Abstract
Jules Horowitz Reactor (JHR), a major infrastructure of European interest in the fission domain, will be built and operated in the framework of an international cooperation, including the development and qualification of materials and nuclear fuel used in nuclear industry. For this purpose UGXR Collimators, two multi slit gamma and X-ray collimation mechatronic systems, will be installed at the JHR pool and at the Irradiated Components Storage pool. Expected amounts of radiation produced by the spent fuel and X-ray accelerator implies diverse aspects need to be verified to ensure adequate radiological zoning and personnel radiation protection. A computational methodology was devised to validate the Collimators design by means of coupling different engineering codes. In summary, several assessments were performed by means of MCNP5v1.60 to fulfil all the radiological requirements in Nominal scenario (TEDE < 25µSv/h) and in Maintenance scenario (TEDE < 2mSv/h) among others, detailing the methodology, hypotheses and assumptions employed.
Highlights
Jules Horowitz Reactor (JHR), built on the Cadarache site, will be a major infrastructure of European interest in the fission domain, open to the international collaboration
The JHR will be built and operated in the framework of an international cooperation between several organizations bound by a Consortium Agreement, one of whose main aim is the development and qualification of materials and nuclear fuel used in nuclear industry
The higher dose rate values are located in the UGXR Collimators lower area due to a downside primary photon streaming caused by the scattering of the collimated gamma flux against the post-collimator wheel and collimator as shown in Fig-8, Fig-9, Fig-10 and Fig-11
Summary
Jules Horowitz Reactor (JHR), built on the Cadarache site, will be a major infrastructure of European interest in the fission domain, open to the international collaboration. The JHR will be built and operated in the framework of an international cooperation between several organizations bound by a Consortium Agreement, one of whose main aim is the development and qualification of materials and nuclear fuel used in nuclear industry. The necessities to design and build new material testing reactors to support operation of the existing power reactors fleets and qualification of future technologies systems have led to the development of precise mechatronic systems compliant with the experimental requirements and with the very demanding nuclear safety constraints, such as UGXR Collimators. Dose rate compliance is evaluated by mean of radiation transport calculations through MCNP5v1.60 [Ref. 1] and the use of SCALE6.1/ORIGEN-S [Ref. 2] for the source term definition, both intensity gamma and energy spectra
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