ML093420576

Email from M. Ferdas to J. White Et Al, Subj: Oc Status, 5/21

ML093420576
Person / Time
Site:	Oyster Creek
Issue date:	05/21/2009
From:	Marc Ferdas Division of Nuclear Materials Safety I
To:	Collins S, Nimitz R, Jason White Division of Nuclear Materials Safety I
References
FOIA/PA-2009-0214
Download: ML093420576 (3)

Text

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Thomas Hipschman From: Marc Ferdas Sent: Thursday, May 21, 2009 4:40 PM To: John White; Ronald Nimitz; Sam Collins; Marc Dapas; Peter Wilson; Darrell Roberts Cc: Nancy McNamara; Diane Screnci; Neil Sheehan; Jeffrey Kulp; Ronald Bellamy; Scott Barber; David Lew; James Clifford; Stephen Campbell; Eugene Dacus; David Decker;, Undine Shoop; Jenny Weil; Kimberly Hawkins; Thomas Hipschman

Subject:

Oyster Creek Status,5/21 (3:30 pm)

Attachments: Map 5 20 2009.ppt This note provides updated information as of 5/21. Participanrjtscluded Exelon representatives responsible for the coordination of the licensee investigation efforts, and representatives of the New Jersey Department of Enviornmental Protection, Bureau of Nuclear Engineering. NRC Representatives were Marc Ferdas.

1. Well samplinplanalysis The licensee continues to sample its wells in accordance with its Adverse'Condition Monitoring and Contingency Plan. Daily samples of the intake, discharge, and Route 9 bridge canal areas have not indicated any tritium concentration above minimum detectable activity.

The affected Monitoring Wells were last sampled on 5120. The analytical results are provided in the attached document along with previously reported data. While the general indication is that concentrations are declining, more data is required to be conclusive. Accordingly, the licensee will continue to monitor these locations to establish if natural attenuation is occuring, changes in conditions, and validation that the source of the contamination has been terminated.

Samples are taken of the affected monitoring wells, i.e., the Series 50 wells (MW-50, 51, 52... etc.) on a weekly basis.

The licensee will be installing an additional well on 5126 which allow them to perform a "pump test". This will allow for a better understanding of the plumes movement.*

The licensee's geo-hydrology contractor has provided its hydrogeological assessment to Exelon. The NRC is.

reviewing the information.

The licensee has performed bounding dose calculations and identified dose to be a small fraction (<1%) of 1 CFR 50 Appendix I ALARA criteria.

2. Pipe inspection status i i .

The 1" CRD min flow line (CS-38) remains to be excavated and examined. Excavation is expected to commence upon restoration of the south trench area on 6/8. Exelon is expecting to have the CS-38 line  ?-

excavated and examined by 6/15.

3. CST  ::-. 4*

(b)(5)

S

4. Root cause analiysIs/Die falureanalysis Exelon's root cause team has initiated its review and investigation of the circumstances surrounding the conditions that led to the ground water contamination, including, but not limited to: review of the licensee's activities associated with buried pipe, extent of condition, and radiological and environmental assessment of

IIoil the conditions. The root cause assessment is expected to be complete about mid-June (6/19) and is expected to include analysis of the corrosion mechanism and cause that led to the failure of the 8" and 10" carbon steel buried pipes associated with the CST system.

(b)(5)

5. Communications The licensee is continuing to maintain dialogue with various stakeholders, and will be providing an on-site tour to various local government officials on Friday (5/22). The tour will involve a discussion of the tritium issue (event history, actions taken, health aspects) and a tour of the excavation area. The tour group consists of 11 people (2 Lacey Municipal Utilities Authority executives, 3 Ocean County Healt Dept executives, Mayor Lacey Township,Lacey Township Administrator, Lacey Toenship Committeeman, Lacey Township Board Member, and NJ State Assemblyman (9th District) and staffer). The senior resident inspector is scheduled to participate

.in the tour.

Region I has been addressing questions and interest expressed by some local media in the area.

6. NRC actions NRC Region I staff specialists and residents continue to follow this issue closely. Region I's Annual Assessment Meeting for Oyster Creek is scheduled for 5/28; and the staff is prepared for questions in this area. NRC inspection is still on-going and will complete upon review and evaluation of Exelon's Root Cause Assessment, which is expected to be available mid-June, 2009.

In view of the completion of CST examination activities, NRC and Exelon have agreed to reduce the frequency of periodic updates to weekly. The next update is expected to be Friday May 29.

7. New Jersey-Department of Environmental Protection.

Representatives from NJ-DEP participated in the call, and indicated no concern about the licensee's efforts; and had no questions for NRC.

NJDEP has posted its split sampling results from Oyster Creek on its website at http://www.state. ni.us/dep/roolbne/FinalOCH3.htm End of 5/21 update 2

(b)(4)