ML102180369

OL - Fyi: for Your Action - Watts Bar Unit 2 - GL 1995-07

ML102180369
Person / Time
Site:	Watts Bar
Issue date:	07/28/2010
From:	Office of Nuclear Reactor Regulation
To:	Division of Operating Reactor Licensing
References
Download: ML102180369 (3)

Text

1 WBN2Public Resource From:

Lamb, John Sent:

Wednesday, July 28, 2010 8:12 PM To:

McMurtray, Anthony; Farnan, Michael Cc:

Raghavan, Rags; Milano, Patrick; Campbell, Stephen; Wiebe, Joel; WBN2HearingFile Resource

Subject:

FYI: For Your Action - Watts Bar Unit 2 - GL 1995-07 From: Crouch, William D [1]

Sent: Wednesday, July 28, 2010 4:09 PM To: Lamb, John; Wiebe, Joel; Poole, Justin; Milano, Patrick Cc: Arent, Gordon; Thompson, Jeffery S; Freeman, Edwin E; Pointer, Kenneth; Stephenson, Catherine L

Subject:

RE: For Your Action - Watts Bar Unit 2 - GL 1995-07

Inresponsetoyouremail(below)datedJuly8,2010,thebelowresponseisprovided.Ifyouhaveanyquestions,please givemeacall.Ifyouneedthesesubmittedformally,pleaseletmeknow.

William D. (Bill) Crouch (423)3652004WBN (256)7777676Cell

Question:Regarding Watts Bar Unit 2 response to GL 1995-07 for pressure locking/thermal binding, please:

1) Listthevalvesthatrequiremodifications:

Answer:The9507reviewofWBNUnit2GL8910motoroperatedvalveshasbeencompletedwiththefollowing conclusions.

Eleven valves identified for Disk Modification

1. 2-FCV-1-16

2. 2-FCV-63-8

3. 2-FCV-63-11

4. 2-FCV-63-156

5. 2-FCV-63-157

6. 2-FCV-74-1

7. 2-FCV-74-2

8. 2-FCV-74-8

9. 2-FCV-74-9

10. 2-FCV-74-33

11. 2-FCV-74-35 Seven valves identified for Valve Bonnet Modification

1. 2-FCV-63-72

2. 2-FCV-63-73

3. 2-FCV-63-172

4. 2-FCV-72-40

5. 2-FCV-72-41

6. 2-FCV-72-44

7. 2-FCV-72-45

2 Additionally,controlsforvalves2FCV722and39willbemodifiedtoaddatimedelaywhichwilleliminatethe potentialforpressurelocking,asisdonewithUnit1valves1FCV722and39.Notethisisacontrolsmodandnota valvemodification.

2) Listthevalvesthataremissing:

Answer:TherearenomissingGenericLetter9507valves.The20valvesidentifiedabovearecurrentlyinstalledinWBN Unit2.

3) HastherebeenanyplantmodificationsthathavechangedtheoriginalassessmentforWattsBarUnit1andthe impactonWattsBarUnit2?

Answer:Inadditiontothetimedelaychangesmentionedabove,thereare2otherUnit1valves1FCV6325and26, whicharebeingevaluatedforGL9507impactstoaddressnewinputparametersfromtheJOGTopicalReportMPR 2524A.Unit1hasinitiatedadesignchangetoaddressJOGpressurelockingandMOVrequirements.Thesechangeswill beevaluatedforimpacttotheequivalentUnit2valves2FCV6325and26.

From: Lamb, John [2]

Sent: Thursday, July 08, 2010 11:08 AM To: Crouch, William D; Arent, Gordon Cc: WBN2HearingFile Resource; Wiebe, Joel; Raghavan, Rags; Milano, Patrick; Haag, Robert; Campbell, Stephen

Subject:

For Your Action - Watts Bar Unit 2 - GL 1995-07 Importance: High

Bill & Gordon, Regarding Watts Bar Unit 2 response to GL 1995-07 for pressure locking/thermal binding, please

1. list the valves that require modifications,

2. list the valves that are missing, and

3. has there been any plant modifications that have changed the original assessment for Watts Bar Unit 1 and the impact on Watts Bar Unit 2?

Thanks.

John

Hearing Identifier:

Watts_Bar_2_Operating_LA_Public Email Number:

51 Mail Envelope Properties (BE1CC4A72435624D84F8699734202B3E1FAEF9383B)

Subject:

FYI: For Your Action - Watts Bar Unit 2 - GL 1995-07 Sent Date:

7/28/2010 8:12:27 PM Received Date:

7/28/2010 8:12:28 PM From:

Lamb, John Created By:

John.Lamb@nrc.gov Recipients:

"Raghavan, Rags" <Rags.Raghavan@nrc.gov>

Tracking Status: None "Milano, Patrick" <Patrick.Milano@nrc.gov>

Tracking Status: None "Campbell, Stephen" <Stephen.Campbell@nrc.gov>

Tracking Status: None "Wiebe, Joel" <Joel.Wiebe@nrc.gov>

Tracking Status: None "WBN2HearingFile Resource" <WBN2HearingFile.Resource@nrc.gov>

Tracking Status: None "McMurtray, Anthony" <Anthony.McMurtray@nrc.gov>

Tracking Status: None "Farnan, Michael" <Michael.Farnan@nrc.gov>

Tracking Status: None Post Office:

HQCLSTR01.nrc.gov Files Size Date & Time MESSAGE 3199 7/28/2010 8:12:28 PM Options Priority:

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