[ RadSafe ] Limits on airflow from a contamination-control area

[Ross Beveridge]

A replacement of an old UK AECP 1054 (Atomic Energy Code of Practice) has
recently been updated (January 2009).  This  new document (NVF/DG001) gives
excellent information on the ventilation requirements for nuclear facilities
and covers not only permanently established controlled areas but also
temporarily ventilated areas when non-routine work is being carried out
(outage type operations/maintenance of gloveboxes or other engineered
containment structures).  This is based on UK statutory legislation but the
principles are universal.

A copy is attached.

Regards
Ross Beveridge
RPA


-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On Behalf
Of WHILLANS David -NUCLEAR
Sent: 13 July 2009 11:10
To: radsafe at radlab.nl
Cc: VILLEMAIRE M J -NUCLEAR; BEREGIC Virgiliu -PICKERING; CHRISTIANI Warren
-NUCLEAR
Subject: [ RadSafe ] Limits on airflow from a contamination-control area

Radsafers,

Our company is interested in industry standards for the control of airflow
out of a contamination-control area, especially in a reactor environment,
and how this is monitored. Specifically,

*	What air flow rate out of a contamination-control area is
considered acceptable in the rest of the industry? (possibilities, "air must
always flow into the rubber area",  1 m/s, 1 km/h, etc.)
*	What techniques are used to determine that air flow does not
exceed the acceptable rate?  (possibilities: smoke bulb tests, pocket
anemometer, "if you can feel it on your face it is too much",  etc.)

Please respond to 

Virgiliu D. Beregic
Health Physicist
Health Physics Department
Ontario Power Generation-Nuclear
1549 Victoria St East
Whitby, Ontario L1N 9E3
Tel: 905.430.2215 ext 3288
eMail: virgiliu.beregic at opg.com


D.W. Whillans, for Virgiliu Beregic
Health Physics Department  
Ontario Power Generation-Nuclear 



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