ML110200608

E-mail Conference Call with Licensee to Clarify RAIs (Exelon)

ML110200608
Person / Time
Site:	Clinton
Issue date:	01/20/2011
From:	Chuck Norton Plant Licensing Branch III
To:	Robert Carlson Plant Licensing Branch III
Norton, Charles, DORL -415-7818
References
Download: ML110200608 (1)

Text

From: Norton, Charles Sent: Thursday, January 20, 2011 10:53 AM To: Wohl, Marilyn

Subject:

FW: ML0201702811.docx Attachments: ML0201702811.docx From: Norton, Charles Sent: Thursday, January 20, 2011 9:57 AM To: Carlson, Robert Cc: Wohl, Marilyn; DiFrancesco, Nicholas

Subject:

ML0201702811.docx

Bob, This email is to document a conference between members of the NRC staff and members of Exelon Staff for the purpose of clarifying RAIs concerning TSTF 501, which relocates EDG fuel oil volumes from the TS to the TS bases.

The following people were on the call:

Nick DiFrancesco NRR Robert Wolfgang NRR Gurchaaran Matharu NRR Chuck Norton NRR Mitch Mathews EGC Mike Heger EGC The following RAIs were clarified:

5. Provide the expected change in accident loading for each emergency diesel generator (EDG) over the 7-day accident period.

6. Provide the rate of fuel oil consumption for each EDG at full load conditions and at overload conditions. How are the rates of consumption established (recent testing, OEM data, etc.)? Have the EDG efficiencies been verified? Do the fuel oil volume calculations assume a linear change in the fuel oil consumption at different loading conditions? Are the fuel oil consumption rates used for Ultra Low Sulfur Diesel fuel?

7. Does the Clinton Power Station fuel oil volume calculation method yield conservative results compared to the ANSI N195-1976 method (i.e., account for the 10% margin, account for the fuel oil volume consumed by testing) for each EDG?

8. Provide the amount of fuel oil volume consumed by testing (the value T in ANSI N195-1976) for each EDG.

Chuck Norton