ML062500055
| ML062500055 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 10/11/2006 |
| From: | Mozafari B NRC/NRR/ADRO/DORL/LPLII-2 |
| To: | Walt T Carolina Power & Light Co |
| Mozafari B, NRR/ADRO/DORL, 415-2020 | |
| References | |
| GL-03-001, TAC MB9848 | |
| Download: ML062500055 (4) | |
Text
October 11, 2006Mr. Thomas D. Walt, Vice PresidentCarolina Power & Light Company H. B. Robinson Steam Electric Plant Unit No. 2 3581 West Entrance Road Hartsville, South Carolina 29550
SUBJECT:
H. B. ROBINSON STEAM ELECTRIC PLANT UNIT 2 - NRC RECEIPT OFRESPONSE TO GENERIC LETTER 2003-01, "CONTROL ROOM HABITABILITY" (TAC NO. MB9848)
Dear Mr. Walt:
The Nuclear Regulatory Commission (NRC) acknowledges the receipt of your response toGeneric Letter (GL) 2003-01, "Control Room Habitability," in a letter dated December 08, 2003(Agencywide Document and Access Management System (ADAMS) Accession No.
ML033440212). This letter provides a status of your response and describes any additional information that may be necessary to consider your response to GL 2003-01 complete. GL 2003-01 requested that you confirm that your control room meet its design bases(e.g., General Design Criteria (GDC) 1, 3, 4, 5, and 19, draft GDCs, or principal design criteria),
with special attention to: (1) Determination of the most limiting unfiltered and/or filtered inleakage into the control room and comparison to values used in your design bases for meeting control room operator dose limits from accidents (Item 1.a), (2) Determination that themost limiting unfiltered inleakage is incorporated into your hazardous chemical assessments, and (3) Determination that reactor control capability is maintained in the control room or at thealternate shutdown location in the event of smoke (Item 1.b). The GL further requested information on any compensatory measures in use to demonstrate control room habitability(CRH), and plans to retire them (Item 2).Your response referenced an April 10, 2003, letter (ADAMS Accession No. ML031050027) inwhich you reported the results of ASTM E741(American Society for Testing Materials, Standard Test Method for Determining Air Change in a Single Zone by Means of a Tracer Gas Dilution)tracer gas tests for the pressurized H. B. Robinson Steam Electric Plant, Unit No. 2 control room. You determined that the maximum tested value for inleakage into the control room envelope (CRE) was 141 (+/- 5) cubic feet per minute (cfm) for Mode 1; 64 (+/- 15) cfm for Mode 2; 30 (+/- 14) cfm for Mode 3. These values were all less than the values of 160 cfm loss-of-coolant accident (LOCA)-Mode 1) and 290 cfm (non-LOCA-Mode 1); 160 cfm (Mode 2);
and 90 cfm (Mode 3) assumed in the design basis radiological dose analyses for CRH. In your April 10, 2003, letter, you also reported that the maximum tested inleakage value for thehazardous chemical recirculation mode was 93 (+/-3) cfm, which is less than the total intake flow of 570 cfm assumed in your design basis hazardous chemical analysis. You indicated that reactor control capability is maintained from either the control room or the alternate shutdownlocation in the event of smoke.
T. D. Walt-2-The GL further requested that you assess your technical specifications to determine if theyverify the integrity of the CRE, including ongoing verification of the inleakage assumed in the design basis analysis for control room habitability, and in light of the demonstrated inadequacyof a delta () P (pressure change) measurement to alone provide such verification (Item 1.c). As permitted by the GL, you provided a schedule for revising the surveillance requirement in thetechnical specification (TS) to reference an acceptable surveillance methodology. In your December 9, 2003, response you indicated that you will submit a license amendment request torevise your TS utilizing Technical Specification Task Force (TSTF)Traveler TSTF-448 within6 months of the approval of TSTF-448 by the NRC.The information you provided also supported the fact that all compensatory measures neededto demonstrate CRH have been retired following the July 11, 2006, NRC approval of your LOCAAlternate Source Term submittal (ADAMS Accession No. ML061910159).The information you provided also supported the fact that there are no compensatory measuresin place to demonstrate control room habitability. The information you provided also supported the conclusion that your are committed to meetthe intent of the GDC regarding control room habitability which is documented in your SafetyEvaluation.Your commitment to submit a license amendment request based on TSTF-448, following ourformal review and approval, is acceptable for purposes of closing out your response to GL 2003-01. The NRC staff will monitor submittal of the license amendment request andinteract with you as necessary during the amendment process.If you have any questions regarding this correspondence, please contact me.Sincerely,/RA/Brenda Mozafari, Senior Project ManagerPlant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket No. 50-261cc: See next page
ML061910159).The information you provided also supported the fact that there are no compensatory measuresin place to demonstrate control room habitability. The information you provided also supported the conclusion that your are committed to meetthe intent of the GDC regarding control room habitability which is documented in your SafetyEvaluation.Your commitment to submit a license amendment request based on TSTF-448, following ourformal review and approval, is acceptable for purposes of closing out your response to GL 2003-01. The NRC staff will monitor submittal of the license amendment request andinteract with you as necessary during the amendment process.If you have any questions regarding this correspondence, please contact me.Sincerely, /RA/Brenda Mozafari, Senior Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket No. 50-261cc: See next pageDISTRIBUTION:PUBLICLPL2-2 r/fJ. Robinson, NRRRidsNrrDorlLpl2-2RidsNrrLACSolaRidsNrrDssScvb RidsNrrPMBMozafariRidsOgcRpRidsNrrDprPgcb RidsAcrsAcnwMailCenterRidsRgn2MailCenterAccession Number: ML062500055OFFICELPL2-2/PMLPL2-2/ LASCVB/BCPGCB/BCLPL2-2/BC(A)NAMEBMozafariRSolaRDennigCJacksonLRaghavanDATE10/4/0610/4/0610/5/0610/6/0610/11/06 Mr. T. D. WaltH. B. Robinson Steam Electric Plant,Carolina Power & Light Company Unit No. 2 cc:
David T. ConleyAssociate General Counsel II - Legal Department Progress Energy Service Company, LLC Post Office Box 1551 Raleigh, North Carolina 27602-1551Ms. Margaret A. ForceAssistant Attorney General State of North Carolina Post Office Box 629 Raleigh, North Carolina 27602U. S. Nuclear Regulatory CommissionResident Inspector's Office H. B. Robinson Steam Electric Plant 2112 Old Camden Road Hartsville, South Carolina 29550Mr. Dan StoddardPlant General Manager H. B. Robinson Steam Electric Plant, Unit No. 2 Carolina Power & Light Company 3581 West Entrance Road Hartsville, South Carolina 29550Mr. William G. NollDirector of Site Operations H. B. Robinson Steam Electric Plant, Unit No. 2 Carolina Power & Light Company 3581 West Entrance Road Hartsville, South Carolina 29550Public Service CommissionState of South Carolina Post Office Drawer 11649 Columbia, South Carolina 29211J. F. LucasManager - Support Services - Nuclear H. B. Robinson Steam Electric Plant, Unit No. 2 Carolina Power & Light Company 3581 West Entrance Road Hartsville, South Carolina 29550Mr. C. T. BaucomSupervisor, Licensing/Regulatory Programs H. B. Robinson Steam Electric Plant, Unit No. 2 Carolina Power & Light Company 3581 West Entrance Road Hartsville, South Carolina 29550Ms. Beverly Hall, Section ChiefN.C. Department of Environment and Natural Resources Division of Radiation Protection 3825 Barrett Dr.
Raleigh, North Carolina 27609-7721Mr. Robert P. GruberExecutive Director Public Staff - NCUC 4326 Mail Service Center Raleigh, North Carolina 27699-4326Mr. Henry H. Porter, Assistant DirectorSouth Carolina Department of Health Bureau of Land & Waste Management 2600 Bull Street Columbia, South Carolina 29201Mr. Chris L. BurtonManager Performance Evaluation and Regulatory Affairs PEB 7 Progress Energy Post Office Box 1551 Raleigh, North Carolina 27602-1551Mr. John H. O'Neill, Jr.Shaw, Pittman, Potts, & Trowbridge 2300 N Street NW.
Washington, DC 20037-1128Mr. J. W. Moyer, Vice PresidentCarolina Power & Light Company H. B. Robinson Steam Electric Plant Unit No. 2 3581 West Entrance Road Hartsville, South Carolina 29550-0790