ML062760245

V. C. Summer Nuclear Station RF-16 Outage Information

ML062760245
Person / Time
Site:	Summer
Issue date:	09/27/2006
From:	Andrea Torres South Carolina Electric & Gas Co
To:	Office of Nuclear Reactor Regulation
References
Download: ML062760245 (27)

Text

V. C. Summer Nuclear StationRF-16 Outage InformationAlan TorresManager, Planning and SchedulingEnclosure RF-16 Goals*Outage goals-Nuclear safety*Protect the core and the public (conservative decisions) *Use N+1 (Safety Function Bar Chart)*Secondary side focus (use of secondary side outage manager)*Readiness reviews using Equipment Risk RF-16 Goals-Radiological safety*ALARA (use one train of RHR for shutdown)*Dose control-use PRC resin*Control Crud Burst (24hr RCP run after peroxide injection) -Industrial safety*Two minute drill *Pre-job briefs

• Be smart-use OE (Book)

RF-16 Goals*Duration: 37 Days*Budget projected at 25.7 m*Human Performance Events: <

1*Recordable Injuries: <

1*Significant Safety Events: 0

• Post 100% -90 Day Capacity: *Dose: 70 REM RF-16 Major Modifications*New Alternate AC supply to 1DX-Reduction in CDF of 31.8%*Reactor Building Sump Redesign-Change out of SI Throttle valves-Addition of debris catchers*Replacement of RV head nuts with Hydranuts-Significant Dose savings*Replacement of B DG Governor-Improved reliability RF-16RB Sump RF-16New Sump Design RF-16Hydra Nuts RF-16 Items of Interest*Reactor lower head visual inspection*Upper head volumetric inspection*B Hot leg volumetric inspection*Containment tendon inspection*LP A inspection and overhaul*LP A condenser bellows replacement RF-16Expansion Bellows RF-16Reactor Head Volumetric Exam RF-16 Items of Interest *Replacement of air disconnect 8903 on main out going bus*Replacement of DC feedback cards on EX2000 excitation system Program Enhancements RF-16 Program Improvements*Program Changes-Implementation of a new FME program-Use of new maintenance procedure format-Use of an integrated valve team for AOV/MOV'S RF-15 Carry over*Operating Experience books*Daily talking points

• Weekly outage newsletter*Rewarded behaviors program utilizes human performance error reduction tools *Outage observation blitz RF-16*Challenges-RCS leakage identification plan-Identification and resolution of fuel leaker-Potential unknown on volumetric head inspection-SI flow balance-Alternate AC power retest Questions?

V.C. Summer Station Recirculation Sump Design ChangesKirk WeirDesign Engineering Overview*Analysis Results*Ongoing Analysis Work*Refuel 16 Activities Analysis Results*~930ft 2 strainer for each train*8.2 ft 3fiber load on the sump-1.5 ft 3tempmat-6.7 ft 3latent fiber (105 lbs latent debris)*190 ft 2unqualified tape, placards, stickers*"Chemical Effects" account for <1% total particulate*High particulate load

• Mariniteinsulation is not a problem Analysis Results*713.7 ft 3of RMI (mirror insulation) debris*27.3 ft 3transports to the sump-based on RMI debris transport testing-removed the need for debris interceptors Analysis Results*Evaluation of sump level for break inside the primary shield was completed and is acceptable*Evaluation of sump level for break inside the pressurizer cubicle was completed and is acceptable. the pressurizer cubicle door latching mechanism is assumed to fail.*HHSI throttle valves will be replaced due to downstream effects-current valve opening is 1/32"-new valve opening is ~3/32" Ongoing Analysis Work*Cumulative effects program -calculations are being completed and procedure updates are prepared*Evaluation of downstream effects*Conducting large scale testing on strainers RF-16 Modifications*Complete recirculation sump strainer replacement-2400 ft 2per train-RHR and spray pump strainers cross-tie*Trash racks*Block southern stairwell of 436 ft elevation*Remove toe-kick plate on 436 ft elevation*Installation of new HHSI throttle valves AECL Strainer Designs Review*On track to meet the requirements of the Generic Letter*Supplemental response to Generic Letter by 12/31/06*Major modifications planned for RF16 Questions?