ML20205T736
| ML20205T736 | |
| Person / Time | |
|---|---|
| Site: | Palisades, Big Rock Point, 05000000 |
| Issue date: | 11/04/1988 |
| From: | Bordine T CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| Shared Package | |
| ML20205T740 | List: |
| References | |
| NUDOCS 8811140369 | |
| Download: ML20205T736 (1) | |
Text
t Consumers power manme Agar-ars MESS o.a.r. om.
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Document Control Desk Washington. DC 20555 DOCKET 50-155 - LICENSE DPR BIG ROCK POINT PLANT -
f DOCKET 50-255 - LICENSE DPR PALISADES PLANT -
DETECTION AND SKIN DOSE EVAtUATION FOR CHARACTERISTIC f
X-RAYS IN ACTIVATION PRODUCT CONTAMINATION i
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'esponse to an NRC telephone inquiry concerning the use of dosimetry which is not accredited by NVLAP for x-rays, the enclosed paper is provided.
Consumera Power Company does not use x-ray machines other than the security i
monitors which have negligible external radiation leakage. We have no significant amounts of charactcristic x-rays from system radioactivity which is predominantly activation product contamination with lov beta energies.
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s The paper which is attached has been scheduled for presentation at the Health
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Physics Society Hidyear Topical Symposium in San Antonio, TX this December.
As the paper indicates, characteristie x-ray exposure of our Teledyne PB3 7
badges with CeSO tDy cause a level of response in the beta vindow which would j
4 result in over-reporting beta dose by a factor of two. These lov energy i
x-rays do not penetrate readily to 1.000 mg/cm2 to provide a deep dose, but the few which may go that deep will also cause over-response relative to Cs-137 (see text on page 4 of the attached paper).
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A follow-up paper is proposed in order to describe the x-ray emission contribution to dose from contamination sources at Big Rock Point and i
Palisades. Preliminary results at Palisades indicate that these character-l 1stic x-rays are not significant (of six samples so far, only one indicated x-rays, and this was at a level of only 3% of calculated skin dose).
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g Thomas C Bordine P', ant Licensing Administrator j
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CC Administrator Region III. NRC 0(
0 Vayne Slavinski, Region III. NRC NRC Resident Inspectors - Big Rock Point & Palisades
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