ML061530379

In-Process Inspection Cursory Survey Results for the Primary Auxiliary Building Remaining Walls at the Yankee Nuclear Power Station, Rowe, Massachusetts (Docket No. 50-29; Rfta No.05-008)

ML061530379
Person / Time
Site:	Yankee Rowe
Issue date:	10/12/2005
From:	Adams W Oak Ridge Institute for Science & Education
To:	John Hickman NRC/NMSS/DWMEP
References
RFTA 05-008
Download: ML061530379 (6)

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O R k E O A K R I D G E INSTITUTE F O R S C I E N C E AND E D U C A T I O N October 12,2005 Mr. John Hickman Division of Waste Management and Environmental Protection U.S. Nuclear Regulatory Commission Two White Flint North Mail Stop: 7F27 11545 Rockville Pike Rockville, MD 20852-2738

SUBJECT:

IN-PROCESS INSPECTION CURSORY SURVEY RESULTS FOR THE PRIMARY AUXILIARY BUILDING WMAIMNG WALLS AT THE YANKEE NUCLEAR POWER STATION, ROWE, MASSACHUSETTS

[DOCKET NO. 50-29; RF'TA NO. 05-0081

Dear Mr. Hickman:

The Environmental Survey and Site Assessment Program ( E S S A P ) of the Oak Ridge Institute for Science and Education (ORISE) performed in-process inspection cursory survey activities on the remaining Primary Auxiliary Building (PAB) walls at the Yankee Nuclear Power Station in Rowe, Massachusetts on September 14,2005. These survey activities were requested by the U.S.

Nuclear Regulatory Commission (NRC) site representative while ESSAP was performing in-process confirmatory survey activities of the Reactor Support Structure (RSS) Concrete Base.

The survey activities included beta surface scans and direct measurements for total net beta activity. Enclosed are the in-process cursory survey results documenting these survey activities.

If you have any questions or comments, please direct them to me at (865) 576-0065 or Scott Kirk at (865) 574-0685.

Sincerely, Wade C. Adams Health PhysicisUProject Leader Environmental Survey and Site Assessment Program WCA:ar Enclosure cc: T. McLaughlin, NRC/NMSSEWFN T-7E18 E. Abelquist, ORISEESSAP E. &ox-Davin, NRC/NMSS/TWFN 8A23 A. Boerner, ORISE/ESSAP J. Kottan, NRCBegion I S. Kirk, ORISE/ESSAP File/1672 P. 0 BOX 117, OAK RIDGE, TENNESSEE 37831-01 17 Operated by Oak Ridge Associated Universities for the U.S. Department of Energy

IN-PROCESS INSPECTION CURSORY SURVEY RESULTS FOR THE PRIMARY AUXILIARY BUILDING REMAINING WALLS AT THE YANKEE NUCLEAR POWER STATION ROWE, MASSACHUSETTS INTRODUCTION The U.S. Nuclear Regulatory Commission (NRC) site representative requested that the Oak Ridge Institute for Science and Educations (ORISE) Environmental Survey and Site Assessment Program (ESSAP) perform an in-process inspection cursory survey of the Primary Auxiliary Building (PAB) remaining concrete walls at the Yankee Nuclear Power Station ( Y N P S ) . The in-process inspection cursory surveys were performed on September 14,2005. Figures 1 through 4 indicate the portions of the remaining walls that were part of these survey activities.

PROCEDURES An in-process inspection cursory survey plan was not prepared for these survey activities since this was an on-site request by the NRC site representative. The ORISE/ESSAP Survey Procedures and Quality Assurance Manuals were followed for these activities (ORISE 2004 and 2005). Since this was an in-process cursory survey, the licensee did not have final status survey (FSS) data available for review but was able to provide preliminary direct measurement results to ESSAP.

Beta surface scans were performed using gas proportional detectors coupled to ratemeter-scalers with audible indicators. Surface scans were performed on up to 25% of the remaining wall structural surfaces. Particular attention was given to cracks and joints in the evaluated structural surfaces where material may have accumulated. Direct measurements for total net beta activity were performed at ten locations on the evaluated surfaces. Locations where direct measurements were taken are indicated on Figures 1 through 4.

DATAINTERPRETATION Radiological data were returned to ESSAPs laboratory in Oak Ridge, TN for interpretation.

Direct measurement data were converted to units of disintegrations per minute per 100 square centimeters (dpd100 cm).

FhTDINGS AND RESULTS Beta surface scans did not identify any areas of elevated activity on the remaining PAB wall concrete wall surfaces. Total net beta activity measurement results for the concrete structures ranged from 110 to 880 dpd100 cm. All results were well within the respective derived concentration guideline levels (DCGLs) for Co-60 and Cs-137 as specified in the License Termination Plan [LTP (YAEC2004)l. A complete listing of the surface activity level results is presented in Table 1.

Yankee Nuclear Power Station 1672iReportsY2005-10-12In-Process PAB Cursory Survey Results

Figure 1: Remaining PAB Wall - Direct Measurement Locations 1 through 5 Figure 2: PAB Wall - Direct Measurement Location 6 Yankee Nuclear Power Station 2 1672\Reports\2005-10-12 In-Process PAB Cursory Survey Results

Figure 3: PAB Wall - Direct Measurement Location 7 Figure 4:PAB Wall - Direct Measurement Locations 8 through 10 Yankee Nuclear Power Station 3 1672\Reports\2005-10-12 In-Process PAB Cursory Survey Results

TABLE 1 SURFACE ACTMTY LEVELS PRIMARY AUXILIARY BUILDING REMAINING CONCRETE WALLS YANKEE NUCLEAR POWER STATION ROWE, MASSACHUSETTS 1 760 f 380b I 880 2 390 I 3 300 2 360 I 4 460 +- 370 5 640 2 380 6 150 f 350 7 710 2 380 8 560 2 370 9 710 f 380 10 I 110 2 350 "Refer to Figures 1 through 4.

bncertainties represent the 95% confidence level, based on counting statistics only.

Yankee Nuclear Power Station 4 1672WeportsY2005-10-12 In-ProcessPAB Cursory Survey Results

REFERENCES Oak Ridge Institute for Science and Education (ORISE). Survey Procedures Manual for the Environmental Survey and Site Assessment Program. Oak Ridge, Tennessee; September 2, 2004.

Oak Ridge Institute for Science and Education. Quality Assurance Manual for the Environmental Survey and Site Assessment Program. Oak Ridge, Tennessee; July 28,2005.

Yankee Atomic Electric Company (YAEC). Yankee Atomic Electric Company (YAEC) License Termination Plan (LTP) for the Yankee Nuclear Power Station (YNPS). Revision 1. Rowe, Massachusetts: November 2004.

Yankee Nuclear Power Station 5 1672\ReportS\2005-10-12In-F'rwess PAB Cursory Survey Results