ML070890406

Pilgrim, Response to NRC Request for Additional Information Regarding Response to Generic Letter 2003-001, Control Room Habitability

ML070890406
Person / Time
Site:	Pilgrim
Issue date:	03/22/2007
From:	Bethay S J Entergy Nuclear Operations
To:	Document Control Desk, NRC/NRR/ADRO
References
GL-03-001, TAC MB9840
Download: ML070890406 (4)

Text

En ter,ýEntergy Nuclear Operations, Inc.Pilgrim Nuclear Power Station 600 Rocky Hill Road Plymouth, MA 02360 Stephen J. Bethay Director, Nuclear Assessment March 22, 2007 U.S. Nuclear Regulatory Commission Attn: Document-Control Desk Washington, DC 20555

SUBJECT:

Entergy Nuclear Operations, Inc.Pilgrim Nuclear Power Station Docket 50-293 License No. DPR-35

REFERENCE:

Response to NRC Request for Additional Information Regarding Response to Generic Letter 2003-01 "Control Room Habitability" (TAC No. MB9840)1. NRC Letter "Pilgrim Nuclear Power Station -Request for Additional Information RE Response to Generic Letter 2003-01, Control Room Habitability" (TAC No. MB9840), dated 1/26/07 2. Entergy Letter 2.03.095, "Response to Generic Letter 2003-01, Control Room Habitability", dated 8/06/03 3. NRC Regulatory Guide 1.197, "Demonstrating Control Room SEnelope Integrity at Nuclear Power Reactors", dated May 2003 LETTER NUMBER: 2.07.015

Dear Sir or Madam:

This letter provides the response to the NRC request for additional information (Reference 1)regarding Entergy Nuclear Operations, Inc. (ENO), Pilgrim Nuclear Power Station's (PNPS)response to NRC GL 2003-01, 'Control Room Habitability," submitted to the NRC on August 6, 2003 (Reference 2). The additional information is provided in Attachment 1 to this letter.Attachment 2 contains the commitments made in this letter.If you have any questions or require additional information, please contact Mr. Bryan Ford, Licensing Manager, at (508) 830-8403.Sincerely, Director, Nuclear Safety Assura.n6e.

MJG/dI Entergy Nuclear Operations, Inc Pilgrim Nuclear Station Letter Number 2.07.015 Page 2

Attachment:

1. Entergy Response to NRC Request for Additional Information Regarding Response to Generic Letter 2003-01, "Control Room Habitability" (TAC No. MB9840)2. Summary of Commitments cc: Mr. James S. Kim, Project Manager Plant Licensing Branch I-1 Division of Operator Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission One White Flint North 4D9A 11555 Rockville Pike Rockville, MD 20852 Regional Administrator, Region 1 U.S. Nuclear Regulator Commission 475 Allendale Road King of Prussia, PA 19406 Senior Resident Inspector Pilgrim Nuclear Power Station Attachment 1 to letter 2.07.015 Entergy Response to NRC Request for Additional Information Regarding Response to Generic Letter 2003-01, "Control Room Habitability' (TAC No. MB9840)NRC RAI #1 Confirm that reactor control capability is maintained from either the control room or the alternate shutdown panel in the event of smoke (GL 2003-01, Item lb).Entergy Response Smoke inside of the main control room (MCR) return ductwork activates a smoke detector in the Main Control Room Environmental Control System (MCRECS) exhaust ductwork which in turn automatically places the system into the purge mode. The Control Room Operator can also manually place the MCRECS in the purge mode. This alignment supplies the MCR with 100% outside fresh air and sends the exhaust airflow outside of the building.During a fire or smoke event outside of the main control room that could compromise the Control Room Envelope (CRE) environment, if the fresh air intake draws smoke into the CRE the operators are directed by site procedures to place the Control Room ventilation in maximum recirculation mode and close one of the two control room supply dampers.If there is fire damage to the MCR, reactor control capability can be transferred to one of the fourteen Alternate Shutdown Panels (ASPs) located throughout the plant. These panels contain the controls and switches necessary to bring the plant to a Cold Shutdown condition.

The panels are designed such that MCR cables are bypassed when the panels are operated locally. Procedures provide instructions for shutting down and cooling the reactor from outside of the MCR.Based on the above, reactor control capability is still maintained in the event of smoke.NRC RAI #2 Explain how and at what frequency you confirm your control room envelope integrity and why this is adequate to demonstrate control room envelope integrity since you do not currently have a TS SR (GL 2003-01, Item 1 c).Entergy Response PNPS recently confirmed the CRE integrity through performance of a tracer gas test in December 2005. PNPS will submit a License Amendment Request (LAR) to adopt the Control Room Habitability Program as outlined in TSTF 448, rev. 3 by November 30, 2007.NRC RAI #3 Describe your plans to adopt TSTF -448 at Pilgrim, including a commitment to submit a license amendment request (LAR) based on TSTF -448.Enterqy Response PNPS will submit a License Amendment Request (LAR) to adopt TSTF-448 rev. 3 by November 30, 2007.Page 1 of 1 Attachment 2 to Letter 2.07.015 Summary of Commitments The following table identifies those actions committed to by Entergy in this document.Any other statements in this submittal are provided for information purposes and are not considered to be regulatory commitments.

List of Regulatory Commitments TYPE SCHEDULED (Check one) COMPLETION ONE-TIME CONTINUING DATE (If Required)ACTION COMPLIANCE COMMITMENT Submit a License Amendment Request (LAR) to adopt TSTF-448 rev. 3 X 11/30/07 Page 1 of 1