ML16153A281

Request for Additional Information Related to the License Amendment Request to Increase the Minimum Required Fuel Oil in Each Standby Diesel Generator Fuel Oil Day Tank (CAC Nos. MF7158 and MF7159)

ML16153A281
Person / Time
Site:	Dresden
Issue date:	06/08/2016
From:	Haskell R Plant Licensing Branch III
To:	Bryan Hanson Exelon Generation Co, Exelon Nuclear
Haskell R, NRR/DORL/LPLIII-2, 415-1129
References
CAC MF7158, CAC MF7159
Download: ML16153A281 (5)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 June 8, 2016 Mr. Bryan C. Hanson Senior Vice President Exelon Generation Company, LLC President and Chief Nuclear Officer (CNO)

Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE LICENSE AMENDMENT REQUEST TO INCREASE THE MINIMUM REQUIRED FUEL OIL IN EACH STANDBY DIESEL GENERATOR FUEL OIL DAY TANK AND PROPOSED CHANGE TO TECHNICAL SPECIFICATION 3.8.1, "AC SOURCES -

OPERATING" (CAC NOS. MF7158 AND MF7159)

Dear Mr. Hanson:

By application dated December 14, 2015 (RS-15-297) (Agencywide Documents Access and Management System (ADAMS) Accession No. ML15348A224), Exelon Generation Company, LLC (EGC, the licensee) submitted a license amendment request for Dresden Nuclear Power Station, Units 2 and 3. The proposed amendment request would increase the minimum required fuel oil in each standby diesel generator fuel oil day tank and change Technical Specification 3.8.1, "AC Sources - Operating."

The U.S. Nuclear Regulatory Commission (NRC) staff is reviewing your submittal and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter. During a discussion with Mr.

Mitchell Mathews of your staff on May 31, 2016, it was agreed that EGC would provide a response by June 30, 2016.

The NRG staff considers that timely responses to requests for additional information helps ensure that sufficient time is available for staff review and contributes towards the NRC's goal of efficient and effective use of staff resources.

B. Hanson If circumstances result in the need to revise the requested response date, please contact Mr.

Russell Haskell at (301) 415-1129, or by email at Russell.Haskell@nrc.gov.

-~

Russell S. Haskell II, Project Manager Plant Licensing Branch 111-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-237, 50-249

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION EXELON GENERATION COMPANY, LLC DRESDEN NUCLEAR POWER STATION (DNPS), UNITS 2 AND 3 LICENSE AMENDMENT REQUEST FOR TECHNICAL SPECIFICATION 3.8.1 "AC SOURCES - OPERATING" DOCKET NOS. 50-237, 50-249 RAI EPNB-1 On Page 4 of Attachment 1 to the license amendment request (LAR), the licensee states that "Ultra Low Sulfur Fuel Oil (ULSD) has been in use at DNPS since 2007; therefore, this confirmation of fuel oil consumption rates also accounts for the use of ULSD." ASTM D 975, "Standard Specification for Diesel Fuel Oils," allows for up to 5 percent biodiesel in the fuel oil without labeling.

Discuss whether or not the actual fuel oil consumption rate, and the fuel oil consumption rate curve provided by the manufacturer, take into account up to 5 percent biodiesel allowed by ASTM D 975. If fuel oil is received without biodiesel at DNPS, explain how that is ensured.

RAI EPNB-2 On Page 4 of Attachment 1 to the LAR, it is stated that Table 1, "Comparison of Volumetric Gross Heat Content at American Petrolium Institute (API) Gravities of 32 and 39," demonstrates the relationship of volumetric gross heat to API gravity.

For the gross heat values in Table 1, discuss how the use of ULSD is factored into the gross heat values in the table.

RAI EPNB-3 On Page 5 of Attachment 1 to the LAR, the licensee states that "the fuel oil consumption rate provided by the [diesel generator] DG engine manufacturer adequately covers the fuel consumption for the Unit 2, Unit 3, and Unit 2/3 DGs over the range of API gravity values allowed by the Dresden Diesel Fuel Oil Testing Program."

Provide the related manufacturers engine data which supports the fuel oil consumption rate being adequate for the DNPS DGs for the range of API gravity values allowed by DNPS Diesel Fuel Oil Testing Program.

Enclosure

RAI EPNB-4 On Page 5 of Attachment 1 to the LAR, the licensee states that an engineering evaluation determined that when the DG output is 3035 kW, the corresponding fuel oil consumption rate is 211 gallons per hour.

For the DG loading of 3035 kw, as specified above, provide the engineering evaluation or supporting documentation which support the fuel consumption rate is 211 gallons per hour.

B. Hanson If circumstances result in the need to revise the requested response date, please contact Mr.

Russell Haskell at (301) 415-1129, or by email at Russell.Haskell@nrc.gov.

Sincerely, IRA/

Russell S. Haskell II, Project Manager Plant Licensing Branch 111-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-237, 50-249

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv DISTRIBUTION:

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• b1yema1*1 OFFICE DORULPL3-2/PM DORULPL3-2/LA DE/EPNB/BC DORULPL3-2/BC(A)

NAME RHaskell SRohrer DAiiey* EMiller DATE 6/01/2016 6/02/16 5/16/2016 6/8/16 OFFICE DORULPL3-2/PM NAME RHaskell DATE 6/8/2016 OFFICIAL RECORD COPY