ML19290E328
| ML19290E328 | |
| Person / Time | |
|---|---|
| Site: | 07007022 (SNM-2016) |
| Issue date: | 02/11/2019 |
| From: | Korbly S, Casey Smith F. X. Masse Associates, Passport Systems |
| To: | Ty Naquin NRC/NMSS/DFM/FFLB |
| Naquin T | |
| References | |
| Download: ML19290E328 (1) | |
Text
Institution: Passport Systems Date:
2/11/2019 Locations: 70 Treble Cove Rd Billerica MA Summary:
Ludlum 9DP S/N 25006896; Pressurized Ionization Chamber Bkg: 0.02 mR/h Ludlum 14C S/N 206361; 44-88 GM probe S/N 220016; 44-3 NaI Probe S/N 215025 Bkg: 200 cpm Date wipes were taken:
2/7/2019 Count Time:
1 min Background Count Rate (A):
43 cpm Background Count Rate (B):
30 cpm Location Swipe #
Instrument
% Efficiency Net CPM Instrument Efficiency Net CPM Measured activity of Wipe Test (dpm/100cm^2)
Safe (inside) 1 A
1.38%
0 B
>90%
0
<1000 Safe (inside) 2 A
1.38%
0 B
>90%
9
<1000 Safe (inside) 3 A
1.38%
10 B
>90%
3
<1000 Safe (outside) 4 A
1.38%
10 B
>90%
0
<1000 Safe (outside) 5 A
1.38%
3 B
>90%
0
<1000 Safe (outside) 6 A
1.38%
0 B
>90%
13
<1000 Floors 7
A 1.38%
0 B
>90%
5
<1000 Floors 8
A 1.38%
0 B
>90%
2
<1000 Floors 9
A 1.38%
0 B
>90%
5
<1000 Floors 10 A
1.38%
0 B
>90%
0
<1000 Floors 11 A
1.38%
6 B
>90%
0
<1000 Floors 12 A
1.38%
7 B
>90%
0
<1000 Walls 13 A
1.38%
8 B
>90%
3
<1000 Walls 14 A
1.38%
0 B
>90%
0
<1000 Walls 15 A
1.38%
11 B
>90%
2
<1000 Walls 16 A
1.38%
0 B
>90%
2
<1000 Door 17 A
1.38%
0 B
>90%
25
<1000 Testing completed by :
Chad A. Smith MS, CHP
- Wipes were analyzed using a (A) Health Physics Instruments Model 7010 Rainbow MCA (SN 701188) with a Health Physics Instruments Model 5530/7530 NaI Scillation Probe (SN 730288) and (B) PerkinElmer Tri-Carb 2910 TR liquid scintillation counter.
Decommissioning Test Results A decommissioning survey was completed of the enriched uranium storage vault at Passport Systems on 2/7/19. The historical analysis of radioactive material stored inside of the vault area were HEU and LEU plates. The survey consisted of a direct monitoring using a calibrated hand-held survey meter with GM and NaI(Tl) scintillation probe. Further, an ambient exposure rate survey was completed with a hand-held ionization chamber. Wipe samples were taken from all accessible surfaces of the 10' x 6' space. The wipe samples were first counted on a multi channel analyzer (instrument A below), then on a liquid scintillation counter with an open window (instrument B below). There were elevated count or exposure rates visible with the hand-held instruments and no removable contamination present in the wipe test analysis.
F.X. MASSÉ ASSOCIATES, INC.
Health and Medical Physics Consultants MA Registration 65-0016 NH Registration 258 RI Registration RPS0015 24 Hours: 978-283-4888 PO Box 100 Gloucester, MA 01931-0100 TEL 978-283-4888 FAX 978-281-6702 info@fxmasse.com