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Environmental<br />

Restorati on<br />

Contracto ERC Team<br />

Interoffice Memorandum<br />

zO D. A. St. John r.0-19 b"rz0 February<br />

27. 1999<br />

1"Y1• '` See Below<br />

l<br />

ncoa: S. L. Winslow<br />

RadCun EngUla:ring<br />

S1. W:dld<br />

to Co<br />

137 CS<br />

Percent Distribution(r/o)<br />

0.17<br />

82<br />

132EU<br />

ueEu<br />

0.33<br />

0.05<br />

"Sr 17<br />

741 Ain<br />

209/zwpu<br />

0.005<br />

0.1<br />

TOTAL:<br />

X.1 -41 1531-0700<br />

suuecr: CURIE. ESTIMATE FOR SHIPPING CONCRETF. CORE SAMPLES<br />

Job '49. 22192<br />

wwvwll^Mwsrw '10<br />

D,DW NA<br />

il ♦ www<br />

a' Vole<br />

R11<br />

caw vw<br />

CCN: 055082t<br />

The lirllowing calculations show that con; sampicswith a diner reading of equal to or less than<br />

400.000 dpm/IOOcm z will be below the definition of radioactive material as defined in 49 CFR 173.40:<br />

e<br />

of 70 Bq/g (2F3 pCi/g). Lath sample will consist of concret inaterial from four. two inch core<br />

samples and enough water to make a slung consistency. 'Ile distribution of radionuclides is haled on<br />

previous concrete samples taken from the below grade Fuel Storage Basin that would also be<br />

representative of these concrete samples.<br />

(jivgn::<br />

Cylinder Vulurm = nr'h Radius of camrlete corer) = I inch<br />

Concrete Density = 2.35 g/cm' Height of c:cee samplc talcen (h) - U.25 inches<br />

27 pCi = Bq Maximum dimt reading on core = 400,000 dpm/IUOcmz<br />

222 dpm = pCi<br />

Calculations:<br />

V-(3.14)(1 in.)-(025in) = 0.78in'(16.4cm'/irrj(4 core samples)=512 cm'<br />

(400.000 dpm/51.2 cm) (cm' 12.35 g) = 3.32E3 dp Wg<br />

3.321:3 dpm'g (pCi/2.2 dpm) = 1.5E3 pCi/g or 55.4 841g<br />

Conics:<br />

S. 0. Marske X5-53<br />

P. A. Newman X3 -4 1<br />

RadCon Engineering File/LB XO-23<br />

<strong>Document</strong> and Into Services 110-09<br />

Cotltsatration (tom/0<br />

2.55 pCifg<br />

1.2F3 pCi/g<br />

4.95 pCilg<br />

7.513 -1 pCi/g<br />

2.55E2 pCi/g<br />

7.5F.-2 pCi/g<br />

1.5 VQr<br />

1.461'3 PCi/g<br />

X090

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