ML22319A094

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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)
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Text

11/11/2022 14:00 9198332448 THE UPS STORE Do uSign Envelope ID: i1CF11C3-1AB2-4D1D 0A501-E07B7627177B 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 PAGE 01/35 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 RC Reportable Condition NC Not Caoable rn21.21 (bl)

THE UPS STORE PAGE 02/35 :

Flowserve Pa.rt 21 Evaluation Number: 105 Page 2 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 FLOWSERVE

,......_., : 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 FLOWSERVE : Description of Evaluation Flowserve U S Inc Flow Control Division Raleigh Opere1Ions PO Box 1961 1900 South Saunders Stri;~et Raleigh, NC 27603 PAGE 05/35 Flow Control Division Anchor/Darling Valves BWt/P Valves EdW<ird V~lves Vaffek Control Products Worcester Valves Toll Fn,e:

1-B00-225-6989 Phone:

HJ19-832-/J525 Facsimile: 1-1119-831'1369 WWW.f:9.~~§@f't't2<!fT!

11/11/2022 14:00 9198332448 THE UPS STORE uuc,u<>11Jn Envelope ID; 21 CF11 C3-1AB2-4D1 D*A501-E07B7627177B FLOWSERVE Complaint:

Failure Analysis of 38878-8 Solenoid Valve Duke - Catawba Serial Number BT443 PAGE 05/35 Flow Control Division Anchor/Darling Valves BW!IP Valves Edward V~Jv*s Valtek Control Products Won:;ester Velvas 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 investigating the issue the solenoid was electrically cycled multiple times without shuttling of the spool piece. II was left continuously powered for approximately 1 o minutes when it did finally shuttle. After this initial shuttle the SOV was shuttling when demanded but due to the suspect operation, the customer considered it unusable. Serial number BT443 solenoid valve was assembled and tested on June 6, 2016, as part of so 115795, line item 001, Duke Purchase Order 03014228-REV,001.

This solenoid valve is part of the actuator for the Feedwater Isolation Valve. Failure of this solenoid valve to shift when energized could result in the actuator not being able to close the Feedwater Isolation Valve.

~

As Received Condition:

10/27/2022:

Serial Number:

8T443 Coil Resistance:

293.6 ohms Figure 1., Solenoid Cross-Section View Initial Visual Inspection: Verified solenoid valve serial number. The solenoid appears to have not been installed and was in like new condition. Tamper evident paint on fasteners was intact.

FloW.seNe U S Inc Flow Control Division Raleigh Operations PO aox 1961 1900 South Saunders Sire.et RalGigh, NC 27603 Toll Free:

1-<300,225-6989 Phono:

1-919-832-0525 Facsimile: 1*919-831-3369 www,flowserve.coni

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 07/35 I

Do 'usign o;nvolope ID; 21CF11C3-1AB2*4D1D-A501-E07B7627'177B Test per MS 97

. 92, FunctIona IT tP es roce d ures or oenoi f

38878 S I dVI aves:

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 U s Inc Flow Control Division Page 2 of 30 Raleigh Oparatlon:1; PO Box 1961 1900 South Saunders Street Raleigh, NC 27603 Toll Free:

1-800-225-6959 Phone:

1-919-!32-0525 Fac:sirnil8: 1~919"831"3369 www flowserw* r.om

11/11/2022 14:00 9198332448 THE UPS STORE PAGE 08/35 Envelop* ID: 21 CF11 C3-1AB2-4D1D-A501-E07S7627177B End Cap (6): Visual inspection showed no signs of damage. Excess thread lock compound observed on threads and internal surfaces.

Flowoet\18 U S Inc Flow Control Divk:ion Page 3 of 30 Rale!gh Op~rations PO Box 1961 1900 Sa~lh Saunde Street R,leigh, NC 27603 Toll Free:

1*500-226-69$9 Phone:

1*919-832--0525 Fa,csimi!e; *1*919*B31*3369

~w.f(gwservfi.qqrn

11/11/2022 14:00 9198332448 THE UPS STORE I

Doc'uSign Envelope ID: 21CF11C3-1AB2-4D1D-A501-E07B7627177B FloWS8tve U S Inc FlrJw Con\rol Division Page 4 of 30 Figure 3: End Cap (6,I Threads Ra1eig'1 Opl;!rali<ins PO Box 1961 1900 South Saunders Street Raleigh, NC 27603 Toll Frae:

1-800*225-6989 Phone:

1-819-832-0525 Fecslmlle: Hl19-831-3369 WWW flOWSP.Nf!.com PAGE 09/35

11/11/2022 14:00 9198332448 THE UPS STORE ooduSign Envelop* ID: 21CF11 C3-1ABZ-4D1D-A501-la07B7627177B Flowserve U S Inc Flow Control Division Page 5 of 3 Fi_qure 4: End Cap (6) Internal Raleigh Qpera.tians PO Box 1961 1900 South Saunders Slri11Qt Raleigh, NC 27603 Toll Free:

1-800-125-6989 Phone:

1-919-332-0525 Facoimile: 1-919-!31-3369 www.t1gwsarvt1.corq PAGE 10/35

11/11/2022 14:00 9198332448 THE UPS STORE DolSign Ecnvalope ID; 21CF11C3-1AB2-4D1D-M01-E07B7627177B Flowserve U $ ltiC Flow Control Division Page 6 of 30 Figure S: End Cap (6) Internal Raleigh Opefat101is PO Bax 1961

%JOO Sou1h Saunders Stree(

Ral*igh, NC 27603 Toll Free:

1-1300-225*6989 Phone:

1-919-832-0525 Fao,imlle: 1-919.S31-3369 www.f1QWSP.IY!1 mm PAGE 11/35

11/11/2022 14:00 FlowseP/e U s Inc Flow Control Divii;ion Page 7 of 30 9198332448 THE UPS STORE Fi91,:,e 6: End Cap (6) Under UV Light Raleigh Operations PO Bo, 1961 1900 South Saunders Street Ra~~h, NC 27603 Toll Free:

H!00-225-6989 Phone:

1-919-832-0525 Facsimile: 1-919-!31-3369 www.flpwserve.com PAGE 12/35

11/11/2022 14:00 9198332448 THE UPS STORE i

Do I uSlgn Envelope ltlc 21 CF11 C3-1AB2-4D1D-A501-E07S7627177B Flows1;;rve U S Inc Fklw Control Dlv1sion Page 8 of 30 F",gure 7: End Cap (6:J, UV Light,, Inside Diameter Raleigh Qper1:1tions PO Box 1961 1900 South Sau.mdars Street Raleigh, NC 27603 Toll Fr**:

1-800-225-6989 Phone:

1..g19-832-0525 Fecsimlle: 1-919-831-3369 www.flow~erve r:om PAGE 13/35

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

11/11/2022 14:00 9198332448 THE UPS STORE I

Do~uSlgn Envelope ID: 21CF11C3-1AB2-4O1D*A50H,07B7627177B Flowser1;i U S 1nc Flow Control Division Page 10 of 30 Figure 9: End Cap (6) UV L{tJht Internal Raleigh Operatfon!:I PO Box 1961 1900 Sou1h Saundera Streat Raleigh, NC 27603 Toll Free:

1-800-225-6989 Phone:

1-il1S-!132-<1525 Facsimile: 1..919,.831*3369 www,fl(~wserv"' corn PAGE 15/35

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.

Flowserve lJ S Inc Flow Control Division Page 11 of 30 Rgure 10: Cot1 Ci;p (5) Top Rale.igh Operations PO Bo, 1961 1900 South Saunders Street Raleigh, NC 27603 Toll Free:

1-800,125*6989 Phone:

H19-332-D525 F*o,imile; 1-B19-B31-3369 www.tlowsew mm

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

I I

F1ow,eN* U s Inc Flow Control Divisio~

Page 12 of 30 Figure 11: Coil C/Jp (5) Top Raleigh Operations PO Box 1961 19D0 South Saunders Street Ral*igh, NC 27603 TOIi Free:

1-800-225-6989

Phone, 1-919-83'-0525 Facsimile; 1-919-831-3369

'MW-flawi,erve.ct11t1 PAGE 17/35

11/11/2022 14:00 9198332448 THE UPS STORE i

DocuSign e:nvelope ID: 21 CF11 C3-1AB2-4D10-A501-E07B7627177B F!owser1:! LI s Inc Flow.Control Division Page 13 of 30 Figure 12: Coil Cap (5) Bottom Raleigh Operntlons PO Box 1961 1900 South Saunders Streo(

Raleigh, NC 27603 Toll Free:

1°601).225-6989 Phone:

1-919-832-0525 Fac,imilo; l-919-831-3369 www.flc,wservt1.corri PAGE 18/35

11/11/2022 14:00 Flowserve LI s Im; Flow Co11trol Division Page 14 of 30 9198332448 THE UPS STORE Figure 13: Cot7 Cap (S) Bottom R1:1lei9h Operatiohs PO Box 1961 1900 South Saunders Street Raleigh, NC 27603 Toll Frea:

1-300~225-6989 Phone:

1~919-832-0525 Faosirnile: 1~919-831..3369 w-NW.f1d1t/S\:!Ne.corn PAGE 19/35

11/11/2022 14:00 9198332448 THE UPS STORE i

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

Flowserve U S Inc Flow Coritrol Divi('lion Page 15 of 30 Figure 14: Coil C;;ip (5) Bottom Raleigh Operatiom:i PO Box 1961 1900 South S!ilundera Street Raleigh, NC 27603 Tott Freo 1.aoo-225-,3939 Phone:

1-919-832-0525 F:::icsimile:

1-919-831-3369 www.flows.irve.com

  • PAGE 20/35

11/11/2022 14:00 9198332448 THE UPS STORE DocLSign Envelope ID, 21CF11C3-1AB2-4D1D-M01-E07B7627177B FlowsetVe U S Inc Flaw Cor'lttol Division Page 16 of 30 Figure 15: Coll O;p (5) Sidi" Raleigh Operations PO Box 1961 1900 South Saundera Street Raleigh, NC 27603 Toll Free:

1-800-225-6968

Phone, 1-919-832-0525 Fac,imile: 1-919-831"3369 www.flowSliltJ'..tUOOl PAGE 21/35

11/11/2022 14:00 9198332448 THE UPS STORE Doou$Ign Envelopa ID: 21CF11C3-1AB2-4D1tJ-A501-E07El7~27177B Flowserve U $ lm; Flow Control Divisior, Page 17 of 30 Figure 16: Coil Cap (5) Side Raleigh Operations PO Box 1961 1900 South Saunders Street Ralaigh, NC 27603 Toll Fraa:

1-800~225-61189 Phone:

1-919-832-0525 Facsimila: 1-919-831-3369

'www flQ.Wserve.rmm PAGE 22/35

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

Flr.:iwsarve U S Inc rlow Control Division Page 18 of 30 Figure 17, Coil Cap (5) Side Ralalgt) Operations PO Box 1961 1900 South Saunders Street R.alei9h, NC 27603 TOIi Fre*:

l-500-22,-1)989 Phone:

1-919-832--0525 Facoirnile: 1-919-831-3369 www.flowserve.corr, PAGE 23/35

11/11/2022 14:00 9198332448 THE UPS STORE Doc~Sign Envelope ID: 21CF11C3-1Aa2-4D1D-A601-E07B7627177B I

Flowserve U S Inc flow Control Division Page 19 of 30 Figure 18: Coil Cap (5) Bottom UV light Raleigh Operations PO Box 19t'l1 1900 Souih Saund~rs Street R,leigh, NG 27603 Toll Free:

H~00-225-6989 Phone:

1-919-832.-0525 Facsimile: 1-919-131-3369 www.flowserve.r.:om PAGE 24/35

11/11/2022 14:00 9198332448 THE UPS STORE Doc~Sign Envelope 1, 21CF11C3-1AB2-4D1D-A501-E07B7627177B f=loW$1l:r'ie US Inc Fklw Control Division Page 20 of 30 Figure 19: Coll cap /5) f3ottom UV Light Ralalgh Operations PO Sox 1961 1900 South Sau.nders Street Raleigh, NC 27603 Toll Fres:

1 *600*225{)9$9 Phone:

1-919*832-0525 Facsimile: 1-919-831-3369 wwwflowsarva.c:orr, PAGE 25/35

11/11/2022 14:00 9198332448 THE UPS STORE Doo~Slgn Envelope ID: 21CF11C3-1Aa2-4D1D-A501-E07B76271778 I

I Flowserve LI s Inc Flow Control Division Page 21 of 30 Raleigh operations PO Box 1861 1900 South Saundern Street Raleigh, NC 27o03 TOIi rree:

1,I00-225-6989 Phone:

1-919-S32-6525 Facsimile; 1-919-831-3369 WWW flpw5arve.corr*1 PAGE 25/35

11/11/2022 14:00 9198332448 THE UPS STORE CF11 C3-1AB2*4D1 P-A501-E07B7627177a Flowsarte U S Inc Flow Control Division Page 22 of 30 Figµre 22; Coil Cap (5) Top UV Light RalQlgh Operation!;

PO Sox 1961 1900 South Sounder, Street Raleigh, NC,7603 Toll Free:

1-800-225-6989 Phone:

1-91 ~832-0525 Faosimile; 1-919-831-3369 www.flc,ws~rvs.com PAGE 27/35

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

Flowser,e U S Inc Flow Control Division Page 23 of 30 Raleigh Operations PO Box 1961.

1900 South Saunders Street Raleigh, NC 27603 Toll Free:

1-800-:225-6989 Phone:

1-919-832-0525 Facsimile: 1-919-831,3369 w-Nw.flowMrve.c.gm PAGE 28/35

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 Flow Control Division Page 24 of 30 Raleigh Operations PO Box 1961 1900 Sowth Saunders Street Raleigh, NC 27603 Toll Fraa:

1~300~225-6989 Phone:

1-919-832-'1525 Facsimile: 1-919-$31..3369 www.flowsery1;.cpn1

11/11/2022 14:00 9198332448 THE UPS STORE i

Do9uSign Envelope ID: 21CF11C3-1Aa2-4D1D-A501-E07El7627177B Flowscrvo U S Inc Flow Cor1trol Division Page 25 of 30 Figure :Z5: Coil Assembly (10) Top Ralolgh Operations PO Box 1961 1900 South Saunders Street Raleigh, NC 27603 Toll Free:

1-800-215-6989 Phono:

1-919-832-0525 Facslmllo: 1-919-831-3369 WWW froWO:P.(Yf! r-om PAGE 30/35

11/11/2022 14:00 9198332448 THE UPS STORE OocuSign Env~\ope ID:,11CF11C3-1AB2-4D1D*A501-E07B7627177a Flowserve U S Inc Flow Control Division Page 26 of 30 Raleigh Operati0l'IS PO Box 1961 1900 So1,1th Saunders Street Rai,igh, NC 27603 Tall Froo:

1-800-226-6989 Phon*:

1-919~32--0525 Facsimile: 1-919-831-3369 www ftQWservR.qom PAGE 31/35

11/11/2022 14:00 9198332448 THE UPS STORE Do6uSign Envelope ID: 21 CF11 C3-1A82-4D1 D-A5QH,07B7627177B Flowserve Us Inc Flow Control Division Page 27 of 30 Figure 27: Coil Assembly (10) Top UV light Raleigh Operations PO Bo, 1961 1900 South Saunders Street Raleigh, NC 27603 Toll Free:

1-800-225-6989 Phane:

1-919-832-0525 Fmimile: 1"919-831-3369

'N'NW fklW"!P.fVI> cam PAGE 32/35

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

PAGE 33/35 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 Flow Control Division Page 28 of 30 Ralalgh Operations PO Box 1961 1900 South $~1.. mder;1 Street Raleigh, NC 27603 Toll Froe:

1-800-225-8989 Phone:

1-919-832-0525 Facsimile: 1-919-B31-3369 www.flowservs.oom

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

' I Extent of Condition; r0

/

Excess TI1n:ad Lock Compound Observed in 111ese Areas Figure 2'!?: Areas Where Exross Thr~ad lock Compound was Observed 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 Flow Canirol Division Page 29 of 30 Ra~igh Operations PO Box 1961 190D Scuth Saunders Street Raleigh, NC 27603 Toll Free:

1-ll0o-225*6989 Phon<:

1,919-832-0525 Facsimile; 1-919-831-3369 WWW flawwrva.com

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

i Evaluated By:

R. A. Sizemore, PE Engineering Specialist F!owser11i u S Inc Flow Control Division Page 30 of 30 11/7/2022 Raleigh Operations PO Box 1961 1900 South Sal.lnders Street Raleigh, NC 27603 Toll Free:

1-800-225-6989 Phono:

1-919-832-0525 Facsimile: 1-919-831-3369 www Oowsf!rve.aarn PAGE 35/35

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