ML22319A094

EN 56219 - Flowserve. 10 CFR Part 21 Report 38878-8 Solenoid Valve at Duke, Catawba Flowserve Evaluation 105

ML22319A094
Person / Time
Site:	Catawba
Issue date:	11/10/2022
From:	Dills T Flowserve Corp
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
56219
Download: ML22319A094 (1)

Text

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 01/35 Do uSign Envelope ID: i1CF11C3-1AB2-4D1D A501-E07B7627177B 0

November 10, 2022 U,S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001

Subject:

10 CFR Part 21 Report 38878-8 Solenoid Valve at Duke, Catawba Flowserve Evaluation #105 Flowserve Corporation hereby submits the enclosed written notification of the identification of a defect, in accordance with the requirements of 10 CFR 21.21(d)(3)(ii), This notification pertains to the failure of the solenoid valve (model 38878-8) at Duke, Catawba.

Sincerely, r-:~<-:>~$/~n*d by:

l fu~M k.i"'- Villl 1'lioma§ "Kayn" Dills Quality Manager Flowserve Corp, Flow Control Division 1900 S, Saunders St Raleigh, NC 27603

Enclosures:

1. Plants/ customers potentially impacted

z. Reportable condition per 21.21(d)

3. Description of Evaluotlon cc:

Hylton Kipe - Director, Flowserve Plant Manager Matt Hobbs - Flowserve Engineering Manager Chuck Dowd - Director, Global Sales

~t!l'.%igh Clperatons 1900 South Saundors Street Rz!ei-;Jh, i'-JC 276C3

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 02/35 Flowserve Pa.rt 21 Evaluation Number: 105 Page 2

., RC Reportable Condition NC Not Caoable rn21.21 (bl)

Enclosure 1:

List of Plants/ Customers potentially Impacted:

• Duke - Catawba

• Luminant- Comanche Peak

• Exelon - Byron

• Exelon Braidwood

• NextEra Energy Seabrook O~::v2~:c,ji,;

1900 South S.aunde1s $tree:.

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 03/35 I

I DoduSlgn Envelope 10: 21 Cf 11 C3-1 AB2-4D1D-A501 -E07B7627177B FLOWS,......_., ERVE Enclosure 2: Reportable Condition per 21.21 (d) 10 CFR 21 REPORT 38878-8 Solenoid Valve at Duke, Catawba

1. Name and address of the Individual or individuals informing the Commission Kayn Dills Quality Manager Flowserve Corp, Flow Control Division 1900 S. Saunders St.

Raleigh, NC 27603

2. Identification of the facility, the activity, or the basic component supplied for such facility or such activity within the United States which contains a defect or noncompliance.

Duke Energy Carolinas, LLC (Duke Engergy)

Catawba Nuclear Station

3. Identification of the firm construction the facility or supplying the basic component which fails to comply or contains a defect Flowserve Corp, Flow Control Division 1900 S. Saunders St.

Raleigh, NC 27603

4. Nature of the defect or failure to. comply and the safety hazard to which Is created or could be created by such defect or failure to comply.

The solenoid valve received by Duke Energy failed to shuttle position when the. coil was initially energized. This solenoid valve is part of the feedwater isolation valve assembly and failure to shuttle. will prevent the feedwater isolation valve from closing on demand.

Ralei*;1h Operations 1 900 Qouth Saunders Street Ra1e!gh, NC ;27603

/ 11 / 2022 14: 00 9198332448 THE UPS STORE PAGE 04/35 Flowserve Part21 Evaluation Number: 105 Page 4

5. The date on which the information of such defect or failure to comply was obtained.

Flowserve was initially notified on September 11, 2022. Flowserve provided response to Duke (see Enclosure 4 of this report) on September 15, 2022 to confirm that Flowserve would perform the evaluation within 45 days upon receipt of the solenoid valve. Flowserve received the solenoid valve for evaluation on October 5, 2022.

6. In the case of a basic component which contains a defect or failure to comply, the number and location of these components in use at, supplied for, being supplied for, or may be supplied for, manufactured, or being manufactured for one or more facilities or activities subject to the regulations in this part.

The solenoid valves have been provided to various domestic nuclear plants with a known list contained within Enclosure 1 of this report.

7. The corrective action, which has been, is being, or will be taken; the name of the individual or organization responsible for the action; and length of time that has been or will be taken to complete the action.

See Enclosure 3 of this report. Flowserve will ( 1) revise the assembly and test procedure for the Model 38878 solenoid valve to add a final test after the thread lock component has been applied and been allowed to cure to verify the solenoid valve shifts when energized, and (2) provide training to assembly and test personnel on the importance of ensuring that excess thread lock compound has not been applied.

These actions will be completed by December 15, 2022

8. Any advica related to the defect or failure to comply about the facility, activity, or basic component that has been, is being, or will be given to purchasers or licensees.

See Enclosure 3 of this report. Nuclear power plants with model 38878 solenoid valves that have not undergone acceptance testing should verify that these suspect solenoid valves will shift on demand when energized.

9. In the case of an early site permit, the entities to whom an early site permit was transferred.

Not applicable.

R~leigh O~ereiticr;s 1900 Sou(h Saunders Street Ra:-aigh. ~~c 2'/:30;3

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 05/35 FLOWSERVE

' Flow Control Division Anchor/Darling Valves BWt/P Valves EdW<ird V~lves Vaffek Control Products Worcester Valves Enclosure 3: Description of Evaluation Flowserve US Inc Raleigh Opere1Ions Toll Fn,e: 1-B00-225-6989 Flow Control Division PO Box 1961 Phone: HJ19-832-/J525 1900 South Saunders Stri;~et Facsimile: 1-1119-831'1369 Raleigh, NC 27603 WWW .f:9.~~§@f't't2<!fT!

11/11/20 22 14:00 9198332448 THE UPS STORE PAGE 05/35 uuc,u<>11Jn Envelope ID; 21 CF11 C3-1AB2-4D1 D*A501-E07B7627177B Flow Control Division Anchor/Darling Valves FLOWSERVE BW!IP Valves Edward V~Jv*s Valtek Control Products Won:;ester Velvas Failure Analysis of 38878-8 Solenoid Valve Duke - Catawba Serial Number BT443 Complaint:

During pre-outage checks of a replacement solenoid fi:Jr our feedwater isolation valve (Model 38878-8),

technicians identified that a solenoid (S/N# BT 443) falled to shuttle when initially energized. While spool investigating the issue the solenoid was electrically cycled multiple times without shuttling of the approxim ately 1o minutes when it did finally shuttle. After this piece. II was left continuously powered for initial shuttle the SOV was shuttling when demanded but due to the suspect operation , the customer 6, 2016, considered it unusable. Serial number BT443 solenoid valve was assembled and tested on June as part of so 115795, line item 001, Duke Purchase Order 03014228-REV,001 .

valve to This solenoid valve is part of the actuator for the Feedwater Isolation Valve. Failure of this solenoid Valve.

shift when energized could result in the actuator not being able to close the Feedwater Isolation

~

Figure 1., Solenoid Cross-Section View As Received Condition:

10/27/2022:

Serial Number: 8T443 Coil Resistance: 293.6 ohms been Initial Visual Inspection: Verified solenoid valve serial number. The solenoid appears to have not installed and was in like new condition. Tamper evident paint on fasteners was intact.

FloW.seNe US Inc Raleigh Operations Toll Free: 1-<300,225-6989 PO aox 1961 Phono: 1-919-832-0525 Flow Control Division 1900 South Saunders Sire.et Facsimile: 1*919-831-3369 RalGigh, NC 27603 www,flowserve .coni

11/11/2022 I

14:00 9198332448 THE UPS STORE PAGE 07/35 Do 'usign o;nvolope ID; 21CF11C3-1AB2*4D1D-A501-E07B7627'177B Test per MS .97 92, FunctIonaITes tP roce d ures for 38878 S oenoi I dVIaves:

Para. Description U/M Min Max Recorded Value 632.5 Seat LeakaQe Test, De,enerQized Drop/10 Minutes 0 1 0 6.3.2.6 Seat LeakaQe Test, Energized Drop/10 Minutes 0 1 0 Solenoid valve shifted on demand with no delav.

6.3.2.8 Steady State Current, Energized Amps 0.37 0.45 0,38

@125 +I- 5 voe 6.4 External Leakaae Test ZERO 0 Removed End Cap (6) from Coil Assembly (10), Evidence of excess thread lock compound observed on threads of End Cap (6) and the Coil Assembly (10). Evidence of excess thread lock compound observed on the Coil Cap /5).

6,2,4,3 Gap between Coil Cap (5) and inches 0.0025 0.0035 Not Coil Assemblv (10} Measurement Measurable Excess thread lock compound on bottom of Coil Cap (5) and top of Coil Assembly (1 OJ orobabl)'. caused this discrepancy.

Removed Coil Assembly (10) from solenoid valve for inspection, Since the solenoid valve passed acceptance testing, further disassembly of the solenoid valve was considered unnecessary, Flowserve Us Inc Raleigh Oparatlon:1; Toll Free: 1-800-225-6959 Flow Control Division PO Box 1961 Phone: 1-919-!32-0525 1900 South Saunders Street Fac:sirnil8: 1~919"831"3369 Raleigh, NC 27603 www flowserw* r.om Page 2 of 30

11/11/20 22 14:00 9198332448 THE UPS STORE PAGE 08/35 Envelop* ID: 21 CF11 C3-1AB2-4D1D-A501-E07S7627177B on End Cap (6): Visual inspection showed no signs of damage. Excess thread lock compound observed threads and internal surfaces.

Rale!gh Op~rations Toll Free: 1*500-226-69$9 Flowoet\18 US Inc Flow Control Divk:ion PO Box 1961 Phone: 1*919-832--0525 1900 Sa~lh Saunde Street Fa,csimi!e; *1*919*B31*3369 R,leigh, NC 27603 ~w.f(gwservfi.qqrn Page 3 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 09/35 I

Doc'uSign Envelope ID: 21CF11C3-1AB2-4D1D-A501-E07B7627177B Figure 3: End Cap (6,I Threads FloWS8tve U S Inc Ra1eig'1 Opl;!rali<ins Toll Frae: 1-800*225-6989 FlrJw Con\rol Division PO Box 1961 Phone: 1-819-832-0525 1900 South Saunders Street Fecslmlle: Hl19-831-3369 Raleigh, NC 27603 WWW flOWSP.Nf!.com Page 4 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 10/35 ooduSign Envelop* ID: 21CF11 C3-1ABZ-4D1D-A501-la07B7627177B Fi_qure 4: End Cap (6) Internal Flowserve U S Inc Raleigh Qpera.tians Toll Free: 1-800-125-6989 Flow Control Division PO Box 1961 Phone: 1-919-332-0525 1900 South Saunders Slri11Qt Facoimile: 1-919-!31-3369 Raleigh, NC 27603 www.t1gwsarvt1.corq Page 5 of 3

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 11/35 DolSign Ecnvalope ID; 21CF11C3-1AB2-4D1D-M01-E07B7627177B Figure S: End Cap (6) Internal Flowserve U $ ltiC Raleigh Opefat101is Toll Free: 1-1300-225*6989 Flow Control Division PO Bax 1961 Phone: 1-919-832-0525

%JOO Sou1h Saunders Stree( Fao,imlle: 1-919.S31-3369 Ral*igh, NC 27603 www.f1QWSP.IY!1 mm Page 6 of 30

11/11/20 22 14:00 9198332448 THE UPS STORE PAGE 12/35 Fi91,:,e 6: End Cap (6) Under UV Light Raleigh Operations Toll Free: H!00-225-6989 FlowseP/e Us Inc Flow Control Divii;ion PO Bo, 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-!31-3369 Ra~~h, NC 27603 www.flpwserve.com Page 7 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 13/35 i

I Do uSlgn Envelope ltlc 21 CF11 C3-1AB2-4D1D-A501-E07S7627177B F",gure 7: End Cap (6:J, UV Light,, Inside Diameter Flows1;;rve U S Inc Raleigh Qper1:1tions Toll Fr**: 1-800-225-6989 Fklw Control Dlv1sion PO Box 1961 Phone: 1..g19-832-0525 1900 South Sau.mdars Street Fecsimlle: 1-919-831-3369 Raleigh, NC 27603 www.flow~erve r:om Page 8 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 14/35 Figure 8: Emf Cap (6),. UV Light Threads Flowserve u S Inc Raleigh Qparatiohs Toll Free; 1-800-225-6989 Flow Control Division PO Box 1961 Phone; Hl19-832--0525 1900 South Saunders Stree1 Facsimile: 1*919,..831..$369 Raleigh, NC 27603 www flgwsetve mm Page 9 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 15/35 I

Do~uSlgn Envelope ID: 21CF11C3-1AB2-4O1D*A50H,07B7627177B Figure 9: End Cap (6) UV L{tJht Internal Flowser1;i U S 1nc Raleigh Operatfon!:I Toll Free: 1-800-225-6989 Flow Control Division PO Box 1961 Phone: 1-il1S-!132-<1525 1900 Sou1h Saundera Streat Facsimile: 1..919,.831*3369 Raleigh, NC 27603 www,fl(~wserv"' corn Page 10 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 16/35 DociuSign Envelope ID: 21CF11G3-1AB2-4D1D-A501-E07B7627177B Coil Cap (5): Visual inspection showed no signs of damage. Excess thread lock compound observed on top, bottom near the outside diameter and side.

Rgure 10: Cot1 Ci;p (5) Top Flowserve lJ S Inc Rale.igh Operations Toll Free: 1-800,125*6989 Flow Control Division PO Bo, 1961 Phone: H19-332-D525 1900 South Saunders Street F*o,imile; 1-B19-B31-3369 Raleigh, NC 27603 www.tlowsew mm Page 11 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 17/35 DoduSign Envelope ID: 21 CF11 C3-1AB2-4D1D-A501 *EO7B76~71710 I

I I

Figure 11: Coil C/Jp (5) Top F1ow,eN* Us Inc Raleigh Operations TOIi Free: 1-800-225-6989 Flow Control Divisio~ PO Box 1961 Phone, 1-919-83'-0525 19D0 South Saunders Street Facsimile; 1-919-831-3369 Ral*igh, NC 27603 'MW-flawi,erve.ct11t1 Page 12 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 18/35 i

DocuSign e:nvelope ID: 21 CF11 C3-1AB2-4D10-A501-E07B7627177B Figure 12: Coil Cap (5) Bottom F!owser1:! LI s Inc Raleigh Operntlons Toll Free: 1°601).225-6989 Flow .Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Streo( Fac,imilo; l-919-831-3369 Raleigh, NC 27603 www.flc,wservt1.corri Page 13 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 19/35 Figure 13: Cot7 Cap (S) Bottom Flowserve LI s Im; R1:1lei9h Operatiohs Toll Frea: 1-300~225-6989 Flow Co11trol Division PO Box 1961 Phone: 1~919-832-0525 1900 South Saunders Street Faosirnile: 1~919-831..3369 Raleigh, NC 27603 w-NW.f1d1t/S\:!Ne.corn Page 14 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 20/35 i

DobuSlgn Envelope ID; 21CF11C3-1AB2-4D1P-M01-1"07B7627177B I

Figure 14: Coil C;;ip (5) Bottom Flowserve U S Inc Raleigh Operatiom:i Tott Freo 1.aoo-225-,3939 Flow Coritrol Divi('lion PO Box 1961 Phone: 1-919-832-0525 1900 South S!ilundera Street F:::icsimile: 1-919-831-3369 Raleigh, NC 27603 www.flows.irve.com

• Page 15 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 21/35 DocLSign Envelope ID, 21CF11C3-1AB2-4D1D-M01-E07B7627177B Figure 15: Coll O;p (5) Sidi" FlowsetVe U S Inc Raleigh Operations Toll Free: 1-800-225-6968 Flaw Cor'lttol Division PO Box 1961 Phone, 1-919-832-0525 1900 South Saundera Street Fac,imile: 1-919-831"3369 Raleigh, NC 27603 www.flowSliltJ'..tUOOl Page 16 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 22/35 Doou$Ign Envelopa ID: 21CF11C3-1AB2-4D1tJ-A501-E07El7~27177B Figure 16: Coil Cap (5) Side Raleigh Operations Toll Fraa: 1-800~225-61189 Flowserve U$ lm; Flow Control Divisior, PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimila: 1-919-831-3369 Ralaigh, NC 27603 'www flQ.Wserve.rmm Page 17 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 23/35 DobuSlgn Envelope IIJ: 21 CF11 C3-1AB2-4P1 P-A501-E07B76271776 I

Figure 17, Coil Cap (5) Side Flr.:iwsarve U S Inc Ralalgt) Operations TOIi Fre*: l-500-22,-1)989 rlow Control Division PO Box 1961 Phone: 1-919-832--0525 1900 South Saunders Street Facoirnile: 1-919-831-3369 R.alei9h, NC 27603 www .flowserve.corr, Page 18 of 30

11/11/20 22 14:00 9198332448 THE UPS STORE PAGE 24/35 Doc~Sign Envelope ID: 21CF11C3-1Aa2-4D1D-A601-E07B7627177B I

Figure 18: Coil Cap (5) Bottom UV light Flowserve U S Inc Raleigh Operations Toll Free: H~00-225-6989 PO Box 19t'l1 Phone: 1-919-832.-0525 flow Control Division 1900 Souih Saund~rs Street Facsimile: 1-919-131-3369 R,leigh, NG 27603 www.flowserve.r.:om Page 19 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 25/35 Doc~Sign Envelope 1 , 21CF11C3-1AB2-4D1D-A501-E07B7627177B Figure 19: Coll cap /5) f3ottom UV Light f=loW$1l:r'ie US Inc Ralalgh Operations Toll Fres: 1*600*225{)9$9 Fklw Control Division PO Sox 1961 Phone: 1-919*832-0525 1900 South Sau.nders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 wwwflowsarva.c:orr, Page 20 of 30

11/11/20 22 14:00 9198332448 THE UPS STORE PAGE 25/35 Doo~Slgn Envelope ID: 21CF11C3-1Aa2-4D1D-A501-E07B76271778 I

I Flowserve LI s Inc Raleigh operations TOIi rree: 1,I00-225-6989 Flow Control Division PO Box 1861 Phone: 1-919-S32-6525 1900 South Saundern Street Facsimile; 1-919-831-3369 Raleigh, NC 27o03 WWW flpw5arve.corr*1 Page 21 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 27/35 CF11 C3-1AB2*4D1 P-A501-E07B7627177a Figµre 22; Coil Cap (5) Top UV Light Flowsarte US Inc RalQlgh Operation!; Toll Free: 1-800-225-6989 Flow Control Division PO Sox 1961 Phone: 1-91 ~832-0525 1900 South Sounder, Street Faosimile; 1-919-831-3369 Raleigh, NC ,7603 www.flc,ws~rvs.com Page 22 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 28/35 DoriuSign Envelope ID: 21CF11C3-1AB2-4D1D-A501-E07B7627177B Rod, Spool Adjustment: Visual examination showed no signs of damage.

Flowser,e U S Inc Raleigh Operations Toll Free: 1-800-:225-6989 Flow Control Division PO Box 1961 . Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831,3369 Raleigh, NC 27603 w-Nw.flowMrve.c.gm Page 23 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 29/35 DoouS;gn Envelope ID: 21CF11C3**1AB2"4[;)1 D-A501-E07B7627177B I

I Coil Assembly (10): Visual examination showed no signs of damage. Excess thread lock compound observed on top surface in the area of the gap between the Coil Assembly (10) and the Coil Cap (5).

Flowserve VS lno Raleigh Operations Toll Fraa: 1~300~225-6989 Flow Control Division PO Box 1961 Phone: 1-919-832-'1525 1900 Sowth Saunders Street Facsimile: 1-919-$31..3369 Raleigh, NC 27603 www.flowsery1;.cpn1 Page 24 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 30/35 i

Do9uSign Envelope ID: 21CF11C3-1Aa2-4D1D-A501-E07El7627177B Figure :Z5: Coil Assembly (10) Top Flowscrvo U S Inc Ralolgh Operations Toll Free: 1-800-215-6989 Flow Cor1trol Division PO Box 1961 Phono: 1-919-832-0525 1900 South Saunders Street Facslmllo: 1-919-831-3369 Raleigh, NC 27603 WWW froWO:P.(Yf! r-om Page 25 of 30

11/11/20 22 14:00 9198332448 THE UPS STORE PAGE 31/35 OocuSign Env~\ope ID: ,11CF11C3-1AB2-4D1D*A501-E07B7627177a Raleigh Operati0l'IS Tall Froo: 1-800-226-6989 Flowserve U S Inc PO Box 1961 Phon*: 1-919~32--0525 Flow Control Division 1900 So1,1th Saunders Street Facsimile: 1-919-831-3369 Rai,igh, NC 27603 www ftQWservR.qom Page 26 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 32/35 Do6uSign Envelope ID: 21 CF11 C3-1A82-4D1 D-A5QH,07B7627177B Figure 27: Coil Assembly (10) Top UV light Flowserve Us Inc Raleigh Operations Toll Free: 1-800-225-6989 Flow Control Division PO Bo, 1961 Phane: 1-919-832-0525 1900 South Saunders Street Fmimile: 1"919-831-3369 Raleigh, NC 27603 'N'NW fklW"!P.fVI> cam Page 27 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 33/35 DocuSign Env*lope ID: 21CF11C3-1AB2-4D1D-A501-E07B76271778 Figure 28: Coil Assembly (10) Top UV Light Root Cause of Failure:

During Flowserve's investigation into the root cause of the solenoid valve failure, Flowserve was unable to replicate this failure. Based on ex.amination of the solenoid valve components, excess thread lock compound had been applied to the Set Screw (16) and Nut (18) on the Coil Cap (5). The excess thread lock compound then ran down the Coil Cap (5) and wicked between the Coil Cap (5) outside diameter and the End Cap (6) inside diameter. Once this excess thread lock compound cured, the Coil Cap (5) was locked in the de-energized position, preventing the Coil Cap (5) from shifting. After the customer left the solenoid valve energized for 10 minutes, the Coil Cap (5) broke free from de-energized position and was able to shift freely. In the procedure for assembly and testing of this solenoid valve, the solenoid valve is not energized after application of the thread lock compound.

Flow3erve U S Inc Ralalgh Operations Toll Froe: 1-800-225-8989 Flow Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South $~1. mder;1 Street Facsimile: 1-919-B31-3369 Raleigh, NC 27603 www.flowservs.oom Page 28 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 34/35 DoduSign Envelope ID: 21CF11C3-1AB2-4D1D-A501-E07B76271778 I

r0

/

Excess TI1n:ad Lock Compoun d Observed in 111ese Areas Figure 2'!?: Areas Where Exross Thr~ad lock Compound was Observed Extent of Condition; All model 38878 solenoid valves that have not undergone testing after receipt by nuclear power plant customers.

Proposed Corrective Actions (Short Term);

Nuclear Power Plant Customers with model 38878 solenoid vaives that have not undergone acceptance testing should verify that these suspect solenoid valves will shift on demand when energized.

Proposed Corrective Actions (Long Term):

Provide training to assembly and test personnel on the importance of ensuring that excess thread lock compound has not been applied. The assembly and test procedure for the Model 38878 solenoid valves will be revised to add a final test after the thread lock compound has been applied and been allowed to cure to verify the solenoid valve shifts when energized.

F1owseive u s Inc Ra~igh Operations Toll Free: 1-ll0o-225*6989 Flow Canirol Division PO Box 1961 Phon<: 1,919-832-0525 190D Scuth Saunders Street Facsimile; 1-919-831-3369 Raleigh, NC 27603 WWW flawwrva.com Page 29 of 30

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 35/35 DoouSlgn Envelope ID: 21CF11C3-IAB2-4D10-A501-Ea0767627177B I

i Evaluated By:

R. A. Sizemore, PE 11/7/2022 Engineering Specialist F!owser11i u S Inc Raleigh Operations Toll Free: 1-800-225-6989 Flow Control Division PO Box 1961 Phono: 1-919-832-0525 1900 South Sal.lnders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 www Oowsf!rve.aarn Page 30 of 30