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the received dose integrated over 50 years from the date of intake. In order to calculate it, one has to know the intake activity and the value of the committed dose equivalent per unit of intake activity. The uncertainties of the first parameter are such that the committed dose equivalent can only be regarded as an order of magnitude and not as a very accurate quantity. The use of it is justified, however, for, like the dose equivalent for external exposure, it expresses the risk of stochastic effects for the individual concerned since these effects, should they appear, would do so only after a latent period which is generally longer than the dose integration time. Moreover, the use of the committed dose equivalent offers certain advantages for dosimetric management, especially when it is simplified. A practical problem which may arise is that the annual dose limit is apparently exceeded by virtue of the fact that one is taking account, in the first year, of doses which will actually be received only in the following years. These problems are rare enough in practice to be dealt with individually in each case.
232:
Three types of cigarettes made in
Morocco of black tobacco show higher annual committed equivalent doses in the extrathoracic and thoracic regions of the respiratory tract than the other studied cigarettes (except one type of cigarettes made in France of yellow tobacco); their corresponding annual committed equivalent dose ratios are larger than 1.8. Measured annual committed equivalent doses ranged from 1.8×10 Sv/yr to in the extrathoracic region and from 1.3×10 Sv/yr to in the thoracic region of the respiratory tract for a smoker consuming 20 cigarettes a day."
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In the case of internal exposure, the dose is not received at the moment of exposure, as happens with external exposure, since the incorporated radionuclide irradiates the various organs and tissues during the time it is present in the body. By definition, the committed dose equivalent corresponds to
196:
Not all radiation is harmful. The radiation can be absorbed through multiple pathways, varying due to the circumstances of the situation. If the radioactive material is necessary, it can be ingested orally via stable isotopes of specific elements. This is only suggested to those that have a lack of
231:
and their decay products, were evaluated inside cigarette smokes of tobacco samples studied. Annual committed equivalent doses due to short-lived radon decay products from the inhalation of various cigarette smokes were determined in the thoracic and extrathoracic regions of the respiratory tract.
102:
effect in a tissue or organ is assumed to be proportional to the equivalent dose in the tissue or organ. The constant of proportionality differs for the various tissues of the body, but in assessing health detriment the total risk is required. This is taken into account using the tissue weighting
90:
This is defined in Title 10, Section 20.1003, of the Code of
Federal Regulations of the USA the CEDE dose (HE,50) as the sum of the products of the committed dose equivalents for each of the body organs or tissues that are irradiated multiplied by the weighting factors
197:
these elements however, because radioactive material can go from healthy to harmful with very small amounts. The most harmful way to absorb radiation is that of ingestion absorption because it is almost impossible to control how much will enter the body.
413:
SCHLENKER R, A. "Comparison of Intake and
Committed Dose Equivalent Permitted by Radiation Protection Systems Based on Annual Dose Equivalent and Committed Dose Equivalent for a Nuclide of Intermediate Effective Half-life." Health Physics, 51.2 (1986):
222:
contents were measured inside various tobacco samples by using a method based on determining detection efficiencies of the CR-39 and LR-115 II solid state nuclear track detectors (SSNTD) for the emitted
426:- "The confusing world of radiation dosimetry" - M.A. Boyd, U.S. Environmental Protection Agency. An account of chronological differences between USA and ICRP dosimetry systems.
107:, which represent the proportion of the stochastic risk resulting from irradiation of the tissue or organ to the total risk when the whole body is irradiated uniformly and H
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Committed
Effective Dose Equivalent (CEDE) refers to the dose resulting from internal radiation exposures. The CEDE is combined with the
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Radon and daughters in cigarette smoke measured with SSNTD and corresponding committed equivalent dose to respiratory tract
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Radon and daughters in cigarette smoke measured with SSNTD and corresponding committed equivalent dose to respiratory tract
54:"The calculation of the committed effective dose equivalent (CEDE) begins with the determination of the equivalent dose, H
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needed by the body, and may be more readily absorbed if the individual has a deficit of that element. For instance,
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The intake of radioactive material can occur through four pathways: inhalation of airborne contaminants such as
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which would release radioactive iodine. Other radioisotopes have an affinity for particular tissues, such as
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into bone, and may be retained there for years in spite of their foreign nature.
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Cigarette smoke measured with SSNTD and corresponding committed equivalent dose
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material by an individual during the 50-year period following the intake".
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372:"Committed dose equivalent in the practice of radiological protection"
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is the radiation weighting factor. The unit of equivalent dose is the
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Committed dose equivalent in the practice of radiological protection
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is the equivalent dose in the tissue or organ, T, in the equation:"
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43:(10 CFR 20.1003), such that "The Committed dose equivalent, CDE (H
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are dose quantities used in the United States system of
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318:"Exposure Pathways | Radiation Protection | US EPA"
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95:) applicable to each of those organs or tissues.
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181:in the event of an accident or attack at a
150:through the skin, and injection of medical
130:Both quantities can be expressed in rem or
27:for irradiation due to an internal source.
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86:Committed effective dose equivalent (CEDE)
400:US nuclear regulatory commission glossary
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793:Wireless electronic devices and health
161:Some artificial radioisotopes such as
120:Total Effective Dose Equivalent (TEDE)
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370:Nenot, J. C.; Piechowski, J. (1985).
39:in Title 10, Section 20.1003, of the
819:List of civilian radiation accidents
788:Wireless device radiation and health
783:Biological dose units and quantities
733:Electromagnetic radiation and health
165:are chemically identical to natural
98:"The probability of occurrence of a
35:CDE is defined by the United States
21:Committed effective dose equivalent
267:Committed effective dose equivalent
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768:Radioactivity in the life sciences
58:, to a tissue or organ, T. Where D
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306:Total effective dose equivalent
31:Committed dose equivalent (CDE)
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37:Nuclear Regulatory Commission
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656:Cosmic background radiation
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62:,R is the absorbed dose in
41:Code of Federal Regulations
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743:Lasers and aviation safety
177:from ingested radioactive
116:Deep-Dose Equivalent (DDE)
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773:Radioactive contamination
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626:Electromagnetic radiation
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340:"Absorption of Radiation"
185:, or the detonation of a
17:Committed dose equivalent
925:Radiation health effects
886:See also the categories
824:1996 Costa Rica accident
485:Acoustic radiation force
125:
798:Radiation heat-transfer
651:Gravitational radiation
25:radiological protection
839:1990 Zaragoza accident
834:1984 Moroccan accident
803:Linear energy transfer
477:Non-ionizing radiation
829:1987 Goiânia accident
631:Synchrotron radiation
621:Earth's energy budget
603:Radioactive materials
598:Particle accelerators
171:potassium iodide (KI)
138:Pathways for Exposure
900:Radiation protection
753:Radiation protection
641:Black-body radiation
548:Background radiation
463:(physics and health)
295:Deep-Dose Equivalent
870:Radiation hardening
812:Radiation incidents
748:Medical radiography
707:Radiation syndrome
661:Cherenkov radiation
247:Radiation poisoning
183:nuclear power plant
865:Radioactive source
686:Radiation exposure
666:Askaryan radiation
646:Particle radiation
530:Ionizing radiation
252:Ionizing radiation
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888:Radiation effects
758:Radiation therapy
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636:Thermal radiation
573:Neutron radiation
538:Radioactive decay
187:nuclear explosive
82:, in SI units)."
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930:Equivalent units
848:Related articles
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588:Nuclear reactors
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896:Radiobiology
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738:Laser safety
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354:. Retrieved
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285:NRC Glossary
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520:Ultraviolet
515:Radio waves
322:www.epa.gov
49:radioactive
914:Categories
701:and health
699:Radiation
568:Cosmic ray
356:2014-10-31
273:References
163:iodine-131
103:factors, W
100:stochastic
855:Half-life
728:Dosimetry
563:Gamma ray
510:Microwave
500:Starlight
461:Radiation
191:plutonium
68:radiation
505:Sunlight
490:Infrared
414:207–214.
236:See also
167:isotopes
154:such as
132:sieverts
716:chronic
220:Thorium
216:Uranium
175:thyroid
80:sievert
898:, and
229:thoron
179:iodine
134:(Sv).
711:acute
608:X-ray
495:Light
350:(PDF)
343:(PDF)
144:radon
126:Units
218:and
64:rads
19:and
76:rem
916::
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158:.
91:(W
453:e
446:t
439:v
388:*
378:.
359:.
214:"
109:T
105:T
93:T
78:(
72:R
60:T
56:T
45:T
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