Expansion of nuclear power technology to new countries – SMRs, safety culture issues, and the need for an improved international safety regime

This article reviews the status and prospects of nuclear power around the world and provides a perspective on the need to strengthen national and international safety regimes and bolster nuclear safety culture globally – one prerequisite for a sustained role of the technology in the future. It discusses the prospects in countries that have never deployed nuclear power before but have expressed an interest in adding it to their future national energy mixes. Many of these “newcomer” countries are considering small modular reactor (SMR) designs which hold promise for fitting better into their local electricity systems. Thus, the article considers the technical attributes of these designs and analyzes the advantages and disadvantages of SMRs with an emphasis on economics, grid compatibility and most importantly, safety. Attributes of a safety culture are discussed from social and cultural aspects, including topics of good governance and the presence of an independent national regulatory authority. Beyond the need for strong national safety regulations, the article also highlights the need to strengthen the international regulatory regime, if nuclear power is to succeed in achieving the highest levels of safety globally. Finally, the qualities of such a regime are discussed

Environmental measurements and monitoring programs around reactors: pre- operational, operational, and for accidents

A general overview is given of the requirements for environmental monitoring programs around nuclear power reactors. The emphasis is on radiological measurements in three types of environmental measurement situations: pre-operational; operational; and during accidents and accidental releases. The goals of the various programs are outlined, along with the relevant regulations. Discussions of the sampling part of each program are included, along with some comments on the choice, deployment, and use of instrumentation. Other sources must be consulted for detailed discussions of instruments and analytical techniques. The goal is to give some insight into the complexities of environmental monitoring programs. The difficulties involved in establishing a viable program should not be thought of as insurmountable: on the contrary, many skilled personnel are easily capable of carrying out these aampling and measuring programs, including the occurrence of unexpected demands from time to time. (auth

HUMAN DISEASE FROM RADON EXPOSURES: THE IMPACT OF ENERGY CONSERVATION IN RESIDENTIAL BUILDINGS

The level of radon and its daughters inside conventional buildings is often higher than the ambient background level. Interest in conserving energy is motivating homeowners and builers to reduce ventilation and hence to increase the concentration of indoor generated air contaminants, including radon. It is unliekly that the current radiation levels in conventional homes and buildings from radon daughters could account for a significant portion of the lung cancer rate in non-smokers. However, it is likely that some increased lung cancer risk would result from increased radon exposures; hence, it is prudent not to allow radon concentrations to rise significantly. There are several ways to implement energy conservation measures without increasing risks

An evaluation of the reliability and usefulness of external-initiator PRA (probabilistic risk analysis) methodologies

The discipline of probabilistic risk analysis (PRA) has become so mature in recent years that it is now being used routinely to assist decision-making throughout the nuclear industry. This includes decision-making that affects design, construction, operation, maintenance, and regulation. Unfortunately, not all sub-areas within the larger discipline of PRA are equally mature,'' and therefore the many different types of engineering insights from PRA are not all equally reliable. 93 refs., 4 figs., 1 tab