ML17156A161

Browns Ferry Nuclear Plant - Notification of Inspection and Request for Information

ML17156A161
Person / Time
Site:	Browns Ferry
Issue date:	06/02/2017
From:	Walker S A NRC/RGN-II/DRS/EB
To:	Shea J W Tennessee Valley Authority
References
Download: ML17156A161 (6)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION REGION II 245 PEACHTREE CENTER AVENUE NE, SUITE 1200 ATLANTA, GEORGIA 30303-1257 June 2, 2017

Mr. Joseph W. Shea Vice President, Nuclear Licensing Tennessee Valley Authority 1101 Market Street, LP 3D-C

Chattanooga, TN 37402-2801

SUBJECT:

BROWNS FERRY NUCLEAR PLANT - NOTIFICATION OF INSPECTION AND REQUEST FOR INFORMATION

Dear Mr. Shea:

The NRC will perform the baseline heat sink (HS) inspection at the Browns Ferry Nuclear Plant from July 24 - 28, 2017. Experience has shown that this inspection is resource intensive both for the NRC inspectors and your staff. In order to minimize the impact to your on-site resources and to ensure a productive inspection, we have enclosed a request for documents needed for this inspection. These documents have been divided into two groups. The first group (section A of the enclosure) identifies information to be provided prior to the inspection to ensure that the inspectors are adequately prepared. The second group (section B of the enclosure) identifies the information the inspectors will need upon arrival at the site. It is important that all of these documents are up to date and complete in order to minimize the number of additional documents requested during the preparation and/or the onsite portions of the inspection.

We discussed the schedule for these inspection activities with your staff and understand that our regulatory contact for this inspection will be Justin Garner of your organization. Our inspection dates are subject to change based on your updated schedule of activities. If there are any questions about this inspection or the material requested, please contact the lead inspector, Paula Cooper, at (404) 997-4468 (Paula.Cooper@nrc.gov

). In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter and its enclosure will be available electronically for public inspection in the NRC Public Document

2 Room or from the Publicly Available Records (PARS) component of NRC's document system (ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).

Sincerely,

/RA/

Shakur A. Walker, Chief Engineering Branch 3 Division of Reactor Safety

Docket Nos. 50-259, 50-260, 50-296 License Nos.: DPR-33, DPR-52, DPR-68

Enclosure:

Pre-Inspection Document Request

cc: Distribution via Listserv

____ x SUNSI REVIEW COMPLETE X FORM 665 ATTACHED OFFICE RII/DRS RII/DRS SIGNATURE pec SAW4 NAME P. Cooper S. Walker DATE 06/1/2017 06/2/2017 E-MAIL COPY YES NO YES NO YES NO YES NO YES NO YES NO YES NO Enclosure HEAT SINK PERFORMANCE DOCUMENT REQUEST Inspection Dates: July 24 - July 28, 2017 Inspection Procedures: IP 71111.17, "Heat Sink Performance"

Inspectors: P. Cooper, Reactor Inspector (Lead Inspector)

A. Information Requested for the In-Office Preparation Week The following information should be sent to the Region II office in hard copy or electronic format (preferred), in care of Paula Cooper by July 14, 2017, to facilitate the selection of specific items that will be reviewed during the onsite inspection week. The inspector will select specific items from the information requested below and then request from your staff additional documents needed during the onsite inspection week (section B of this enclosure). We ask that the specific items selected from the lists be available and ready for review on the first day of inspection. *Please provide requested documentation electronically if possible. If requested documents are large and only hard copy formats are available, please inform the inspector, and provide subject documentation during the first day of the onsite inspection. If you have any questions regarding this information request, please call the inspector as soon as possible.

A.1 Heat Exchangers and Service Water Equipment a) List of heat exchangers (HXs) or equipment cooled by service water (SW) directly or indirectly

• Include the risk ranking from the site specific risk assessment for each listed HX

• Detail whether any cleaning or inspection activities are planned during the proposed onsite inspection period for any of the listed HXs

• For HXs directly cooled by SW, provide the testing, inspection, maintenance, and monitoring of biotic fouling and macrofouling program documents b) Detail the HX performance inspection methods and results for HXs that are inspected/cleaned

c) Response to Generic Letter 89-13 including any regulatory commitments made

d) Design Basis documents associated with the SW system

e) Design Basis documents associated with the Ultimate Heat Sink (UHS)

f) SW system flow diagrams

g) Recent Health Reports and self-assessments associated with the SW System and systems that are cooled by SW

h) List of SW system related corrective action documents (with a brief description) 2 which have received a Root Cause Analysis or an elevated severity level in the last two years i) Recent Operating Experience Events (2014-2017)

j) List of applicable Codes and Industry Guidelines

k) List of findings in the heat sink/heat exchanger performance area for the last 3

years l) List of redundant or infrequently used HXs

m) Chemistry Program for safety-related HXs.

n) Detail whether the UHS is above ground encapsulated by embankments, weirs or excavated side slopes, underwater weir or excavation, or forced draft cooling

tower or spray pond

o) Provide a list of buried or inaccessible piping and the piping test program, inspection or monitoring program

p) List of safety-related and non-safety related valve interface

q) Most recent self-assessment repor ts performed on the UHS and SW systems

B. Information to be provided on-site to the inspector at the entrance meeting (July 24, 2017):

B.1 Heat Exchangers and Service Water Equipment The inspector will select two to four heat exchangers and/or heat sink samples as required by the inspection procedure during in-office preparation. The following items will be requested when the selections are made.

a) Updated list of System Engineers b) List of any thru-wall leaks including completed or planned corrective actions and structural evaluations c) Provide a copy of the corrective actions and supporting documentation d) For the HXs that have Visual and/or Eddy Current Testing performed, provide a copy of the examination records, examiner qualification records, and associated corrective action documents e) Heat transfer calculations f) Evaluations for the potential of water hammer g) Documentation for controls and operational limits for excessive flow induced vibrations

3 h) Periodic flow test results at/or near maximum design flow i) For an UHS that is encapsulated by embankments, weirs of excavated side slopes provide: (1) third party dam inspection results, and (2) documentation showing that there is sufficient reservoir capacity j) For an UHS that is an underwater weir or excavation provide documentation showing: a. Periodic monitoring and trending of sediment build-up b. Sufficient reservoir capacity

c. Considerations for adjacent non-seismic and/or non-safety related structures of possible degradation or blocking of safety-related flow paths

due to severe weather or seismic events d. Performance monitoring of heat transfer capabilities e. Performance monitoring of UHS structural integrity k) SW flow balance test results Inspector Contact Information:

Paula Cooper Reactor Inspector

404-997-4468

Paula.Cooper@nrc.gov Mailing Address: US NRC Region 2 Attn: Paula Cooper Marquis One Tower 245 Peachtree Center Avenue, NE Suite 1200 Atlanta, GA 30303