Dose Equivalent Survey Meters

Cosack, M.; Lesiecki, H.

doi:10.1093/oxfordjournals.rpd.a079415

Cited by 9 publications

(5 citation statements)

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“…They have the necessary sensitivity and, with the exception of an overresponse to intermediate energy neutrons (Cosack and Lesiecki 1985), adequate accuracy. However, because of the moderator, they are quite heavy and bulky, which places some limitation on their use in practical monitoring situations.…”

Section: Neutron and / 3 Dosimetrymentioning

confidence: 99%

The Next Decade in External Dosimetry

Griffith¹

1988

Health Physics

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In recent years, a number of external dosimetry problems have been solved. However, changes in standards and legal concepts relating to the application of dosimetry results will require further enhancements in measurement techniques and philosophy in the next 10 y. The introduction of effective dose equivalent and the legal use of probability of causation will require that much greater attention be given to determination of weighted organ dose from external exposure. An imminent change--an increase in the fast neutron quality factor--will require a new round of technology development in a field that has just received a decade of close scrutiny. For the future, we must take advantage of developments in microelectronics. The use of random access memory (RAM) and metal-on-silicon (MOS) devices as detector elements, particularly for neutron dosimetry, has exciting possibilities that are just beginning to be explored. Advances in microcircuitry are leading, and will continue to lead, in the development of a new generation of small, rugged and "smart" radiation survey instruments that will make the most of detector data. It has become possible with very compact instruments to obtain energy spectra, linear-energy-transfer (LET) spectra, and quality factors in addition to the usual integrated dosimetric quantities: exposure, absorbed dose, and dose equivalent. These instruments will be reliable and easy to use. The user will be able to select the level of sophistication that is required for any specific application. Moreover, since the processing algorithms can be changed, changes in conversion factors can be accommodated with relative ease. During the next decade, the use of computers will continue to grow in value to the health physicist. Personal computers and codes designed for dosimetry applications will become prominent, providing the health physicist with the ability to perform sophisticated data reduction, spectra unfolding and even radiation modeling and transport calculations on the desk top. In the far term, the use of computers could extend to the development of sophisticated tracking systems that would follow and record the workers' movements throughout a radiation area. These data, together with information from area monitors, air samplers and personnel dosimeters, could be used to develop truly integrated dose estimates, including reconstruction of organ doses.

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Section: Neutron and / 3 Dosimetrymentioning

confidence: 99%

The Next Decade in External Dosimetry

Griffith¹

1988

Health Physics

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“…As an example, in neutron monitoring it has never been possible to construct a dosemeter which has the required energy dependence between thermal and fast neutron energies covering the range of nine orders of magnitude. Even for rather complicated survey instruments deviations as high as a factor of 2 or 3 between the right and the left-hand side of equation ( 9), in certain ranges of energies and directions, have been observed (Cosack and Lesiecki 1981). In the case of detectors suitable for individual dosimetry, these deviations are still greater (Griffith et ai 1979).…”

Section: Fitting Procedures and Determination Of The Dose Calibration...mentioning

confidence: 99%

A theoretical concept for measuring doses from external radiation sources in radiation protection

Siebert¹,

Hollnagel²,

Jahr³

1983

Phys. Med. Biol.

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A physically consistent concept is presented for monitoring individual exposures from external radiation, giving quantitative relations between 'fitted' dosemeters satisfying this relation, and 'non-fitted' dosemeters which do not. The calibration of both types is discussed in detail. For non-fitted dosemeters, procedures to determine the error limits are given. The application to accident dosimetry is briefly discussed.

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“…To prevent the risk of exposure to ionizing radiation, survey meters and dosimeters have been manufactured accordingly [6,7]. These detection systems are used at a discrete time, take a relatively long time to provide a good result, and are more expensive.…”

Section: Introductionmentioning

confidence: 99%

Real-time environmental radiation monitoring based on locally developed low-cost device and unmanned aerial vehicle

Folifack Signing,

Mbarndouka Taamté,

Kountchou Noube

et al. 2023

J. Inst.

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In this study, a low-cost local device based on an Unmanned Aerial Vehicle (UAV) for real-time environmental radiation monitoring is proposed. The device consists of a Geiger-Müller ZP 1200 counter for gamma radiation detection and an appropriate electronic circuit for processing and shaping the detected pulses. The Geiger-Müller detector used is low-cost, insensitive to environmental temperature variations, and can be operated continuously over a long period. Two different methods were performed to calibrate the designed device, namely the use of a programmable nuclear pulse generator for electronic calibration and a Cs-137 gamma-ray calibration source. A long flight time UAV is developed locally with suitable characteristics and adapted to carry the radiation detection device. The designed UAV mainly consists of a multi-flight controller having an intelligent switching system associated with a GPS Module for accurate position-keeping and four heavy lift motors. The use of UAVs has the advantage that it allows measurements to be taken over large areas, even those that are difficult to access, and avoids exposing people to radiation. The flight measurement tests were carried out in the urban area of Yaoundé-Cameroon, at an altitude of 15 to 100 meters with a sweeping speed of about 20 km/h for 36 days from January 01, 2023, to February 06, 2023. The tests showed that the concentrations collected varied between 0.00697 μSv/h and 0.8706 μSv/h, of which 85.71% of data have a concentration below the threshold (0.3 μSv/h) and 14.29% above this threshold. These tests confirm that the developed radiation detection system works properly and is suitable for environmental radiation protection and nuclear safety activities.

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Dose Equivalent Survey Meters

Cited by 9 publications

References 0 publications

The Next Decade in External Dosimetry

The Next Decade in External Dosimetry

A theoretical concept for measuring doses from external radiation sources in radiation protection

Real-time environmental radiation monitoring based on locally developed low-cost device and unmanned aerial vehicle

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