Allied Health Services

An Introduction to Radiation Protection by Alan Martin, Sam Harbison, Karen Beach, Peter Cole

By Alan Martin, Sam Harbison, Karen Beach, Peter Cole

An advent to Radiation Protection is a hugely readable account of the character of the risks awarded through ionizing radiation and the equipment of safety for these new to the sector and for the non-specialist.

The 6th variation of this tested textual content takes readers throughout the basic heritage of the topic, the technical ideas underlying the keep watch over of radiation risks, radiation detection and size, and the organic results of radiation. those rules are via a attention of radiation safeguard concerns within the nuclear undefined, the non-nuclear area, and the scientific box. additional specialized subject matters comprise probability evaluate, waste administration and decommissioning, radiological incidents and emergencies, correct laws, and organizational issues.

Supplemented by way of transparent diagrams and pictures, precis sections, and revision questions, the publication is acceptable for the newbie in addition to the extra complicated radiation practitioner. It is still an excellent primer for these operating within the nuclear undefined, nuclear drugs technicians, radiographers and scientific physics technicians, overall healthiness and protection executives and occupational health and wellbeing pros. it's also a useful spouse for a person education or project a direction in radiation protection.

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Extra resources for An Introduction to Radiation Protection

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The processes leading to radiation damage are complex and are often considered in four stages: (i) The initial physical stage, lasting only a minute fraction ("' 10- 16 ) of a second in which energy is deposited in the cell and causes ionization. In water the process may be written as: where H 2 0+ is the positive ion and e- the negative ion. (ii) The physico-chemical stage, lasting about 10- 6 seconds in which the ions interact with other water molecules resulting in a number of new products. For example, the positive ion dissociates: 42 An Introduction to Radiation Protection the negative ion, that is the electron, attaches to a neutral water molecule which then dissociates: H20 + e- H 2 0- ----+ ----+ H H 20 + OH- Thus the products of the reactions are H+, OH-, H and OH.

The blood, after passing through the tissues, returns to the right side of the heart via the veins. The blood is then pumped to the lungs where it becomes oxygenated before returning to the left side of the heart again. The blood in the arteries contains a lot of oxygen and is bright red in colour while the blood returning from the tissues contains very little oxygen and is dark red in colour. The body contains about 5litres of blood which circulates on the average once a minute. There are three types of blood cells, each performing an essential function: the red cells (erythrocytes), white cells (granulocytes+ lymphocytes) and platelets (thrombocytes).

Summary of values of Q Type of radiation Q X-rays, y -rays and electrons Thermal neutrons Fast neutrons and protons a-particles 2· 3 10 20 neutron dose (Nr) of 0·001 Gy (0·1 rad). What is his total dose equivalent? 6 Submultiples In terms of occupational radiation exposure the gray and the sievert are very large units. It is often convenient to have smaller units and this is done by using the prefixes milli (one thousandth) abbreviated tom, and micro (one millionth) abbreviated to fl. Thus I Gy = 1000 mGy == I 000 000 11Gy I Sv = 1000 mSv = I 000 000 JlSv In terms of the old units 1 Gy 100 rad I mGy = 100 mrad 1 11Gy = 0· I mrad and Example.

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