ML073620418

Request for Additional Information Control Room Habitability

ML073620418
Person / Time
Site:	Calvert Cliffs
Issue date:	01/08/2008
From:	Pickett D NRC/NRR/ADRO/DORL/LPLI-1
To:	Spina J Calvert Cliffs
Pickett D, NRR/DORL, 415-1364
References
TAC MD5928, TAC MD5929
Download: ML073620418 (4)

Text

January 8, 2008 Mr. James A. Spina, Vice President Calvert Cliffs Nuclear Power Plant, Inc.

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

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION RE: CONTROL ROOM HABITABILITY - CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 (TAC NOS. MD5928 AND MD5929)

Dear Mr. Spina:

By letter dated June 29, 2007, Calvert Cliffs Nuclear Power Plant, Inc. requested a license amendment to Renewed Operating License Nos. DPR-53 and DPR-69 to modify Technical Specification requirements for the control room emergency ventilation system in accordance with Technical Specification Task Force-448, Control Room Habitability, Revision 3, for the Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2.

The Nuclear Regulatory Commission (NRC) staff has reviewed the information provided and has determined that additional information is needed to complete its review. Enclosed is the NRC staffs request for additional information (RAI). As discussed with your staff, we understand that you intend to respond to this RAI within 60 days of receipt of this letter.

Please contact me at 301-415-1364 if you have any questions.

Sincerely,

/RA/

Douglas V. Pickett, Senior Project Manager Plant Licensing Branch I-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-317 and 50-318

Enclosure:

As stated cc w/encl: See next page

ML073620418 OFFICE PM/LPL1-1 LA:LPL1-1 BC/SCVB BC/LPL1-1 NAME DPickett SLittle RDennig MKowal DATE 1/03/08 1/03/08 1/8/08 1/8/08 Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2 cc:

Mr. Michael J. Wallace, President Ms. Kristen A. Burger, Esquire Constellation Energy Nuclear Group, LLC Maryland People's Counsel 750 East Pratt Street, 18th Floor 6 St. Paul Centre Baltimore, MD 21202 Suite 2102 Baltimore, MD 21202-1631 Mr. John M. Heffley, Senior Vice President and Chief Nuclear Officer Ms. Patricia T. Birnie, Esquire Constellation Energy Nuclear Generation Co-Director Group Maryland Safe Energy Coalition 111 Market Place P.O. Box 33111 Baltimore, MD 21202 Baltimore, MD 21218 President Mr. Roy Hickok Calvert County Board of NRC Technical Training Center Commissioners 5700 Brainerd Road 175 Main Street Chattanooga, TN 37411-4017 Prince Frederick, MD 20678 Mr. Louis S. Larragoite Mr. Carey Fleming, Esquire Manager - Nuclear Licensing Sr. Counsel - Nuclear Generation Constellation Energy Nuclear Generation Constellation Energy Nuclear Group, LLC Group 750 East Pratt Street, 17th floor 111 Market Place, 2nd Floor Baltimore, MD 21202 Baltimore, MD 21202 Mr. Jay S. Gaines Director, Licensing Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702 Resident Inspector U.S. Nuclear Regulatory Commission P.O. Box 287 St. Leonard, MD 20685 Mr. R. I. McLean, Manager Nuclear Programs Power Plant Research Program Maryland Department of Natural Resources 580 Taylor Avenue (B wing, 3rd floor)

Tawes State Office Building Annapolis, MD 21401 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406

REQUEST FOR ADDITIONAL INFORMATION CONTROL ROOM HABITABILITY TSTF-448 CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 DOCKET NOS. 50-317 AND 50-318 Technical Specification Task Force (TSTF) TSTF-448, Revision 3, Control Room Habitability, was developed for plants with pressurized control room envelopes (CREs). The Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2, have non-pressurized CREs. Note that the programs and manuals section of the standard technical specifications (STS), as modified by TSTF-448, Revision 3, paragraph (d) of Section 5.5.18, Control Room Envelope Habitability Program, specifies a differential pressure (dp) test to be conducted between performances of inleakage testing for the purpose of providing input to a periodic assessment of the CRE boundary. The NRC staff recognizes that non-pressurized CREs may not be able to conduct a dp test.

However, the staff believes that all plants requesting the adoption of TSTF-448 should include a method to collect data that will serve as input to a periodic assessment of the CRE boundary.

This position is supported by the technical analysis section of TSTF-448, Revision 3, on page 8 where an explanation of the basis for paragraph (d) is provided. Consequently, the NRC staff is requesting that you provide a method to collect data, and an explanation of how you intend to use it to periodically assess the integrity of your CRE boundary. The method should, to the extent practicable, provide information that can be used in a manner similar to the manner in which the information is to be used that is requested by paragraph (d) of Section 5.5.18 of the programs and manuals section of the STS as modified by TSTF-448, Revision 3.

Enclosure