ML060930101
| ML060930101 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  |
| Issue date: | 10/25/2005 |
| From: | Jones T Entergy Nuclear Operations |
| To: | Noggle J NRC Region 1 |
| References | |
| FOIA/PA-2006-0019 | |
| Download: ML060930101 (2) | |
Text
jJarnei'No6gle-FW': Summary-PAB-51-Floor.doc I
Page i i JameNoggle
- FW: Summary PAB51 Floor.doc Page ij i
From:
To:
Date:
Subject:
"Jones, T. R." <tjones2@entergy.com>
"'James Noggle"' <JDN@nrc.gov>
10/25/05 1:58PM FW: Summary_PAB_51_Floor.doc From: Lavera, Ron Sent: Wednesday, October 19, 2005 6:51 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
Subject:
Summary-PAB._51_Floor.doc Summary of Analysis of Results from Water Sample Take+n the 51' PAB Floor at the FSB West Wall f On Thursday October 13th, during a tour with NRC Regional and site personnel, water was noted on the floor at the 51' Elevation, adjacent to the exterior portion of the FSB west wall contained within the PAB.
The water appeared to be originating from the vicinity of the junction of the floor and wall mats at the FSB West wall. A sample of the water was obtained by wiping the floor with paper towels. The water was analyzed by gamma spectroscopy with the following results:
Description Co-60 uCVmLi Cs-1 34 uCi/mLi Cs-137 uCVmLi IP-2 51' PAB by FSB West Wall - Water collected from floor by wiping floor with paper towels 1.29E-06 ND 1.11E-05 Tritium analysis is still pending.
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JarnesNoggle -FW. SummaryPAB 51-Floor.doc
_Page.2, Since the area is known to have been contaminated by RCS water in the past, and in fact has only recently been decontaminated to allow access without protective clothing, the presence of Co-60 and Cs-137 would be expected.
The results of the scrapping sample taken at the boron deposits observed on the exterior portion of the FSB west wall contained within the PAB were:
Location Type of Sample Co-60 uCVgm Cs-134 uCVgm Cs-137 uCigm Cs-1 37/Cs-1 34 Ratio IP-2 Pipe Penn Mezzanine to Section 1 - Wall Crack Scraping - Dry powder 1.42 gm 1.1 6E-04 1.47E-05 2.95E-04 20 These sample results were consistent with the activity ratios observed In the FSB.
Based on the absence of Cs-134 and the much higher Cs-134 to Co-60 ratio, it is difficult to attribute the source of the water on the floor to the FSB wall leak.