ML062410539

Response to Generic Letter 2003-01, Control Room Habitability

ML062410539
Person / Time
Site:	River Bend
Issue date:	09/18/2006
From:	Bhalchandra Vaidya NRC/NRR/ADRO/DORL/LPLIV
To:	Hinnenkamp P Entergy Operations
Vaidya B, NRR/DORL/LP4, 415-3308
References
GL-03-001, TAC MB9847
Download: ML062410539 (5)

Text

September 18, 2006 Mr. Paul D. Hinnenkamp Vice President - Operations Entergy Operations, Inc.

River Bend Station 5485 US Highway 61N St. Francisville, LA 70775

SUBJECT:

RIVER BEND STATION, UNIT 1 - RE: RESPONSE TO GENERIC LETTER 2003-01, CONTROL ROOM HABITABILITY (TAC NO. MB9847)

Dear Mr. Hinnenkamp:

The U.S. Nuclear Regulatory Commission (NRC) acknowledges the receipt of your responses, dated August 11, 2003 (Agencywide Documents and Access Management System (ADAMS)

Accession No. ML032270447), and January 25, 2005 (ADAMS Accession No. ML050310352),

to the NRC Generic Letter (GL) 2003-01, Control Room Habitability, dated June 12, 2003 (ADAMS Accession No. ML031620248).

The GL 2003-01 requested that you confirm that your control room (CR) meets its design bases (e.g., General Design Criteria (GDC) 1, 3, 4, 5, and 19, draft GDC, or principal design criteria),

with special attention to the following:

(1) GL 2003-01, Requested Information, Item 1a: Determination of the most limiting unfiltered and/or filtered inleakage into the CR and comparison to values used in your design bases for meeting CR operator dose limits from accidents.

(2) GL 2003-01, Requested Information, Item 1b: Determination that the most limiting unfiltered inleakage is incorporated into your hazardous chemical assessments.

(3) GL 2003-01, Requested Information, Item 1b: Determination that reactor control capability is maintained in the CR or at the alternate shutdown location in the event of smoke.

(4) GL 2003-01, Requested Information, Item 2: Provide information on any compensatory measures in use to demonstrate control room habitability (CRH),

and plans to retire them.

(5) GL 2003-01, Requested Information, Item 1c: Assessment of the Technical Specifications (TSs) to determine if they require verification of the integrity of the CR Envelope (CRE), including ongoing verification of the inleakage assumed in the design basis analysis for CRH, in light of the demonstrated unreliability of the P surveillance (a test to ensure positive differential pressure between CR and adjacent areas) alone to provide such verification.

P. Hinnenkamp As requested by GL 2003-01, you provided responses by letters referenced above. They are summarized below:

a. River Bend Stations (RBSs) CR is a positive-pressure-design structure.

b. The results of American Society of Testing Materials (ASTM) E741 tracer gas tests (ASTM, Standard Test Method, E2029-99, for Determining Air Change in a Single Zone by Means of a Tracer Gas Dilution) for RBSs CR indicate that the maximum tested unfiltered inleakage into the CRE, was 18 cubic feet per minute (cfm) which is less than the value of 300 cfm, the assumed value in the design-basis radiological analyses for CRH.

c. The maximum tested unfiltered inleakage for toxic chemical operation mode was 18 cfm which is less than the value of 300 cfm, the assumed value in your design-basis toxic chemical analysis.

d. The reactor control capability is maintained from either the CR or the alternate shutdown panel in the event of smoke.

e. RBSs TSs presently contain a surveillance requirement (SR), SR 3.7.2.4, to demonstrate that the ventilation system can maintain the CRE at a positive pressure relative to outside atmosphere.

f. RBS would submit a license amendment request (LAR) to include a new TS SR referencing an acceptable surveillance methodology to determine inleakage using ASTM E741 tracer gas or other suitable inleakage testing, within 6 months following the NRC approval of the traveler for TS Task Force (TSTF)-448, Control Room Habitability, or the publication of the notice of availability of Consolidated Line Item Improvement for TSTF-448 in the Federal Register.

The LAR will include the addition of a new TS SR to determine inleakage in accordance with the Control Room Integrity Program (CRIP), and the addition of a new TS Section 5.5, Programs and Manuals, that will specify the scope of the CRIP. The CRIP will rely on the use of ASTM E741 tracer gas or other suitable inleakge testing. RBS does not anticipate that modifications to the CRE will be required to demonstrate compliance with new SRs.

g. There are no compensatory measures in place at RBS, to demonstrate CRH.

h. RBSs Updated Safety Analysis Report requires compliance with the GDCs mentioned above, for CRH, except that TS Amendment No. 132 revised the dose limit requirements for the main CR following a design-basis accident from GDC 19 to those in Title 10 of the Code of Federal Regulations, Section 50.67.

P. Hinnenkamp Based on the information provided, the regulatory commitment made in your response letters referenced above, and the above discussion, the NRC staff finds the RBS responses to GL 2003-01 to be complete.

If you have any questions regarding this correspondence, please contact me.

Sincerely,

/RA/

Bhalchandra Vaidya, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-458 cc: See next page

ML062410539 OFFICE NRR/LPLIV/PM NRR/LPLIV/LA NRR/SCVB/BC NRR/PGCB/BC NRR/LPLIV/BC NAME BVaidya LFeizollahi RDennig CJackson DTerao DATE 9/11/06 9/11/06 9/18/06 9/18/06 9/18/06 River Bend Station cc:

Winston & Strawn LLP Director - Nuclear Safety 1700 K Street, N.W. Entergy Operations, Inc.

Washington, DC 20006 River Bend Station 5485 US Highway 61N Manager - Licensing St. Francisville, LA 70775 Entergy Operations, Inc.

River Bend Station Vice President - Operations Support 5485 US Highway 61N Entergy Operations, Inc.

St. Francisville, LA 70775 P. O. Box 31995 Jackson, MS 39286-1995 Senior Resident Inspector P. O. Box 1050 Attorney General St. Francisville, LA 70775 State of Louisiana P. O. Box 94095 President of West Feliciana Baton Rouge, LA 70804-9095 Police Jury P. O. Box 1921 Brian Almon St. Francisville, LA 70775 Public Utility Commission William B. Travis Building Regional Administrator, Region IV P. O. Box 13326 U.S. Nuclear Regulatory Commission 1701 North Congress Avenue 611 Ryan Plaza Drive, Suite 400 Austin, Texas 78701-3326 Arlington, TX 76011-8064 Richard Penrod, Senior Environmental Scientist Ms. H. Anne Plettinger State Liaison Officer 3456 Villa Rose Drive Office of Environmental Services Baton Rouge, LA 70806 Northwestern State University Russsell Hall, Room 201 Wise, Carter, Child & Caraway Natchitoches, LA 71497 P. O. Box 651 Jackson, MS 39205 Executive Vice President and Chief Operating Officer Entergy Operations, Inc.

P. O. Box 31995 Jackson, MS 39286-1995 General Manager - Plant Operations Entergy Operations, Inc.

River Bend Station 5485 US Highway 61N St. Francisville, LA 70775 May 2006