INTERNATIONAL COMMISSION ON RADIOLOGICAL INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ... ICRP

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  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    IRPA 11 11th International Congress of the International Radiation Protection

    Association 23 – 28 May 2004, Madrid, Spain

    2005 RECOMMENDATIONS OF ICRP

    IRPA 11IRPA 11 1111thth International Congress of the International Radiation ProtectioInternational Congress of the International Radiation Protection n

    AssociationAssociation 23 23 –– 28 May 2004, Madrid, Spain28 May 2004, Madrid, Spain

    2005 RECOMMENDATIONS 2005 RECOMMENDATIONS OF ICRPOF ICRP

    ROGER H CLARKE

    CHAIRMAN

    ROGER H CLARKE

    CHAIRMAN

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    FEATURES OF RECOMMENDATIONSFEATURES OF RECOMMENDATIONS

    PUBLICATION 100?

    2005 Recommendations of the International Commission on

    Radiological Protection

    Quantities in Radiological Protection

    Biological Aspects

    General System of Protection

    Quantitative Recommendations

    Optimization of Protection

    Medical Exposures

    Potential Exposures

    Exclusion from the Recommendations

    Radiological Protection of the Environment

    Quantities in Radiological ProtectionQuantities in Radiological Protection

    Biological AspectsBiological Aspects

    General System of ProtectionGeneral System of Protection

    Quantitative RecommendationsQuantitative Recommendations

    Optimization of Protection Optimization of Protection

    Medical ExposuresMedical Exposures

    Potential ExposuresPotential Exposures

    Exclusion from the RecommendationsExclusion from the Recommendations

    Radiological Protection of the EnvironmentRadiological Protection of the Environment

    Volume 35 Issue 4 2005?

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    EFFECTIVE DOSEEFFECTIVE DOSEEFFECTIVE DOSE

    E = ΣΣΣΣ wT ΣΣΣΣ wR DT,R T R

    The major changes are:

    New values of wR are proposed following a review of RBE data

    -for protons wR is reduced from 5 to 2

    -for neutrons < 1 MeV wR is reduced by ~ 2 and recommended in the form of a continuous curve.

    New values of wT are proposed following a review of risk data for somatic and hereditary defects

    -for gonads risk is reduced by ~ 4 following UNSCEAR 2001

    EE = = ΣΣΣΣΣΣΣΣ wwTT ΣΣΣΣΣΣΣΣ wwRR DDT,RT,R T RT R

    The major changes are: The major changes are:

    New values of New values of wwR R are proposed following a review of RBE dataare proposed following a review of RBE data

    --for protons for protons wwRR is reduced from 5 to 2is reduced from 5 to 2

    --for neutrons for neutrons < 1 MeV< 1 MeV wwRR is reduced by is reduced by ~ 2 and ~ 2 and recommended recommended in the form of a continuous curve.in the form of a continuous curve.

    New values of New values of wwT T are proposed following a review of risk data for are proposed following a review of risk data for somatic and hereditary defectssomatic and hereditary defects

    --for gonads risk is reduced by for gonads risk is reduced by ~ 4 following UNSCEAR 2001~ 4 following UNSCEAR 2001

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    PROPOSEDPROPOSED wwRR FOR NEUTRONSFOR NEUTRONS

    wR = 2.5 + 18.2 exp[-(ln En)2/6] …...……for En< 1 Mev = 5.0 + 17.0 exp[-(ln 2 En)2/6]….…..for En >1 MeV

    ICRP 60 histogram

    ICRP 60 function

    2005 Proposed 2005 Proposed functionfunction

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    19901990 20052005

    GonadsGonads 0.200.20 Bone marrowBone marrow 0.120.12

    Bone marrow Bone marrow 0.120.12 BreastBreast Colon Colon ColonColon Lung Lung LungLung Stomach Stomach StomachStomach BladderBladder 0.05 0.05 BladderBladder 0.050.05 Liver Liver LiverLiver Oesophagus Oesophagus OesophagusOesophagus Thyroid Thyroid ThyroidThyroid BreastBreast GonadsGonads SkinSkin 0.010.01 SkinSkin 0.010.01 Bone surface Bone surface Bone surfaceBone surface

    BrainBrain KidneyKidney Salivary glandsSalivary glands

    RemainderRemainder 0.050.05 RemainderRemainder 0.10.1

    PROPOSED PROPOSED wwTT VALUESVALUES

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    TREATMENT OF REMAINDER TREATMENT OF REMAINDER TISSUESTISSUES

    The The wwTT of 0.1 is given to the dose averaged of 0.1 is given to the dose averaged equally over the following 14 tissues or organsequally over the following 14 tissues or organs

    Adipose tissue, Adrenals, Connective tissue, ET Adipose tissue, Adrenals, Connective tissue, ET regionregionaa, Gall bladder, Heart wall, Lymphatic nodes, , Gall bladder, Heart wall, Lymphatic nodes,

    Muscle, Pancreas, Prostate, SI Wall, Spleen, Thymus, Muscle, Pancreas, Prostate, SI Wall, Spleen, Thymus, Uterus/cervix.Uterus/cervix.

    a As defined in ICRP Publication 66, includes anterior (ET1) and posterior nasal passages, larynx, pharynx and mouth (ET2).

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    BIOLOGICAL ASPECTSBIOLOGICAL ASPECTS

    Induction of tissue reactionsInduction of tissue reactions

    RBERBE--weighted absorbed dose weighted absorbed dose ((GyGy--EqEq))

    CancerCancer MechanismsMechanisms EpidemiologyEpidemiology Hereditary effectsHereditary effects Embryo and fetusEmbryo and fetus Genetic susceptibilityGenetic susceptibility

    NonNon--cancer diseasescancer diseases

    DNA mutation

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    DETRIMENT COEFFICIENTS DETRIMENT COEFFICIENTS (% Sv(% Sv--11))

    5.65.64.94.90.10.14.84.8Adult Adult workers workers

    7.37.36.56.50.20.26.3 6.3 Whole Whole populationpopulation

    DetrimentDetriment Pub.60 Pub.60

    Detriment Detriment 20052005

    Lethality Lethality adjusted adjusted heritable heritable effectseffects

    Lethality Lethality adjusted adjusted cancer cancer

    risk risk

    Exposed Exposed population population

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    THE 2005 SYSTEM OF PROTECTIONTHE 2005 SYSTEM OF PROTECTION

    JUSTIFICATIONJUSTIFICATION

    QUANTITATIVE RECOMMENDATIONSQUANTITATIVE RECOMMENDATIONS

    OPTIMIZATION OPTIMIZATION

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    JUSTIFICATION OF NEW JUSTIFICATION OF NEW CONTROLLABLE SOURCESCONTROLLABLE SOURCES

    Justifying net benefit is Justifying net benefit is primarily for the primarily for the appropriate authoritiesappropriate authorities

    Radiological considerations Radiological considerations are only one inputare only one input

    ICRP recommendations apply to practices only ICRP recommendations apply to practices only when declared justified and to natural when declared justified and to natural controllable sourcescontrollable sources

    Patient exposures need separate considerationPatient exposures need separate consideration

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    THE 2005 SYSTEM OF PROTECTIONTHE 2005 SYSTEM OF PROTECTION

    JUSTIFICATION JUSTIFICATION

    QUANTITATIVE QUANTITATIVE RECOMMENDATIONSRECOMMENDATIONS

    OPTIMIZATION OPTIMIZATION

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    THE PUBLIC IS PROTECTED THE PUBLIC IS PROTECTED --

    FROM AFROM A SINGLESINGLE SOURCE IN SOURCE IN NORMAL, EMERGENCY, AND NORMAL, EMERGENCY, AND CONTROLLABLE EXPOSURE CONTROLLABLE EXPOSURE SITUATIONS BY SITUATIONS BY

    THE DOSE CONSTRAINTSTHE DOSE CONSTRAINTS

    FROMFROM ALLALL REGULATED REGULATED SOURCES SOURCES ONLYONLY IN NORMAL IN NORMAL SITUATIONS BYSITUATIONS BY

    THE DOSE LIMITSTHE DOSE LIMITS

  • INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION ——————————————————————————————————

    THE WORKER IS PROTECTED THE WORKER IS PROTECTED --

    FROM AFROM A SINGLESINGLE SOURCE IN SOURCE IN NORMAL, EMERGENCY, AND NORMAL, EMERGENCY, AND CONTROLLABLE EXPOSURE CONTROLLABLE EXPOSURE SITUATIONS BY SITUATIONS BY

    THE DOSE CONSTRAINTSTHE DOSE CONSTRAINTS

    FROMFROM ALLALL REGULATED REGULATED SOURCES SOURCES ONLYONLY IN NORMAL IN NORMAL SITUATIONS BYSITUATIONS BY