ML082480671

Calvert Cliffs, Units 1 and 2, License Amendment Request: Replacement of the Trisodium Phosphate Buffer with a Sodium Tetraborate Buffer

ML082480671
Person / Time
Site:	Calvert Cliffs
Issue date:	08/27/2008
From:	Bauder D R Calvert Cliffs, Constellation Energy Group, Nuclear Generation Group
To:	Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML082480669	List: ML082480671 ML082480674 ML082480676 ML082480679
References
GL-04-002
Download: ML082480671 (2)

Text

Calvert Cliffs Nuclear Power Plant 0.*:.stellatio En rgy e..,.Nuclea r Generation GroupU.S.Nuclear Regulatory Com missio n Washington,DC205551650CalvertCl iffs ParkwayLusby,Maryland20657 August 27 ,2008 A TT ENT ION:

SUBJECT:

RE FERENCES: Document Contro l Desk Calvert Cliffs Nuclear Power P lantUnitNos.I&2;Docket Nos.50-317&50-318 License Amendment Request: Replacement of the Trisodi um Phosphate Bufferwitha Sodium Tetraborate Buffer (a)NRC Generic Letter 2004-02,"Potentia l Impact of Debris Blockage on Emergency Recirc ulation During Design Bas is AccidentsatP ressurizeWate r Reactors," dated Septem ber 13,2004 (b)LetterfromMr.J.A.

Spina (CCNPP)to Document Control Desk (NRC), da ted Ju ne18,2008,Req uest for Extension for Completion of Activit ies Related to Gene ric Letter 2004-02 Pursuantto10 CFR 50.90, Calvert Cl iffs Nuclear Power Plant (CCNPP)hereby reques tsana mend ment to Renewe d Operating License Nos.DPR-53 and DPR-69toc hange thecon tainment bu ffering agent fromtrisodium phosphate (TSP)tosodium tet raborate (STB).Th e purpose of t his changeisto minimize the potential forsump screen blockage concerns under post-loss-o f-coolant accident condit ions d uetoa po tential adverse chemical interaction between tr isodium phosphate and certain insulat ion materia ls used i n Containment.Thisreq uestisan integral part of CCNPPs responseto Generic Le tter 2004-02 (Referencea)and represents one of the remaining modificat ions requ ired to achieve full comp liance with the requirements of Gene ric Letter 2004-02 as documented in Reference (b).Ca lvert Cliffs Nu clear Power Pla nt has evaluated the proposed c hange in accorda nce with 10C FR 50.91(a)(l)usi ng the criteria of 10 CFR 50.92(c)andhas determined that this proposed change i nvolves no significant hazar ds cons iderations as describedinAttac hment (l).The proposed changestothe Tech nical Specificatio ns are shown in Attachment (2).Conforming cha ngestothe Technical Specification Baseswillbe made during imp lementation of the proposed change.The buffering agent calculation support ing the requested change is included as Attachment(3).Asdisc ussed in Reference (b), Calvert Cliffs N uclear Power Plant re quests approval of the proposed a mend mentassoo n as possible with implementation t o occur no laterthanJune1, 2009 (Un itI)andthe spring 2009 ref ueling outage forUnit2.

Document Control Desk August 2 7, 2008 Page 2 Shouldyouhave questions regarding this matter, please contact Mr.JayS.Gaines at (410)495-5219.STATEOF MARYLAND TO WIT: COUNTY OF CALVERT 1, Douglas R.Bauder, being duly sworn, state that 1 am Plant General Manager-Calvert Cliffs Nuclear Power Plant, Inc.(CCNPP), and thatIam duly authorized to executeandfilethis License Amendment Request on behalf of CCNPP.Tothebest of my knowledgeandbe lief, the statements containedinthis documentaretrueand correct.Tothe extent that these statementsarenot basedonmy personal knowledge, they are based upon information provided by other CCNPP employees and/or consultants.

Such informationhasbeen reviewed in accordance with companyprac.e adI believeittobe reliable.Subscribed and sworn beforeme,a Notary Publicinandforthe State of Maryland and County of Ca.lve,e.r ,thisday of QugtA'.:>t

,2008.WITt-lESSmyHandand Notarial Sea l: My Commission Expires: DRB/RDW/bjd

• • MIt L Hunter NOTARY CIIMIt.,..O,JDt/10 Attachments

(1)(2)(3)Analysis of the Proposed Changes Markup of Technical Specification Pages Mass of Sodium Tetraborate Decahydrate Buffer Required for Post-LOCA Containment Building Sump pH Control cc: D.V.Pickett, NRCS.J.Collins, NRC Resident Inspector, NRC S.Gray, DNR