ML080280107

Request for Additional Information Related to Control Room Habitability

ML080280107
Person / Time
Site:	Kewaunee
Issue date:	01/30/2008
From:	Milano P NRC/NRR/ADRO/DORL/LPLIII-1
To:	Christian D Nuclear Management Co
Milano P, NRR/DORL/LPLIII-1, 415-1457
References
TAC MD6773
Download: ML080280107 (6)

Text

January 30, 2008 Mr. David A. Christian President and Chief Nuclear Officer Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711

SUBJECT:

KEWAUNEE POWER STATION - REQUEST FOR ADDITIONAL INFORMATION RELATED TO CONTROL ROOM HABITABILITY (TAC NO. MD6773)

Dear Mr. Christian:

By letter to the Nuclear Regulatory Commission (NRC) dated September 14, 2007, Dominion Energy Kewaunee, Inc. submitted a request for an amendment to the technical specifications (TSs) associated with the control room post-accident recirculation system at Kewaunee Power Station. The proposed amendment would in part incorporate changes described in TS Task Force (TSTF) Change Traveler TSTF-448-A, Revision 3, Control Room Habitability.

The NRC staff is reviewing your submittal and has determined that additional information is needed to complete its review. The specific information requested is addressed in the enclosure to this letter.

This request for additional information was discussed with members of your staff, and it was agreed that a response would be provided within 60 days of the date of this letter. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-1457.

Sincerely,

/RA/

Patrick D. Milano, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-305

Enclosure:

Request for Additional Information cc w/encl: See next page

Mr. David A. Christian President and Chief Nuclear Officer Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711

SUBJECT:

KEWAUNEE POWER STATION - REQUEST FOR ADDITIONAL INFORMATION RELATED TO CONTROL ROOM HABITABILITY (TAC NO. MD6773)

Dear Mr. Christian:

By letter to the Nuclear Regulatory Commission (NRC) dated September 14, 2007, Dominion Energy Kewaunee, Inc. submitted a request for an amendment to the technical specifications (TSs) associated with the control room post-accident recirculation system at Kewaunee Power Station. The proposed amendment would in part incorporate changes described in TS Task Force (TSTF) Change Traveler TSTF-448-A, Revision 3, Control Room Habitability.

The NRC staff is reviewing your submittal and has determined that additional information is needed to complete its review. The specific information requested is addressed in the enclosure to this letter.

This request for additional information was discussed with members of your staff, and it was agreed that a response would be provided within 60 days of the date of this letter. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-1457.

Sincerely,

/RA/

Patrick D. Milano, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-305

Enclosure:

Request for Additional Information cc w/encl: See next page DISTRIBUTION:

PUBLIC RidsNrrLATHarris H. Walker, NRR RidsAcrsAcnwMailCenter LPL3-1 R/F RidsNrrDeEicb P. Chung, NRR RidsOgcRp RidsNrrDorlLpl3-1 RidsNrrDssScvb RidsNrrDorlDpr RidRgn3MailCenter RidsNrrPMPMilano J. Bettle, NRR RidsNrrLABTully ADAMS Accession Number: ML080280107 OFFICE LPL3-1/PM LPL3-1/LA LPL3-1/LA DE/EICB/BC DSS/SCVB/BC LPL3-1/(A)BC NAME PMilano BTully THarris WKemper RDennig JCushing for PMilano DATE 01/23/08 01/ 30/08 01/ 31/08 01/17/08 01/ 25/08 01/30/08 OFFICIAL RECORD COPY

Kewaunee Power Station cc:

Resident Inspectors Office Ms. Lillian M. Cuoco, Esq.

U.S. Nuclear Regulatory Commission Senior Counsel N490 Hwy 42 Dominion Resources Services, Inc.

Kewaunee, WI 54216-9510 120 Tredegar Street Riverside 2 Mr. Chris L. Funderburk Richmond, VA 23219 Director, Nuclear Licensing and Operations Support Mr. Stephen E. Scace Innsbrook Technical Center Site Vice President 5000 Dominion Boulevard Dominion Energy Kewaunee, Inc.

Glen Allen, VA 23060-6711 Kewaunee Power Station N 490 Highway 42 Mr. Thomas L. Breene Kewaunee, WI 54216 Dominon Energy Kewaunee, Inc.

Kewaunee Power Station Mr. Thomas J. Webb, Director N490 Highway 42 Nuclear Safety & Licensing Kewaunee, WI 54216 Dominion Energy Kewaunee, Inc.

Kewaunee Power Station N 490 Highway 42 Kewaunee, WI 54216

REQUEST FOR ADDITIONAL INFORMATION KEWAUNEE POWER STATION DOCKET NO. 50-305 By letter dated September 14, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML072620144), Dominion Energy Kewaunee Inc. (DEK) submitted a request for an amendment to the technical specifications (TSs) associated with the control room post-accident recirculation system at Kewaunee Power Station (KPS). In reviewing the application, the Nuclear Regulatory Commission (NRC) staff has determined that the following information is needed in order to complete its review:

1. On page 4 of Attachment 1 to the application, the following TS change was proposed:

Modify KPS TS Table TS 3.5-4, "Instrument Operating Conditions for Isolation to include a "Control Room Isolation" function.

a. Provide the set point value for the control room radiation monitor R-23, and describe the methodology used to choose this set point value.

b. Describe how this value is used to actuate the control room isolation function, including the comparison and actuation devices. This may be done by providing a logic diagram and the description of the circuitry.

c. Provide the set point values of the control room area radiation monitor R-1, the fuel handling area monitor R-5, and the auxiliary building ventilation exhaust monitors R-13 and R-14, and describe the methodology used to choose these set point values.

2. On page 5 of Attachment 1, the proposed TS change to modify KPS current TS 4.17.a.2 states:

Automatic initiation of each train on an actual or simulated actuation signal.

a. Does DEK use or plan to use an actual or simulated signal?

b. If DEK plans to use simulated actuation signal, provide the diagram and description of how the signal is generated, and how the control room post-accident recirculation system will be tested.

3. TS Task Force (TSTF) Change Traveler TSTF-448, Control Room Habitability, was developed for plants with pressurized control room envelopes (CREs). DEK stated that KPS has a non-pressurized CRE. Note that in 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 Enclosure

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. Nevertheless, the NRC staff believes that all licensees requesting the adoption of TSTF-448 should include in its request, 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) was 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, so that it can be used as input to a periodic assessment of your CRE boundary. The method should, to the extent practicable, provide information similar to the information requested by paragraph (d) of section [5.5.18] of the programs and manuals section of the STS as modified by revision 3 of TSTF-448.