E910-05-017, Calculation E900-05-016, Rev 1, Northeast Dump Open Land Area OL5 - Survey Design, Appendix F to Final Status Survey Report for Saxton Nuclear Experimental Corporation Open Land Area OL5

Calculation E900-05-016, Rev 1, Northeast Dump Open Land Area OL5 - Survey Design, Appendix F to Final Status Survey Report for Saxton Nuclear Experimental Corporation Open Land Area OL5

ML051950559
Person / Time
Site:	Saxton File:GPU Nuclear icon.png
Issue date:	05/31/2005
From:	Cooper W, Paynter A, Tritch T GPU Nuclear Corp
To:	Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML051950551	List: E910-05-017, Calculation E900-05-016, Rev 1, Northeast Dump Open Land Area OL5 - Survey Design, Appendix F to Final Status Survey Report for Saxton Nuclear Experimental Corporation Open Land Area OL5
References
E910-05-017 E900-05-016, Rev 1
Download: ML051950559 (2)

Text

SNEC CALCULATION COVER SHEET CALCULATION DESCRIPTION Calculation Number Revision Number Effective Date Page Number E900-05-016 1 1 I;/3//5 of I Subject Northeast Dump Open Land Area 0L5 - Survey Design Question 1 - Is this calculation defined as 'in QA Scope? Refer to definition 3.5. Yes E No 0 Question 2 - Is this calculation defined as a 'Design Calculation'? Refer to definitions 3.2 and 3.3. Yes 0 No 0 NOTES: If a Yes' answer is obtained for Question 1, the calculation must meet the requirements of the SNEC Facility Decommissioning Quality Assurance Plan. If a 'Yes' answer is obtained for Question 2. the Calculation Originatoes Immediate supervisor should not review the calculation as the Technical Reviewer.

DESCRIPTION OF REVISION Revision 1 adds Attachment 2-3 which provides the calculation logic for the surrogate DCGLw and the action level.

APPROVAL SIGNATURES Calculation Originator W. J. Cooper C ' Date *744 Technical Reviewer T. Tritchl (2 A B Date Additional Review A. Paynter/ \g. l J\- Date 3 \ Ia Additional Review Date 41/2~'~$Y -F 0Li.

DCGLw Calculation Logic

1. Survey Unit: Northeast Dump Open Land Area OL5, Class 1 Area II.

Description:

The purpose of this calculation is to determine a representative mix from available sample analyses results for the Northeast Dump area.

The effective volumetric DCGLw is then determined in accordance with guidance provided by the SNEC License Termination Plan (LTP) and MARSSIM.

Ill. Data Selection Logic Tables: The radionuclide selection logic and subsequent DCGLw calculations are provided in the tables described below.

These tables were developed using Microsoft Excel and are validated in SNEC calculation E900-03-012. Table explanations follow:

Attachment 2-2: Data Listing - This table provides a list of the most representative sample analyses from the OL5 area. Results are from scoping and characterization surveys. The samples consist of soil media that was taken in support of the aforementioned surveys. As applicable, a sample number, sample location, description, radionuclide concentration, and analysis date are provided for each sample. Note that samples are identified as MA5. This survey area designation pre-dates the reassignment to the designator OL5. Of the data listed, only sample number SXSL4766 is used because none of the other results had any positive activity for the hard-to-detect nuclides of interest.

Note I With respect to the survey unit, the term soil" is a generic term that can be used to describe individually or in combination traditional soils, fly ash, building rubble, and/or rock materials.

Attachment 2-1: Effective DCGLw Calculator for Cs-1 37 (in pCi/g) -This table provides the surrogate Cs-1 37 DCGLw calculation results for data derived from Attachment 2-2. It uses the ratios between the nuclides weighted for the DCGLs to determine an effective surrogate Cs137 DCGL.

IV. Summary - Since the survey area is soil, coal debris, and rock materials, the existing release limit is based on the volumetric DCGLw. Using the above logic tables the calculated Cs-1 37 volumetric DCGLw is 6.28 pCi/g. This value would be reduced by 25% as part of the SNEC facilities requirement to apply an administrative limit of 4.71 pCi/g as discussed in the License Termination Plan (LTP).

Attachment 2-3 E900-05-01 6