ML20077H090
| ML20077H090 | |
| Person / Time | |
|---|---|
| Site: | 05000394 |
| Issue date: | 07/20/1983 |
| From: | Adamson R, Neelands J, Rosen A CALIFORNIA POLYTECHNIC STATE UNIV., SAN LUIS OBISPO |
| To: | |
| Shared Package | |
| ML20077H082 | List: |
| References | |
| NUDOCS 8308090597 | |
| Download: ML20077H090 (3) | |
Text
c Pre-Dinmentling (Post-Fuel Remwal) Surface Contaudnation Survey of the AGle-201 Reactor and Facility July 20, 1983 by:
R. Adamson, Reactor Administrator J. Neelands, Technician A. Z. Rosen, Acting Radiation Safety Officer l
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l 0300090597 830004 PDR ADOCK 05000394 W
PDR.
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The following surveys were conducted:
- 1. Quema Sirveys Numbered survey points are shown on the attached Figures 1, 2 and 3.
Instrument: Ludlum Model 125 - Micro-R meter, calibrated 12/4/82 A. Area Sirvey Results (See Figure 1 for ntmbered positions)
(Except as noted, all surveys were done at waist-height.
All readings include background - 8 to 10 pR/hr.)
Position Gama Readings (pR/hr)
(1) on surface 7
(2) 9 (3) 9 (4) 8 (5) 8 (6) at center of safe 8
(7) on surface 8
(8) on surface 7
(9) 8 (10) on surface 8
(11) centerline of reactor 7
(12) centerline of reactor 7
B.
Reactor 21rvey Hesults (See Figure 2)
Position Gama Readings (pR/hr)
(13) inside water tank 6
(14') at top surface of reactor 8
(14) inside graphite liner 35 (15') at bottom surface of thermal column 35 (15) 1 m below bottom surface of thermal column 10 (16) control rod access tank (center) 8 C.
Core S1rvey Results (See Figure 3)
Position Gama Readings (pR/hr)
(17) at surface of graphite (bottom) 14 (18) at surface of graphite (side) 23 (19) at tank surface (bottom) 10 (20) at tank surface (top) 10
J
- 2. asuvable Cbntaunination Alpha symbols (A through FF) show where wipes were made on Figures 1, 2 and 3.
Instrument: Eberline " Rascal" PRS-1, S/N 493; Alpha / Beta Probe 210, calibrated 7/26/83.
Background Reading 46 12 CPM. Wipes were made over 100 cm2 area unless otherwise noted.
Overall detection efficiency for:
Alpha (AM-241 standard) 10%
Beta ('10-99 standard) 8%
(combined efficiency used is 10%)
Position Count Rate (CPM)
(CR-BR)
Max DPM A-Sides of graphite liner in 46 0
B in reactor tank (Fig. 2) 45
-1 C
42
-4 D.
48 2
20 E
Graphite inserts (Fig. 2) 46 0
F~
" Green" control
'inside 44
-2 G
rod holder
_outside 53 7
70 H
- graphite spacer 69 23 230 I"
" Orange" control
'inside 45
-1 J
rod holder
.outside 49 3
30 K.
- graphite spacer 59 13 130 L'
"Furple" control
'inside 48 2
20 M
rod holder
.outside 50 4
40 NJ
- graphite spacer 55 9
90 O'
Fine control
'inside 50 4
40 P
rod holder
.outside 46 0
0
- graphite spacer 52 6
60 R-Control rod holes in 57 11 110 S
graphite core (Fig. 3) 45
-1 T
48 2
20 U-50 4
40 V
See Figure 3 62 16 160 W
See Figure 3 49 3
30 X
See Figure 3 45
-1 Y
See Figure 3 48 2
20 Z
See Figure 3 50 4
40 AA See Figure 3 57 11 110 BB Control rod supports (Fig. 2) 49 3
30 CC Internal wall of 43
-2 access port (Figure 2)
DD Inside glory hole liner 44
-1 (Fig. 2) (area 10 cm2)
EE Westinghouse ion chanber 46 0
bottom (area 10 cm2)
FF Bottom surface of thermal 45
-1 colum (Figure 2)
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