uses and prospects in gamma biocide treatments for cultural … · 2017. 4. 26. · laurent...
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Atelier Régional de Conservation
ART ARC -
Atelier Régional de Conservation
ART ARC -
Uses and Prospects in Gamma Biocide
Treatments for Cultural Heritage
Groupement d’Intérêt Public
Laurent Cortella, Claudia Salvan,
Christophe Albino, Quoc Khoi Tran
ARC-Nucléart, CEA Grenoble, France
Atelier Régional de Conservation
ART ARC -
ARC-Nucléart : An Unique Structure for Cultural Heritage Conservation
3000 m2 facilities : irradiation facility, large scale freeze dryers,
impregnation tanks (large scale, up to 14 meter long), restoration
workshops, storage rooms, chemical and biological analysis laboratories
located in Grenoble / France, on the site of the CEA research center
Atelier Régional de Conservation
ART ARC -
An Irradiator Dedicated to Cultural Heritage Conservation
Dose rate from
hundred Gy/h to kGy/h
Industrial sealed sources
A 2000 TBq 60Co pool irradiator (max 3700 TBq)
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by simple gamma ray exposure to fight against biodeterioration
Disinfestations Thanks to Biocide Power
Main pests :
Fungi (mold, rot) and insects
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Disinfestations
Several thousand cubic meter since the 70’s in
ARC-Nucléart:
• Furniture
• Wooden Sculptures
• Ethnological Objects
• Musical Instruments
• Taxidermy
• ...
• Modern Art
Some “exotic” clients
(frozen baby mammoth
and mummies)
The most popular application of gamma radiation in the field of cultural heritage conservation
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Harmlessness
A matter of dose
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Recent Studies
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Theoretical analysis based on literature survey
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Studies in Progress
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Fungicide Treatment of 11 linear kilometer of National Archive
• Discovery on the fifth basement floor: 5 cm of water covering 8 000 m² (July 2015, after the storage
building closed for more than one year due to structural weaknesses)
• 56 000 standard folders boxes
• 1 482 rolls of planes, packaged or not
• 443 portfolios of planes …
55% of packaging contaminated with mold
A large-scale disaster
Atelier Régional de Conservation
ART ARC -
Fungicide Treatment of 11 linear kilometer of National Archive
A conventional solution:
Fumigation with ethylene oxide
• A mastered technique approved by the French
competent cultural authorities
• No facilities in capacity of processing such a
volume of archives in less than six years
• Drastic regulatory rules
An alternative solution:
Gamma Irradiation
• Known to induce cellulose depolymerization
• Widely used in the world
(The Netherlands, Brazil, Romania, Germany,…)
Choice of the fungicide treatment
Atelier Régional de Conservation
ART ARC -
Fungicide Treatment of 11 linear kilometer of National Archive
Biological efficiency:
• 2 main genus of molds: Aspergillus (2 species)
and Penicillium (2 species). Other genus: Botrytis,
Trichoderma…
• Inoculated cellulose disks placed on a culture
medium before to be irradiated with 0, 2, 3, 4, 5, 6
and 8 kGy,
• 3 kGy lead to 100 % inhibition rate on three
species and to 97% inhibition rate on Penicillium
sp. (green with yellow exudates)
minimum dose = 3 kGy
Definition of dosimetry constraints of the treatment Preservation of archive material:
• Abundant literature on effect of gamma
irradiation on classical archive material
maximum dose = 10 kGy ”Paper deterioration by mold is more severe
than by gamma irradiation” - John Havermanns
Atelier Régional de Conservation
ART ARC -
Fungicide Treatment of 11 linear kilometer of National Archive
Standard folders boxes: Industrial facilities
• Better capacity (50 to 100 pallets per week)
• Good mastery of overdose coefficient even on
large pallets
Breakdown of tasks Non standard format or material at
ARC-Nucléart irradiator:
• Complementary studies
• Non automated procedure
1170 pallets 54 “processing units”
Atelier Régional de Conservation
ART ARC -
Atelier Régional de Conservation
ART ARC -
Fungicide Treatment of 11 linear kilometer of National Archive
Materials:
• Tracing paper (rolls, portfolios and long archival storage box),
• Argentic photography (portfolios and long archival storage box)
• Architect blueprint (portfolios)
Measurements:
• FTIR
• Colorimetry
Non-standard archival support materials
Atelier Régional de Conservation
ART ARC -
Fungicide Treatment of 11 linear kilometer of National Archive
Packaging:
Setting of treatment
• Roll Cage
Trolley
(plane rolls)
• Long archival
storage box
(various)
• Portfolios (various)
Atelier Régional de Conservation
ART ARC -
Fungicide Treatment of 11 linear kilometer of National Archive
• Simulation and Preliminary Dosimetry Measurement
Setting of the treatment parameters
Archives nationales, ANF77, Lot 2 : calques en rouleau
Double Roll (60 cm x 160 cm, 1,2 m high, 180 kg)
20 sources, 1767 TBq at 22/08/2016
Double Cage Trolley
Cumulative dose (simulation of 9 hours on each side) Dose rate
50 cm
from the
source rack
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ART ARC -
Fungicide Treatment of 11 linear kilometer of National Archive
Systematic Routine Dose Control Statistical Biological Control
Control
ATP Test (growing activity)
Classical culture on
medium
(before dust removal)
Laure Méric for A2C
for
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ART ARC -
Thank you for your attention
Thanks to:
Sophie Champdavoine
Thomas Guiblain
Mario Muscillo
David Serra
Marie Olivier
Bertrand Gerey
Sarah Nicoud
Jean-Marc Labit
Melissa Poloni
Caroline Durif
Pauline Martinetto
Mihalis Cutribinis
Daniel Negut
Ioana Stanculescu Bernard Buigues Frédéric Lacombat Regis Debruyne
Sergey Gorbunov Petr Lazarev
Atelier Régional de Conservation
ART ARC -
Marie-Dominique Parchas
Marie Courselaud
Michel Thibault
Michel Mastrolillo
Gilbert Leguen
Yvan Pion-Goureau
Laure Méric
Faisl Bousta
Alain Challand
Camille Perez
Wojciech Głuszewski
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