ML100810266

Email from Michael Brown, NRR to Steven Garry, NRR (Update) TMI - Radiation Release in Containment Associated with Steam Generator Removal

ML100810266
Person / Time
Site:	Three Mile Island
Issue date:	11/30/2009
From:	Michael Brown NRC/NRR/DIRS/IOEB
To:	Steven Garry NRC/NRR/DIRS/IOEB
References
FOIA/PA-2010-0118
Download: ML100810266 (2)

Text

Page I of% 2 17rom: Brown, Michael Sent: Monday, November 30, 2009 3:20 PM To: Garry, Steven Cc: Pedersen, Roger; Conatser, Richard

Subject:

RE: (Update) TMI - RADIATION RELEASE INCONTAINMENT ASSOCIATED WITH STEAM GENERATOR REMOVAL This is what I received from the Resident at TMI "No, these calls are only to the residents. The calls are not 50.72, since thy are for lower threshold items that do not meet the criteria for official 50.72."

Let me know if you need anything else.

Mike From: Garry, Steven Sent: Monday, November 30, 2009 12:31 PM To: Brown, Michael Cc: Pedersen, Roger; Conatser, Richard

Subject:

FW: (Update) TMI - RADIATION RELEASE INCONTAINMENT ASSOCIATED WITH STEAM GENERATOR REMOVAL Wow!! The licensee has establishednew protocol to notify NRC and State within 60 minutes of any alarm.

Mike, do you know if this is a notification to the Resident, the Region, or via a 50.72?

Thanks Steve From: Brown, Michael Sent: Wednesday, November 25, 2009 1:35 PM To- Bettle, Jerome; Temple, Jeffrey; Garry, Steven; Boggi, Michael; Blumberg, Mark; Burnell, Scott

Subject:

(Update) TMI - RADIATION RELEASE IN CONTAINMENT ASSOCIATED WITH STEAM GENERATOR REMOVAL 2.) (Update) TMI - RADIATION RELEASE IN CONTAINMENT ASSOCIATED WITH STEAM GENERATOR REMOVAL A-OTSG has been transported to mausoleum; B-OTSG removal is in progress. Activities are in progress to move itto the shipping platform for removal from containment TMI experienced 4 additional alarms associated with AMS-4s (airborne radiation monitors). Local work areas were evacuated until the condition was understood and resolved. The containment building was maintained under negative pressure. Details of the 4 additional alarms are as follows:

1) 2219 /11/24 - One occurred on top of the B "D"ring 365 ft in Containment. Confirmatory sampling showed no airborne. Low flow alarm.

2) 2325/11/24 - Outside personnel hatch in auxiliary building area. Cause was radon iriversion.

3/4) 0445/0550/11/25- AMS alarmed (same machine) at B "D"ring 281 ft elevation, Sampling showed no airborne. Cause attributed to lifting of B steam generator resulting in elevated dose rates. No airborne identified.

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Page 2 of2 Workers were briefed about local evacuation situation from last night and the morning. The NRC has confirmed no airborne radiation issues existed; in addition, the NRC is reviewing containment evacuation procedures and policy today.

The licensee has established new protocol to notify NRC and State within 60 minutes of any alarm.

The State was notified of the conditions last night. None of these conditions was the result of airborne radioactivity. (Send update to TRGs for Containment Jerome Bettle_ Emergency Pr rdness. Jeffrey TemMple _He Physics;Steven GarryHurnan Performance: Michael BoggL_Dose Assessment; Mark Blumberg and Public AffairisL ScottBuimell)_._Assg ned.to Mike Brown.

Mike Brown Reactor Systems Engineer NRR/DIRS/IOEB email - mLchael~brown@nrc.gov ohone - 301-415-4096 (b)(6)

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