ML071230643

Radiological Survey Results for the Industrial Area & Selected Outside Open Land Area Survey Units at the Yankee Nuclear Power Station, Rowe, Massachusetts

ML071230643
Person / Time
Site:	Yankee Rowe
Issue date:	01/10/2007
From:	Adams W Oak Ridge Institute for Science & Education
To:	John Hickman NRC/FSME/DWMEP
References
RFTA 05-008
Download: ML071230643 (7)

Text

OAK RIDGE INSTITUTE FOR SCIENCE AND EDUCATION Januaiy 10,2007 Mr. John Hickman Division of Waste Maiiageineiit and Environmental Protection U.S. Nuclear Regulatory Coininission Two Wliite Flint North Mail Stop: 7F27 11 545 Rockvdle Pike RockviUe.

MD 20852-2738

SUBJECT:

RADIOLOGICAL SURVEY RESULTS FOR THE INDUSTRIAL AREA AT SELECTED OUTSIDE OPEN LAND AREA SURVEY UNITS AT THE YANKEE NUCLEAR POWER STATION, ROWE, MASSACHUSETTS

[DOCKET NO. 50-29; RFTA NO. 05-0081

Dear Mr. Hlckmaii:

The Oak Ridge Institute for Science and Education (ORISE) performed radiological survey activities the Yankee Nuclear Power Station in Rowe, Massachusetts on October 24,2006.

These survey activj were requested and approved by the U.S. Nuclear Regulatory Commission (NRC). Enclosed are the radiological survey results docuinenting tliese survey activities.

The survey activities included gainma surface scans with the Induswial Area and within selected survey units in the Outside Open Land Areas. Also, a soil sample was collected from an area wid1 elevated gainma radiation detected during gainina surface scans in one of the Outside Open Land Areas. If you have any questions or comments, please hect thein to me at 865.576.0065 or J. Scott IGk at 865.574.0685.

Sincerely, Wade C. Adams Health Physicist/Project Leader Survey Projects WCA:ar Enclosure C: B. Watson, NRC/FSMEMl'/TWFN T-7E18 E. Abelquist, ORISE E. ICnox-Davin, NRC/FSMEMP/TWFN SA23 J. Kottan, NRC/Region I File / 1 67 2 S. IOrk, ORISE L. I<auffinan, NRC/'Region I at ,ties Voice: 865.576.0056 Fax: 865.241.3497 E-mail:

AdamsW@orau.org RADIOLOGICAL SURVEY RESULTS FOR THE INDUSTRIAL AREA AND SELECTED OUTSIDE OPEN LAND AREA SURVEY UNITS AT THE YANKEE NUCLEAR POWER STATION ROWE, MASSACHUSETTS INTRODUCTION The U.S. Nuclear Regulatoiy Coimnission (NRC) requested the Oak Rldge Institute for Science and Education (ORISE) to perform radiological surveys of the Industrial Area and selected Outside Open Land (OOL) Area suivey units (SU) at the Yankee Nuclear Power Station (YNPS) (Figure 1). The OOL SUs included OOL-03-02, OOL-05-05, OOL-05-06, OOL-05-09; OOL-05-10, and OOL-08-07. Figure 2 identifies the SUs that were part of these suivey activities.

These radiological surveys were performed on October 24,2006.

The Yankee Atoinic Electric Company (YAEC) final status suivey (FSS) results were not reviewed prior to these suivey activities; hence, ORISE could not confirm that the ORISE results were commensurate with the licensee's results for these SUs. PROCEDURES The radiological suiveys were performed in accordance with a site-specific survey plan that was submitted to and approved by the NRC (ORISE 2005a). The site-specific suivey plan follows the guidance provided in the ORISE Suivey Procedures and Quality Assurance Manuals (ORISE 2006a and 2005b). Industrial Area Gainma surface scans were performed on approximately 50% of accessible land areas within the Industrial Area using sodium iodide (Nag scindation detectors coupled to ratemeters with audible indicators (Figure 2). Due to the elevated gaimna radiation levels associated with the nearby independent spent fuel storage installation (ISFSI), gaimna surface scans were not performed in the southern portion of the Industrial Area immediately adjacent to the ISFSI. Ths area had previously been backfilled by YAEC personnel to support the return of the area back to a natural landscape.

Outside ODen Land Areas Gaimna surface scans were performed on 100% of accessible portions of OOL-03-02, OOL-05-05, 00L-05-06,00L-05-09, and OOL-05-10 and approximately 40% of accessible portions of OOL-08-07 (Figure 2).

Gaimna scans were performed using NaI scindation detectors coupled to ratemeters with audible indicators.

A soil sample was collected froin a location of elevated gainma radiation detected during surface scans in OOL-05-06 (Figure 2). SAMPLE ANALYSIS AND DATA INTERPRETATION Radiological data and sample media were returned to ORISE's laboratory in Oak kdge, TN for analysis and interpretation. Radioanalyses were performed in accordance with the ORISE Laboratoiy Procedures Manual (ORISE 2006b). The soil sample was analyzed by gaimna spectroscopy for the prhnaiy radionuclides-of-concern POC &e., CO-60 and Cs-137)].

However, Yankee Nuclear Power Station 1672\lieports\2007-01-10 liadiological Survey Results spectra were also reviewed for adltional gainma-emitting fission and activabon products associated with the YNPS and other identifiable total absorption peaks. The soil sainple results were reported in units of picocuries per gram (pCi/g). FINDINGS AND RESULTS Garmna surface scans identified one location of elevated hect gainma ralation on the sod surface in SU OOL-05-06.

Addtional investigation determined that the elevated gaimna radation detected was due to a rock that was located 20 centimeters (an) below the surface. The rock was provided to YAEC personnel prior to ORISE collectmg a soil sample from ths location.

The radonuclide concentrauons in the soil sample collected by ORISE (minus the rock) for CO-60 and Cs-137 were both measured at 0.00 pCi/g whch is below the release criteria of 1.4 and 3.0 pCi/g, respec~vely.

SUMMARY

OKISE conducted ralological suiveys of the Industrial Area and selected OOL SUs at YNPS on October 24,2006.

A confirinatory suivey was not performed because the licensee dd not have FSS data avdable for review. Gaimna surface scans identified one location of elevated hect gainina ralation wih SU OOL-05-06, ORISE collected a sod sample and unearthed a sinall rock that contained the elevated gaimna radation.

The rock wih this soil sainple was provided to YAEC personnel. Gainma spectroscopy results for the one soil sainple (minus the rock) was below the approved derived concentration guidehe levels (DCGLs) (Table 1). Yaiikee Nuclear Power Station 2 1672\Reports\2007-01-10 Radiological Survey Results 17262001 (x) SSACHUSE'ITS Yankee Nuclear Power Station N NOT TO SCALE FIGURE 1: Location of the Yankee Nuclear Power Station - Rowe, Massachusetts 1672\Reports\2007-01-10 Rad~olo~cal Survey Results 3 Yailliee Nuclear Powcr Stahoii 1726-002 (1) MEASUREMENT/S AMPLING LOCATIONS

1. SURFACESOIL OOL-08-01 INDUSTRIAL AREA OUTSIDE OPEN LAND AREA 00L-05-05,00L-05-06,00L-05-09 00L-05-10,00L-03-02,00L-08-07 0' 50' 100' 150' 200' 300' 4W' IIIII I I I I I FIGURE 2: Location of the Yankee Nuclear Power Station - Rowe, Massachusetts Yankee Nuclear Power Station 4 1G72\Reports\2007-01-10 Radiological Sumey Results TABLE 1 Radionuclide H-3

SUMMARY

OF SOIL DCGLs FROM TABLE IN FINAL STATUS SURVEY PLANNING WORKSHEET YANKEE NUCLEAR POWER STATION ROWE, MASSACHUSSETTS Soil DCGLs (pCi/g)" 1.3 E+02 C-14 Fe-55 CO-60 1.9 E+OO 1.0 E+04 1.4 E+OO Ni-63 SI-90 Nb-94 Tc-99 2.8 E+02 6.0 E-01 2.5 EiOO 5.0 E+OO ll Cs-137 I 3.0 E+OO 11 Ag-108in Sb-125 Cs-134 2.5 E+OO 1.1 E+01 1.7 E+OO ll Pu-238 I 1.2 E+01 11 Eu-152 Eu-154 Eu-155 3.6 E+OO 3.3 E+OO 1.4 E+02 II Am-241 I 1.0 E+01 II Pu-239 Pu-241 Cm-243/244 1.1 E+01 1.1 E+Ol 3.4 E+02 *Soil DCGL's based on aniiual doses 8.73 mrem/yr (the 10 inrem/yr DCGL adjusted for the dose contributions from sub-surface coiicrete structures and tritium in ground water (YAEC 2004). Yankee Nuclear Powcr Stabon 5 1672\Reports\2007-01-10 Radiologcal Survey Rcsults REFERENCES Oak Rldge Institute for Science and Education (ORISE). Proposed-In-Process Suivey Plan for the Remaining Spent Fuel Pool and Northeastern Upper RCA Yard Excavations, Yankee Nuclear Power Station, Rowe, Massachusetts (Docket No. 50-29; RFTA No. 05-0081. Oak Rldge, Tennesse.e; December 1, 2005a. Oak Rldge Institute for Science and Education.

Quality Assurance Manual for the Environmental Suivey and Site Assessment Program.

Oak &dge, Tennessee; July 28, 2005b.

Oak fidge Institute for Science and Education.

Suivey Procedures Manual for the Independent Environmental Assessment and Verificauon Program. Oak &dge, Tennessee; August 7,2006a Oak hdge Institute for Science and Education. Laboratory Procedures Manual for the Environmental Suivey and Site Assessment Program. Oak fidge, Tennessee; April 18,2006b. Yankee Atoinic Electric Company (YAEC). Yankee Atoinic Electric Coinpany (YAEC) License Termination Plan (LTP) for the Yankee Nuclear Power Station (YNPS). Revision 1. Rowe, Massachusetts; November 2004. Yankee Nuclear Power Station 6 lG72\Reports\2007-01-10 1iad;ological Survey Results