ML13059A181

Licensee Slides for 2/28/13 Meeting Via Conference Call with Luminant Generation Company, LLC, (TAC Nos. MC4676 and MC4677)

ML13059A181
Person / Time
Site:	Comanche Peak
Issue date:	02/28/2013
From:	Seawright J Luminant Generation Co
To:	Singal B K Plant Licensing Branch IV
Singal B K
Shared Package
ML13059A180	List: ML13059A181 ML13059A202
References
TAC MC4677, TAC MC4776
Download: ML13059A181 (17)

Text

CPNPP GSI-191 ClosureFebruary 28, 20131 Purpose of the MeetingPurpose of the Meeting*To open plant specific discussions with the NRC regarding strainer testing "The licensee will discuss the Generic Safety Issue 191 (GSI-191)pump strainer test protocols for bypass and head loss testing and related topics for Comanche Peak Nuclear Power Plant, Units 1 d2Thliiidithdltttand 2. The licensee is considering a repeat head loss test to include newly identified debris source (fiberglass tape) and would like to discuss the data extrapolation methods from previous testing to determine if the additional testing is needed." gg2 BackgroundBackground*CPNPP Strainer Testing -Generic Letter 2004-02 Supplemental Response, ER-ESP-001, Rev. 2, October 13, 2009

[ML093080003/ML093080004]*AldenLabsPrototypeStrainerFlumeTestingMarch2006*Alden Labs Prototype Strainer Flume Testing, March 2006*Alion Science and Technology Debris Transport Testing, August 2006*Alden Labs Strainer Flume Testing, March 2008NRCLetterdatedApril192010[ML100950564]*NRC Letter dated April 19, 2010 [ML100950564]*"The NRC staff has no further questions for CPNPP, Units 1 and 2, at this timeregarding completion of corrective actions or GL 2004-02. This conclusion is based on the staff's evaluation of your submittals, with emphasis on your responses to an NRC staff request for additional information dated July 15, 2009."3 BackgroundBackground*NEI Debris Preparation Protocol (January 30, 2012) [ML120481052 and ML120481057] *PCI Strainer Test Protocol *SFSS-TD-2011-001 Rev. 0, SURE-FLOW SUCTION STRAINER

-LARGE FLUME TEST PROTOCOL (LFTP) ELEMENT ISSUES & RESOLUTION, February 13, 2012

• Plant Specific Decisions and Hold Points*CPNPPisevaluatingbypasstestinginatankversusaflumeCPNPP is evaluating bypass testing in a tank versus a flume*Contingent on a suitable test protocol and appropriate precedent4 Comparison to Recent TestingComparison to Recent Testing*Strainer Bypass Test Protocol -Tank Test Precedents*MHI(minimalfiber,LDFG)MHI (minimal fiber, LDFG)*STP (high fiber, LDFG)

• Others ?StrainerBpassTestProtocolFlmeTestPrecedent*Strainer Bypass Test Protocol -Flume Test Precedent*Point Beach (Nukon, LDFG, Mineral wool, Cal-Sil, Asbestos)*CPNPP Plant specific debris issues (lead blanket covers and p(Glass 69 tape

• Lead blanket covers were included in previous testing*Glass 69 tape has not been tested (discovered after previous testing)*Similar to tapes and lead blanket cover materials previously 5tested

• Quantity is much less than previously tested materials Fibrous DebrisFibrous Debris*Latent Fiber (surrogate -treated as Nukon)*Low Density Fiber Glass (surrogate -treated as Nukon)*Min-KFabric(surrogate-shreddedMin-Kfabric)MinK Fabric (surrogate shredded MinK fabric)*Lead Blanket Covers Gl69T*Glass 69 Tape ZOI Fibrous Debris Preparation: Processing, Storage and Handling, Rev. 1, January 2012 (aka NEI Debris Preparation g,,y(pProtocol) *Suitable for LDFG 6*Not suitable for lead blanket covers, Min-K or Glass 69 tape Typical-twoorthreelayersofBlanketCover:AlphaMaritexibly1'x4'Lancs40lbhightemperatureldFiberglassFabricimpregnatedwithsiliconeleadshieldingblanketsrubber7 WCAP-16727-NP Debris8 ProcessedthruProcessedthruchipper/shredder9 Headloss test -drain down without flow10Test 4 Headloss Headloss test -drain down completeSettled fines on top of interceptorinterceptor11Test 4 Headloss Tin powder and 1/64th inch paint chips can be seen on the debris interceptor.

Headloss test -drain down completeHeavier debris load on bottom half12Test 4 Headloss Test 4 Head Loss Extrapolation Curve Exponential -07497 ft0.7497 ft.Last 75 minutes of 10 hour1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> test13 Head LossHead Loss*The extrapolated debris head loss for 30 days (T=2,592,000 sec) using the exponential curve fit is 0.7497 ft of water*The maximum total strainer head loss due to the design basis debrisloadextrapolatedto30daysat212°Fis155feetdebris load extrapolated to 30 days at 212 F is 1.55 feet. *This extrapolation showed a conservative minimum NPSHa margin of 5 feet at 30 days.*Transport testing of intact tapes and labels showed settling before the strainer.*Head loss testing assumed 200 sq. ft. of blocked strainer (approx.

5%)14 Gl69TSth69GlGlass69TapeScotch 69 Glass Cloth Electrical Tape is a white glass tape with a high temperature thermosettingsiliconeadhesivethermosetting silicone adhesive 15 Glass 69 TapeGlass 69 Tape*There are similarities between the Glass 69 tape and the blanket covers (e.g. embedded fiber in chemical and temperature (gpresistance materials)*Comanche Peak is considering using the same debris preparation methodfortheGlass69tapeaswasusedfortheblanketcoversmethod for the Glass 69 tape as was used for the blanket covers*An alternative could be to use an equivalent quantity of Nulkonas a surrogate for the tape *Transport testing for blockage and head loss could be performed separately or as part of an integrated head loss test16 OptionsOptions*Perform Bypass Testing in a Tank*Plant specific debris issues*Limited precedent

• Protocols critical to acceptable results

• SeparatetransporttestingrequiredforGlass69tapeSeparate transport testing required for Glass 69 tape *Perform Bypass Testing in a Flume*CFD requiredUdtdtliiiddd*Understood protocol, prior experience, issues addressed.*Prototypical

• Conservative

• Would include transport and head loss testing of Glass 69 pgtape*. Questions and/or Comments?17