ML081580034

Handouts from 6/04/2008 Meeting

ML081580034
Person / Time
Site:	Oconee
Issue date:	06/04/2008
From:	Duke Power Co
To:	Office of Nuclear Reactor Regulation
References
Download: ML081580034 (7)

Text

Meeting with United States Nuclear Regulatory Commission Rockville, MD June 4, 2008 Duke

Participants:

Stephen Newman, Regulatory Compliance Lawrence Llibre, Major Projects Group Clifford Davis, Major projects Group Dr. Sami Rizkalla, Testing Director, NCSU Constructed Facilities Lab Agenda:

Introductions

Purpose of Meeting Brief Description of Natural Phenomenon Barrier System (NPBS) Modifications Employing a Fiber-Reinforced Polymer (FRP) System Proposed Utilization of FRP System on Solid Concrete Brick Masonry

> Overview of FRP Test Program Presently Being Conducted at North Carolina State University

- Discussion of FRP Test Program and NRC's Questions/Concerns

> Closing Remarks

~Duke Description of NPBS Modifications o

Unit 3 Control Room North Wall fortify wall to address tornado wind & differential pressure loads and tornado-generated missiles

> install structural steel barriers (wind, differential pressure, and missiles)

Standby Shutdown Facility (SSF) Systems Located within Units 1, 2, and 3 West Penetration and Cask Decontamination Tank Rooms

> improve protection of SSF-related cabling and piping from tornado wind & differential pressure loads and tornado-generated missiles

> apply FRP s em directly to existing masonry construction (differential pressure) and install heavy-duty siding / girt system (wind) utilize TORMIS (missiles)

June 4, 2008 I

Duke Description of NPBS Modifications YPower o

SSF Diesel Fuel Tank Vents protect vent path from tornado wind load and tornado-generated missiles reconfigure vent located immediately adjacent to SSF wall and install structural steel barrier modification complete o

SSF Trench Cover protect elevated portion of cable / pipe trench from tornado wind &

differential pressure loads and tornado-generated missiles install reinforced concrete structure over affected portion of trench modification complete o

Units 1, 2, and 3 Borated Water Storage Tanks (BWST's) improve protection of critical volume of each unit's BWST from tornado-generated missiles install structural steel barrier wall with independent foundation June 4, 2008 2

Duke

'Power Description of NPBS Modifications Unit 3 Control Room North Wall Interior Masonry Wall --\\

SSF Exposed Trench June 4, 2008 3

PDuke 6Power Proposed Solution Using FRP System o Application: Bond-critical application for flexural strengthening of non-load bearing, infill masonry walls to resist higher design loads.

o Loading Condition: Uniform pressure on masonry wall resulting from tornado-induced differential pressure causing tensile stresses in FRP system.

Note: FRP system will not be relied upon as a compressive reinforcement.

June 4, 2008 4

Duke Proposed Solution Using FRP System 6CPower o Location: Surfaces of selected Units 1, 2, and 3 West Penetration and Cask Decontamination Tank Room walls.

o Cask Decontamination Tank Room walls: single wythe, in-fill panels constructed of hollow-core concrete blocks (corrected Safety Evaluation received March 26, 2008)

West Penetration Room walls: double wythe, in-fill panels constructed of solid concrete bricks (subject of current testing program and future LAR)

June 4, 2008 5

Duke

'Power Proposed Solution Using FRP System Typical FRP Application Existing Unreinforced Masonry Wall Vertical FRP Reinforcing I

Horizontal FRP Reinforcing June 4, 2008 6