Survey meters

FIGURE 6.8 Ludlum Model 3 survey meter with Model 44-9 pancake Geiger-Mueller... 

Radiation Saturation A phenomenon in which a survey meter s capability to measure radiation levels is overwhelmed, causing the meter to incorrectly read zero . 

Roentgen (R) The unit of radiation exposure in the air units for quantities of X-ray or gamma radiation measured by detection and survey meters. Named after Wilhelm Roentgen, German scientist who discovered X-rays in 1895. 

The laboratory should be equipped with a portable G-M survey meter in order to check spills or possible self-contamination. 

Gauge thickness of various thin materials Measurement of dust and pollutant levels 90Sr Survey meters... 

Health Physics Laboratory. The health physics laboratory is located at the entrance to the radiation sources controlled area (Figure 2). From this laboratory the access to the radiation sources area is monitored and controlled. The health physics laboratory is equipped with portable beta, gamma, and neutron survey meters of various designs and ranges to facilitate the area monitoring, air monitors for airborne contamination, and anticontamination equipment. It is equipped with monitors and alarms for the area radiation detectors, pool water level indicators, and access doors. It also has ready access to the counting equipment of the radiochemistry laboratory. 

R = exposure rate reading of survey meter held at a distance of 1 foot from sample, in mR/h... 

Geiger counters are often called survey meters in industry. 

When lead bricks or concrete blocks are used as shielding materials, shielding must be done as near radiation sources as possible and the shielding effect must be confirmed with a survey meter. Care must be taken in regard to leaking and scattering rays through clearances between piled bricks and blocks. A lead container is usually used to carry radioactive materials. 

The governmental inspection of imported foods was taken by food sanitation inspectors at seaports and airports in Japan by a first screening test with a simple scintillation survey meter and also by a minute analysis of Ge detector at four major sea ports (Tokyo, Yokohama, Osaka, Kobe), one major airport (Narita) and in the National Institute of Hygienic Sciences, Tokyo. At the same time, trade companies were requested voluntarily to check imported foods for radioactive contamination under the above Japanese interim standard of 370 Bq/kg at the laboratories designated by the Ministry of Health and Welfare of Japan (Washima and Ohkubo, 1987). 

Neutron radiation survey meter. General neutron survey. 

Radiation survey meter with telescopic extension. General radiation survey. 

High sensitivity underwater radiation survey meter covering the range from 0.1 mr/hour to 30000 rad.hour. Spent fuel measurements. Also for unattended monitoring (if coupled to computer). 

Because it cannot count at high rates without losses, the Geiger counter is now obsolete in diffractometry. It is still used in some radiation survey meters. 

All necessary accessories for PET studies, including a dose calibrator, 18F-FDG storage, a wipe test counter, a survey meter, and so on, are kept in the van. The mobile PET van moves daily to different clients sites according to the schedule made prior to the day of examination. The patient s PET study is performed and the data are processed in the van, while the interpretation can be made either at the van or at the home site of the mobile PET company. 

To meet ERDA (formerly AEC) license requirements, the activity of each sample received was monitored with a radiation survey meter, and the personnel involved were supplied with radiation dosimeters. An excellent discussion of radiation safety and licensing requirements in handling reactor-activated petroleum products is available (49). 

Cutie-pie survey meter Ionization chamber (air) y. X-ray, high-energy 5-10,0(X) mrad/h Dose-rate meter for y and X-rays (0.008-2 MeV within 10 percent)... 

Geiger counters are commonly called survey meters. 

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