CENF target facility civil engineering specifications – summaryM. Calviani (EN/STI) for the CENF-SBWG teamNeutrino Platform Meeting 30th October 2014

M. Calviani - Neutrino Platform meeting 2

StatusCENF target facility civil engineering

specification document approved and released 29th October 2014EDMS 1416787 (SPS-LCENF-ES-0001)

30 October 2014

CE

RN

-0000096740

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StatusDrawings associated (CERN-0000096740):General cuts of the installation:EDMS 1421022 (SPSLCENF0001)EDMS 1421025 (SPSLCENF0002)EDMS 1421024 (SPSLCENF0003)

Implantation of the facility on the Prevessin area:EDMS 1427024 (CENFCE-107550002)To be completed by GS/SE (connection of

GT26 tunnel and road access for 7% slot compatibility)

30 October 2014

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PRELIMINARY

PRELIMINARY

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Plan with ARCADISAccording to discussion with GS/SE, the

work with ARCADIS could start by beginning of December… but we need to clarify the scopeAnd check whether the present CE

requirements meet what has been requested in the contract

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Priorities for the CE study with ARCADIS

1. Review the 2D drawings with the appropriate sizing

Floor loadings, supporting foundations, seismic considerations, under pressure requirements, etc.

2. Construction methods and compatibility with existing infrastructure (see chapter 2.6 of the spec.)

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Priorities for the CE study with ARCADIS

30 October 2014

3. Analyse in detail the water ingress/egress issue, proposing solutions for the problem (see chapter 3)

Protection against water ingress Against rainwater, collected before entering

geomembrane Protection against uncontrolled water egress

To be collected in dedicated sump areas before touching zone outside geomembrane

Implement geomembrane/geotextiles, location based on activation studies (see SPSLCENF***)

Design collection drains (inspectable after operation)

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Conclusions

30 October 2014

Detailed CE specifications have been prepared (and approved) for the CENF target facilityEDMS 1416787 (SPS-LCENF-ES-0001)

Considering the no-go for CENF construction at this stage, we should decide at which level of detail we proceed with ARCADIS in the design phase

Support drawings are essentially ready, so discussions could/should start ASAP