of the singlet there is no relation between the structure constants of the effective one-loop Lagrangians in both theories. This is the first explicit example of such a breakdown at the one-loop level. An expansion of multiloop integrals in powers of ratios of their masses is presented in an appendix. This formalism is then used to show the general correspondence between poles in dimensional regularization and mass divergences due a Pauli-Villars regulator. Differences with the Higgs mechanism are discussed
[en] The AREVA Control Room Accident Filtration System (CRAFT) is a product that maintains the proper air conditions in the main control room and emergency control facilities by filtering the air and removing noble gases in case of a severe accident in a nuclear power plant (NPP) with increased activity concentration in the plant environment.
[en] Ascó 1, Ascó 2 and Vandellòs 2, as first nuclear power plants in Spain, were equipped with the AREVA Filtered Containment Venting System with enhanced organic iodine retention (FCVS-PLUS). The system is equipped with a Radiation Monitoring System PEGASUS as a Passive Gaseous Effluent Monitoring System. It provides an online measurement of the noble gas releases and can be extended, if required, to collect aerosols and gaseous iodine.
[en] There has been increasing involvement of Ontario Hydro in public participation since the early 1970's, in particular with the formation of Task Force Hydro. A demand for information has resulted and Ontario Hydro has formulated a general policy regarding release of information. Three questions must be addressed: What is public participation. Why do we need it. How can it be accomplished. Public participation is sharing information and alternatives with the public at large. Some factors which make public participation necessary are the intrusion of major facilities into rural areas, urbanization of sourthern Ontario, pollution concern and unwillingness to accept decisions of others affecting lifestyle. In order to accomplish public participation it is recommended that proposed objectives and scope of study, type of facility, location, goals and roles of the public, time-frame and continuity, and resources be identified and considered. Ontario Hydro has adopted several principles toward this goal including encouraging continuous public dialogue, providing the public with opportunity to consider and comment on alternative plans, formation of citizen committees to examine and advise on environmental issues and providing a forum for presentation and discussion of the study at each stage. (J.T.A.)
[en] The Head of Communications at the British Wind Energy Association argues that wind energy has a key role to play as part of the UK's strategy to combat climate change. She points out that wind energy is a proven technology, generating power simply, efficiently and cost-effectively. She advocates a move away from large-scale power generation to community-based schemes and stresses the way in which renewable energy provides sustainability, diversity and security. Examples of community generation schemes and local ownership of wind turbines are given, with particular reference to the Community Renewables Initiative and its local support teams, the help available from the Department of Trade and Industry, the Baywind wind farm and the project at Cassop Primary School in County Durham
[en] An improved method and apparatus for providing an indication of the radiation activity of the radioactive decay products of radium in an environment wherein the alpha particle activity and the beta particle activity at a test site are detected and the detected alpha particle and the beta particle activities provide the indication of the radiation activity of radon and the decay products of radon at the test site. The background radiation activity at the test site is detected, and the detected alpha particle and the beta particle activities less the detected background radiation activity provide the indication of the radiation activity of radon and the decay products of radon. The sum of the detected alpha particle and beta particle activities provides an indication of the working level (WL); the difference between the detected alpha particle and the beta particle activities provides an indication of the radon concentration at the test site and the equivalent ingrowth time of the radon decay products (radon daughters) from the earlier existence of the radon as a gas; and the detected background radiation activity provides an indication of the penetrating radiation hazard at the test site. 40 claims, 8 figures
[en] Efficient hydrogen control prevents any risk of deflagration or deterioration which could challenge the containment or destroy some safety-graded items of equipment such as fan coolers. In addition it allows more possibilities in accident management. Those objectives can now be achieved by implementing PARs (passive autocatalytic recombiners) which are safety-oriented components with no potentially negative influence on the course of an accident. 1 fig., 3 refs
[en] In order to reduce the residual risk associated with hypothetical severe nuclear accidents, nuclear power plants in Germany have been backfitted with supplementary systems such as containment venting systems. In conjunction with these measures the German Reactor Safety Commission (RSK) imposed additional requirements. To meet these requirements new systems and components were developed, qualified and actually ordered for the utilities. The essential components of these systems are presented, with special regard to WWER 440 type reactors. (author). 5 figs