No. North Anna does not use tamper proof seals on RP Instruments.

Barbara J. Thompson
North Anna Power Station
1022 Haley Drive
Mineral, Va 23117
Superintendent Health Physics Technical Services
[email protected]
Phone:  540-894-2638



From: Powernet [mailto:[email protected]] On Behalf Of Tom Meek 
via Powernet
Sent: Tuesday, April 09, 2019 3:26 PM
To: [email protected]
Cc: Tom Meek; 'Mark Tursa'; Jim VanLooven
Subject: [External] [Powernet] RP field instrument tamper seals

I have a question regarding tamper resistant seals for calibration on RP 
meters.  A QA audit made a SFR (supplier finding report) at an instrument 
calibration facility stating vendor should be placing these seals on our RP 
meters.

The cited standard is ANSI Z540:1994 Section 11.5, but after some discussion we 
agreed that this only applies to lab standards.  He also cited ISO 17025:2017 
Section 6.4.12 which states "the laboratory shall take practical measures to 
prevent unintended adjustments of equipment from invalidating results."  The 
auditor said that industry interprets this as requiring tamper seals, but also 
said that complying with the ISO standard was a matter of lab certification 
only (not a regulatory requirement).

Does any site require tamper resistant seals on RP field instruments?  Yes    No

If yes how do you handle routine battery and/or desiccant replacement?

What do you do if a seal is found broken or missing.  In short, would the event 
be entered into the corrective action system?

Do you rely on your source check and zero check of the instrument to "validate" 
its calibration in lieu of the tamper seal?

Thanks in advance
Tom Meek, CHP

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