ML15230A533

Draft Request for Additional Information

ML15230A533
Person / Time
Site:	Three Mile Island
Issue date:	08/18/2015
From:	Robert Gladney Plant Licensing Branch 1
To:	Doug Broaddus Plant Licensing Branch 1
Robert Gladney, 415-1022
References
TAC MF6504
Download: ML15230A533 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 18, 2015 MEMORANDUM TO: Douglas A. Broaddus, Chief Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM: Robert_L. Gl~dney, Project Manager ,./f(J£-~~d?~

Plant L1cens1ng Branch 1-2 , * ~

Division of Operating Reactor Licensing ,

Office of Nuclear Reactor Regulation

SUBJECT:

THREE MILE ISLAND NUCLEAR STATION, UNIT 1 - DRAFT REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MF6504)

The enclosed draft request for additional information (RAI) was transmitted on August 17, 2015, to Mr. David Helker and Mr. Frank Mascitelli of Exelon Generation Company, LLC (Exelon, the licensee). This information was transmitted to facilitate an upcoming conference call in order to clarify the licensee's amendment request for Three Mile Island Nuclear Station, Unit 1 (TMl-1 ),

dated July 23, 2015 (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML15204A843), as supplemented by letter dated July 28, 2015 (ADAMS Accession No. ML15209A960). The proposed amendment would modify technical specification requirements to allow for the temporary connection of the borated water storage tank to non-seismic piping for cleanup and recirculation to support activities associated with the TMl-1 Fall 2015 Refueling Outage and Fuel Cycle 21 operation.

The draft RAI was sent to Exelon to ensure that the questions are understandable, the regulatory basis for the questions is clear, there is no proprietary or sensitive information contained in the draft RAI that should be withheld from the public, and to determine if the information was previously docketed. This memorandum and the enclosure do not convey or represent a U.S. Nuclear Regulatory Commission staff position regarding the licensee's request.

On August 18, 2015, Mr. Helker indicated that a conference call was not required and that a response to the RAI would be provided by August 26, 2015.

Docket No. 50-289

Enclosure:

Draft RAI cc w/enclosure: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST FOR THE TEMPORARY RESTORATION OF BORATED WATER STORAGE TANK CLEANUP AND RECIRCULATION OPERATION EXELON GENERATION COMPANY. LLC THREE MILE ISLAND NUCLEAR STATION. UNIT 1 DOCKET NO. 50-289 By letter dated July 23, 2015 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML15204A843), as supplemented by letter dated July 28, 2015 (ADAMS Accession No. ML15209A960), Exelon Generation Company, LLC (Exelon, the licensee) requested an amendment to Facility Operating License No. DPR-50 for Three Mile Island Nuclear Station, Unit 1 (TMl-1). The proposed amendment would modify technical specification (TS) requirements to allow for the temporary connection of the borated water storage tank (BWST) to non-seismic piping for cleanup and recirculation to support activities associated with the TMl-1 Fall 2015 Refueling Outage and Fuel Cycle 21 operation.

The U.S. Nuclear Regulatory Commission staff has reviewed Exelon's qpplication and, based upon this review, determined that further information is needed to complete our evaluation of the proposed change. The following information is requested:

As part of the license amendment request (LAR), the licensee proposed the addition of the following two notes to TS 3.3.1.1 (a):

1. The BWST piping may be unisolated from seismic Class II Cleanup path piping for a total duration of not more than 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> prior to the scheduled start of the Fall 2015 Refueling Outage and for a total duration of not more than 1440 hours0.0167 days <br />0.4 hours <br />0.00238 weeks <br />5.4792e-4 months <br /> during the following Fuel Cycle 21 operation under administrative and design controls for filtration and/or demineralization of the tank contents.

2. The BWST piping may be unisolated from seismic Class II Recirculation path piping to perform weekly (and after each makeup) BWST boron concentration surveillance testing until the end of Fuel Cycle 21 operation.

The proposed notes would allow the licensee to connect the BWST to seismic Class II piping when it is required to be operable in accordance with TSs through Fuel Cycle 21. The two circumstances when this physical configuration will be implemented include cleanup and surveillance operations. The first note provides a cumulative time the system will be maintained in a cleanup configuration, and it states that the cleanup operation will be performed under administrative and design controls. In contrast, the second note pertaining to surveillance testing does not provide a time constraint, and it does not identify the administrative and design controls as being required.

Enclosure

Technical Specifications Branch (STSB)-Reguest for Additional Information (RAl)-1

1. The LAR states that approximately 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> per week of surveillance testing will be performed, but a time constraint is not identified in the associated note (i.e., the second note that will be added to TS 3.3.1.1 (a)). Revise this note to include a time constraint (e.g., cumulative time or time required to perform the surveillance testing) or justify why a time limit is unnecessary.

STSB RAl-2

2. The LAR states that surveillance testing will be performed under administrative and design controls, but this language is not reflected in the associated note (i.e., the second note that will be added to TS 3.3.1.1 (a)). Revise this note to include the language that the surveillance testing configuration will be performed under administrative and design controls or justify why this language is unnecessary.

ML15230A533 OFFICE NRR/LPLl-2/PM NRR/LPLl-2/LA NRR/LPLl-2/PM NAME RGladney LRonewicz. - RGladney DATE 8/18/15 8/18/15  :./ (' 8/18/15