cenf safety analysis status 6 feb 2014 n.
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CENF Safety Analysis Status 6 Feb 2014. CENF Project is in 3 zones (preparation for the safety folder): Primary beam line. Target and Secondary beam areas. EHN1 experimental area extension. Safety aspects for Construction, Operation and Dismantling are treated separately.

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slide2

CENF Project is in 3 zones (preparation for the safety folder):

  • Primary beam line.
  • Target and Secondary beam areas.
  • EHN1 experimental area extension.
  • Safety aspects for Construction, Operation and Dismantling are treated
  • separately.
  • Operation includes commissioning, shutdown activities etc.
slide4

Preliminary Risk Analysis for CENF SB areas

  • Motivation is for the “Access System” , which has two parts: Access control and Beam protection.
      • Interlocks cannot protect from activated materials
      • Access system will ensure correct ventilation for access
      • Specialist access is needed for equipment in cooling room/service pit
      • Non- Access system safety systems:
      • Many hazards will be controlled by procedures: DIMR, Beam Permits..
      • BIW, AUG, Training.
      • Safety zones for crane operations.
      • Fencing around pits.
      • Smoke detection
      • Radiation and ventilation pressure monitoring.

CENF: APR progress

slide5

Target and Secondary AdR results:

  • which will be resumed in an EDMS document(when I get access to CENF node)
  • discussions clarified many areas, potential issues were defused before they became costly problems- a positive benefit from the exercise (as has been seen in other cases).
  • following the study some ideas have been modified, these will be integrated in the summary document too. Any changes will have verification through the EDMS approval process (no new meetings).
  • The AdR will be reviewed at the transition to the construction phase.
  • Other issues to have further clarification include :
  • water tightness of the DP works,
  • drainage and radiation issues (target area and DP activated water),
  • construction and commissioning  issues with the DP,
  • Dismantling plans,
  • Use of morgue space and blocks handling/ temporary storage.
slide6

Preliminary Risk Analysis for CENF SB areas

      • Noteworthy points:
      • Ventilation monitoring of δP (for operation) and flushing for access, this is a new development for the CV group.
      • Weakest link: the search procedure (as for all radiation areas), as in other areas the procedure will have a written protocol.
      • Beam Permit : this is an important element in the overall preparation for beam. A risk analysis shows that it is sufficiently reliable for its purpose.
      • Ion exchangers are radiation hot spots: worse than beam effects. An unexpected result: activated materials are a higher residual risk than beam, due to good shielding design.

CENF: APR progress

slide7

Next Step: The EHN1 extension

  • An AdR is needed for the Experimental area,
  • Existing measures in EHN1 have no risk analysis published.
  • The new facility introduces different hazards.
  • Project details are still evolving but many aspects can be considered as fixed.
  • Specialist Input will be needed for Cryo hazards estimates and control methods.
  • Gran Sasso risk analysis needs revision as risks have changed (not separate halls, cryo “windows”, secondary beam, large population in vicinity..)
  • Dedicated issues for the project meetings? Should be driven by project team, not safety.