ML121370983

RAI - Load Tap Changers with Service Transformers

ML121370983
Person / Time
Site:	FitzPatrick
Issue date:	05/14/2012
From:	Thadani M Plant Licensing Branch 1
To:	O'Farrill J, Joseph Pechacek Entergy Nuclear Operations
Thadani M, NRR/DORL, 415-1476
References
TAC ME6877
Download: ML121370983 (1)

Text

From: Thadani, Mohan Sent: Monday, May 14, 2012 1:49 PM To: O'Farrill, Jorge; jpechac@entergy.com

Subject:

RAI To Licensee.docx Thank you Jorge for the correction of Joes email address.

Joseph Pehcek/Jorge OFarill:

Please see the request for additional information below.

Thank you for your support.

Mohan C Thadani Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation (301) 415-1476 Mohan.Thadani@nrc.gov

SUBJECT:

JAMES A. FITZPATRICK NUCLEAR POWER PLANT -

REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED USE OF ON LOAD TAP CHANGERS WITH THE RESERVE STATION SERVICE TRANSFORMERS (TAC NO ME6877) Docket No. 50-333.

By letter dated August 16, 2011 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML112280282) Entergy Nuclear Operations, Inc. (the licensee) requested a revision to the Operating License for the James A. FitzPatrick Nuclear Power Plant (JAF). The proposed change would revise the JAF current licensing basis to allow the use of On Load Tap Changers with new Reserve Station Service Transformers that provide offsite power to JAF. In response to the staffs request for additional information (RAI). The licensee provided supplemental information in its letter dated March 30, 2012 (ADAMS Accession No. ML12090A613).

The NRC staff has reviewed the supplemental information provided by the licensee in response to the RAI, and has identified a need for the following additional information. In an effort to complete our review, the NRC staff requests that the licensee provide NRC its formal response to the additional request for additional information below. The written response should be provided to the NRC staff within 30 days from the date of this email.

1. In response to the staffs RAI Question 5 (Parts b and d), the licensee provided transient voltage profiles of the 4 kV buses in Enclosures 5 and 6. Provide the associated Electrical Transient Analysis Program (ETAP) output reports for ease in interpreting the voltage profiles.

2. In response to the staffs RAI Question 7, the licensee provided Figures 1 and 2 showing the Pre and Post Transfer Voltage Control Bands, which also show the Degraded Voltage Relay Reset (Upper Limit) and Drop-out (Upper Limit) voltage values. Provide a copy of the calculation which demonstrates the relationship between the Degraded Voltage Relay Reset (Upper Limit) and Drop-out (Upper Limit) voltage values, and the Degraded Voltage Allowable voltage values provided in Technical Specifications Table 3.3.8.1-1.

3. The FSAR (Final Safety Analysis Report) Update Page 8.6-9 has been provided in both Enclosures 2 and 3 of the response. However, it appears that only the Page 8.6-9 provided in Enclosure 3 is applicable. Provide confirmation of the valid page.