ML062400078
| ML062400078 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 09/20/2006 |
| From: | Jaffe D NRC/NRR/ADRO/DORL/LPLE |
| To: | Cobb D Detroit Edison |
| D. Jaffe, LPL3-1 | |
| References | |
| GL-03-001, TAC MB9804 | |
| Download: ML062400078 (4) | |
Text
September 20, 2006 Mr. Donald K. Cobb Assistant Vice President - Nuclear Generation Detroit Edison Company 6400 North Dixie Highway Newport, MI 48166
SUBJECT:
FERMI 2 - RESPONSE TO GENERIC LETTER 2003-01, CONTROL ROOM HABITABILITY (TAC NO. MB9804)
Dear Mr. Cobb:
The U.S. Nuclear Regulatory Commission (NRC) acknowledges the receipt of your responses to Generic Letter (GL) 2003-01, Control Room Habitability, dated August 11, 2003 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML032310500); December 8, 2003 (ADAMS Accession No. ML033510077); and May 25, 2005 (ADAMS Accession No. ML051530174) for the Fermi 2 facility. This letter provides the status of your response.
The GL requested that you confirm that the Fermi 2 control room meets applicable habitability regulatory requirements (e.g., General Design Criterion (GDC) 1, 3, 4, 5, and 19), with special attention to: (1) determination of the most limiting unfiltered and/or filtered inleakage into the control room envelope (CRE) and comparison to values used in your design bases for meeting control room operator dose limits from accidents (GL 2003-01, Item 1a); (2) determination that the most limiting unfiltered inleakage into the CRE is incorporated into your hazardous chemical assessments (GL 2003-01, Item 1b); and (3) determination that 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 GL further requested information on any compensatory measures in use to demonstrate control room habitability, and the plans to retire them (GL 2003-01, Item 1a).
In your letter dated May 25, 2005, you reported the results of the American Society for Testing Material Standard E741, Standard Test Method for Determining Air Change in a Single Zone by Means of a Tracer Gas Dilution, tracer gas tests for the Fermi 2 control room which is pressurized for accident mitigation. You determined that the maximum tested inleakage into the CRE was 59 cubic feet per minute (cfm) which is less than the value of 600 cfm assumed in the design-basis radiological analyses for control room habitability.
You indicated that based on your assessments of hazardous chemicals for both offsite stationary and mobile sources and for onsite hazardous chemical sources, no credible scenarios for toxic chemical release to impact control room habitability exists. Therefore, unfiltered inleakage is not incorporated in your design-basis hazardous chemical assessments.
You also indicated that reactor control capability is maintained from either the control room or the alternate shutdown panel in the event of smoke.
The GL further requested that you assess your technical specifications (TS) to determine if they verify the integrity of the CRE, including ongoing verification of the inleakage assumed in the
D. Cobb design-basis analysis for control room habitability, in light of the demonstrated inadequacy of a delta () P measurement to alone provide such verification (GL 2003-01, Item 1.c).
In your May 25, 2005, response you stated that License Amendment No. 162 revised your TSs to include adequate requirements for using acceptable methodology to verify the integrity of the CRE and the assumed unfiltered inleakage in the design-basis analysis. You also indicated that you intend to submit a license amendment to remove a license condition contained in License Amendment No. 162 following NRC approval of Technical Specification Task Force Traveler No. 448, Control Room Habitability.
The information you provided also supported the fact that there are no compensatory measures in place to demonstrate control room habitability. Furthermore, the information you provided also supported the conclusion that you are committed to meet the intent of the GDC regarding control room habitability.
Based on your responses, no additional actions are required and your response to GL 2003-01 is considered complete.
If you have any questions regarding this correspondence, please contact me at 301-415-1439.
Sincerely,
/RA/
David H. Jaffe, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-341 cc: See next page
D. Cobb design-basis analysis for control room habitability, in light of the demonstrated inadequacy of a delta () P measurement to alone provide such verification (GL 2003-01, Item 1.c).
In your May 25, 2005, response you stated that License Amendment No. 162 revised your TSs to include adequate requirements for using acceptable methodology to verify the integrity of the CRE and the assumed unfiltered inleakage in the design-basis analysis. You also indicated that you intend to submit a license amendment to remove a license condition contained in License Amendment No. 162 following NRC approval of Technical Specification Task Force Traveler No. 448, Control Room Habitability.
The information you provided also supported the fact that there are no compensatory measures in place to demonstrate control room habitability. Furthermore, the information you provided also supported the conclusion that you are committed to meet the intent of the GDC regarding control room habitability.
Based on your responses, no additional actions are required and your response to GL 2003-01 is considered complete.
If you have any questions regarding this correspondence, please contact me at 301-415-1439.
Sincerely,
/RA/
David H. Jaffe, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-341 cc: See next page DISTRIBUTION:
PUBLIC RidsOgcRp LPL3-1 r/f RidsAcrsAcwnMailCenter RidsNrrPMDJaffe RDennig, NRR RidsNrrLADClarke RidsRgn3MailCenter RidsNrrDorlDpr RidsNrrDorlLpl3-1 MWebb, NRR MBlumberg, NRR RidsNrrDprPgcb RidsNrrDssScvb Accession Number: ML062400078 OFFICE LPL3-1/PM LPL3-1/LA SCVB/BC PGCB/BC LPL3-1/BC(A)
NAME DJaffe:ca DClarke RDennig CJackson MMurphy DATE 9/15/06 9/14/06 9/15/06 9/18/06 9/20/06 OFFICIAL RECORD COPY
Fermi 2 cc:
David G. Pettinari Legal Department 688 WCB Detroit Edison Company 2000 2nd Avenue Supervisor - Electric Operators Detroit, MI 48226-1279 Michigan Public Service Commission 6545 Merchantile Way Michigan Department of Environmental P.O. Box 30221 Quality Lansing, MI 48909 Waste and Hazardous Materials Division Radiological Protection and Medical Waste Wayne County Emergency Management Section Division Nuclear Facilities Unit 10250 Middlebelt Road Constitution Hall, Lower-Level North Detroit, MI 48242 525 West Allegan Street P.O. Box 30241 Lansing, MI 48909-7741 U.S. Nuclear Regulatory Commission Resident Inspector's Office 6450 N Dixie Highway Newport, MI 48166 Mr. M. V. Yudasz, Jr., Director Monroe County Emergency Management Division 965 South Raisinville Road Monroe, MI 48161 Regional Administrator, Region III U.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4351 Ronald W. Gaston Manager, Nuclear Licensing Detroit Edison Company Fermi 2 - 200 TAC 6400 North Dixie Highway Newport, MI 48166