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RE: Direct Reading Dosimeters - Leak Checks, Good Practices

John,

 I know the old basis we used to have was USNRC Reg Guide 8.4 which
gave a position of testing for cal/response and leak rate Prior to use,
After subjection to possible damage, and at testing intervals of
3 months if the dosimeter was used for the primary method of
monitoring or 6 months if used to supplement the primary method.
The Reg Guide was based on the ANSI 13.5-1972 performance standards.

     Marc

> Marc Lanni  <mailto: mlanni@entergy.com>
> Grand Gulf Nuclear Station - Health Physicist
> Entergy Operations
> mlanni@entergy.com
> Office:	(601) 437-6572
> Fax:         (601) 437-6573 
> Pager:	(601) 930-8904
> 


-----Original Message-----
From: CHASE John -NUCLEAR [mailto:john.chase@ontariopowergeneration.com]
Sent: Thursday, April 20, 2000 8:17 AM
To: Multiple recipients of list
Subject: Direct Reading Dosimeters - Leak Checks, Good Practices


1.	A question has come up in our stations about how often to perform
leak checks on DRDs. The manufacturer says they should be done monthly, but
industry practice is every 6 months or every year, after the initial leak
check. Does anyone know the basis of the manufacturer's recommendation for
monthly checks, or the basis for less frequent checks.
2.	Does anyone have references/information on good programs for
managing DRDs?

Thanks in advance

John Chase
Sr. Specialist, Dosimetry
Radiological Protection Division
Ontario Power Generation Nuclear
(905) 430-2215, ext. 3242

john.chase@ontariopowergeneration.com
<mailto:john.chase@ontariopowergeneration.com> 


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