ML20217N398
| ML20217N398 | |
| Person / Time | |
|---|---|
| Site: | (SSD-2) |
| Issue date: | 08/29/1997 |
| From: | Camper L NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Bailey E CALIFORNIA, STATE OF |
| Shared Package | |
| ML20217N395 | List: |
| References | |
| SSD, NUDOCS 9805050307 | |
| Download: ML20217N398 (2) | |
Text
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0N UNITED STATES Y
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j NUCLEAR REGULATORY COMMISSION
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f WASHINGTON, D.C. 20555 4001
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August 29, 1997 1
Mr. Edgar D. Bailey, C.H.P., Chief Radiological Health Branch Food, Drugs & Radiation Safety Division State Department of Health Services 714/744 P Street c.
P.O. Box 942732
~
Sacramento, CA 94234-7320 I
Dear Mr. Bailey:
l The following is provided for information, and use, as the State deems appropriate.
l
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l Recently, the NRC became aware that the user's manual for the CPN model MC-3 Portsprobe gauge directs the user to expose the tip of the source rod, then tip up the moisture dsnsity gauge to visually guide the source rod into the bore hole. The source is exposed when the user performs this step. A copy of a page from the CPN user's manual is enclosed. The illustration at the bottom of that page shows the manufacturer's recommended practice that raised this concern.
l I
l Although calculations performed by NRC staff show that the expected dose to the user for performing this activity is within the exposure limits, for occupational workers, contained in 10 CFR Part 20, we are referring this to you for your consideration.
l
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If you have any questions, please contact Michele Burgess at (301) 415-5868.
Sincerely, l
ftuy.
Larry W. Campe/h_
i r, Chief t
Medical, Academic, and Commercial Use Safety Branch l
Division of Industrial and Medical Nuclear Safety i
Office of Nuclear Material Safety and Safeguards l
Enclosure:
As stated l
l 9805030307 971021 POR RC e
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Soils / Aggregates Transmission Measurements I
For hard 50:1s. a Campoell hammer may be reovired. as shown in Figure 3 2. The weighted hammer is usea to both dove and extract the pin while tne operator stands on the guideplate. Drill the hole a minimum oi 2 in.
(50 mmi deeper inan the intencec dep:n of measurement.
CAMPEELL CAMPEELL QD/
HAMMER HAMMER IN AMPAC7 y
IN EXTENDED a/
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At er eni:ing :5e :ransm:ssion no:e:
4 Tiit :ne 3ORTAPROSES siicn::v usi.;:ne cas:
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- ic on :ne ron: of:he bo::om as::.g.
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- 2. Lower a source roc antd tne -ancie s CASU" oc:weer an: 4 in. ;30 and 700 mm-I;
~ TPANSM:SS:ON HOLE
- . Cras ine gwde :uoe aoose :ne 5ancie an:
\\,i3.}p5 raise :ne MC 3 untii:he source o is visioiv p, ',
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Soln! :nto :he noie.,Look over :ne rent en gT,((gV of the cauce.:
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. Lower :ne MC 3 anc source rod into the hoic.
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- 3. Set the handle to depth position cesired an 9.c y ~ 0 w. D s
start :es:,
I Continued on new pace