ML062610246

Request for Additional Information Response to Generic Letter 2003-01, Control Room Habitability (TAC Nos. MB9784 and MB9785)

ML062610246
Person / Time
Site:	Calvert Cliffs
Issue date:	12/27/2006
From:	Milano P NRC/NRR/ADRO/DORL/LPLA
To:	Spina J Calvert Cliffs
Milano P, NRR/DORL/LPLA, 415-1457
References
GL-03-001, TAC MB9784, TAC MB9785
Download: ML062610246 (4)

Text

December 27, 2006Mr. James A. Spina, Vice PresidentCalvert Cliffs Nuclear Power Plant, Inc.

Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702

SUBJECT:

CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 -REQUEST FOR ADDITIONAL INFORMATION RE: RESPONSE TO GENERIC LETTER 2003-01, "CONTROL ROOM HABITABILITY" (TAC NOS. MB9784 AND MB9785)

Dear Mr. Spina:

By letters dated December 5, 2003, and November 23, 2004 (Agencywide Documents Accessand Management System (ADAMS) Accession Nos. ML033440342 and ML043380215, respectively), Calvert Cliffs Nuclear Power Plant, Inc., responded to Nuclear Regulatory Commission (NRC) Generic Letter (GL) 2003-01, "Control Room Habitability," for Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2 (Calvert Cliffs). In the GL, the NRC staff had requested that licensees confirm that their control rooms meet the design bases (e.g. General Design Criterion (GDC) 1, 3, 4, 5, and 19, draft GDC, or principal design criteria), with special attention to determining that: (1) 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 (GL 2003-01, Item 1a); (2) the most limiting unfiltered inleakage is incorporated into your hazardous chemical assessments (GL 2003-01, Item 1b); and, (3) the reactor control capability is maintained in the control room or at the alternate shutdown location in the event of smoke (GL 2003-01, Item 1b). The NRC staff had further requested information on any compensatory measures in use to demonstrate control room habitability, and the plans to retire them (GL 2003-01, Item 2).In GL 2003-01, the NRC staff further requested that licensees assess their TechnicalSpecifications (TSs) to determine if the TSs verify the integrity of the control room envelope (CRE), including ongoing verification of the inleakage assumed in the design basis analysis for control room habitability, and in light of the demonstrated inadequacy of a delta pressure (P)measurement to alone provide such verification (GL 2003-01, Item 1c).In your December 5, 2003, response, you stated that you do not currently have a TSsurveillance requirement for CRE integrity. You further stated that you have established a comprehensive administrative control program for CRE integrity based on Regulatory Guides and Nuclear Energy Institute documents. In your response, you did not mention any plans to adopt TS Task Force (TSTF) Change Traveler TSTF-448, "Control Room Habitability."The NRC staff notes that changes to TSs as proposed in TSTF-448 will be an industryaccepted standard to address the potential for excessive inleakage that can increase the radiation exposure to the operators. The staff believes that TSTF-448 will enhance regulatory stability and uniform enforcement. Therefore, the NRC staff requests that you describe your J. Spina- 2 -plans to adopt TSTF-448 at Calvert Cliffs. In the event that you decide not to submit an LAR toadopt applicable sections of TSTF-448 into your TSs, the NRC staff requests that you provide an acceptable alternative that will ensure the Calvert Cliffs CRE will be in compliance with the regulations.This request for additional information was discussed with your staff on December 19, 2006,and it was agreed that your response would be provided within 60 days from the date of this letter.If you have any questions, please contact me at 301-415-1457.Sincerely,/RA/Patrick Milano, Senior Project ManagerPlant Licensing Branch I-1 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket Nos. 50-317 and 50-318 cc: See next page

ML062610246OFFICELPLI-1/PMLPLI-1/LAACVB/BCPGCB/BCLPLI-1/BCNAMEPMilanoSLittleRDennigCJacksonRLauferDATE12/22/0612/22/0609/07/0612/27/06 12/27/06 Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2 cc:

PresidentCalvert County Board of Commissioners 175 Main Street Prince Frederick, MD 20678Mr. Carey Fleming, EsquireSr. Counsel - Nuclear Generation Constellation Generation Group, LLC 750 East Pratt Street, 17 th floorBaltimore, MD 21202Mr. Jay S. GainesDirector, Licensing Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702Resident InspectorU.S. Nuclear Regulatory Commission P.O. Box 287 St. Leonard, MD 20685Mr. R. I. McLean, ManagerNuclear Programs Power Plant Research Program Maryland Department of Natural Resources 580 Taylor Avenue (B wing, 3rd floor)

Tawes State Office Building Annapolis, MD 21401Regional Administrator, Region IU.S. Nuclear Regulatory Commission

475 Allendale Road King of Prussia, PA 19406Ms. Kristen A. Burger, EsquireMaryland People's Counsel 6 St. Paul Centre Suite 2102 Baltimore, MD 21202-1631Ms. Patricia T. Birnie, EsquireCo-Director Maryland Safe Energy Coalition P.O. Box 33111 Baltimore, MD 21218Mr. Roy HickokNRC Technical Training Center 5700 Brainerd Road Chattanooga, TN 37411-4017