ML20235L208

Forwards Results of Analysis of TLDs Exposed to Topaz Gemstones.Results Indicate Generally No Measurable Radiation Exposure from Gemstones within Uncertainty Limits of Measurement Sys

ML20235L208
Person / Time
Issue date:	07/21/1987
From:	Bellamy R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:	Axelson W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20235K755	List: IA-87-500, Forwards Results of Analysis of TLDs Exposed to Topaz Gemstones.Results Indicate Generally No Measurable Radiation Exposure from Gemstones within Uncertainty Limits of Measurement Sys ML20235K751 ML20235K773 ML20235L089 ML20235L120 ML20235L208
References
FOIA-87-500 NUDOCS 8710050389
Download: ML20235L208 (6)

Text

_ _ _ _ _ _ _ _ _ - _

.I

+

4 Osc o

~,o UNITED STATES M(A l' 1 .c . j NUCLEAR REGULATORY COMMISSION E si

. aj REGION I

}v ',"

631 PARK AVENUE ./

%, ,o#

KING OF PRUSSIA, PENNSYLVANIA 19406

{j,w MEMORANDUM FOR:- William Axelson, Chief N7!

Nuclear Materials Safety and Safeguards Branch, Region III FROM: Ronald R. Bellamy, Chief Emergency Preparedness and Radiological Protection Branch, Region I

SUBJECT:

TLD RESULTS FROM THE TOPAZ GEMSTONES We have analyzed the TLDs that you returned to us that were exposed to the ,

Topaz, gemstones. All the results are listed on the attached tables. Each of '

the three groups of gemstone exposures has a control exposure associated with it. The control represents exposure in transit as well as background. The l control exposures have not been subtracted from the gemstone exposures 11sted in the tables. We have also established the total uncertainty cf the results to be about 15%.

l The results indicate that there was generally no measureable radiation exposure frorr the gemstones within the uncertainty limits of this measurement -

system. However, the TLD elements listed below do have a slightly elevated dose that'is probably significant. Because these measurements are at the threshold of the limits of this measurement system, it is not possible tc further quantify the results or their uncertainty.

Group 1 Badge No. 803 E-4 Group 2 Badge No. 800 E-1 Badge No. 805 E-1 Badge No. 806 E-2 i

Group 3 Badge No. 633 E-3 I Badge No. 765 E-3 l We have also enclosed for your information Attachments 1 and 2 giving you an explantion of the configurations of the TLDs used for the topaz gemstones.

I hope this is of use to you. l n l hM) k , n Ronald R. Bellamy, Chief 4 Emergency Preparedness and Radiolog dal Protection Branch FoIA-B M m I 8710050389 870930 PDR FOIA EDWARDS87-500 PDR k({ .

27TSC' 1

___________________________________a

4 CC:

J. Hickey, HQ T. Martin, RJ M. Schumacher, RI W. Pasciak, RI L. Cunningham, NRR J. Jang, RI i

' & ?.

4

{

l

)

4

,h r .

Oaxn . )

i i

TOPAZ TLD EXPOSURES

)

Group 1 . START: 6/11/87 6:00 p.m.

STOP: 6/30/87 7:00 a.m.

I I

E-1 E-2 E-3 E-4 f 1 gemstone exposed on chip No. 800 13.2 mR 12.4 mR 9.7 mR 10.5 m?.

1. 2 gemstone exposed on chip No. 801 11.2- 12.9 l7.9 9.0 3 e 3 9emstone exposed on chip No. 803 10.2. 7.6 9.6 15.3 Control (299) background 10.8 12.9 10.3 f 9.2  !

Total Time: 181 Days Group 2 Sta rt 6/18/87 6:00 p.m.

Stop 7/1/87 7:00 a.m.

E-1 E-2 E-3 E-4

1. 4 gemstone exposed on chip No. 800 14.2 mR 10.9 mR 9. 6 m?. 9. 4 mF.

1. 5 gemstone exposed on chip No. 8C5 l 13,3 13,9 9,; {10.6 i n

1. 69emstoneexposedoncripNo.806[lo,e {15,g l14,. 11 2 . 0 Control (1000800) back g round [97 11.3

{9.9 l13.7 [

Total Time: 12! Days

_ _ _ _ - _ - _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - - ~ - - - -

DRAFT 1

Topaz TLD Exposures 2 Group 3 Start 6/19/87 6:00 p.m.

Stop 7/1/87 7:00 a.m.

E-1 E-2 E-3 'E-4 Sample A gemstones exposed on chip No. 633 9.3mR 10.5 mR 16.9 mR 12.6 mR Sample B gemstones exposed on chip No. 765 j 9.0 9.8 15.8 12.6 Sample C gemstones exposed on chip ho. 807 12.8 9.8 l10.4 l10.4 Sample D gemstones exposed on chip No. 808 13.2 11.8 f13.9 f17.0 Control (774) background 10.2 15.6 12.0 12.8 Total Tire: lli Days a

VII-14 ATTACHMENT 2 Holder Insert j 6

Panasonic s UD-801 AQ M ADE IN JA PAN Z 1 V7C C ^5/ > 2 l cf M[c,y g l FO "fcw j i Element-1 Element-2 Element-3 El er.en t-4 Face %

UD-8 01 AQ M ADE IN JAPAN

-=- - - -

g figure 9. Dosimeter Nomenclature

)

h_ ,

O d w

e M M

\ y, .. .

,\ o .

~- .

N_ ..

w o

%kbc d

. i n

.. w l

a x(

k ,

, c ht dr

,, a g\ jc h c

e m

o

1. pa c

i7

/> _

n O ?". )gos- i

)

2, dE i o

- t Eg 'g c 1  ;- c. ..

s, C e

id e

u r

(t ,A T N, t N ,

E . ,

.. 1m, , s Ml

.me4 n

, Ts o i

C A .

.0 f ,S

.o o

. o ..d

i. o n C

T .

,S,

. s. s ss e T

A if ,

3cu mct aw g

3i x s d

B a

DT 4

D

{~

[ I:::i

=

.. L

% 2 v@@ 0 ,_

e r

u

d. %N i g

F Il!l1