ML062290219

E-mail from R. Fleming, NPP, to K. Kennedy, Riv, & M. Honcharil, NRR, Response to NRC Question on High/Low River Temperatures

ML062290219
Person / Time
Site:	Cooper
Issue date:	10/07/2004
From:	Fleming P Nebraska Public Power District (NPPD)
To:	Kennedy K Division of Nuclear Materials Safety IV
References
FOIA/PA-2006-0007
Download: ML062290219 (3)

Text

- . . .r '7 From: "Fleming, Paul V."<mch3

<kmk @nrc.gov>, <pvflemi@nppd.com>

@nrc.gov> -,*,****L, To:

Date: 10/7/04 11:31AM

Subject:

FW: Response to NRC Question on High and Low River Temperatures Kriss/Michelle - the attached file contains the answer to the question of what were the highest and lowest river water temperatures during the 21 day period.

Paul S.----- Original Message -----

> From: Hottovy, Todd E.

> Sent: Wednesday, October 06, 2004 6:12 PM

> To: Fleming, Paul V.

>

Subject:

Response to NRC Question on High and Low River Temperatures

> Paul,

>> <<River temp data for nrc.doc>>

> Todd CC: "Hottovy, Todd E." <tehotto@nppd.com>, "Sumpter, James R. [Jim]"

<jrsumpt@ nppd.com>

i-lw

Question:

What were the highest and lowest river temperatures during the 21 day period?

Answer:

River temperatures are not taken directly at Cooper Nuclear Station, only intake bay temperatures and plant component inlet temperatures are recorded at the site. However, river temperatures are recorded at Nebraska City, NE, by the U.S. Army Corps of Engineers, which is approximately 30 river miles upstream of Cooper Nuclear Station.

Date Omaha Nebraska City River River Temp Temp 1/21/2004 32.11 38.25 1/22/2004 32.50 37.85 1/23/2004 30.79 37.71 1/24/2004 32.58 37.71 1/25/2004 32.34 37.85 1/26/2004 32.94 37.72 1/27/2004 32.90 37.45 1/28/2004 32.70 37.08 1/29/2004 32.23 37.42 1/30/2004 32.58 37.18 1/31/2004 32.63 37.18 2/1/2004 32.49 36.82 2/2/2004 32.41 36.77 2/3/2004 32.29 36.88 2/4/2004 32.68 36.73 2/5/2004 32.85 36.82 2/6/2004 32.61 36.68 2/7/2004 32.99 36.64 2/8/2004 32.99 36.70 2/9/2004 33.17 36.48 2/10/2004 32.83 36.72 2/11/2004 32.88 36.81 Basis:

As noted above, the river temperature is obtained from instrumentation near Nebraska City, NE, which is considered to be representative of the temperature of the river at Cooper Nuclear Station. However, because Cooper Nuclear Station is approximately 30 river miles downstream of Nebraska City, there is a slight heating effect as the water picks up some ground heat as it travels South during the winter months. Taking this added heat into account, it can be assumed that the river temperature at Cooper Nuclear Station ranged between 38 and 39 deg F during the 21 day period.

- S Originator: Title: Date:

Reviewer: Title: Date:

Responsible Manager_ Title: Date:

References:

1) Email from Michael Swenson, U.S.A.C.E, to Dwight Vorpahl, Jr. dated September 28, 2004, "Water Temperature Data".

2) USAR Section 11-4.1, "General".

3) USAR Section 11-4.2.3.1, "Design Low River Level".