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topGeneral Information

  • A Presentation of DGS/RP/AS is available here: .pdf
  • Demineralized water circulating in the converters may, in some cases, be common to the water circuit of the magnets. This water is controlled at the begining of technical stop. except notification from RP, there is no precaution to be taken when handling the water circuits (change of module, measurement, drain).

topPersonnal Protection

  • Hand Foot monitor mandatory when exit the area if monitor available.

  • PPE (Personnal Protective Equipment) dedicated to radioprotection (mask, glove, overshoes, suit, etc...) sont:
    • Recommended in supervised areas
    • Provided by the responsible to the interveners.
    • Determined and endorsed by RP, on the risk of possible contamination.
    • Mandatory if the wearing of PPE is defined for a zone; It will be clearly delimited, passing without PPE in the zone will be prohibited.
  • Examples of common EPC jobs in: Tunnel Arc + RRxx
    1. Cutting using a disk machine (grinding)
      • The cuts with the aid of a disk machine have to be avoided, with the study of other way of cutting have to be studied.
      • If it is found that the cutting machine is the only way of cutting, a lock chamber (perfectly sealed) must be set up and validated by RP before cutting starts.
      • Wearing some PPE will be ask inside this lock chamber.

    2. Weld
      • The "welding" mode must be approved by RP.
      • In some cases, the installation of a smoke extraction system and the wearing of certain PPE may be requested.

topControl of Material

Type of Material Origin
                           Service  Area                           
(UAxx, UJxx, USA15, USC55)		                                Tunnel                               
(Arc, RRxx)
Equipments Pico-Mur control by user. Deposite in the buffer zone, recording under TREC (Traceability of Radioactive Equipment at CERN), Radiological control by RP (1)
Tools for non-destructive work
(ex: screwdrivers, cutting pliers, ...)		 Pico-Mur control by user. Pico-Mur control by user.
Tools for destructive work
(ex: Drill, tap, ...)		 Pico-Mur control by user. Deposite in the buffer zone, recording under TREC (Traceability of Radioactive Equipment at CERN), Radiological control by RP (1)
Waste Pico-Mur control by user.(4). Deposite in the buffer zone, recording under TREC (Traceability of Radioactive Equipment at CERN), Radiological control by RP (3)(4)
Vacuum cleaner RP (5) Deposite in the buffer zone, recording under TREC (Traceability of Radioactive Equipment at CERN), Radiological control by RP (2) Deposite in the buffer zone, recording under TREC (Traceability of Radioactive Equipment at CERN), Radiological control by RP (2)

Table

  1. (1) Conditions of transport of equipment:
    • No-radioactive
      → Can be transported in a CERN vehicle with a white transfer slip.
    • Radioactive with no risk of contamination and having a dose rate at contact ≤ 5�Sv/h
      → Can be transported in a CERN vehicle with a yellow transfer slip.
    • Radioactive material presenting either a risk of contamination or a dose rate > 5�Sv/h
      → Must be transported internally (EN/HE).

  2. (2) Activated or not, the vacuum cleaners dedicated to the restricted zones must exit zone (service or tunnel), always pass through buffer zones and therefore be subject to an RP check. A vacuum cleaner dedicated to restricted areas, as any radioactive material can only pass through restricted areas. The radiological classification of the latter must be in line with the dose rate of the material transported.

  3. (3) Subject to the following actions:
    • Follow CADRA acceptation.pdf
    • Sort (metal, diverse and combustibles).
    • Pack into translucent plastic bags (SCEM 50.46.02).
    • Deposite in buffer zones.

  4. (4) Waste from the RP vacuum cleaner: to be declared on TREC.

  5. (5) Using RP vacuumm cleaner

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