ML071160016

Virgil C. Summer Nuclear Station, Request for Additional Information Regarding Diesel Generation Technical Specifications (TAC No. MD3687)

ML071160016
Person / Time
Site:	Summer
Issue date:	04/27/2007
From:	Martin R E NRC/NRR/ADRO/DORL/LPLII-1
To:	Archie J South Carolina Electric & Gas Co
Martin R E, NRR/DORL, 415-1493
References
TAC MD3687
Download: ML071160016 (4)

Text

April 27, 2007Mr. Jeffrey ArchieVice President, Nuclear Operations South Carolina Electric & Gas Company Virgil C. Summer Nuclear Station, Unit No. 1 Post Office Box 88 Jenkinsville, South Carolina 29065

SUBJECT:

VIRGIL C. SUMMER NUCLEAR STATION, UNIT NO. 1 - REQUEST FORADDITIONAL INFORMATION REGARDING DIESEL GENERATOR TECHNICAL SPECIFICATIONS (TAC NO. MD3687)

Dear Mr. Archie:

The U.S. Nuclear Regulatory Commission (NRC) staff is reviewing the license amendmentapplication for the Virgil C. Summer Nuclear Station, Unit No. 1 dated November 21, 2006, concerning diesel generator technical specifications and find that we need additional information as identified in the enclosure.

This request for additional information was discussed with your staff on April 12, 2007. Please contact me if you have any questions.Sincerely, /RA/Robert E. Martin, Senior Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-395

Enclosure:

Request for Additional Informationcc: See next page

ML071160016 NRR-088OFFICENRR/LPL2-1/PMNRR/LPL2-1/LANRR/EEEA/BCNRR/LPL2-1/BCNAMERMartin:ncCSolaGWilson (memo)EMarinos DATE 04/27/0704/26/0702/23/0704/27/07 EnclosureREQUEST FOR ADDITIONAL INFORMATIONEMERGENCY DIESEL GENERATOR TECHNICAL SPECIFICATION VIRGIL C. SUMMER NUCLEAR STATION, UNIT NO. 1 (VCSNS)By letter dated May 24, 2006 (ML061500440 [Agencywide Documents Access and ManagementSystem Accession Number]), South Carolina Electric and Gas Company (the licensee), submitted a request to revise the VCSNS technical specification (TS) requirements in response to Technical Specification Task Force (TSTF) Standard Technical Specification Change Traveler, TSTF-449, "Steam Generator Tube Integrity," Revision 4 (ML051090200).According to the Updated Final Safety Analysis Report (UFSAR), Table 8.3-3, Part A1, the totalemergency diesel generator (EDG) loads for the design basis accident "Large Break loss-of-coolant accident with a loss of off-site power," during the indefinite recirculation phase (after the injection phase), are indicated as follows:Total Loads with Optional Loads:4523.9 kilowatts (kW)Optional Loads: 571.3 kW Loads without Optional Loads:3952.6 kWSimilarly, according to the UFSAR, Table 8.3-3, Part A1, the total EDG loads for "Loss of OffsitePower," during the Hot Standby Hour phase, are indicated as follows:Total Loads with Optional Loads:4920 kWOptional Loads:1032 kW Loads without Optional Loads:3888 kWIt is noted that total loads, including the optional (manually started) loads, are more than the EDGcontinuous rating of 4250 kW. Please provide a brief explanation of the optional loads confirmingthat these loads are not needed to meet the safety requirements of the plant. Also, provide the pertinent references (or pages) from the Emergency Operating Procedures and System Operating Procedures which confirm that the Plant Operator has adequate instructions to ensure that no EDG will be loaded above its short time rating of 4676 kW for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, and continuous rating of 4500 kW for 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> in any 24-hour period, to meet the intent of the Technical Specifications.

Virgil C. Summer Nuclear Station, Unit No. 1 cc:Mr. Jeffrey B. Archie Vice President, Nuclear Operations South Carolina Electric & Gas Company Virgil C. Summer Nuclear Station, Unit No. 1 Post Office Box 88 Jenkinsville, SC 29065 Mr. R. J. WhiteNuclear Coordinator S.C. Public Service Authority c/o Virgil C. Summer Nuclear Station, Unit No. 1 Post Office Box 88, Mail Code 802 Jenkinsville, SC 29065Resident Inspector/Summer NPSc/o U.S. Nuclear Regulatory Commission 576 Stairway Road Jenkinsville, SC 29065Chairman, Fairfield County CouncilDrawer 60 Winnsboro, SC 29180Mr. Henry Porter, Assistant DirectorDivision of Waste Management Bureau of Land & Waste Management Dept. of Health & Environmental Control 2600 Bull Street Columbia, SC 29201Mr. Thomas D. Gatlin, General ManagerNuclear Plant Operations South Carolina Electric & Gas Company Virgil C. Summer Nuclear Station, Unit No. 1 Post Office Box 88, Mail Code 300 Jenkinsville, SC 29065Mr. Robert G. Sweet, ManagerNuclear Licensing South Carolina Electric & Gas Company Virgil C. Summer Nuclear Station, Unit No. 1 Post Office Box 88, Mail Code 830 Jenkinsville, SC 29065Ms. Kathryn M. SuttonMorgan, Lewis & Bockius LLP 111 Pennsylvania Avenue, NW.

Washington, DC 20004