Copyright © 2014 ALLIANCE Updates to the ERICA Tool Barcelona – 10 th September 2014 Nick...

Copyright © 2014 ALLIANCE

Updates to the ERICA Tool

Barcelona – 10th September 2014

www.er-alliance.org

Nick Beresford & Justin Brown

[email protected] (NERC-CEH, UK)


ERICA Tool updates

Since 2007 release have been updatesTypically addressing ‘bugs’


Since 2007 release have been updatesTypically addressing ‘bugs’

The 2014 release will have more substantial updatesDefault radionuclidesCR & kd values revised

Reference organismsEMCL values

ERICA Tool updates


Radionuclides

Added:Ba-140, Ca-45, Cr-51, Cf-252, Ir-192, La-140, Pa-231 & Zn-65

ERICA now consistent with ICRP (Publication 108 & 114) radionuclide lists for their developing RAP approach

CRs, kds, DCC & EMCLs generated for the new default radionuclides


Added freshwater reptile There are European protected freshwater

reptile species

Removed bird eggLack of CR values and inconsistent with other

organisms

Marine macroalgae – geometry now consistent with ICRP 108 (increase in mass from 0.0065 kg to 0.652 kg)

Reference organisms


Reference organisms

Some changes in naming


Transfer parameters

December 2013 version of Wildlife Transfer Database used to revise ERICA ToolHave used data at broad wildlife group level – no

justification to use more refined categories on basis of analyses conducted to date


Transfer parameters



c. 1500 CR values required for the ERICA Tool


CRwo-media – what’s changed


Wildlife Transfer Database

• On-line CR database compiled - initially under remit of IAEA EMRAS WG


Evolution to the IAEA/ICRP

ERICA

New & review data

USDOE R&D128

EPIC

FASSET

IAEA 422

WildlifeDatabase

Canadian U-mine industryCOG monitoring dataRussian language literatureSKB reportsJapanese estuariesAustralian dataData from new studies Post ERICA literature review ........ and more

ICRP 114 & IAEA TRS

479

86979 CRwo values24883 CRwo-sediment

71 elements


Publications

See JER website for others ‘analysing’ database &


Evolution since 2011

WildlifeDatabase

ICRP 114 & IAEA TRS

479

86979 CRwo values24883 CRwo-sediment

c. 17,000 additional CR values added (>80 elements)

Barnett et al in-press ‘UK RAP site’Sheppard studies CanadaNIRS estuarine dataUSA plant and invertebrate data (Napier)Review of Australian data (Hirth/Johansen)US weapons test sites Pu data (Johansen)STUK monitoring dataPost 2011 literature (not comprehensive)

QCRepeat entriesOutliers investigatedConversion errors

ERICA revision

Some refs outBUT ID

numbers will not be reused


http://www.wildlifetransferdatabase.org/


Transfer parameters – ERICA Tool



c. 1500 CR values required for ERICA ToolApproximately 50% derived from empirical data Extrapolation/Guidance approaches to provide missing

data still required

kd received less attention than CR

Tried to minimise previous use of marine kds in freshwater ecosystems


Extrapolation in ERICA 2014

Option 10 – includes approaches to derive pdf (mean and standard deviation)


Will change in ERICA 2014 version

Option 10 – includes approaches to derive missing pdfs (mean and standard deviation)

Information on how derived is given in Tool

Data for elements not included in Tool used to derive default values for options 4 & 5 where appropriate (e.g. Cu used to provide some Ag CR values)


Example changes in CR

Amph

ibia

n

Annel

id

Arthro

pod

- det

ritivo

rous

Flyin

g in

sects

Bird

Grass

es &

Her

bs

Lich

en &

Bry

ophy

tes

Mam

mal

- la

rge

Mam

mal

- sm

all-b

urro

wing

Mol

lusc

- ga

strop

od

Reptile

Shrub

Tree

1E-2

1E-1

1E+0

1E+1

2007

2014

CR Terrestrial (Cs)

Provisional



Amph

ibia

n

Annel

id

Arthro

pod

- det

ritivo

rous

Flyin

g in

sects

Bird

Grass

es &

Her

bs

Lich

en &

Bry

ophy

tes

Mam

mal

- la

rge

Mam

mal

- sm

all-b

urro

wing

Mol

lusc

- ga

strop

od

Reptile

Shrub

Tree

1E-3

1E-2

1E-1

1E+0

1E+1

2007

2014

CR Terrestial (Po) Provisional



1E-1

1E+0

1E+1

1E+2

1E+3

1E+4

1E+5

2007

2014

Freshwater CR (Ra)



Amph

ibian

Benth

ic fis

hBird

Moll

usc

- biva

lve

Crust

acea

n

Moll

usc

- gas

tropo

d

Inse

ct la

rvae

Mam

mal

Pelagic

fish

Phyto

plank

ton

Vascu

lar p

lant

Zoopla

nkto

n

Reptile

1E+1

1E+2

1E+3

1E+4

2007

2014

Freshwater CR (U)Provisional



1E+1

1E+2

1E+3

1E+4

1E+5

1E+6

2007

2014

CR Marine (Am)


Example changes in Kd

Ag Am C Cd Ce Cl Cm Co Cs Eu H I Mn Nb Ni Np P Pb Po Pu Ra Ru S Se Sr Tc Te Th U Zr

1E-2

1E-1

1E+0

1E+1

1E+2

1E+3

1E+4

1E+5

1E+6

1E+7

1E+8

Marine Kd


Example changes in Kd

Ag Am C Cd Ce Cl Cm Co Cs Eu H I Mn Nb Ni Np P Pb Po Pu Ra Ru S Sb Se Sr Tc Te Th U Zr

1E-1

1E+0

1E+1

1E+2

1E+3

1E+4

1E+5

1E+6

1E+7

1E+8Freshwater Kd

Provisional


Distributions CR and kd

Where an SD available then lognormal distribution assumedOriginal ERICA Tool assumed exponential distributions

when no SD value for CR or kd

data extrapolation approach used to derive CR valueThis did not make best use of available information and can

likely lead to some extreme EMCL estimates For revised Tool database

Tried to derive default SD values when not available and hence assume lognormal & not exponential distributions


Marine kd – distribution change e.g. Ag


Marine kd – distribution change e.g. Ag


Corrections in Tool

Terrestrial amphibian and reptile – default occupancy now 100% in soil

Lichen & bryophytes – all external DCCs recalculated


Revised EMCL values

The EMCL is the media activity concentration that gives rise to the screening dose rate (10 µGy/h) to the most exposed organism – used in Tier 1

All need to be recalculated using revised parameters (kd & CR (+ associated pdfs), occupancy, DCCs)


Revised EMCL values - terrestrial

Ag-110m

Am-2

41C-1

4

Cd-109

Ce-141

Ce-144

Cl-36

Cm-2

42

Cm-2

43

Cm-2

44

Co-57

Co-58

Co-60

Cs-134

Cs-135

Cs-136

Cs-137

Eu-152

Eu-154

H-3

I-125

I-129

I-131

I-132

I-133

Mn-5

4

Nb-94

Nb-95

Ni-59

Ni-63

Np-237

P-32

P-33

Pb-210

Po-210

Pu-238

Pu-239

Pu-240

Pu-241

Ra-226

Ra-228

Ru-103

Ru-106

S-35

Sb-124

Sb-125

Se-75

Se-79

Sr-89

Sr-90

Tc-99

Te-129m

Te-132

Th-227

Th-228

Th-230

Th-231

Th-232

Th-234

U-234

U-235

U-238

Zr-95

1E+0

1E+1

1E+2

1E+3

1E+4

1E+5

1E+6

1E+7

Provisional


Revised EMCL values

Ag-110m

Am-2

41C-1

4

Cd-109

Ce-141

Ce-144

Cl-36

Cm-2

42

Cm-2

43

Cm-2

44

Co-57

Co-58

Co-60

Cs-134

Cs-135

Cs-136

Cs-137

Eu-152

Eu-154

H-3

I-125

I-129

I-131

I-132

I-133

Mn-5

4

Nb-94

Nb-95

Ni-59

Ni-63

Np-237

P-32

P-33

Pb-210

Po-210

Pu-238

Pu-239

Pu-240

Pu-241

Ra-226

Ra-228

Ru-103

Ru-106

S-35

Sb-124

Sb-125

Se-75

Se-79

Sr-89

Sr-90

Tc-99

Te-129m

Te-132

Th-227

Th-228

Th-230

Th-231

Th-232

Th-234

U-234

U-235

U-238

Zr-95

1E-6

1E-4

1E-2

1E+0

1E+2

1E+4

1E+6

1E+8

Marine water

Provisional


Revised EMCL values

1E+0

1E+1

1E+2

1E+3

1E+4

1E+5

1E+6Marine sediment


Revised EMCL values

1.00E-04

1.00E-02

1.00E+00

1.00E+02

1.00E+04

1.00E+06

1.00E+08

Freshwater - water


Revised EMCL values

Isot

ope

Am-2

41

Cd-10

9

Ce-14

4

Cm-2

42

Cm-2

44

Co-58

Cs-13

4

Cs-13

6

Eu-15

2H-3

I-129

I-132

Mn-

54

Nb-95

Ni-63

P-32

Pb-21

0

Pu-23

8

Pu-24

0

Ra-22

6

Ru-10

3S-3

5

Sb-12

5

Se-79

Sr-90

Te-12

9m

Th-22

7

Th-23

0

Th-23

2

U-234

U-238

1E-3

1E-2

1E-1

1E+0

1E+1

1E+2

1E+3

1E+4

1E+5

1E+6

1E+7

Freshwater - sedimentProvisional


Benchmarks

40 µGy/h will apply to aquatic mammals & birds


Tier 2 – uncertainty factors

Current UF values of 3 and 5 usedIntended to approximate 95th and 99th%ile RQs

Paper published suggesting that these should be 7 & 28


Tier 2 – uncertainty factors

Demonstrated that UFs of 7 and 28 approximate to 97.5 and 99.5th percentiles


Future changes

Multiple site/time entry functionality Revised IAEA SRS dispersion models Include ICRP DCRLs Dosimetry – half-life rules? Rn models? Noble gases? SRS approach for continuous terrestrial releases?


On-line Q&Awww.ceh.ac.uk/PROTECT/


On-line Q&Awww.ceh.ac.uk/PROTECT/


Refresher course

Intending to run a short update course once new Tool version released under the STAR NoE

Will try to do this as webinar

To register an interest email [email protected]

Note also willing to tailor course to needs (e.g. two run in Australia)

mailto:[email protected]


See also:

ICRER abstract on changes to the Wildlife Transfer Database: Beresford et al. P-104

ICRER abstract on updating Environmental Media Concentration Limits and Uncertainty factors in the ERICA Tool: Brown et al. P-127

From: https://intranet.pacifico-meetings.com/amsysweb/publicacionOnline.jsf?id=146

https://intranet.pacifico-meetings.com/amsysweb/publicacionOnline.jsf?id=146





Thanks to:

B. Alfonso (Facilia Sweden)D. Copplestone (University of Stirling, UK)A. Hosseini (NRPA, Norway) E. Dagher (CNSC, Canada)G. Hirth (ARPANSA, Australia) M. Johansen (ANSTO, Australia)J. Napier (University of Oregon, USA) I. Outola (STUK, Finland) S. Sheppard (ECOMatters, Canada)S. Uchida (NIRS, Japan)C. Wells, C.L. Barnett (NERC-CEH, UK)

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