Introduction to reduce radiation exposure
The radiation dose limits indicate the maximum occupational dose (OD) allowed for radiation workers in a year. One should make considerable efforts to adopt strict protective measures for working with radiations in order to reduce the radiation exposure to as low as reasonably achievable ( ALARA). To minimize the radiation exposure must be critically evaluated and adopted concept, techniques, equipment and procedures. Action level 1 is when a radiation worker receives > 5 mSv per quarter ( 10 % of OD per year) and Action level 2 is when a radiation worker receives > 15 mSv ( 30% of OD per year ). If these limits are exceeded, corrective actions must be taken by the RSO or higher limit must be justified by the particular situation. Let us see the action to be taken to reduce radiation exposure
Remedial action to reduce radiation exposure
Natural background is excluded from the above limits and the circumstances in which natural background itself or more especially, natural radiation sources enhanced locally by man's operations for selected purposes, can give rise to annual exposures above the level of 1mSv.
Remedial action levels involve a balance of risk and many other socio-economic factors. In general, the aim of setting a remedial action level is to reduce the greatest risks from a given type of radiation sources. It is clear that once a remedial action level is established for given circumtances, action is recommended when a level above it is found. Actions to reduce exposure should not be limited by or to the remedial action. Several criteria relevant to the low level risk or triviality of risk were considered in which perspective that tend to minimize subjective aspects of judgement. Smallness of risk was considered in relation to :
magnitude of dose,
difficulty in detection and measurement of dose and health effects,
natural risk for the same health effects,
perception of and behavioral response to risk levels.
estimated risk for the mean and variance of natural background radiation exposure levels.
An annual limit of 1 mSv effective dose for continuous exposure and an annual limit of 5 mSv effective dose for infrequent exposure.
Remedial action levels for the public of 5 mSv annual average effective dose for exposure from natural sources excluding radon and an annual average of 7 x 10 ^ -3 Jh m^ -3 for total exposure to radon and its decay products.
Another important change is the introduction of the radiation weighing factor which range from 1 for all photon energies up to 20 for 1 MeV neutrons and alpha particles. Thus these are the measures taken to reduce radiation exposure
The radiation dose limits indicate the maximum occupational dose (OD) allowed for radiation workers in a year. One should make considerable efforts to adopt strict protective measures for working with radiations in order to reduce the radiation exposure to as low as reasonably achievable ( ALARA). To minimize the radiation exposure must be critically evaluated and adopted concept, techniques, equipment and procedures. Action level 1 is when a radiation worker receives > 5 mSv per quarter ( 10 % of OD per year) and Action level 2 is when a radiation worker receives > 15 mSv ( 30% of OD per year ). If these limits are exceeded, corrective actions must be taken by the RSO or higher limit must be justified by the particular situation. Let us see the action to be taken to reduce radiation exposure
Remedial action to reduce radiation exposure
Natural background is excluded from the above limits and the circumstances in which natural background itself or more especially, natural radiation sources enhanced locally by man's operations for selected purposes, can give rise to annual exposures above the level of 1mSv.
Remedial action levels involve a balance of risk and many other socio-economic factors. In general, the aim of setting a remedial action level is to reduce the greatest risks from a given type of radiation sources. It is clear that once a remedial action level is established for given circumtances, action is recommended when a level above it is found. Actions to reduce exposure should not be limited by or to the remedial action. Several criteria relevant to the low level risk or triviality of risk were considered in which perspective that tend to minimize subjective aspects of judgement. Smallness of risk was considered in relation to :
magnitude of dose,
difficulty in detection and measurement of dose and health effects,
natural risk for the same health effects,
perception of and behavioral response to risk levels.
estimated risk for the mean and variance of natural background radiation exposure levels.
An annual limit of 1 mSv effective dose for continuous exposure and an annual limit of 5 mSv effective dose for infrequent exposure.
Remedial action levels for the public of 5 mSv annual average effective dose for exposure from natural sources excluding radon and an annual average of 7 x 10 ^ -3 Jh m^ -3 for total exposure to radon and its decay products.
Another important change is the introduction of the radiation weighing factor which range from 1 for all photon energies up to 20 for 1 MeV neutrons and alpha particles. Thus these are the measures taken to reduce radiation exposure
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