Workshop on Beryllium Applications and Health amp Safety Aspects for ITER ITER Organization 30 June 2017 Summary by M Merola IO and P Lorenzetto F4E The views and opinions expressed herein do not necessarily reflect those of the ITER Organization ID: 631541
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Slide1
Session 2 - Specifications and Design of Beryllium Facilities
Workshop
on Beryllium Applications and Health & Safety Aspects for ITERITER Organization30 June 2017
Summary by:M. Merola (IO) and P. Lorenzetto (F4E)
The views and opinions expressed herein do not necessarily reflect those of the ITER OrganizationSlide2
Session 2 - Agenda
Session 2 - Specifications and Design of Beryllium Facilities
Chairs: P. Lorenzetto / M. MerolaCouncil Room
Functional Requirements for ITER Facility to Store and Handle Beryllium Components Spencer Pitcher (IO)Specifications/Design/Construction of Atmostat Beryllium Facilities (including equipment required inside the beryllium facility) Denis Conchon (
Atmostat
, France)
Specifications/design/Construction and Operation of AREVA Beryllium facility
Delphine
Bossu
(AREVA)
Benchmarking and Design of Beryllium Facilities (including equipment required inside the beryllium facility)
Kathy Creek (Beryllium Health and Safety Committee, US)
Discussion
AllSlide3
Functional Requirements for ITER Facility to Store and Handle Beryllium Components
-
Spencer Pitcher (IO)A Working Group was formed in October 2016. It concluded in April 2017, with a decision to build a dedicated beryllium facility to bridge the gap between the arrival at IO site of the Blanket FW panels (Dec 2024) and the availability of the Hot Cell (2029)The main objective of the beryllium facility is to perform the “trial fit” between the FW panels and the corresponding Shield Blocks prior to their installation into the ITER machine.Slide4
Functional Requirements for ITER Facility to Store and Handle Beryllium Components
-
Spencer Pitcher (IO)The beryllium facility has to comply with the regulation / safety / security: To provide static and dynamic confinement To prevent, detect and mitigate internal risks, external risks and malevolenceSlide5
Specifications/Design/Construction of
Atmostat
Beryllium Facilities - Denis Conchon (Atmostat, France)
Presentation about Atmostat’s Beryllium workshop at Villejuif (F) made by Denis Conchon. Worshop devoted to Be machining and grinding operations but also for assembly, welding, etching, ultrasonic examination, cleaning and Be storage needed for the manufacture of FW Be-armored components and for many other applications.
Stringent precautions are implemented to minimize the production of Be airborne and avoid contact of Be with workers as Be is considered as allergen material.
Respiratory Protective
Equipments
are used by workers and Be exposure is assessed by representative sampling.
Be dust and airborne limits are in accordance with Occupational Exposure Limit in France (2 µg/m
3
).
Surface contamination on the ground can go up to 300 µg/m
2
.
In-house spectrometry analysis equipment allows fast checks.
Beryllium confinement ensured through properly designed depressurization system and air control system (air change rate 3/
hr
). In particular, for highly Be dust generating operations (machining, grinding), exhaust ventilation is located as close as possible of the source.
Wet methods preferred. Particular attention devoted to
BeO
.
Weekly cleaning of the workshop.
All Be containing wastes (liquids, solids) are collected for proper waste processing.
Medical supervision performed for each operator including skin examination and yearly sensitization checks. Positive results lead to the exclusion of the worker from Be controlled zones.
Thanks to their close Be monitoring, no disease of workers identified so far.Slide6
Specifications/Design/Construction of
Atmostat
Beryllium Facilities - Denis Conchon (Atmostat, France)
Many detailed questions about the operation of the Atmostat facility addressed after the presentation. In particular:Proliferation test performed at the Hôpital Henri Mondor
(Creteil, F).
Installation classified ICPE because the electrical power installed in the workshop exceeds the limit, not because of Be since the quantity handled (several kg) is far below the limit for an ICPE (about 10 tons).
No automatic fire extinguishers in the workshop.
A question about scatter band obtained for the contamination measurements by smear tests gave very different responses, from 10% to 50% up to being a non representative test. Variability of the result decreases with larger surfaces swept.Slide7
Specifications/design/Construction and Operation of AREVA Beryllium
facility -
Delphine Bossu (AREVA)
Presentation about AREVA’s Beryllium facility at the Technical Center in Le Creusot (F) made by Delphine Bossu.Facility devoted to assembly, welding, etching, ultrasonic examination operations and Be storage needed for the manufacture of FW Be-armored components.Beryllium confinement ensured through properly designed depressurization system and air control system.
All Be containing wastes (liquids, solids) are collected for proper waste processing.
Health monitoring of the operators essential. Implemented following four main routes:
authorization provided by the occupational
medecine
and training,
protection of the workers,
Be monitoring and
medical follow-up.
AREVA prepared to cope with the planned more restrictive Be limits. Slide8
Specifications/design/Construction and Operation of AREVA Beryllium
facility -
Delphine Bossu (AREVA)
Many detailed questions about the operation of the AREVA facility addressed after the presentation. In particular:Installation not classified ICPE because the quantity of Be handled (several kg) is much less than the limit (about 10 tons). No automatic fire extinguishers. The operation generating the largest quantity of waste is ultrasonic testing due to the amount of contaminated water used.
Further improvements of the protection of the workers being considered using
costumized
individual RPEs, better fitting the facial morphology of each worker
.Slide9
Benchmarking and Design of Beryllium Facilities
-
Kathy Creek (Beryllium Health and Safety Committee, US)
Presentation about benchmarking and design of beryllium facilities led to the following main outcome:Facilities had different approaches for the level of operational, facility, personal protective equipment, and exposure monitoring controls or methodsMedical surveillance varied from employee required to voluntary
Sampling logic and the use of data varied drastically
A number of lessons learned and practical considerations were reported, in particular
Hospital Operating
Room Level
of
Cleanliness
(Class 10,000 clean room)
10-12 air changes per hour,
laminar flow
of
room air
Clean-room
design considerations
such
as recessed lighting
Seal all electrical system conduits (control
system wiring
, fire protection, communications
wiring) that
penetrate into the beryllium
areas
Smooth Surfaces, No wood, No unsealed
concrete
Air and surface sampling should be used as a
daily control measure
Recommend the laboratory be near but not in
the facility
Laboratory should be
adequately staffed with trained personnelSlide10
Benchmarking and Design of Beryllium Facilities
-
Kathy Creek (Beryllium Health and Safety Committee, US)
Cont’d:A number of lessons learned and practical considerations were reported, in particularFacility access by badge reader with link to worker being up-to-date on training and medical surveillance In-house laundry and water
soluble laundry bags (dissolve
at higher
temperature)
Equipment, isolation points, and controls need
to be
outside the beryllium area as much as
possible to
allow for preventative maintenance and
repairs without exposure
Minimize or eliminate the use of “
one-of-a-kind” software
, equipment, or systems as well
as equipment/software
that is
proprietary
Use
Nuclear Grade Filtration Systems that are designed to
be safely maintained and tested; Use multiple filtration steps with
HEPA filtration
for final
stage
Use high quality components;
Reputable manufacturers
Use components
that last
(i.e., LED
lighting vs
fluorescent
)
Staff with experience in control of beryllium operations is a must for the design and initial implementation phasesSlide11
Thank you for your attention