Letter Sequence Other |
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MONTHYEARML0618607302006-07-0505 July 2006
Proposed Technical Specifications Change Revision of Main Control Room and Emergency Switchgear Room Air Conditioning System Requirements
Project stage: Request
ML0706505242007-02-26026 February 2007
Proposed Technical Specifications Change Temporary 45-Day and 14-Day Allowed Outage Times to Replace Main Control Room and Emergency Switchgear Room Air Conditioning System Chilled Water Piping
Project stage: Request
ML0709600372007-04-0505 April 2007
Proposed Technical Specifications Change Re Temporary 45-Day and 14-Day Allowed Outage Times to Replace Main Control Room and Emergency Switchgear Room Air Conditioning System Chilled Water Piping
Project stage: Request
ML0711700902007-05-0303 May 2007
Request for Additional Information Regarding the Proposal to Revise Technical Specifications for Temporary 45-Day and 14-Day Allowed Outage Times (TAC Nos. MD46222 and MD4623)
Project stage: RAI
ML0713503562007-05-14014 May 2007
License Renewal Commitment, Pressurizer Surge Line Weld Inspection Plan Summary
Project stage: Other
ML0715502022007-05-31031 May 2007
Proposed Technical Specifications Change, Temporary 45-Day and 14-Day Allowed Outage Times to Replace Main Control Room and Emergency Switchgear Room Air Conditioning System Chilled Water Piping, Response to NRC RAI
Project stage: Request
ML0714902312007-05-31031 May 2007
Request for Additional Information Regarding the Proposal to Revise Technical Specification for Temporary 45-Day and 14-Day Allowed Outage Times to Replace Chilled Water Piping...(Tac Nos. MD4622 and MD4623)
Project stage: RAI
ML0717602122007-06-0505 June 2007
MCR &Esgr Chilled Water Piping Replacement
Project stage: Other
ML0718403872007-07-0303 July 2007
MCR and ESGR Chilled Water Piping Replacement (Risk Assessment RAI)
Project stage: RAI
ML0719401282007-07-12012 July 2007
MCR and ESGR Chilled Water A/C System Piping Replacement
Project stage: Other
ML0719303632007-07-12012 July 2007
MCR and ESGR e-mail Surry RAI Response for La
Project stage: RAI
ML0719701832007-07-13013 July 2007
Proposed Technical Specification Change, Temporary 45-Day and 14-Day Allowed Outage Times to Replace Main Control Room and Emergency Switchgear Room Air Conditioning System Chilled Water Piping Additional Information Backup Cooling
Project stage: Other
ML0720600222007-07-20020 July 2007
Temporary 45-Day and 14-Day Allowed Outage Times to Replace Main Control Room and Emergency Switchgear Room Air Conditioning System Chilled Water Piping, Response to Request for Additional Information
Project stage: Response to RAI
ML0726811712007-09-25025 September 2007
Proposed Technical Specifications Change Supplement Re Operable Definition Modification for Air Handling Units While in Temporary 45-Day Allowed Outage Times
Project stage: Request
ML0733212712007-11-28028 November 2007
Proposed Additional Technical Specifications Change, Operable Definition Modification for Air Handling Units While in Temporary 45-day Allowed Outage Times to Perform Required Surveillances
Project stage: Request
ML0801505442008-01-14014 January 2008
Revisions to Proposed Technical Specifications Changes, Temporary 45-day and 14-day Allowed Outage Times to Replace MCR and ESGR Air Conditioning System Chilled Water Piping and Operable Definition Modification to Perform
Project stage: Request
ML0802401202008-01-23023 January 2008
Tech Spec Pages for Amendments 258 and 257 Regarding Replacement of Main Control Room and Emergency Switchgear Room Air-Conditioning System Chilled Water Piping
Project stage: Other
ML0734802872008-01-23023 January 2008
Issuance of Amendments 258 and 257 Regarding Replacement of Main Control Room and Emergency Switchgear Room Air-Conditioning System Chilled Water Piping
Project stage: Approval
2007-06-05
[Table View] |
Similar Documents at Surry |
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Text
From:
Siva Lingam To:
gary.D.Miller@Dom.com Date:
6/5/2007 10:04:51 AM
Subject:
Surry 1 & 2 - MCR and ESGR Chilled Water Piping Replacement We have reviewed the Surry RAI response you provided via letter dated May 31, 2007 (Serial No. 07-0381), and need two additional pieces of information not provided.
- 1. In response to RAI #1, the licensee discussed the assumed equipment impacts to a loss of switchgear room cooling as failure of various electrical busses. However, the licensee did not identify the assumed impacts to a loss of control room cooling. The licensee stated that no alternate cooling was modeled (item D), so if control room cooling from the chillers is lost, does the PRA model simply assume core damage? If not, what is modeled as the plant impact?
- 2. In response to RAI #1, the licensee identified the acceptance criteria for chilled water and room coolers. However, it is not clear if the PRA model includes only the five chillers in the scope of the TS, or if the nonsafety chillers are also considered. The licensee stated that no alternate cooling was modeled (item D), which would imply that other chillers or cooling methods are not credited. A clarification as to the specific scope of the chilled water and MCR/ESGR cooling system PRA models, both for initiating events and mitigation, is requested.
Siva P. Lingam Project Manager (NRR/DORL/LPL2-1)
North Anna and Surry Nuclear Stations Location: O8-D5 Mail Stop: O8-G9 Telephone: 301-415-1564 Fax: 301-415-1222 E-mail address: spl@nrc.gov CC:
Andrew Howe Mail Envelope Properties (46656D83.481 : 13 : 35786)
Subject:
Surry 1 & 2 - MCR and ESGR Chilled Water Piping Replacement Creation Date 6/5/2007 10:04:51 AM From:
Siva Lingam Created By:
SPL@nrc.gov Recipients Action Date & Time Dom.com Transferred 6/5/2007 10:05:25 AM gary.D.Miller (gary.D.Miller@Dom.com) nrc.gov OWGWPO04.HQGWDO01 Delivered 6/5/2007 10:04:58 AM AJH1 CC (Andrew Howe)
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