SAFETY MEETING 21-03-01

1. Electrical zones - classification of hazardous areas

Note that all areas where flammable gas is used should be classified in
terms of the hazardous area classification (zone1,2,3 etc  page 58
flammable gas safety manual)so that TIS/Electrical specialist can make
inspection & recommendations. This has been done recently for the
gas-mixing zone. The rest are to be classified as soon as possible

a)B908
b)GAS MIXING AREA	= Zone 2 
c) DC + Micromegas 	=
d): RICH TENT		=
e ) MW2		=
f) RICH TEST ZONE	=

J Gulley and M Davenport to classify and then TIS/Electrical to inspect.

2. GAS RACKS TO BE USED IN FLAMMABLE GAS MIXING ENCLOSURE

Note :

All new racks before construction - send circuit diagram of system plus
details of all electrical components and sketch of position in rack to
FGSO and TIS.

All new racks to be inspected/tested by C Margaroli TIS mechanical and G
Salomon TIS Electrical.

RICH CH4
Circuit diagram available
RICH group to provide G Salomon/TIS with a dossier of electrical
component specs of the RICH CH4 re-circulation rack.
GS to discuss with Bosteels' electrician.

MW2: 
Circuit diagram available
If it is proposed to use the Fromm rack as a permanent fixture - then in
this case arrange with F Hahn/D Fromm to change the pipework from
plastic to metallic. 
Mass flowmeters to be checked by TIS/Electric

MW1: (non-flammable)
Details of any electrical components to be supplied to TIS
Plastic pipes admissible
Circuit diagram, of system needed

DC and Micromegas:
New racks or Fromm racks?	
Circuit diagram, of system needed. Details of all electrical components
and sketch of position in rack.
DC: Differential flow measurements - 2 channels - strongly recommended 
(consult F Hahn).
Metal pipes throughout.

RICH test zone gas rack:
Add flow limiter on the pressure regulator of the primary gas rack when
flow limit in B908 is increased.

3. VENTILATION SYSTEM
Position of the ventilation duct exhaust to be decided (JG, MD) and
given to J Lindroos ST/CV
Define Alarm actions if ventilator fault.

4. NOXAL 2% for C4F10 regeneration
Status of tests?

5.  DETECTION HEADS FOR EXPERIMENTAL ZONE

GAS MIXING ZONE	 
4 Heads 0-15% (buy a spare? Possibility to move heads from top to bottom
of enclosure)
4 heads 0-100%
Exhaust connections:
Recommend placing one of the 0-100% heads next to exhaust connections
since all 4 are not needed in enclosure.

Zone 1 : DC + Micromegas
2 Catalytic Heads - must be protected against B field

Zone 2 : RICH TENT
O2, Smoke, CH4 close to chambers were recommended
SDN what is the status?
Alarm actions to define if ventilator fault.

Zone 3 : MW2
SDN or catalytic?
Place one gas retention bund under each  wall 
One head in each bund? (2 in total)

Zone 4 : RICH TEST ZONE
One head

6. RICH TENT
8000m3/hr recirculation,  300 m3/h fresh air, tent volume ~ 420 m3.
Material of tent ?
When will it be installed?
Alarms in tent  (O2, smoke ,CH4 ) What alarm actions ? Must define  the
electrical zone (JG/MD)

7. RICH TEST ZONE 
Need to install audible and visual alarms in zone for Level 2
Cut 220V if Level 3
Exhaust for safety bubbler outside 
Define electrical zone (JG,MD)
Alarm actions same as other zones?

8. MW2 
Materials used in gas connection ?- TIS to authorise
Gas connections - TIS to authorise 
Inertion flow of N2 required.

9.  FLOW LIMITERS B908

CH4 	RICH 		500l/h
CH4 	MW2  		~ 200l/h	
C2H6 DC, Micromegas 	~ 200l/h

To be ordered where necessary by NA58 via M Bosteels

10. GAS EMERGENCY OFF BUTTONS

Request from FGSOC to FGSO/TIS to study functionality in each area and
decide
if to remove or not.
Question to NA58 - What actions does the general emergency off trigger ?
What actions does the general smoke alarm trigger?