ML20215E659
| ML20215E659 | |
| Person / Time | |
|---|---|
| Issue date: | 10/06/1986 |
| From: | Block S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Federline M NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO) |
| References | |
| NUDOCS 8610150432 | |
| Download: ML20215E659 (2) | |
Text
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OCT 06'1986 l-n s
4 MEMORANDUM FOR: Margaret'Federline, Tech ~nical Assistant Office of the Executive, Director'for Operations FROM:
S. Block, Health Physicist, Emergency Preparedness and Radiological. Protection Branch
SUBJECT:
REVIEW OF PERFORMANCE CRITERIA FOR RAD 10BI0 ASSAY (PROPOSED ANSI N13.30)
In accordance with your memorandum of August 9, 1986, the subject proposed standard was reviewed and our comments are enclosed in the attachment. It should be noted, however, that because of constraints in time, our comments do not include in depth review of the mathematical models in the proposed standard and its. appendices that describe the rationale and development of
. Minimum and Acceptable Minimum Detectable Amounts.
k Health Physicist, Region V
Enclosure:
As stated.
bec w/ enclosure:
RSB/ Document' Control Desk (RIDS)
C. Cook B. Faulkenberry J.~ Martin Region V i
SBl c norma 10 6 /86 8610130432 861006 REGS SUBJ PDR
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Page 12, Section 3.1.3 - The last two' sentences of this section state that it may not be possible to locate the whole body counter (WBC) where background is not affected by facility operation. The cure seems to allude to using a background radiation monitor and alarm to alert the operators of background changes. This should not be considered an acceptable alternative since a background monitor should be a generic part of a WBC system.
It is suggested that the Standard consider:
(1) recommending modification of the WBC room to accommodate room shielding since, for reactors, the plant should be operating for some 30 years and the investment might be acceptable on a cost / benefit basis; or (2) re-locating the WBC facility so that background changes are rare or low enough to be statistically unimportant.
2.
Page~24 and 34 - Reporting Results - The description of reporting results should include items that identifies:
(1) whether or not the measurement was a follow-up of a previous positive analysis; (2) the need for a follow-up examination; and (3) the time it should be given based on the findings of the present examination.
3.
Page 27, Section 4.2.3.1 - Change the word "aliquanting" to "aliquoting" on the third line of this section.
131 4.
Page 29,-Table 2 - This table shows I analysis by beta counting.. This radionuclide, at the MDA level of 100 pCi/ liter, could just as well be counted, without chemical separation, by gamma-ray spectroscopy.
Perhaps some comment should be made, as a footnote, to this effect.
Also, an MDA of 100 pCi/ liter seems high based on state-of-the-art technology of beta counting where backgrouggle unt ra es are low. For example, the lower limit of detection for I in milk, based on power reactor technical specifications is 1 pCi/ liter.
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