ML20138A295
| ML20138A295 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 11/29/1985 |
| From: | Walker R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Tucker H DUKE POWER CO. |
| References | |
| NUDOCS 8512110643 | |
| Download: ML20138A295 (3) | |
Text
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NOV 29 %
Duke Power. Company jATTN:.Mr.'H. B.~ Tucker, Vice President Nuclear Production Department
-422 South Church Street Charlotte, NC 28242 Gentlemen:
SUBJECT:
DOCKET NOS. s0-413 AND s0-414 - CONFIRMATORY MEASUREMENT RESULTS CATAWBA NUCLEAR STATION As part of the NRC Confirmatory Measurements Program, spiked liquid samples were sent on July 22,198s, to your facility for selected radiochemical analyses. We are in receipt of your analytical results transmitted to us by your letter dated
- September 30,198s, and the following comparison of your results to the known values are presented in Enclosure 2 for your information.
The acceptance criteria for the comparisons are listed in Enclosure 1.
In our review of these data all comparative results were in agreement. -These data should be reviewed in greater detail by cognizant staff members for any significant trends in the data among successive years in which samples have been analyzed by your facility. Any biases noted may be indicative of a programmatic weakness and your efforts should be expended in determining reasons for such biases.
These results and any results from previous years pertaining to these analyses will be discussed at future NRC inspections.
Sincerely, Original Signed by Roger D. Walker Roger D. Walker, Director Division of Reactor' Projects
Enclosures:
1.
Acceptance Criteria 2.
Confirmatory Measurement Comparisons Sc w/encls:
VR. L. Dick, Vice President-Construction J. W. Hampton, Station Manager bec w/encls:
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l ENCLOSURE 1 CRITERIA FOR COMPARING ANALYTICAL MEASUREMENTS This attachment provides criteria for comparing results of capability tests and verification measurements.
The criteria are based on an empirical relationship which combines prior experience and the accuracy needs of this program.
In these criteria, the judgement limits are variable in relation to the comparison of the NRC's value to its associated uncertainty. As that ratio, referred to in this program as " Resolution," increases, the acceptability of a litensee's measurement should be more selective.
Conversely, poorer agreement must be considered acceptable as the resolution decreases.
RATIO = -LICENSEE VALUE NRC REFERENCE VALUE Resolution Agreement
<4 0.4. - 2.5 4-7 0.5. - 2.0 8 - 15 0.6 - 1.66 16 - 50 0.75 - 1.33 51 - 200 0.80 - 1.25
>200 0.85 - 1.18
7 EleCLOSURE 2 l
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TA8LE 1 CONFIRMATORY MEASUREMENT COMPARISONS OF H-3, FE-55, SR-89, A810 SR-90 AleALYSIS FOR CATAWBA teUCLEAR PLANT OM JULY 1985 Isotope Licensee NRC Resolution Ratic Comparison (UCI/ unit)
(uCi/ unit)
(Licensee /NRC)
H-3 3.80*0.43 E-5 3.4510.07 E-5 49 1.10 Agreement f e-%
1.50'0.7 E-5 1.?110.02 E-5 60 1.24 Ag reement Sr-09 1.90f0.30 E-5 1.45i0.04 E-5 36 1.31 Ag reement Sr-90 1.6010.10 E-5 1.60f0.06 E-5 27 1.00 Ag reement
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