ML21320A204

Closeout of Bulletin 2012 01, Design Vulnerability in Electric Power System

ML21320A204
Person / Time
Site:	Salem
Issue date:	11/19/2021
From:	James Kim Plant Licensing Branch 1
To:	Carr E Public Service Enterprise Group
Kim J
References
Download: ML21320A204 (4)

Text

November 19, 2021

Mr. Eric Carr President and Chief Nuclear Officer PSEG Nuclear, LLC - N09 P.O. Box 236 Hancocks Bridge, NJ 08038

SUBJECT:

SALEM NUCLEAR GENERATING STATION, UNITS 1 AND 2 - CLOS EOUT OF BULLETIN 2012-01, DESIGN VULNERABILITY IN ELECTRIC POWER SYSTEM

Dear Mr. Carr:

The purpose of this letter is to inform you that the U.S. Nucle ar Regulatory Commission (NRC) staff has verified that PSEG Nuc lear LLC (PSEG, the licensee) h as provided the necessary information requested in NRCs Bulletin (BL) 2012-01, Design V ulnerability in Electric Power System, dated July 27, 2012 (Agencywide Documents Access and M anagement System (ADAMS) Accession No. ML12074A115), for Salem Nuclear Generatin g Station, Units 1 and 2 (Salem). The NRC staff has completed its review of this inform ation and has closed out BL 2012-01 for this facility.

The NRC issued BL 2012-01 on July 27, 2012, to all holders of o perating licenses and combined licenses for nuclear power reactors, except those who have permanently ceased operation and have certified that fuel has been removed from th e reactor vessel. The Bulletin requested information about each facilitys electric power syst em designs that would allow the NRC staff to verify the systems capability to address open pha se conditions. Specifically, the NRC requested licensees to provide the following information:

A description of how the protection scheme for engineered safe ty features buses (Class 1E for current operating plants or non-Class 1E for pass ive plants) is designed to detect and automatically respond to a single-phase open circuit condition or high impedance ground fault condition on offsite power circuits or a nother power source; and

A description of the operating configuration of engineered saf ety features buses (Class 1E for current operating plants or non-Class 1E for pass ive plants) at power (i.e.,

normal operating condition).

By letter dated October 23, 2012 (ADAMS Accession No. ML12312A0 62), the licensee provided its response to BL 2012-01 for Salem. By letter dated January 30, 2014 (ADAMS Accession No. ML14030A478), the licensee provided supplemental informatio n for this facility in response to an NRC staff request for additional information issued on De cember 20, 2013 (ADAMS Accession No. ML13351A314).

By letters dated October 9, 2013, and March 16, 2015 (ADAMS Acc ession Nos. ML13333A147 and ML15075A454, respectively), the Nuclear Energy Institute (N EI) submitted a voluntary E. Carr

industry initiative to address open phase conditions at nuclear power plants. The NEI letter dated March 16, 2015, stated, in part: The initiative is a fo rmal commitment by the companies that operate nuclear power plants to follow a specific policy o r plan of action. The initiative calls for a proactive plan and schedule for addressing potential desi gn vulnerabilities to the open phase condition.

To evaluate the adequacy of the open phase isolation systems de signs, the NRC staff issued Temporary Instruction (TI) 2515/194, Inspection of the License es Implementation of Industry Initiative Associated with the Open Phase Condition Design Vuln erabilities in Electric Power Systems (NRC Bulletin 2012-01), dated October 31, 2017 (ADAMS Accession No. ML17137A416), which provided temporary inspection instructi ons for the purpose of verifying that licensees appropriately implemented the NEI volu ntary industry initiative dated March 16, 2015. The NRC staff piloted the use of TI 2515/194 b y inspecting four nuclear power plants with four distinct open phase isolation system designs. A summary of the NRC staffs preliminary observations and issues needing additional clarity were discussed with industry representatives in two public meetings conducted on September 1 9, 2018, and October 17, 2018. The meeting summaries can be found in ADAMS under Packag e Accession Nos. ML18268A342 and ML18309A226, respectively.

By letter dated June 6, 2019 (ADAMS Accession No. ML19163A176), NEI submitted Revision 3 of the voluntary industry initiative to include an option for p lants to perform a risk evaluation under certain boundary conditions to support manual response to an open phase condition. NEI also submitted NEI 19-02, Guidance for Assessing Open Phase Co ndition Implementation Using Risk Insights on June 20, 2019 (ADAMS Accession No. ML19 172A086). On August 18, 2020, the NRC staff issued Revision 2 of TI 2515/194 (ADAMS Acc ession No. ML20230A328),

which provided temporary inspection instructions for the purpos e of verifying that licensees appropriately implemented Revision 3 of the NEI voluntary indus try initiative. The revision accounted for changes reflected in Revision 3 of the NEI volunt ary initiative.

In March 2020, the NRC staff performed an inspection at Salem u sing TI 2515/194 dated October 31, 2017. In September 2021, the NRC staff performed a n inspection at Salem using TI 2515/194 Revision 2. The inspections were performed to veri fy the licensees implementation of the voluntary industry initiative at this fac ility. To address the open phase condition design vulnerability issue at this facility, the lice nsee implemented open phase isolation system plant modifications, which provide detection a nd alarm in the control room, and necessary plant procedures that allow operators to diagnose and take manual action to mitigate an open phase condition. The NRC inspection reports listed below document the results of the TI 2515/194 inspections.

Salem Nuclear Generating Station, Units 1 and 2 - Temporary In struction 2515/194 Report 05000272/2020010 and 05000311/2020010, dated April 8, 20 20 (ADAMS Accession No. ML20107H134)

Salem Nuclear Generating Station, Units 1 and 2 - Temporary In struction 2515/194 Report 05000272/2021011 and 05000311/2021011, dated September 3 0, 2021 (ADAMS Accession No. ML21272A282)

The NRC staff reviewed the information submitted by the licensee and the results of the TI 2515/194 inspections for Salem. A minor exception was ident ified as the Updated Final Safety Analysis Report was updated with an incorrect as-built c onfiguration of the open phase detection system, and the licensee captured this exception in t heir corrective action program.

E. Carr

The staff found this acceptable. Based on this review, the NRC staff concludes that the licensee provided the necessary information requested in BL 201 2-01 and has completed the implementation of its open phase isolation system. Therefore, the NRC staff closes BL 2012-01 for Salem.

If you have any questions, please contact me at 301-415-4125 or James.Kim@nrc.gov.

Sincerely,

/RA/

James S. Kim, Project Manager Plant Licensing Branch I Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation

Docket Nos. 50-272 and 50-311

cc: Listserv

ML21320A204 OFFICE NRR/DORL/LPL1/PM NRR/DORL/LPL1/LA NRR/DEX/EEEB/BC NAME JKim KEntz WMorton DATE 11/17/2021 11/17/2021 11/15/2021 OFFICE NRR/DRA/APOB/BC NRR/DRO/IOEB/BC NRR/DORL/LPL1/BC NAME AZoulis LRegner JDanna DATE 11/17/2021 11/19/2021 11/19/2021 OFFICE NRR/DORL/LPL1/PM NAME JKim DATE 11/19/2021