ML14346A177

Request for Additional Information Round 2 Nr/De/Eeeb, Request to Revise Updated Final Safety Analysis Report to Clarify Pressurizer Heaters Function for Natural Circulation at the Onset of a Loss of Offsite Power

ML14346A177
Person / Time
Site:	Waterford
Issue date:	12/19/2014
From:	Michael Orenak Plant Licensing Branch IV
To:	Entergy Operations
Orenak M
References
TAC MF3058
Download: ML14346A177 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 December 19; 2014 Vice President, Operations Entergy Operations, Inc.

Waterford Steam Electric Station, Unit 3 17265 River Road Killona, LA 70057-3093

SUBJECT:

WATERFORD STEAM ELECTRIC STATION, UNIT 3- REQUEST FOR ADDITIONAL INFORMATION REGARDING A CHANGE TO THE UPDATED FINAL SAFETY ANALYSIS REPORT CLARIFYING PRESSURIZER HEATERS FUNCTION FOR NATURAL CIRCULATION (TAC NO. MF3058)

Dear Sir or Madam:

By letter dated November 11, 2013, Entergy Operations, Inc. (the licensee), submitted a license amendment request (LAR) to revise the Waterford Steam Electric Station, Unit 3 Updated Final Safety Analysis Report Sections 1.9.26 and 5.4.1 0.2 to clarify how the Pressurizer Heaters function is met for natural circulation at the onset of a loss-of-offsite power concurrent with the

. specific single-point vulnerability. By letter dated October 23, 2014, the licensee provided supplemental information to the LAR.

After reviewing the October 23, 2014, supplemental information, the U.S. Nuclear Regulatory Commission staff has determined that additional information is required to complete the review.

Please provide the additional information requested in the enclosure within 30 days of receipt of this letter.

If you have any questions,. please contact me at 301-415-3229 or via e-mail at Michaei.Orenak@nrc.gov.

Sincerely,

J44) ~ 6~

Michael D. Orenak, Project Manager Plant Licensing IV-2 and Decommissioning Transition Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-382

Enclosure:

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

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST TO CLARIFY THE UPDATED FINAL SAFETY ANALYSIS REPORT PRESSURIZER HEATERS FUNCTION ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION, UNIT 3 DOCKET NO. 50-382 By letter dated November 11, 2013 (Agencywide Documents Access and Management System Accession No. ML13316C052), Entergy Operations, Inc. (the licensee), submitted a license amendment request (LAR) to revise the Waterford Steam Electric Station, Unit 3 Updated Final Safety Analysis Report (UFSAR) Sections 1.9.26 and 5.4.1 0.2 to clarify how the Pressurizer Heaters function is met for natural circulation at the onset of a loss-of-offsite power concurrent with the specific single-point vulnerability. By letter dated October 23, 2014 (ADAMS Accession No. ML14300A020), the licensee provided supplemental information to the LAR.

During the U.S. Nuclear Regulatory Commission staff's review of the supplemental information, the staff found the following inconsistencies between the LAR, the UFSAR, and the supplemental information. Please provide necessary clarifications or additional information.

1. In UFSAR Figure 8.3-33, the reclosing of two 4.16 kiloVolt circuit breakers to two 480 Volt switchgears (3A32 and 3B32 supplying the pressurizer heaters) is explained with the following symbols and notes:

Symbol Tc (applicable to both breakers)- Breaker recloses automatically when the diesel generator voltage is available (See Note 1).

Note 1 (applicable to both breakers)- This breaker opens upon Safety Injection Actuation Signal (SIAS) but may be closed from Control Room 205 seconds after SIAS if offsite power is unavailable.

Note 5 (applicable to only one breaker) - If Loss of Offsite Power (LOOP) and SIAS are present, this breaker may be closed 205 seconds after SIAS locally at the breaker.

• The above symbol and notes appear to be inconsistent with each other. In addition, there are inconsistencies with the LAR, which states that these breakers would close automatically (unless the single-point vulnerability disables closing of these breakers).

Please explain reclosing of the above breakers under the following scenarios: (1) LOOP only, (2) SIAS only, and (3) Concurrent LOOP and SIAS. If any changes to the UFSAR Figure 8.3-33 are required, please provide a proposed markup of the figure.

Enclosure

2. In the October 23, 2014, supplement, Question 3 referred to the Switchgears 32A and 328. However, in the LAR and UFSh\R Figure 8.3-33, the licensee referred to these switchgears with the respective designations 3A32 and 3832. Please resolve inconsistency in the switchgear designations, and provide a revised Response 3, if necessary.

ML14346A177 *RAI memo dated **via email OFFI.CE NRR/DORL/LPL4-2/PM NRR/DORLILPL4-2/LA NRR/DORL/LPL4-2/LA NAME MOrenak PBiechman JBurkhardt**

DATE 12/18/14 12/16/14 12/18/14 OFFICE NRR/DE/EEEB/BC NRR/DORLILPL4-2/BC NRR/DORLILPL4-2/PM NAME JZimmerman* DBroaddus (TWengert for) MOrenak DATE 12/5/14 12/19/14 12/19/14