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13 Cards in this Set
- Front
- Back
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Define radiation |
The disintegration of the atoms of a substance. During this process energy is emitted in the form of particles or electromagnetic waves this energy so known as ionizing radiation |
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Radiation materials are suspected to be involved if: |
Prior knowledge that radioactive materials are in building Radioactivity placard on vehicle or package Cellar may state radioactive materials present Electronic diameter alarm actuated Surgery meter shoes a dose rate above background Terrorist acts |
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What are the 2 aspects of how radiation is received |
Absorbed dose is the measure if how much has been absorbed Dose rate specifies how fast a dose is being absorbed and measured as the amount absorbed in 1 hour |
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Background level or radiation in London |
0.2usv/hr |
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Ionizing radiation limits employees to how much radiation a year |
20msv per year per person Additional dose of 13msv |
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In exceptional circumstances the fire constraint can be exceeded. The HMEPO must be satisfied an intervention is justified in order to: |
Save life or rescue endangered people Prevent people being exposed to radiation Save valuable installations when appropriate |
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Any incidents involving ionizing radiation there are 2 types of hazard to be controlled: |
External hazard: where the body may be affected by radiation from the outside penetrating the body Internal hazard: Where an area is contaminated by a radioactive substance and there is a risk it could be inhaled, digested or absorbed. |
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Different types of radiation |
Alpha Beta Gamma X-ray |
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Radioactive materials can be classed into 2 categories |
Sealed no contamination hazard, provided contaminant is not damaged Unsealed/ OPEN Will involve a contamination hazard. Unsealed contaminants may be found as solids and powders liquids or gas |
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Server meters are allocated to |
All pump ladders and pumps All fire and rescue units |
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The radiation contaminants meter is used for what 3 things |
Measure surface radioactive contamination Facilitate the decontamination role by allowing the monitoring of radioactive contamination Monitor the boundary of the restricted area |
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Electra radiation contamination meter functions |
To detect or verify the presence of radio active contamination so that correct decontamination procedures can be carried out To prevent any contamination or contaminant being brought out of the hazard zone |
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What reading does the initial dose rate alarm on an EPD actuate and what would the alarm sound like? |
100 usv/h Intermittent double fast tone every 20 seconds |
