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Radiation protection program for declared pregnant workers at Los Alamos National Laboratory.

This article presents an overview of Los Alamos National Laboratory's (LANL) Fetal Radiation Protection Program (FRP) that satisfies the requirements set forth in 10 CFR 835 and LANL's Radiation Protection Program. At LANL, the FRP is one of three components of the larger Reproductive Health Hazards Program, which also includes Occupational Medicine and Industrial Hygiene. Although pregnant employees usually enter the program through Occupational Medicine, coordination with all three groups is achieved. The most important part of the FRP Program is performance of the workplace evaluation at the pregnant worker's workplace. At the meeting between the health physicist and the pregnant employee, the following topics are reviewed: risks to the embryo/fetus of working around sources of ionizing radiation; LANL's requirements and 10 CFR 835 regulations; her dose history; basic methods of radiation protection; and a detailed discussion of the work assignments/locations that enables the health physicist to complete an evaluation of the level of radiological hazards. Interface with her supervisor and the Operational Health Physics health physicist in charge of her work areas is essential in acquiring additional information. All of these data, including the radiation dose history and recommendations for possible work modifications or reassignment, are summarized in the workplace evaluation memo, which becomes part of the pregnant employee's medical file. Using input from LANL's legal staff, the author developed a document titled "Guidance to the Supervisors Regarding Fetal Radiation Protection and Reproductive Health Hazards," which instructs supervisors regarding the requirements and regulations, contact names for workplace evaluations, and, very importantly, how to avoid discriminatory behavior against pregnant employees.

Confidentiality↗

The evolution of the international system of radiological protection: food for thought from the Nuclear Energy Agency Committee on Radiation Protection and Public Health.

From its inception, the Nuclear Energy Agency (NEA), which is part of the broader Organisation for Economic Co-operation and Development, has contributed to the development of international radiological protection norms and standards. This continues today, in the form of studies and workshops to assist radiological protection policy makers, regulators and practitioners to develop concepts and approaches to help the international system of radiological protection, as recommended by the International Commission on Radiological Protection (ICRP), to evolve to better serve societal needs. The NEA's Committee on Radiation Protection and Public Health (CRPPH), in providing this support, has collaborated closely with the ICRP and strongly supports the current ICRP recommendation development process. In particular, active dialogue with a broad range of stakeholders is contributing to the evolution of concepts towards consensus on new ICRP recommendations. The CRPPH, as a body of ICRP recommendation practitioners, feels that the public, workers and the environment are well protected by the current radiological protection system, but agrees that a new consolidation and clarification of ICRP recommendations would be of value. The intent of the CRPPH in collaborating with ICRP is to develop a system of radiological protection that is simplified, more coherent, firmly based upon science and more clearly presented than the current system. This paper summarises the more detailed views of the CRPPH on the evolution of the system of radiological protection.

Global Health↗

Pediatric radiation protection.

OBJECTIVES: After completing this article, readers should be able to: Discuss the importance of pediatric radiation protection. List several means for reducing pediatric radiation exposure. Discuss pediatric immobilization and sedation. List and describe equipment used in pediatric radiology. Enumerate several ways to balance quality control and dose reduction. Address the radiation protection of others during pediatric radiology.

Child↗

Truth or consequence--Bo Lindell's contribution to radiation protection.

Bo Lindell, former chairman and emeritus member of ICRP, former chairman of UNSCEAR, former Director General and emeritus worker of the Swedish RAdiation Protection Institute, is a phenomenon. His profound influence on radiation protection, and indeed on environmental protection and risk research in general, includes a profuse flow of scientific publications on all aspects of protection of man against harmful effects of radiation. In this context, perhaps his most important efforts hitherto are those relating to nuclear power. The concept of dose commitment, invented by Bo Lindell, is used worldwide to regulate emissions of radioactive substances, taking into account not only the often trivial dose to immediate bystanders, but the global effect over long time-frames. In the long run, his continuing personal influence on radiation protection as a branch of science and a kind of role model for other types of environmental protection may attain an even greater importance.

Health Physics↗

Radiation protection for radiologic technologists.

This article provides a review and update on radiation protection principles. Major topics include the effects of radiation on the body, natural and artificial sources of radiation, the basic principles of radiation protection and recommended dose limits.

Humans↗

Radiation protection design philosophy for a door interlock system for shared room remote afterloading brachytherapy.

A single remote afterloading system can sometimes be used for the radiation treatment of two or more patients in separate rooms simultaneously. This configuration poses certain radiation protection problems, especially in a busy clinic where some of the treatment rooms have to be used for other non-radiation related patients even though not all radiation treatments have been completed. In this report we describe a door interlock system that has been designed to allow for radiation protection purposes during radiation treatment but is disabled when the radiation treatment is completed--with enough safeguard built in to prevent accidental bypass of the interlock. In addition, the quality control procedures of the radiation monitor devices for these treatment rooms are described. These radiation protection procedures could be generalized to other remote afterloading systems.

Brachytherapy↗

Radiation hormesis in relation to radiation protection.

A radiation-induced adaptive response has been convincingly demonstrated in a variety of cultured cells. It is associated with the activation of genes and the up-regulation of protein enzymes, resulting in a delay in cell-cycling and the opportunity to repair radiation-damaged DNA as a transient phenomenon. Just how the adaptive response operates in a multi-cellular organism is still obscure, but there is little or no evidence in rodents and the beagle dog of a shortening of lifespan after exposure to acute doses up to a few hundreds of mGy or after chronic daily exposure resulting in accumulated doses of up to a few Gy. Nevertheless there is an increase in both non-neoplastic and neoplastic diseases which need not be life-threatening. A prudent approach has been used by the ICRP in deriving a value for radiation-induced detriment at low doses from which to recommend individual dose and risk limits in their system of radiological protection. This is not to deny the possible existence of an adaptive response. However, in the opinion of the author, there is no overwhelming evidence to date which justifies the belief that exposure to low doses in the range of natural background up to a few tens of mSv reduces the incidence of radiation-induced cancer in a population composed of persons of all ages with a wide spectrum of diseases and with widely different sensitivities to radiation.

Adaptation, Physiological↗

[Optimization of radiation protection in the agrosphere: methods of optimization and computer systems for decision support with respect to management of protective measures].

Principles and methods of radiation protection optimisation for countermeasure implementation on areas subjected to radioactive contamination are discussed. Methodological aspects of the protective measures analysis in agrosphere are presented. Methods of estimation of intervention levels, examples of assessment and comparison of countermeasure effectiveness with the use of various criteria are considered. The brief review of up-to-date decision support systems is submitted along with the description of computer system PRANA DSS for estimation of the consequences and countermeasures management in agrosphere in the long-term period of liquidating the consequences of a nuclear accident.

Agriculture↗

Stakeholder perspectives on radiation protection.

Standards for permissible exposure to radiation and the way they are established must incorporate a set of principles that uphold both health and democracy. When the science is uncertain, the burden of proof that risk is not being imposed should be on the source of the risk, not on the possibly affected public or workforce. Scientific processes must be transparent to the public, must address all relevant risk issues and endpoints (and not only cancer), and must be inclusive of the actual experience and opinion of the people who are exposed to radiation risks. Scientists are too often dismissive of public experience and interests, as for instance with worker illnesses or fallout, even though input from the public and workers has frequently proven to be valuable in the development of radiation protection principles. Incorporating the concerns, views, and experiences of workers and the public in a respectful way while maintaining a high standard of scientific work must be an essential part of the standard-setting process. Further, the clearly enunciated International Commission on Radiological Protection principle that the imposition of risk must be accompanied by a clear benefit needs to be a far more explicit part of standard-setting processes, which must also ensure that all known risks are disclosed and that suspected risks, such as possible synergisms between some radionuclides and hormone-disrupting chemicals, are carefully considered. Finally, given the long-lived nature of risks from many radionuclides and the large uncertainties about future physical, social, economic, and other conditions, the issue of how the interests of future generations can be included in standard setting is a difficult but vital matter.

Community Participation↗

Radiation protection and shielding design--strengthening the link.

The improvement in quality and flexibility of shielding methods and data has been progressive and beneficial in opening up new opportunities for optimising radiation protection in design. The paper describes how these opportunities can best be seized by taking a holistic view of radiation protection, with shielding design being an important component part. This view is best achieved by enhancing the role of 'shielding assessors' so that they truly become 'radiation protection designers'. The increase in speed and efficiency of shielding calculations has been enormous over the past decades. This has raised the issue of how the assessor's time now can be best utilised; pursuing ever greater precision and accuracy in shielding/dose assessments, or improving the contribution that shielding assessment makes to radiological protection and cost-effective design. It is argued in this paper that the latter option is of great importance and will give considerable benefits. Shielding design needs to form part of a larger radiation protection perspective based on a deep understanding/appreciation of the opportunities and constraints of operators and designers, enabling minimal design iterations, cost optimisation of alternative designs (with a 'lifetime' perspective) and improved realisation of design intent in operations. The future of shielding design development is argued to be not in improving the 'toolkit', but in enhanced understanding of the 'product' and the 'process' for achieving it. The holistic processes being developed in BNFL to realise these benefits are described in the paper and will be illustrated by case studies.

Equipment Design↗

A review of radiation protection facilities at the University College Hospital, Ibadan, Nigeria.

Ionizing-radiation causes health hazards to human beings if exposed to it. Observation of measures allows continued applications of radiation for whatever purpose throughout the world. There are many departments in the University College Hospital that make use of ionizing radiation in some of their services to patients. Radiation protection facilities in the departments were looked into using carefully designed questionnaires. Inadequacies in radiation protection measures were discovered and suggestions for improvements were proffered.

Hospitals, University↗