ML13157A118

NRR E-mail Capture - Fermi 2 - Mur - Request for Additional Information - MF0650

ML13157A118
Person / Time
Site:	Fermi
Issue date:	06/05/2013
From:	Mahesh Chawla Division of Operating Reactor Licensing
To:	Hassoun A Detroit Edison
References
TAC MF0650
Download: ML13157A118 (3)

Text

NRR-PMDAPEm Resource From: Chawla, Mahesh Sent: Wednesday, June 05, 2013 3:35 PM To: Alan I Hassoun Cc: Mathew, Roy; Basturescu, Sergiu

Subject:

Fermi 2 - MUR - Request for Additional Information - MF0650 By letter to the U.S. Nuclear Regulatory Commission (NRC) dated February 7, 2013 (Agencywide Documents Access and Management System Accession No. ML13043A659), supplemented by letters dated March 8, 2013 (ADAMS Accession No. ML13070A197), and April 5, 2013 ( ADAMS Accession No. ML13095A456),

Detroit Edison Company submitted a license amendment request application to increase the licensed core thermal power level at the Fermi Unit 2 from 3430 MWt to 3486 MWt. The approved license amendment would revise the Operating License and Technical Specifications to support operation at the increased licensed core thermal power.

The NRC staff in the Electrical Engineering Branch (EEEB) of the Office of Nuclear Reactor Regulation is currently reviewing your submittal. The staff has determined that additional information is required to continue its review and complete its technical evaluation. The request for additional information is attached.

Please provide your response by July 12, 2013.

You may request to discuss the contents of this RAI with the NRC staff in a conference call, including any change to the proposed schedule.

Please dont hesitate to contact me if you have any questions or concerns.

Sincerely, Mac Chawla 301-415-8371 REQUEST FOR ADDITIONAL INFORMATION REGARDING MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE The following questions were developed as a result the staffs review of the licensees license amendment request (LAR) for measurement uncertainty recapture power uprate.

1. On page 6-2 of Enclosure 7 of the LAR, the licensee stated that the only identifiable changes in electrical load demand are associated with the condenser pump, heater feed pumps, and heater drain pumps. The licensee noted changes in the brake horsepower (BHP) for each of these pumps. Provide the nameplate rating for each of these components and the BHP at the Current Licensed Thermal Power (CLTP) and Thermal Power Optimization (TPO) power uprate.

2. Provide a discussion on any changes identified for the protective relays settings due to the TPO uprate?

3. On page 6-1 of Enclosure 7 of the LAR, the licensee stated that the main generator will be operating within the existing generating capability curve for TPO uprate, and, for the summer and winter operations, the gross generator Megawatts electric (MWe) output is on the existing generator capability curve at a rated power factor of 0.90. Provide the gross generator MWe output for summer and winter operations at CLTP and TPO uprate conditions. Also, provide a copy of the main generator capability curve, to show that the generator will continue to operate within the limits of its capability curve.

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4. On page 6-1 of Enclosure 7 of the LAR, the licensee stated that the isolated phase bus ducts main bus is rated at 37,000 ampere (A) and the transformer bus subsections are rated at 18,500 A. Provide the CLTP and TPO uprate loadings for the main and branch sections of the isolated phase bus.

5. On page 6-10 of Enclosure 7 of the LAR, the licensee presents in table format the ratings for main generator step-up transformers 2A and 2B and station service transformers #65 and #64. Provide the CLTP and TPO uprate loadings for these transformers.

6. On page 6-1 of Enclosure 7 of the LAR, the licensee stated that the main transformers and the associated switchyard components (rated for maximum generator output) are adequate for the TPO uprate-related transformer output. Provide analysis of switchyard components at TPO uprate, and show adequate margin between the maximum worst case steady-state load and equipment ratings.

7. On page 9-7 of Enclosure 7 of the LAR, regarding station blackout (SBO) the licensee identified the following consideration which were evaluated:

The adequacy of the condensate/reactor coolant inventory.

The capacity of the Class 1E batteries.

The SBO compressed Nitrogen requirements.

The ability to maintain containment integrity.

The effect of loss of ventilation on rooms that contain equipment essential for plant response to a SBO event.

For each of these considerations provide a detailed discussion on the licensees evaluation. Include CLTP and TPO uprate capacities and margins.

8. On page 10-3 of Enclosure 7 of the LAR, the licensee states that because the TPO uprate does not increase the nominal vessel dome pressure, there is a very small effect on pressure and temperature conditions experienced by equipment during normal operation and accident conditions. Provide temperature, pressure and radiation levels (curves or tables) to demonstrate that environmental qualification of all equipment, inside and outside containment, remains bounding for both normal operation and under accident conditions for the proposed TPO uprate.

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Hearing Identifier: NRR_PMDA Email Number: 718 Mail Envelope Properties (Mahesh.Chawla@nrc.gov20130605153500)

Subject:

Fermi 2 - MUR - Request for Additional Information - MF0650 Sent Date: 6/5/2013 3:35:04 PM Received Date: 6/5/2013 3:35:00 PM From: Chawla, Mahesh Created By: Mahesh.Chawla@nrc.gov Recipients:

"Mathew, Roy" <Roy.Mathew@nrc.gov>

Tracking Status: None "Basturescu, Sergiu" <Sergiu.Basturescu@nrc.gov>

Tracking Status: None "Alan I Hassoun" <hassouna@dteenergy.com>

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 4946 6/5/2013 3:35:00 PM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received: