LHC Sector Test meeting held on 06-04-2004 

Subject: Access system requirements during sector test

Present:  Roger Bailey, Mike Lamont, Jan Uythoven, Pierre Ninin, M.G., Juget, Ghislain Roy, Felix

Presentation covering the main issues [pdf] 

Summary:

For Sector 8-1, PM76, PM85, PZ85, Sector 6-7:

- Ensure that test zone is inaccessible while possibility of beam
- Interlock beam off if above conditions are broken
(access system will interlock TI8 main bends, TED in, will not directly inhibit extraction from SPS)
- Ensure the test zone is inaccessible until a radiation survey is performed
- Allow limited controlled access during and after the test

Issues:

• LHCb: PZ85  Clear request for access to counting rooms during sector test. There is a planned access point through shielding wall. Access control might not be fully implemented. Would padlock door – some question about emergency exit from zone. No padlocks in the tunnel, same emergency exit solution (safety lock) as used in the SPS.
• Sector 6-7: Need to make absolutely sure that nobody working in 6-7 sees anything. Agreed that the sector gate be placed at 800 m from IP7. Special purpose temporary installation. Appropriate monitoring will be required.
• Sector 8-1: Position of gate – as for TI8 test, final configuration, door comes out again after the test
• PM76: lock out at surface
• PM85: Controlled access. This would be the sole fully equipped access point and would be used for access during the test.
• Personnel protection via access system...
• EIS: TI8 Bends, TT40 TED +  - to be formally defined.
  Patrol requirements: procedure to be defined.
• Interlock chain: More-or-less as for access safety chain 2, but will special interlock loop for LHC sector and have another name for LHC implementation
• Access during the test will be required
  At least one per day should be foreseen.
  Requirement on users? Tokens – final solution should be in place
  Control from CCC foreseen, also possible from workshop
• Access system will provide input to BIC (to be confirmed) which will inhibit SPS extraction. Configurable if the case of extraction required & LHC not ready (e.g. extraction tests)

Installation
Gates – allow 2 days, who is responsible for pulling the cables? Work in parallel of course.
Pilot application tests – 5 days, need to see all signals . (HWC provides some opportunity but only looks for electrical hazards etc., sector test needs to check machine EIS)
DSO test – 1 day, need standard configuration, force all 5 doors in turn and verify.
4 days with machine shut to fully commission.

Emergency stop? Should be hooked up if final system is in place. Check this. Are they hooked to the access system?
CSAM? Nothing specific to sector test

Re-commissioning TI8
Will have to be done as an integral part of the sector test, can not envisage establishing sub-zone.
TT40, on the other hand, should be possible with zones already defined.

Decommissioning procedure:
Radiation survey will be performed before removal of gates
Get the gates out – 2 days
Get the dump out. Need prior authority for transport of dump.

Formalities
Have to establish prior authority, and what measures will be in place. Should be an addendum to the big report going to INB in summer 2005 (?) where final go ahead for LHC and sector test will be given.
A safety handbook for the project would be desirable.
Report to be prepared (Ghislain, Mike…). Remind Ghislain frequently.