From: MENELLE Alain <[email protected]<mailto:[email protected]>>
Date: Wednesday, May 6, 2015 at 10:10 AM
To: LLB - Tables Rondes 
<[email protected]<mailto:[email protected]>>
Subject: Uncertainties on the future of the French neutron source LLB-Orphée


[LLB-Orphee-2-2010]






RéPUBLIQUE  FRANCAISE
cENTRE  NATIONAL DE LA RECHERCHE SCIENTIFIQUE  -   COMMISSARIAT A L'ENERGIE 
ATOMIQUE

LLB, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France


29th April 2015

Dear colleagues,

You are receiving this letter because you are a user of the Laboratoire Léon 
Brillouin, and of its associated Orphée reactor [*] because you are, 
collaborating with one of its research teams or more widely, because you are 
somehow involved in the scientific life of the French national neutron source 
and keen to defend fundamental research and science. We have decided to alert 
you on the growing threat of an early phasing out of the operation of the 
Orphée reactor, whose consequences entail the French neutron community at large.
The 2014 report released by the national council for large-scale facilities, 
and reiterated by France’s Minister for Higher Education and Research in 
response to a written question by a member of Parliament at the beginning of 
2014, provides for continuation of the Orphée reactor operation till 2020 on 
the current basis of 180 days yearly, and states that the LLB itself will 
“continue to exist as a center of excellence” beyond 2020.  However, persistent 
unofficial information is being received of delays, if not outright 
abandonment, of our next nuclear fuel procurement, implying an early shutdown 
in 2017 or, in the “best-case” scenario, a reduced operation schedule of 120 
days yearly to reach 2019.
This strategy has no sound scientific basis as successive evaluation committees 
have reiterated the high quality of the LLB research programs and scientific 
output [**], despite blatant underfunding and understaffing in comparison with 
similar European and international facilities. The will to put an early end to 
the Orphée reactor is made only on the basis of short-term budgetary 
considerations and definitely not on scientific merit. The future operation of 
the LLB-Orphée has to be considered in the context of France’s participation in 
the upcoming spallation neutron source (ESS), the building of which has just 
started in Lund (Sweden), and which is due to be fully operational no sooner 
than 2025. There is serious concern that the parent organizations CEA and CNRS, 
and ultimately the ministry for Higher Education and Research, may try to 
compensate for the momentary rising costs they will have to face by sacrificing 
the national facility.
This is obviously a very serious miscalculation. Investment in the ESS makes 
sense only if it is based on a dynamic community, apt to be the vector of 
innovating projects, with a proven expertise in the use of neutron techniques. 
This is a prerequisite if France is to hold a position in the ESS commensurate 
with its in-kind contribution.  Other major European countries, namely Germany 
and the UK, have fully understood the key role of national sources. Their 
existing national facilities will run well beyond the start of ESS operations. 
A decommissioning is out of purpose. In France if nothing is done to change the 
present course, the lack of prospects offered to those currently committed to 
advancing neutron science and technology at the Orphée neutron source will 
inevitably lead to a breakup of the French community, compromising the future 
use of ESS by France.
We are calling for your support to convince national authorities to implement 
their commitment to securing the procurement of nuclear fuel, and to ensure the 
full power operation of Orphée at least until 2020. The LLB-Orphée musthave the 
necessary means, especially human resources, to keep playing its role for the 
benefit of the scientific community, while also contributing to the preparation 
of the ESS.
LLB directorate and staff personnel

(*) The Orphée reactor is the national French neutron source of the laboratoire 
Léon Brillouin (LLB), which performs neutron scattering experiments to 
investigate condensed and soft matters. The LLB and the Orphée reactor are 
jointly run by the Commissariat à l’Energie Atomique (CEA) and the Centre 
National de la Recherche Scientifique (CNRS).
(**) Rapport AERES 2014: “The visiting committee is concerned about the 
proposed shut down of ORPHÉE in 2020. Firstly, the French neutron community 
needs a local/national/easily accessible neutron source which serves as a 
learning/training/preparing source for getting access at the international 
leading neutron source, namely the ILL. Today about 60 % of all French neutron 
experiments are performed at LLB, 30 % at ILL and 10 % abroad. The visiting 
committee doubts that creating more French CRGs (nb : Collaborating Research 
Groups) at ILL can compensate for the loss of ORPHÉE. Further, first neutrons 
at ESS will not be available before 2021 and another five years are necessary 
to develop an acceptable international user service. Also from that perspective 
a closure of ORPHÈE in 2020 is premature; France weakens its competitiveness 
just at the moment when the supposed to be world’s best neutron source becomes 
available.”
Texte complet : 
http://www.aeres-evaluation.fr/content/download/23601/362403/file/E2015-EV-0912281K-S2PUR150009187-006219-RD.pdf

If you agree to endorse our appeal, could you please take the time to add a few 
words of support and complete the form?
(download pdf 
version<http://www-llb.cea.fr/temporaire/Lettre_soutien_(eng)_29-04-2015.pdf>; 
mail to [email protected]<mailto:[email protected]>)
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