ML19225A065
| ML19225A065 | |
| Person / Time | |
|---|---|
| Site: | 07000371 |
| Issue date: | 05/25/1979 |
| From: | Partlow J NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Kirk W UNITED NUCLEAR CORP. (SUBS. OF UNC, INC.) |
| References | |
| NUDOCS 7907180228 | |
| Download: ML19225A065 (1) | |
Text
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UNITED STATES
[ 7,. f' i NUCLEAR REGULATORY COMMISSION C
WASHINGTON, D. C. 20555
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MAY 2 51979 SGML:GEG 70-371 United Nuclear Corporation
' ATTN:
Mr. William F. Kirk, Manager Nuclear & Industrial Safety Services 67 Sandy Desert Road Uncasville, Connecticut 06382 Gentlemen:
The purpose of this correspondence is to convey our concern over the certification and use of the "KAPL standarc in your measurement c'ntrol program.
As you are aware, you have recently been required to implement a measurement control,mogram responsive to the requirements of 10 CFR 70.57.
Fundamen ta l to an effective control program is the use of representative standards that have assigned values that are unbiased and have small associated uncertainties.
For other than pure uranium compounds, assurance that the assigned value is unbiased can only be achieved by evaluating the effect of other constituents on a given measurement method. Based on the information you have provided,
. it does not appear that this procedure was applied in the ccse of the finished fuel standard, i.e., the KAPL standard. The technique of comparing measurement results on a standard with those obtained on an NBS standard, or alternatively, basing the standard value on an NBS standard, does not guarantee that the assigned value is unbiased.
It is our urderstanding that consideration is being given to establishing d single control standard for use by the fuel vendor and the core contractors.
Prior to performing any analyses to establish an assigned value for this standard, appropriate tests must be performed to demonstrate that the fuel constituents do not introduce undetected biases in the measurement method.
Spiking an NBS Standard Reference Material such as NBS 950 is one possible means of achieving this objective. Should you have any comments or questions regarding our position on this point, plede contact this office.
k d-e aut h Jam 2s G. Particiw, Chief Matarial Control & Accountability L'icensing Branch Division of Safeguards Mm m