U.K. National Radiological Protection Board radon calibration procedures

U.K. National Radiological Protection Board Radon Calibration Procedures

A procedure for the calibration of instruments for the detection of 222Rn in air is described. The method is based on the alpha-spectrometric determination of the concentration in air of 218Po in the calibration chamber. The calibration chamber is described, together with the method of maintaining a high aerosol concentration. The 218Po concentration at steady state in the chamber is found to b...

Radiological protection of patients

ICARE Radon Calibration Device

An aerodynamic calibration device called ICARE is briefly described. ICARE is currently being used at the Nuclear Research Center of Saclay in France for the certification of instruments employed in measurement of artificial radioactive particulate airborne contamination. ICARE is essentially a blower. Aerosols calibrated in size and labelled with 137Cs or 239Pu are injected in the mainstream o...

Quality management in the NHS: the doctor's role--II.

of the Natizonal Radilological 43 National Radiological Protection Board. Board statement on radon in homes. Protection Board, 1991. Documents of the National Radiological Protection Board 1990;1(1). 41 International Commission on Radiological Protection. Lung cancer risk from 44 Department of the Environment. 7'he householder's guide to radon. 2nd ed. indoor exposure to radon daughters. ICRP p...

Optimization of Radiological Protection in Pediatric Patients Undergoing Common Conventional Radiological Procedures: Effectiveness of Increasing the Film to Focus Distance (FFD)

Background Increasing the x-ray film to focus distance (FFD), has been recommended as a practical dose optimization tool for patients undergoing conventional radiological procedures. In the previous study, we demonstrated a 32% reduction in absorbed dose is achievable due to increasing the FFD from 100 to 130 cm during pediatric chest radiography. The aim of this study was to examine whether in...