CERN Safety Alarm System Supervisory Board

Minutes of the meeting no. 4 held on 24.08.2000
Subjects:
Author: Uwe Epting
Participants: Paolo CIRIANI (ST), Uwe EPTING (ST) (Secretary), Andre FAUGIER (AC), Luigi FERRARA (SPL), Silvia GRAU (ST), Harry LAEGER (ST), Pierre NININ (ST), Keith POTTER (EST), Dietrich SCHINZEL (EP), Helmut SCHONBACHER (TIS) (Chairman), Luigi SCIBILE (ST), Wolfgang WEINGARTEN (TIS)
Distribution: Participants, Manuel DELFINO (IT), Lyn EVANS (DG), Paul FAUGERAS (AC), Giorgio GOGGI (EP), Dietrich GUSEWELL (EST), Kurt HUBNER (DG), Claude JACOT (ST), Greg KOWALIK (ST), Philippe LEBRUN (LHC), Jurgen MAY (DG), Stephen MYERS (SL), Rui NUNES (ST), Paul PROUDLOCK (AC), Alberto SCARAMELLI (ST), Vincent VUILLEMIN (EP)

1. Approval of the minutes of the second and third meeting

The minutes of the second and third meeting have been approved after some modifications. The approved minutes should also be sent to all directors and division leaders of the technical divisions involved like EP, LHC, IT, SL and to Claude Jacot as quality assurance linkman for the INB.

2. CSAM Technical Specification

Pierre Ninin and Luigi Scibile presented the CSAM technical specification. You may find the slides of the presentation at http://cern.ch/st-div/mo/CSAM/sup_board/minutes/presentations/PN_LS_20000824.ppt and an executive summary at http://cern.ch/st-div/mo/CSAM/sup_board/minutes/approved/20000824_ExecSumm.doc
A copy is attached to the paper version of these minutes.

Remarks and Questions:
The firebrigade may consult the technical information, like availability of the system, if they wish. The technical information is used for the TCR monitoring. The firebrigade should only see what they need to perform an action. All other information may be confusing.

Hardwired links are needed at least for the transition period. As they exist already, they might be maintained in the future. A dedicated network that transmits the necessary information, which cannot be transmitted by the hardwired links has to be added.

Safety zones being installed currently are considered in the project and will be connected to the CSAM system. Yearly checks of detectors are not included in the CSAM maintenance costs.

K. Potter: What happens if the pilot installation is not satisfactory? The pilot installation will be conducted by CERN. In any case the contract can be cancelled if the pilot installation is not satisfactory. This is not expected, because the chosen company has to proof its competence before placing the contract.

D. Schinzel: Why do you use 2 PLCs in serie? For redundancy reasons. The two that act as receivers of the alarm information treat the data for presentation to the TCR and the Fire Service

A. Faugier: Who is doing the maintenance of the system? The chosen company will do this. Clear procedures will be set up following the IEC 61508 standard to ensure a proper maintenance.

K. Potter: The gateway to external systems (experiments) is very important and is asked by the experiments. They need to be informed in case of alarms.

A. Faugier: Is a future removal of the hardwired link possible? In principle yes, the system follows SIL-2 even without the hardwired link.

3. Conclusions of the LHC Communication Infrastructure Working Group Conclusion and sum up

Pal Anderssen prepared a new proposal for the communication infrastructure. This was reviewed and technically accepted by the CSAM team. One safety dedicated network path, which does not relate on the existing one, was added.

A memo, written by the CSAM team, will be attached to the LHC CIWG proposal. A final acceptance of the proposal can only be given when the costs are known.

created at Fri Apr 6 17:13:24 METDST 2001 with the ST/MO/IN - Minutes Maker