ML20034C156
| ML20034C156 | |
| Person / Time | |
|---|---|
| Site: | 07000824 |
| Issue date: | 04/24/1990 |
| From: | Dan Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Trent L BABCOCK & WILCOX CO. |
| References | |
| IEIN-82-18, NUDOCS 9005020119 | |
| Download: ML20034C156 (2) | |
Text
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'O$C/t2l APR 2 41990 Docket No.70-824 License No..SNM-778 Babcock and Wilcox Company.
ATTN:
L. K. Trent Safety Manager Naval Nuclear' Fuel Division P. O. Box 785 Lynchburg, VA 24505-0785 Gentlemen:
SUBJECT:
INFORMATION REGARDING INTERPRETATION OF BI0 ASSAY MEASUREMENTS-This is to provide you information regarding the interpretation" of bioassay measurements to assess -intakes of radioactive material.- Enclosed.is-.an NRC-l 1
memorandum which updates a position taken in Information. Notice' 82-18,
" Interpretation of Bioassay Measurements;. Assessment of ~ Intakes ". 'This NRC memorandum specifies that assessment of individual intakes using bioassay data should be based on the best data and models available for that purpose rather than the models in place at' the time the NRC regulations in.10 CFR Part 20; I
were icplemented.
If you have any questions on the above, please give me a call.-
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-Sincerely.-
DRIGINAL SIGNEO By..
DOUGLAS A COtuNS
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Douglas M.. Collins, Chief-Emergency Preparedness and i
l Radiological Protection. Branch l-Division of. Radiation. Safety j
L and Safeguards l
Enclosure:
l Memorandum dated March 14, 1990 cc w/ enc 1:
C. 'C. Boyd, Jr.
i Babcock & Wilcox NNFD Research Laboratory l
P. O. Box 11165 Lynchburg, VA 24506-1165
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l Commonwealth of Virginia bec w/ encl:
(See page 2) 9005020119 900424 9
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Babcock and Wilcox. Company 2-bec w/ encl:
Document Control Desk U.S. Nuclear Regulatory Commission.
ATTN: NRC Resident Inspector Mail Code 42 P. O. Box 785
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Lynchbur0, VA 24505-0785 bec w/o enc 1:
License Fee Management Branch i
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l o-UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D. C. 20655
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l-March 14, 1990 l
HEh0RANDUM FOR:.Those on the Attached List.
FROM:
LeMoine J. Cunningham, Chief Radiation Protection Branch Division of Radiation Protection and Emergency Preparedness Office of Nuclear Reactor Regulation
SUBJECT:
ORAFT NRC INFORMATION NOTICE, " INTERPRETATION OF B10 ASSAY MEASUREMENTS; ASSESSMENT OF lNTAKE" In a July 13, 1968 memorandum, I informed you that we had decioed not to issue-i the enclosed draft information notice which had been prepared after resolution of HRC headquarters ett regional office comments on earlier drafts.
(Note:
The technical contacts have been updated on the' enclosed copy of-the.draf t.)-
4 A primary reason for this decision was that a regulatory guide endorsing the.use 1
of NUREG/CR-4884, " Interpretation of Bioassay _ Measurements," was to have been L
issued within a few months and we intended to have that guide incorporate the
~
I message in the enclosed draft information notice concerning the incorrect.
" position" in-Information Notice No. 82-18.- That regulatory guide has not been issued and, although the guide is still under development,.we do not expect.it to be 1ssueo in the near future.
.i We have reconsidered issuing the enclosed' draft notice;-however, we again have decided not to do so primarily because the regulatory guide: incorporating the
- t information is still planned and because the importance of the information con-tained in-the enclosed draft is below the current threshold of-importance suf_-
ficient to warrant issuance of an NRC information notice. However, to make this information available to the public, we are placing a copy of this memo-randum enclosure in the public document room. Therefore, you are free to trans-mit copies to licensees if you so desire.
1 eN e J. Cunningha, Chief Rad ation Protection Branch Division of Radiation Protection and Emergency Preparedness Office of Nuclear Reactor Regulation
Enclosure:
Subject Information Notice CONTACT: John D. Buchanan, NRR 492-1097 an,,
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Ench.ure.
n UNITED STATES
- J Is.
NUCLEAR REGULATORY COMMISSION OFFICE OF NUCLEAR REACTOR REGULATION WASHINGTON, D.C.
20555 June xx, 1988 l
I NRC INPORMTION NOTICE NO. 88-XX:
INTERPRETATION OF B10 ASSAY MEASUREMENTS; ASSESSMENT OF INTAKES Addressees:
All nuclear power reactor facilities holding an operating. license or a con-struction permit, research and test reactors, fuel facilities, and Priority material licensees.
Background and
Purpose:
This information notice is intended to correct an NRC position in Infomation Notice 82-28 (Reference 3) that was in conflict with the NR9 staff position published in several regulatory guides. The NRC position in Infomation Notice -
82-18 indicates that, for p'urposes of determining compliance with the 10 CFR Part 20 intake limits, only the methodology of the International Com'ission on Radiological Protection (ICRP) Publication 2 (Reference 2) can be used'in.
assessing intakes of radioactive material using bioassay data.- Another purpose of this 1988 information notice is to call attention to a comprehensive new manual prepared for the NRC that can be.used to compute intakes from both in vivo and in vitro bioassay measuremehts " Interpretation of Bioassay I
Keasurements? TERIG/CR-4884).
It is expected that recipients will review the i
information in this information notice for applicability to their programs.
However, suggestions contained in this information notice do not constitute NRC requirernents; therefore, no specific action or written response is required.
Discussion:
The NRC staf f position with respect to bioassay is presented in NRC Regulatory Guides 8.9, 8.11, 8.20, 8.22, and 8.26.
In general, the position is that.
assessment of individual intake using bioassay data should be based on the best data and models available for that purpose.
IE Information Notice 82-18, " Assessment of Intakes of Radioactive Material by Workers," issued in 1982, pointed out that the present NRC limits on intake are
. based on ICRP Publication 2 and concluded with the NRC position:
"The NRC will continue to use the ICRP Publication 2 methodology in determining coup 11ance with 10 CFR 20 until the revision of 10 CFR 20 has been published as a final rule.'
DRAFT
l IN 88-XX
[M) 5 '
f June xx, 1988 Page 2 of 3 The NRC staff now recognizes that this position in Information Notice 82-18 (2) is incorrect in implying that only ICRP Publication 2 can be used for assessing bioassay data to determine compliance with 10 CFR Part 20 and (2) conflicts with the NRC staff position expressed in relevant regulatory Although ICRP Publication 2 provides the basis for current 30 CFR guides.
Part 20 limits on intake (based on long-term, chronic exposures), it does not always provide an adequate basis for assessing individual intake-because it does not provide information on body content or excreta _ following single I
(acute) intake or information applicable to an individual differing from the
" standard man" defined in ICRP Publication 2.
This inadequacy is recognized in 2CRT Publications 20 and 10A (References 3 and 4), which are endorsed in Regulatory Guide 3.9 and which are mentioned in Information Notice 82-18 as being used by the NRC to evaluate bioassay data to determine compliance with regulatory requirements.
The NRC staff became aware of the problem with the NRC position in Information Notice 82-28asaresultofreviewsanddiscussionsduring[ftsdraftstage) of a draft report, " Interpretation of Bioassay Measurements (Reference 5),
This prepared by Brookhaven National Laboratory (BNL) under an NRC contract.
report (which was published in July 1987) is a comprehensive manual that, for the first time, provides information on how to compute intakes from both in vivo and in vitro bioassay measurements and contains tables for the interpretaUon of This manual bioaEay results, in terms of intake, for several hundred nuclides.
confoms to the positions in existing regulatory guides,, and the computed intake retention 1 actions in the report have been verified by comparison with results generated. other computer endels using the same set of assumptions (REMEDY and DOSEDI /DOSEYR). The use of this report, with its straightforward method-clogy, cc: :d help licensees avoid the difficulties associated with the use of the methc alogy in ICRP Publication 2.
l The NRC plans to issue, for connent, a draft regulatory guide that would endorse the 8NL report for use in assessing intakes of radioactive material from the results of bioassay measurements.
In the interim, use of this report-for the interpretation of bioassay measurements is consistent with the regula-tory positions in existing regulatory guides on bioassay; therefore, the report say be used for this purpose. Of course, the limits on intake given in 30 CFR 20.103 and based on ICRP Publication 2 continue to apply until they are changed in a revision of 10 CFR Part 20.
Furthermore, to the extent it is applicable, ICRP Publication 2 may continue to be used for assessing intakes of radioactive material for comparison with the intake Ifmits of 10 CFR Part 20.
O HAFT
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IN 88 XK-i' June xx, 1988 Page 3 of 3' No specific action or written' res >onse is required by this information notice.
If you have any questions!about tiis matter please contact ~ the regional administratoroftheappropriateregionalofficeorthisoffice.
Charles E. Rossi, Director -
Division of Operational Events Assesssent
- Office of Nuclear Reactor Regulation.
J'enn b. Buchattat?
Technical Contacts:-4iisiiSiiiayash, NRR 8m-dded 6, 8eco AS,B AS-(30/) Y92-37.ThI (301) 492-3422 e
J References (1) IE Information Notice 82-18, " Assessment of Intakes of Radioactive Material by Workers," June II,1982.
(2) " Report of Comittee II on permissible Dose for Internal Radiation,"
Recomendations of the International Connission on Radiological Protection, ICRP Publication 2,1959.
I (3) " Report of Cosmittee IV on Evaluation of Radiation Doses in' Body Tissues i
from Internal Contamination due to Occupational Exposure," Recommendations of the International Cosmission on Radiological Protection, ICRP I
L Publication 10, 1968.
(4) "The Assessment of Internal Contamination Resulting from Recurrent or Prolonged Uptakes; A Report of ICRP Cossnittee 4,* Reconnendations of the.
International Cosnission on Radiological Protection, ICRP Publication 10A, 1969.
(5) Edward T. Lessard, Xia Yihua, Kenneth W. Skrable, et al.,)" Interpretation of Bioassay Measurements," NUREG/CR-4884 (BNL-NUREG-52063, July 1987.
Attactanent: List of Recently Issued NRC Information Notices 9
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