ML20094F856
| ML20094F856 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 08/03/1984 |
| From: | Kathy Weaver COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20094F847 | List: |
| References | |
| NUDOCS 8408130108 | |
| Download: ML20094F856 (4) | |
Text
..
'N Commonwacith Edison l
) ByronNucitarStation O
4450 North German Church Rord s
Byron, Illinois 61010 4
August 3, 1984 J.
G.
Keppler Regional Administrator U., S. Nuclear Regulatory Commission
-799 Roosevelt Road, Building 4 Glen Ellyn, IL 60137
SUBJECT:
(1) Open Item 50-454/83-14-02 50-455/83-12-02 (2) Open Item 50-454/83-46-02:50-455/03-34-02 Attached is information which should document completed action with regard to the above referenced open items.
In the interest of time, the Station is sending this information directly to you with the hope that this will expedite closure on these items.
The first attachment represents a revised page for Telodyne's Analytical Procedures flanual.
The second attachment represents Teledyne sample collection data sheets indicating BY-22 has been installed and is operational.
If you have questions regarding this l et t er,' please contact me at Byron Station.
K.
T.
Weaver Station Health Physicist Byron Nuclear Station i
Attachments cc:
D.
1.
Farrar, CECO Nuclear Licensing M.
J.
Destmann, NRC Region III 8408130:08 840806 46'
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AE WX TELECOPIER 295 3 8-2-84; 3:50 PM:
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ijf v.l(fHueener 3.2 Airborne Iodine Gamma Spectroscopic Analysis by Germanium Detector NOTE:
Because of the short half-life of I-131, count the samples as soon as possible after receipt and no later than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
1.
Load tha charcoal cartridges in a specially designed holder or transfer charcoal from each cartridge to individual plastic bags.
Seal the bags.
2.
Label each bag with corresponding project ID, locations 10 and date of collection.
3.
Place the bags in a standard geometry container, cap the container and secure the cap with a tape.
4.
Place the holder or container on the detector and count for a period of time that will meet the required Lower Limit of Detection (LLD).
Calculation:
A A1=1131 activity (pCi/ sample)=
(atcountingtime)
(1) 2.22 x B Where:
A= net count rate of I-131 in the 0.36 MeV peak (cpm)
B= efficiency for the I-131 in 0.36 MeV peak (cpm /dpm)
(,orrection for Equilibrium (assuming constant concentration over the samp11ng period) and Decay:
AAi e Att (2)
C
=
F (1-e-At )
2 Where: C = equilibrium concentration of I-131 (pCi/m3)
A = activity of I-131 at the time of counting (pCi/ sample) l e= the base of the natural logarithm = 2.71828 A= 0.693/ half life (days)=0.693/8.04 = 0.0862/ day t1= elapsed time between the end of sampling and mid-counting point (in days) t = duration of collection (in days) 2 F= m3/ day
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