ML082671192

Draft Request for Additional Information, Proposed Amendment to TS 3.5.1, ECCS

ML082671192
Person / Time
Site:	Monticello
Issue date:	09/23/2008
From:	Tam P Plant Licensing Branch III
To:	Blake T, Loeffler R Nuclear Management Co
Tam P
References
TAC MD9170
Download: ML082671192 (2)

Text

Accession No. ML082671192 From:

Peter Tam Sent:

Tuesday, September 23, 2008 4:11 PM To:

'Blake, Tim M.'; Loeffler, Richard A.

Cc:

Frank Orr

Subject:

Draft RAI re. proposed amendment to TS 3.5.1, ECCS (TAC MD9170)

Rick:

We are reviewing your 6/26/08 application for amendment. Our reviewer, Frank Orr, has the following draft RAI question that we would like to discuss with you in a conference call.

Your application identifies the worst-case event as a recirculation line break event. For this event, protection systems appear to respond with acceptable consequences. Please discuss a feedwater line break event and protection systems response, showing that the consequences are not greater than those of the recirculation line break event. In a feedwater line break event, is the RPS qualified for the environment? Does the operator have to take actions? If so, show that the operator can act on a timely basis to depressurize the reactor vessel so that other mitigating equipment can function.

The sole purpose of this e-mail is to prepare you and others for the proposed conference call. This e-mail does not formally request for additional information, and does not convey a formal NRC staff position. With or without the requested conference call, we plan to formally issue the above draft RAI in final form around 10/17/08.

Peter S. Tam, Senior Project Manager Plant Licensing Branch 3-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Tel. 301-415-1451 E-mail Properties Mail Envelope Properties ()

Subject:

Draft RAI re. proposed amendment to TS 3.5.1, ECCS (TAC MD9170)

Sent Date: 09/23/2008 3:42:48 PM Received Date: 09/23/2008 4:10:00 PM From: Peter Tam Created By: Peter.Tam@nrc.gov Recipients:

Tim.Blake@xenuclear.com ('Blake, Tim M.')

Tracking Status: None Richard.Loeffler@xenuclear.com (Loeffler, Richard A.)

Tracking Status: None Frank.Orr@nrc.gov (Frank Orr)

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 7628 09/23/2008 Options Expiration Date:

Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: