ML070860741

Yankee E-Mail, Dated 3/22/07, Responding to NRC Request for Additional Information Regarding Yankee Final Status Survey OOL-01-06

ML070860741
Person / Time
Site:	Yankee Rowe
Issue date:	03/22/2007
From:	Carson A - No Known Affiliation
To:	John Hickman, Youngblood T NRC/FSME
References
Download: ML070860741 (4)

Text

John Hickman -Response to March 19 RAIrge_Fi -a'ge 1_From: "Alice Carson" <acarsonl967@comcast.net>

To: "'Thomas Youngblood"'

<THY@ nrc.gov>, "'John Hickman"'

<JBH @ nrc.gov>Date: 03/22/2007 4:48:35 PM

Subject:

Response to March 19 RAI Tom and John, Attached is Yankee's response to Tom's question from Monday. If you have further questions or wish to discuss, please give me a call.Alice Carson 301-916-3995 CC: "'Joe Bourassa" <Bourassa@CYAPCO.com>, "'Gerard P. Van Noordennen"'

<VanNoordennen

@ CYAPCO.com>, <erickson

@yankeerowe.com>, "'Greg Babineau"'

<Babineau

@yankeerowe.com>

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Subject:

Creation Date From: Created By: Response to March 19 RAI 03/22/2007 4:48:01 PM"Alice Carson" <acarsonl967@comcast.net>

acarson1967

@comcast.net Recipients nrc.gov OWGWPOO4.HQGWDOO1 JBH (John Hickman)nrc.gov TWGWPO04.HQGWDO01 THY (Thomas Youngblood) yankeerowe.com Babineau CC ('Greg Babineau')

erickson CC CYAPCO.com VanNoordennen CC ('Gerard P. Van Noordennen')

Bourassa CC ('Joe Bourassa')

Post Office OWGWPOO4.HQGWDOO1 TWGWPO04.HQGWDO01 Route nrc.gov nrc.gov yankeerowe.com CYAPCO.com Files MESSAGE Response to RAI dated 3-19.pdf Mime.822 Options Expiration Date: Priority: ReplyRequested:

Return Notification:

Concealed

Subject:

Security: Size 178 Date & Time 03/22/2007 4:48:01 PM 9963 15714 None Standard No None No Standard c-\temp\GW}00001 .TMP,, Page~Junk Mail Handling Evaluation Results Message is eligible for Junk Mail handling This message was not classified as Junk Mail Junk Mail settings when this message was delivered Junk Mail handling disabled by User Junk Mail handling disabled by Administrator Junk List is not enabled Junk Mail using personal address books is not enabled Block List is not enabled RAI Regarding OOL-01-06 Email Youngblood to Carson dated March 19, 2007 Comment: I have a question about the sample data in survey unit OOL-01-06 that I did not "see" to ask about before. The survey unit has one sample at 2.68 SOF and the sampling was done on a 25-square meter systematic grid. Could you share the SOF data for each of the radionuclides of concern in this survey unit.I ask because if the activity is predominantly Co-60, which has an area factor = 1.8 for the grid size, then have you exceeded the DCGL-EMC?

I see that you used the WRS test for evaluating the entire data set, but did that address all the questions about sample number OOL-01-06-010-F-SD?Yankee Response: The table below provides the activity and the fraction of the DCGL for each of the four radionuclides used in the elevated measurement calculation:

Nuclide Activity (pCi/g) DCGL(pCi/g)

Fraction of DCGLw Co-60 1.29 1.6 0.80 Cs-137 1.31 3.4 0.38 Sr-90 0.90 0.7 1.28 C-14 0.54 2.2 0.25 Total SOF 1 2.71 The differences in the SOF above and the SOF in the FSS report (2.68) can be attributed to the number of significant figures used in determining the SOF.The equation used for calculating thef(DCGLEMc) is: C, +/- C 2 Cn DCGLý x (AreaFactor

1) DCGL 2 x (AreaFactor

2) DCGL, x (AreaFactor,)

Plugging in the values from the table above for the concentration and the 10 mrem/yr DCGLs and using the radionuclide-specific area factors for 25 n'? from LTP Appendix 6Q: 1.29 1.31 0.90 0.54+ + + =0.57 1.6xl.8 3.4x 3.7 0.7x54 2.2x860 Other radionuclides were identified above the Critical Level but were below the MDA, therefore contributing very little to the overall fraction.

As can be seen by the above values, Sr-90 was the predominant radionuclide.