[ RadSafe ] Surveilance Frequency

henric.bolander at vattenfall.com henric.bolander at vattenfall.com
Wed Aug 10 08:51:59 CDT 2016

Hi John!

I am curious about why somebody want to do a survey inside the vault if there is no work/inspection planned there. It is not in line with ALARA philosophy. It would be sufficient to do the dose rate surveys outside for that kind of area. Perhaps it is of interest to take dose rate measurements to keep track of the decay? In that case one can use telescopic poles at a safe distance.

To answer your questions:
1. We have a fixed schedule for surveys and in this case it is performed twice a year. (For that kind of equipment it is stored in a locked building with controlled entrance).
2. No, dose rates are taken outside the fence or "building"

Best regards

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of JOHN.RICH at sargentlundy.com
Sent: Monday, August 01, 2016 8:02 PM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: [ RadSafe ] Surveilance Frequency


The question are,
1. How often  do you have somebody do a dose rate surveillance for stable areas such as old steam generator storage vaults, ISFSIs, etc.?
2. Do you do anything other than a walk outside the fence?

The reason for asking the question is that it was suggested that these stable facilities needed frequent exterior AND interior surveys.  The Regs don't seem to require active surveys after the stable facility is in place, sealed, an d stable. 

thx in advance  - -jmr

John Rich
Manager/Consultant 2
Nuclear Power Technologies
Sargent & Lundy
55 East Monroe Street | Chicago, IL 60603
office: 1-312-269-3768 | mobile: 1-561-676-8144 email :john.rich at sargentlundy.com _______________________________________________
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