ML110590349

Lr - Regional Inspection Spreadsheet

ML110590349
Person / Time
Site:	Diablo Canyon
Issue date:	10/27/2010
From:	NRC Region 4
To:	Division of License Renewal
References
Download: ML110590349 (3)

Text

DiabloCanyonNPEm Resource From: Pick, Greg Sent: Wednesday, October 27, 2010 12:07 PM To: Tan, Miranda Cc: DiabloCanyonNPEm Resource

Subject:

RE: Regional Inspection Spreadsheet Attachments: Diablo Canyon Documents Needed 10-17-2010.doc See the attached questions from review of Closed Cooling Water, Open Cycle Cooling Water & FO Chemistry From: Tan, Miranda [1]

Sent: Wednesday, October 27, 2010 8:14 AM To: Pick, Greg Cc: Grebel, Terence

Subject:

Regional Inspection Spreadsheet

Greg, Attached is the regional inspection spreadsheet.

Best, Miranda Tan 805 781 9415

<<NRC Regional Inspection QA Spreadsheet 102610.xls>>

1

Hearing Identifier: DiabloCanyon_LicenseRenewal_NonPublic Email Number: 2625 Mail Envelope Properties (Greg.Pick@nrc.gov20101027120600)

Subject:

RE: Regional Inspection Spreadsheet Sent Date: 10/27/2010 12:06:49 PM Received Date: 10/27/2010 12:06:00 PM From: Pick, Greg Created By: Greg.Pick@nrc.gov Recipients:

"DiabloCanyonNPEm Resource" <DiabloCanyonNPEm.Resource@nrc.gov>

Tracking Status: None "Tan, Miranda" <M1TF@pge.com>

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 442 10/27/2010 12:06:00 PM Diablo Canyon Documents Needed 10-17-2010.doc 27134 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

Diablo Canyon Documents Needed Fuel Oil Chemistry ASTM - these are the dates referred in your TS Basis D4057-81 D975-81 D4176-82 D1796-83 D1552-79 D2622-82 D2276-78 Questions Closed Cooling Water From review of the JW pump history, I have a couple of questions:

The Tell Tale leakage from the JW or oil seal - what causes leakage of this sort or leakage and what does it mean (i.e., what is wearing out)?

Can I get a vendor drawing or vendor manual drawing of the jacket water cooling pump?

Specifically, I am interested in the location of the tell tale drain?

For pump 1-1 shaft sleeve corrosion noted - what caused the corrosion? Is this expected?

What is the average life of the JW pumps if we remove the pump 2-1 July 1992 mechanical seal problem from the data? I assume this failure resulted from the maintenance error that we discussed?

Can I get a vendor drawing or vendor manual drawing of the jacket water cooling pump?

Specifically, I am interested in the location of the tell tale drain?

Copy of EPRI TR-107390, Technical Basis of Treatment Chemicals Used for Corrosion Control Open Cycle:

I read that the heat exchanger cleanings could be extended to a 2-year frequency. From review of the program and other documents, I have the sense that the heat exchangers are cleaned every 10 months. Could I get a time line by CCW HX of the mechanical tube cleanings completed since 1990?