ML20210P504

Submits Changes to Text & Table of Rept to Reflect Instrument & Emission Results

ML20210P504
Person / Time
Site:	07000133
Issue date:	08/21/1997
From:	Grube R SEVENSON ENVIRONMENTAL SERVICES, INC.
To:	Buckley J NRC
References
NUDOCS 9708270170
Download: ML20210P504 (4)

Text

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SURVEY FINDINGS AND RESULTS l

i Subsequent volumes contains tables of data, affected during the survey. Deta ls sumnarimd in tables t

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and the volumen alen contain results of data interpretations and comparisons with guidelines and

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condhions established as survey objectives.

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4.1 RACMGROUND LE\\T.LS i

Direct readings ibt beta / gamma background for interior and exterior areas vary based on the material bains surveyed. The bets /panum beckyound levels in opm along with their associated codes are listed in Table E 1. These reptesent ten one minute readings for each nutorial taken with a lucDum model 2221 scaler /ratemeter with a 4348,100cm* window, gas proportional detector. It should be noted that backsmund fluotuatal within a given metreial and higher levels can be obtained. Table E.1 j

does not re8ect the maximum readmg for each material. Small rooms or areas where more than one wall was made of matesial widi elevatal beukyuund readings in close proximity created many of the false readings in excess of the guideline value Original survey results in cpm were a4usted using the new background rates to obtain the corrected dpm in the attached survey resuhs by roost i

Background leveln fm direct alpha readings did not vary appreciably for the different meterials and a 0.5 open bedsground was used for obtaining corrected counts per minute, this information is also 3

i contained in Table E-1. Backpuumi levsts iba inwiumentadon used to ouunt womers varied dightly each day and is recorded on the individual survey forms. Background levela for the smear counting instrumentation as well as other background lewis are contaloed in Table 2 b

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i Tabic E-1 I

Direct Survey Background Data Summary far Buildirg Materials i

Code Area Material Beta Beta Beta Beta Beta Alpha

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/Garama

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/Genwm Bkg Bkg Mir.

Max S+ W Uncert.

Deviation C-1 Ceiling Cocerete 351 345 377 9.91 31.16 0.5 C-2 Ceiling Steel 207 175 246 19.18 23.72 0.5 y)

F-1 Ficor Concrete 357 345 377 9.91 31.16 0.5 bl F-2 Floor Hardwood 262 243 277 12.09 26.72 0.5 3

IB O-1 Outside Roof 7 Dirt 863 824 899

< 20.37 48.46 0.5

8p O-2 08 4 Roof 372 322 432 35.67 31.84 0.5 lQ Tar /Chder O-3 O **ide Asphalt 412 395 437 13.44 33.49 03 W-1 Wd Brick 509 427 572 46.23 37.23 0.5 W-2 Well CmderBlock 444 406 489 26.07 34.77 0.5 W-3 Walt Composition 219 195 242 11.61 24.44 0.5 R

W-4 Wall Glamed Block 857 793

%1 53.39 48.28 0.5 N

W-5 Wbdow Ahaminun 250 250 286 13.27 27.11 0.5 i

y W-6 WaE T,oncruc 357 345 377 9.91 31.16 0.5 X-I Brace Steel 207 175 246 19.18 23.27 0.5

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g X-10 PiMar Concrete 357 345 377 9.91 31.16 0.5 5

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x "lable E-1 3-Direct Sarwy Background Data Susnaary for Building Materia!s M

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X-11 Pipe Saeol 207 175.

246 19.18 23.72 0.5 X-12 Stars Steel 207 175 246 19.18 23.72 0.5 X-13 ElectricBox Metal 270 244 236 13.27 27.11 0.5 X-14 Vat.

Metal 270 244 286 13 27 27.11 03 X-15 Drain Ceramic 743 603 774 26.87 44.97 0.5 g

X-2:

Bracket S. eel 207 175 246 19.18 23.72 0.5 b{

Wood 265 245 286 12.90 26.86 0.5 X-3

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a 13 X-4, Door Wood 265 245 286 12.90 26 86 0.5 ge X-5 Duct.

Metal 273 244 286 13.27 27.11 0.5 X-6 Hood Metal 270 244 286 13.27 27.11 0.5 X-7 1-Benen Saeel 207 175 246 19.18 23.72 0.5 X-8 Landing Saeel 207 175 246 19,18 23.72 0.5 -

X-9 IJeht Metal 270 244 286 13.27 27.11 0.5

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