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Res Environmental
Hestoratlon
Contractor
^^^ Team
Interoffice Memorandum
M D. A. ^4. John 1.0-19
t 0M.N.
See Below
t'"TE:
IRON:
373 c'.17g
1^cbruary 27. 1999
S. L. Winslow AV
RadCun Engineering
X3-41/531-0706
SUBJECT. CURIF ESTIMATE FOR SHIPPING CONCKETE CORE SAMPLES
Job No. 22172
D. D. »-A
OC 10.c
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suww. cod. IM
C C N: 055OHN
The following Calculations show that core !iampleswith a direct reading of equal to or less than
400.000 dpm/l 00cm'will be below the definition ofradivactive material as defined in 49 CFR 173.40;
of 70 Bq/g (2F.3 pCi/g). Lerch sample will consist of concrete material Bonn four, two inch core
samples and enough water to make a slurry consistency. 'Fhe dist ri bution al radionuclides is based on
previous concrete samples taken from the below grade Fuel Storage Basin that would also be
representative of these concrete samples.
"vet :
Cylinder Volume _ nr'h Radius of concrete core (r) = I inch
Concrete Density = 2.35 g/Cm' Height of core sample taken (h) - 0.25 inches
27 pCi = Bq Maximum tfrrect reading on core = 400.000 dpm/ 100cm1
2.21 2 dpm = pCi
Calculations:
V - (3.14) (1 in.) 4(U.25in) = 0.78 in' (16.4 cot'/irrj (4 care samples) = 51.7-1 cm'
(400.000 dpnl/5 1. 2 cm) (cm'/2.35 g) = 3.32EI dtm/g
3.320 dpm/g (pCi/2.2 dpm) = 1.5E3 pCUg or 55.4 Bq/g
SI . W Ald
Percent Distribution(%) Cortcentration (VCi/g)
"Co 0.17 2.55 pCi/g
137
Cs 82 1.2E3 pCi/g
02Eu 0.33 4.95 pCi/g
`Eu 0.05 7.5E-1 pCi/g
"'Sr 17 2.55E2 pCi/g
Z41
Ain 0.005 7.5F.-2 pCi/g
2J'U2 4U
Pu 0.1 L5 .i/
Co ies:
S. G. Marske X5-53
P. A. Newman X3-41
RadCun Enginee ring File/LB XO-23
Document and Into Services 110- 09
TD'fAL: 1.4683 pCUg
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