no marking required. discharges and environmental monitoring 2012 jim desmond environmental...
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No Marking Required
No Marking Required
Discharges and Environmental Monitoring 2012
Jim Desmond
Environmental Monitoring & Assessments Manager
WCSSG Environmental Health Sub-committee
Date: 28th November 2013
No Marking Required
No Marking Required
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Dose pathways at Sellafield for marine dischargesNo Marking Required
No Marking Required
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Sellafield marine monitoring locationsNo Marking Required
No Marking Required
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Dose to marine critical group by Radionuclide (91 Sv - seafood consumption - 2012)
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No Marking Required
0
50
100
150
200
250
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Year
Do
se ( S
v)
Carbon-14 Technetium-99 Plutonium alpha Plutonium-241 Americium-241 Others
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Pathway contributions to marine critical group total dose (130 Sv - 2012)
No Marking Required
No Marking Required
0
50
100
150
200
250
300
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Year
Do
se
(
Sv
)
Cod Plaice Lobster Crab Nephrops Winkles Mussels & Other Molluscs
Aerial pathways External radiation frombeach occupancy
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Pu(alpha) Concentration in Mussels vs. Marine DischargesNo Marking Required
No Marking Required
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
1993 1995 1997 1999 2001 2003 2005 2007 2009 2011
Year
Dis
char
ge
(TB
q)
0
2
4
6
8
10
12
14
16
18
20
Co
nce
ntr
atio
n (
Bq
/kg
)
Discharge
Concentration in mussels
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241Am Concentration in Mussels vs. Marine DischargesNo Marking Required
No Marking Required
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1993 1995 1997 1999 2001 2003 2005 2007 2009 2011
Year
Dis
char
ge
(TB
q)
0
5
10
15
20
25
30
Co
nce
ntr
atio
n (
Bq
/kg
)
Discharge
Concentration in mussels
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Dose from Mussel consumption for Pu(Alpha) and 241Am
0
5
10
15
20
25
30
1993 1995 1997 1999 2001 2003 2005 2007 2009 2011
Date
Co
nsu
mp
tio
n r
ate
(kg
/yea
r)
0
10
20
30
40
50
60
Do
se ( S
v/an
nu
m)
Mussels Consumption rate
Dose - Pu-alpha
Dose - Am-241
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99Tc Concentrations in Lobster vs. dischargesNo Marking Required
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0
20
40
60
80
100
120
140
160
180
200
220
240
1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012Year
Dis
char
ge
(TB
q)
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
Co
nce
ntr
atio
n (
Bq
/kg
)Discharge
Concentration in lobster
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Dose from Lobster consumption for 99TcNo Marking Required
No Marking Required
0
1
2
3
4
5
6
7
8
9
10
1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012Year
Co
nsu
mp
tio
n r
ate
(kg
/yea
r)
0
5
10
15
20
25
Do
se ( S
v/an
nu
m)
Lobster Consumption rate
Dose
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Dose pathways at Sellafield for aerial dischargesNo Marking Required
No Marking Required
DispersionCloudCloud
irradiationirradiation
InhalationInhalationDrinkingDrinkingwater water
DepositionDeposition
Milk productionMilk production Milk/meat Milk/meat consumptionconsumption
Consumption ofConsumption offruit & vegetablesfruit & vegetables
Gamma irradiationGamma irradiationfrom groundfrom ground
depositsdeposits
Rainwater
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Sellafield terrestrial monitoring locationsNo Marking Required
No Marking Required
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Nuclide contributions to terrestrial critical group dose (Foodstuff 9.4 Sv, Total 12 Sv)
No Marking Required
No Marking Required
0
5
10
15
20
25
30
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Year
Do
se ( S
v)
Carbon-14 Strontium-90 Technetium-99 Ruthenium-106 Iodine-129 Iodine-131 Caesium-137 Others
11 April 2023 15
Pathway contributions to terrestrial critical group dose (Foodstuff 10 Sv, Total 13 Sv)
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0
10
20
30
40
50
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Year
Do
se ( S
v)
Milk Potatoes Other foodstuffs Inhalation Other Discharge Pathways Direct radiation
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Review of the Monitoring Programme
• This is the seventh year of the revised monitoring programme.
• The programme continues to work well with no significant omissions.
• Audited by EA/NII in February 2009 and EU (Article 35) in August 2011 – no major issues identified.
• A Best Available Techniques style review of the environmental monitoring programme completed in September 2011.
– http://sellafieldsites.com/wp-content/uploads/2012/08/Environmental-Monitoring-BAT-Case-12-Dec-2011-for-website.pdf
• No changes to programme for 2014.
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No Marking Required
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Summary
• Marine discharges remain at historic low levels.• Concentrations of actinides in molluscs continue to decrease.• The combination of decreasing concentrations and
consumption rates has resulted in a further reduction of marine critical group dose, 130Sv.
• Dose to terrestrial critical group remains well below 20Sv.• Doses below 1000Sv dose limit for the general public.
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No Marking Required