Radon in Brazil: legislation, current situation and future actions

Radon in Brazil: legislation, current
situation and future actions
Nivaldo Carlos da Silva
Brazilian Commission for Nuclear Energy - CNEN
Brazilian Commission for Nuclear Energy- CNEN
DIFOR, Fortaleza
CRCN-NE, Recife
DICAE, Caetité
DIPLAN, Brasilia
CRCN-CO, Goiânia
CDTN, Belo Horizonte
LAPOC, Poços de Caldas
IPEN, São Paulo
CNEN CEO, IRD; IEN, DIANG (Angra dos Reis) ,
Rio de Janeiro
Nuclear regulatory authority and research &
development
Brazilian Legislation related to Radon
Brazilian Basic Standard for Radiation Protection
(Norma CNEN NN 3.01/2011- Diretrizes Básicas
de Proteção Radiológica):
1.2 Scope (CAMPO DE APLICAÇÃO)
1.2.4 The intervention situations to which this
standard applies are (As situações de intervenção
às quais esta Norma se aplica são:)
b) Those resulting from chronic exposure
situations that require remediation action to avoid
or reduce them (aquelas decorrentes de situações
de exposições crônicas que requeiram uma ação
remediadora para reduzi-las ou evitá-las)
2.2 Related documents
g) Levels of Intervention and Action for Chronic
Exposure; (R-3.01/007: Níveis de Intervenção e
de Ação para Exposição Crônica)
6. Requirements for intervention (Requisitos para
intervenção)
6.4 Chronic exposure (Exposição crônica)
6.4.1 The remediation plan, ..., shall specify the
remediation actions and the justified/optimised
action levels, considering ... (Planos de ações
remediadoras, ..., devem especificar as ações
remediadoras e os níveis de ação justificados e
otimizados, considerando...
Levels of Intervention and Action for Chronic
Exposure; (R-3.01/007: Níveis de Intervenção
e de Ação para Exposição Crônica)
3.1 Chronic exposure situation: (situações de
de exposições crônicas)
b)
Exposures
arising
from
the
natural
radionuclides present in the soil at higher
levels (exposições decorrentes da presença de
radionuclides naturais presentes no solo em
nível elevados).
Brazilian Legislation related to Radon
Levels of Intervention and Action for Chronic
Exposure; (R-3.01/007: Níveis de Intervenção
e de Ação para Exposição Crônica)
3.1 Chronic exposure situation: (situações de
de exposições crônicas)
b)
Exposures
arising
from
the
natural
radionuclides present in the soil at higher
levels (exposições decorrentes da presença de
radionuclides naturais presentes no solo em
nível elevados).
Brazilian Legislation related to Radon
3.2 Generic level recommended by CNEN
10 mSv/year
Current Situation
Radon Public Exposure in Brazil
•There is a strong belief that radon is
not a “national health problem” in
Brazil due to its climate , but...
Radon Public Exposure in Brazil
• Brazilian
Geology is
very
diverse,
including
some
uranium
deposits
Radon Public Exposure in Brazil
• Studies have found areas with quite
high radon concentrations, e.g. Rio
Grande do Norte
• The way dwellings are used are
changing (closed rooms with air
conditioner)
in addition to all of that…
Radon Public Exposure in Brazil
• It would be great to prove that
radon is not a "national health
problem"
The idea of generating a Radon-map
of Brazil has emerged recently
Where we are???
• Surveys conducted by several research
teams
Future Actions
IAEA Technical Cooperation
Challenges for Brazilian radon mapping
¾ Number of samples
Area
~8.5 M km2
Population
~ 200 million
Dwellings
~ 50 million
Sample
500,000??
250,000??
125,000??
In conclusion….
¾ It is high time for assessment of
exposition to radon in Brazil following
international recommendations: WHO,
ICRP and IAEA
But before start…
9 It is highly advisable learning with the
international experience
9 An finally plan a national survey
Thank you for attention!!!
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