ML092600907

Lr Hearing - Data Explanation

ML092600907
Person / Time
Site:	Indian Point
Issue date:	09/01/2009
From:	- No Known Affiliation
To:	Division of License Renewal
References
Download: ML092600907 (4)

Text

IPRenewal NPEmails From: Gray, Dara F [DGray@entergy.com]

Sent: Tuesday, September 01, 2009 7:00 AM To: Stuyvenberg, Andrew Cc: STROUD, MICHAEL D

Subject:

Data Explainaition Attachments: Response to NRC inquiry on entrainment and impingement flows.doc Hi Drew Attached please find a brief write-up on the differences in entrainment and impingement flows, as we discussed during our teleconference call on August 11, 2009. Please let me know if you have any questions.

Thanks Dara Gray, REM Chemistry/Environmental Indian Point Energy Center (914) 736-8414 DGray@Entergy.com This e-mail and any attachments thereto are intended only for the use by the addressee(s) named herein and contain proprietary and confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify me by telephone and permanently delete the original and any copy of any e-mail and any printout thereof.

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Hearing Identifier: IndianPointUnits2and3NonPublic_EX Email Number: 1672 Mail Envelope Properties (DCB622189B67AD49AE39CD3ED1B4D99D0557987D)

Subject:

Data Explainaition Sent Date: 9/1/2009 7:00:01 AM Received Date: 9/1/2009 7:00:10 AM From: Gray, Dara F Created By: DGray@entergy.com Recipients:

"STROUD, MICHAEL D" <MSTROUD@entergy.com>

Tracking Status: None "Stuyvenberg, Andrew" <Andrew.Stuyvenberg@nrc.gov>

Tracking Status: None Post Office: IPCEXETSP001.etrsouth.corp.entergy.com Files Size Date & Time MESSAGE 878 9/1/2009 7:00:10 AM Response to NRC inquiry on entrainment and impingement flows.doc 77888 Options Priority: Standard Return Notification: Yes Reply Requested: Yes Sensitivity: Normal Expiration Date:

Recipients Received:

9/17/2009 Comparison of Indian Point Cooling Water Flows in Entrainment and Impingement Files Provided to NRC In the impingement file provided to NRC, data were summarized by season. Seasons were defined as the yearly quarter (1, 2, 3, or 4) which include months Jan-Mar, Apr-June, July-Sep, and Oct-Dec respectively.

Data in the entrainment files are summarized by week, and include biological and flow data only for the weeks when sampling occurred. In order to compare flow totals in the two files, the entrainment flows were assigned to seasons as: weeks 1-13 (Season 1), 14-26 (Season 2), 27-39 (Season 3). This assignment does not exactly match the assignments for the impingement data.

Total flow from the entrainment file (converted to m3 from the 1000m3/min in the file) is typically less than flow from the impingement file (Table 1), because not all weeks were sampled for entrainment. The only exception was season 2 in 1986 in which the entire season was sampled for entrainment. Due to the way weeks were assigned to quarters for that year, the entrainment flow total for weeks 14-26 (April 6 - July 5) is slightly larger than the impingement flow which was based strictly on flow during the months of Apr-June.

9/17/2009 Table 1 Comparison of Indian Point Seasonal Cooling Water Flow in Entrainment and Impingement Files Provided to NRC Weeks Sampled for Total Seasonal Flow (m3)

Entrainment and Based on Based on Year Season

(# of unsampled Entrainment File Impingement File weeks) provided to NRC provided to NRC 1981 2 18-26 (4) 414,724,424 464,048,433 1981 3 27-35 (4) 476,309,004 594,880,676 1983 2 18-26 (4) 351,048,313 420,596,991 1983 3 27-33 (6) 232,587,827 427,693,336 1984 2 18-26 (4) 400,733,435 551,297,804 1984 3 27-32 (7) 188,994,568 400,204,962 1985 2 17-26 (3) 399,212,805 511,128,738 1985 3 27-32 (7) 187,169,923 400,359,374 1986 1 2-13 (1) 229,264,261 270,226,674 1986 2 14-26 (0) 399,552,568 378,622,376 1986 3 27-32 (7) 220,170,710 590,025,440 1987 2 20-26 (6) 235,429,460 386,131,723 1987 3 27-32 (7) 189,976,341 543,931,544