Letter Sequence Draft RAI |
|---|
|
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MONTHYEARML0722100172007-08-0808 August 2007
D.C. Cook - Draft RAI on Containment Sump Amendment, GL 2004-02
Project stage: Draft RAI
ML0724807012007-09-0404 September 2007
D.C. Cook - Draft RAI on Proposed Amendment Containment Sump
Project stage: Draft RAI
ML0727506872007-09-21021 September 2007
Donald C. Cook, Units 1 and 2, Response to Request for Additional Information License Amendment Request to Revise Technical Specifications Associated with Generic Letter (GL) 2004-02
Project stage: Response to RAI
ML0727806052007-10-18018 October 2007
License Amendment, Issuance of Amendments Containment Sump Modifications Per Generic Letter 2004-02 (TAC Nos. MD5901 & MD5902)
Project stage: Approval
ML0729501002007-10-18018 October 2007
Technical Specifications, Issuance of Amendments Containment Sump Modifications Per Generic Letter 2004-02 (TAC Nos. MD5901 & MD5902)
Project stage: Approval
ML0800800492008-01-0404 January 2008
Technical Specifications, Correction of Amendment No. 282 Containment Sump Modifications Per Generic Letter 2004-02
Project stage: Other
ML0736100592008-01-0404 January 2008
Correction of Amendment No. 282 Containment Sump Modifications Per Generic Letter 2004-02 (Tac No. MD5902)
Project stage: Other
2007-09-21
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[Table view] |
Text
From: Peter Tam To: Joe Waters; Michael Scarpello; Sue Simpson Date: 09/04/2007 11:56:22 AM
Subject:
D.C. Cook - Draft RAI on Proposed Amendment re. Containmetn Sump (TAC MD5901, 2)
Joe:
Several branches in the Office of NRR are reviewing your 6/27/07 application for amendment.
Previously we had transmitted draft questions to you from ourTechnical Specifications Branch, and we held a conference call to discuss those draft question on 8/10/07. I have now received draft questions from the remaining 3 review branches as follows:
Containment and Ventilation Branch (Rich Lobel)
Your 90-day response to Generic letter 2004-02 (Attachment 1 Response to RAI 2(b) Item 4) states that debris interceptors will be installed on the approach area to the strainer section in the annulus and the area of the inlet nozzles for the containment wide range level instruments in addition to the drain paths from the CEQ fan rooms and the existing flow holes from the loop compartment to the annulus. Why is it not necessary to include the approach area to the strainer section in the annulus and the area of the inlet nozzles for the containment wide range level instruments in the technical specifications to ensure that the strainers are unobstructed and in good condition?
Safety Issues Resolution Branch (Ralph Architzel)
Section 3.1 of your application discusses addition of new post-accident monitoring instrumentation to the Technical Specification Table 3.3.3-1 to add a new function Containment Recirculation Sump Water Level. Section 4.1 of the application notes the need for such instrumentation derives from Regulatory Guide 1.97 when there is a need for operators to take specified manual actions for which no automatic control is provided and that are required for the safety system to accomplish its safety function. Section 4.1 further notes that the level setting provides advance warning of potential air entrainment due to vortexing; which is more limiting for the Cook ECCS and CTS pumps than the loss of net positive suction head.
(a) Describe the limiting level which these instruments protect against vortexing, including margins in level related to time for the operator to take actions.
(b) Describe the specified manual actions that the operator will take upon actuation of this level alarm provided by the instruments, including how these actions maintain the safety functions of the CNP ECCS and CTS pumps.
Instrumentation and Controls Branch (Pong Chung, Barry Marcus)
(1) Specify if the two new recirculation sump level instruments (NLI-300 and NLI-301) are replacements or additions to the containment recirculation sump water level instrumentation included in your commitment to Regulatory Guide (RG) 1.97 dated October 15, 1988. If they are replacements, then specify the differences between the new and the old instruments.
(2) Provide the range of the new instrumentation and confirm that each Type A criteria of RG 1.97 is met.
This e-mail aims solely to prepare you and others for a proposed conference call. This e-mail does not formally convey an NRC staff position, and does not formally request for additional information. During the conference call, we will discuss the options of dispositioning of these draft questions.
Peter S. Tam, Senior Project Manager
Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation e-mail: pst@nrc.gov Tel.: 301-415-1451 CC: Barry Marcus; Matthew Hamm; Pong Chung; Ralph Architzel; Richard Lobel Mail Envelope Properties (46DD8026.F82 : 12 : 35330)
Subject:
D.C. Cook - Draft RAI on Proposed Amendment re. Containmetn Sump (TAC MD5901, 2)
Creation Date 09/04/2007 11:56:22 AM From: Peter Tam Created By: PST@nrc.gov Recipients Action Date & Time aep.com Transferred 09/04/2007 4:33:38 PM jrwaters (Joe Waters) mkscarpello (Michael Scarpello) sdsimpson (Sue Simpson) nrc.gov OWGWPO01.HQGWDO01 Delivered 09/04/2007 4:33:24 PM REA CC (Ralph Architzel) Opened 09/04/2007 4:33:39 PM nrc.gov OWGWPO02.HQGWDO01 Delivered 09/04/2007 4:33:24 PM MEH1 CC (Matthew Hamm) Opened 09/04/2007 5:19:29 PM nrc.gov OWGWPO03.HQGWDO01 Delivered 09/04/2007 4:33:24 PM PCC3 CC (Pong Chung) Opened 09/04/2007 4:33:30 PM nrc.gov TWGWPO01.HQGWDO01 Delivered 09/04/2007 4:33:24 PM BSM CC (Barry Marcus)
RML CC (Richard Lobel) Opened 09/04/2007 4:33:38 PM Post Office Delivered Route aep.com OWGWPO01.HQGWDO01 09/04/2007 4:33:24 PM nrc.gov OWGWPO02.HQGWDO01 09/04/2007 4:33:24 PM
nrc.gov OWGWPO03.HQGWDO01 09/04/2007 4:33:24 PM nrc.gov TWGWPO01.HQGWDO01 09/04/2007 4:33:24 PM nrc.gov Files Size Date & Time MESSAGE 4789 09/04/2007 11:56:22 AM Options Auto Delete: No Expiration Date: None Notify Recipients: Yes Priority: Standard ReplyRequested: No Return Notification: None Concealed
Subject:
No Security: Standard To Be Delivered: Immediate Status Tracking: Delivered & Opened
