ML103000194
| ML103000194 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 10/27/2010 |
| From: | Office of Nuclear Reactor Regulation |
| To: | Division of License Renewal |
| References | |
| Download: ML103000194 (3) | |
Text
1 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>>
Hearing Identifier:
DiabloCanyon_LicenseRenewal_NonPublic Email Number:
2031 Mail Envelope Properties (CA7A6E1C5CB1204FA832458074C4571BFDF8C517D7)
Subject:
RE: Regional Inspection Spreadsheet Sent Date:
10/27/2010 12:06:49 PM Received Date:
10/27/2010 12:06:53 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:
R4CLSTR01.nrc.gov Files Size Date & Time MESSAGE 442 10/27/2010 12:06:53 PM Diablo Canyon Documents Needed 10-17-2010.doc 27130 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?