ML15114A160

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Issuance of Simulator Audit Report License Amendment Request Regarding MELLLA Plus
ML15114A160
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 05/07/2015
From: Bhalchandra Vaidya
Plant Licensing Branch 1
To: Orphanos P
Exelon Generation Co
Vaidya B, NRR/DORL/LPL1-1, 415-3308
Shared Package
ML15114A231 List:
References
TAC MF3056
Download: ML15114A160 (3)


Text

OFFICIAL USE ONLY SENSITIVE INFORMATION UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 May 7, 2015 Mr. Peter M. Orphanos Site Vice President- Nine Mile Point Nuclear Station Exelon Generation Company, LLC 348 Lake Road Oswego, New York 13126

SUBJECT:

NINE MILE POINT NUCLEAR STATION, UNIT NO. 2 - ISSUANCE OF SIMULATOR AUDIT REPORT RE: LICENSE AMENDMENT REQUEST REGARDING MELLLA PLUS (TAC NO. MF3056)

Dear Mr. Orphanos:

By letter dated November 1, 2013, as supplemented by letters dated January 21, February 14, February 25, March 10, May 14, June 13, October 10, December 11, 2014, and February 18, 2015, Nine Mile Point Nuclear Station, Unit 2 (NMP2, the licensee), submitted a request with supplements for changes to the NMP2 Technical Specifications (TSs).

The proposed amendment includes changes to the NMP2 TSs necessary to: (1) implement the Maximum Extended Load Line Limit Analysis Plus (MELLLA+) expanded operating domain; (2) change the stability solution to Detect and Suppress Solution - Confirmation Density (DSS-CD);

(3) use the TRACG04 analysis code; and (4) increase the Safety Limit Minimum Critical Power Ratio (SLMCPR) for two recirculation loops in operation.

In the course of its review, the U.S. Nuclear Regulatory Commission (NRC) staff determined that an on-site audit was necessary in order to complete the review. The audit was conducted on November 20, 2014. The NRC staff's audit report is enclosed.

NOTICE: Enclosure to this letter contains Sensitive Information.

Upon separation from the Enclosure, this letter is DECONTROLLED.

OFFICIAL USE ONLY SENSITIVE INFORMATION

OFFICIAL USE ONLY SENSITIVE INFORMATION P. M. Orphanos If you have any questions, please contact me at 301-415-3308.

Sincerely, Bhalchandra Vaidya, Project Manager Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-41 O

Enclosure:

Simulator Audit Report cc w/o encl: Distribution via Listserv OFFICIAL USE ONLY SENSITIVE INFORMATION

Package: ML15114A231

Enclosure:

ML15114A174 Cover Letter: ML15114A160 OFFICE DORL/LPL 1-1\PM DORL/LPL 1-1\LA DORL/LPL 1-1/BC(A) DORL/LPL 1-1 /PM NAME BVaidya KGoldstein MDudek BVaidya DATE 05/05/2015 05/05/2015 05/06/2015 05/07/2015