ML061010143

E-mail from T. Jones of Entergy to J. Noggle of USNRC, Regarding SFP Sample Data Analysis Summary

ML061010143
Person / Time
Site:	Indian Point
Issue date:	10/25/2005
From:	Jones T Entergy Nuclear Operations
To:	Noggle J Division of Reactor Safety I
References
FOIA/PA-2006-0019
Download: ML061010143 (1)

Text

From: "Jones, T. R." <tjones2@entergy.com>

To: "'James Noggle"' <JDNQnrc.gov>

Date: 10/25/05 1:59PM

Subject:

FW: SFP_Dirt_SampleDataAnalysis..Summary From: Lavera, Ron Sent: Tuesday, October 18, 2005 8:15 AM To: Axelson, William L; Croulet, Donald; English, Christopher; Hinrichs, Gary; Jones, T. R.; Lavera, Ron; Mayer, Don; Nuta, Dragos A; Peters, James; Quinn, Dennis; Skonieczny, John; Smith, David; Leach, Don

Subject:

SFP_DirtLSampleDataAnalysisSummary Analysis of Results of Sample Data from Dirt Samples Taken Near the FSB Wall Crack Leak The dirt samples from near the leak in the IP-2 FSB wall were analyzed by Gamma Spectroscopy and in some cases Tritium. These parameters were selected for several reasons:

1. Tritium is highly mobile in water/soil combinations, there is little or no interaction of the tritium with soil or water, and thus it provides a sensitive indicator of plume extent.

2. Gamma Spectroscopy is a good indicator of gamma fission product and corrosion product presence.

Following the positive identification of fission and corrosion products in dirt sample from the area near the wall at the location of the crack, some samples were sent to an off site vendor for additional analysis for Tritium. Additional analysis are pending for Sr-89/90 and Ni-63.

In general, the activity concentration is highest near the wall and drops off to levels at or below Minimum Detectable Concentration values at 3 to 4 feet from the wall. The contamination in the soil in the location of the active leaks extends all the way down to the mud mat" 1poured over the bed rock.

As the mud mat is not water tight and there was no indication of pooled water althis juncture, it appears that contamination could be below this level and possibly in communication with local ground water flow paths.

Information inthis record was deleted in accordance with Freedom of lof*omai F_ _ _ _