Palo Verde does not use a criticality alarm during dry cask storage campaigns

From: [email protected] [mailto:[email protected]] On Behalf Of 
Creamer, Charles E
Sent: Monday, February 20, 2012 8:36 AM
To: [email protected]
Subject: Powernet: Dry Cask Criticality Alarm

Browns Ferry is currently having a campaign of dry cask operations.  Last week 
a power transient caused our RMS-3 to alarm.  The refuel floor was 
appropriately evacuated until the cause could be determined and surveys 
performed.   We have gotten an alarm in the past during electrical board 
switching and need to find away to prevent the false alarm.  The vendor gave us 
a few suggestion on modifying the detector and set up but I am hesitant to try 
it since it is a piece of safety equipment.

I have a couple questions:

When  performing Dry cask do you use a criticality alarm?

If you are using the RMS-3 do you ever get false alarms due to power 
transients?  If so, what have you done to prevent it?

Is there a better alternative to the RMS-3?


Thanks in advance for your time
  ___________________________
        Chuck Creamer
           Charles E. Creamer
        Health Physicist
        Tennessee Valley Authority
        Browns Ferry Nuclear Plant
        P.O. Box 2000 (Mail Stop NAB-1G-BFN)
        Decatur, Al. 35609-2000
        Phone: 256-729-2983
        Fax:  256-729-3101
        Pager: 1-800-323-4853, pin 30-053
          mailto:[email protected]

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