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Radiological Habits Survey
and Food Monitoring Results
Chris Thomas
Email: [email protected]
Tel: 020 7276 8728
Chris Thomas Food Standards Agency
7 September 2016
Harwell
Site Stakeholder Group
© 2015 Food Standards Agency
What is a Habits Survey?
© 2016 Food Standards Agency
© 2015 Food Standards Agency
Assessment of dose: Where Habits Surveys fit in
© 2016 Food Standards Agency
Monitoring programmes
provide radionuclide
concentrations (and dose rates)
Habits surveys provide
consumption (and occupancy
rates)
Assessment of doses to the
public near nuclear sites
Level of radioactivity in
the food
(Bq per kg)
Amount of food eaten
(kg per year)
Dose
(µSv per year)
Dose coefficient
(µSv per kg
© 2015 Food Standards Agency
Harwell Habits Survey
• The previous survey for Harwell was conducted in 2007.
• The latest survey was conducted by Cefas in 2015 on behalf of the
Food Standards Agency, the Environment Agency and the Office for
Nuclear Regulation.
• Interviews were conducted with members of the public and data were
collected for 394 people.
• The 2015 Harwell habits survey report was published in May 2016 and
is available on the Cefas website.
• The Habits Survey results will be used in subsequent RIFE reports until
the next habits survey is undertaken.
© 2016 Food Standards Agency
© 2015 Food Standards Agency
Aquatic Survey Area
© 2016 Food Standards Agency
© 2015 Food Standards Agency
Moor Ditch
Moor Ditch carries
treated effluent from
Didcot Sewage
Treatment Works to
an outfall in the
River Thames
© 2015 Food Standards Agency
Aquatic food results: Comparison with previous survey
• In 2007, the consumption of
fish (perch) and crustaceans
(signal crayfish) was identified.
• In 2015, no consumption of
these foods was reported by
those interviewed.
• However, reports that fish
(perch or pike) and signal
crayfish were being caught for
consumption and so an
estimate of 1 kg per year has
been used. © 2016 Food Standards Agency
© 2015 Food Standards Agency
Terrestrial and Direct Radiation Survey Areas
© 2016 Food Standards Agency
© 2015 Food Standards Agency
Terrestrial food results: Comparison with the previous survey
• No consumption of local milk
reported in 2015 (family
previously keeping dairy cattle
no longer do so).
• Notable decreases in
consumption of green
vegetables, domestic fruit,
cattle meat, pig meat, wild/free
foods and honey.
• Notable increase in
consumption of poultry.
• Terrestrial includes
farmed fish (rainbow trout) © 2016 Food Standards Agency
© 2015 Food Standards Agency
Aquatic intertidal occupancy and direct radiation
© 2016 Food Standards Agency
© 2015 Food Standards Agency
Monitoring results in 2014
Taken from
Radioactivity
In Food and the
Environment
Report 2014
(RIFE 20)
RIFE 21 for
2015 data will
be published in
October 2016
- No significant
difference to
results in 2015
© 2016 Food Standards Agency
© 2015 Food Standards Agency
Harwell total dose trends
• Total Dose (all major sources): 16 μSv per year
• Most exposed group: Direct radiation to local inhabitant
• Dose from food consumption: Less than 5 μSv per year
© 2016 Food Standards Agency
© 2015 Food Standards Agency
Comparing Doses
7000
© 2016 Food Standards Agency
0
500
1000
1500
2000
2500
3000
3500
Dose (
µS
v)
Thank you for your attention
Chris Thomas
Radiological and Novel Foods Policy, Food Safety Policy
Tel: 020 7276 8728
Email: [email protected]
ANY QUESTIONS?
Harwell Habits Survey:
https://www.cefas.co.uk/publications/environment/harwell2015.pdf
Radioactivity in Food and the Environment Report 2014 (RIFE 20):
www.food.gov.uk/science/research/radiologicalresearch/radiosurv/rife
