IR 05000400/1989001
| ML20245C263 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 05/30/1989 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML18005A946 | List: |
| References | |
| 50-400-89-01, 50-400-89-1, NUDOCS 8906260110 | |
| Download: ML20245C263 (2) | |
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ENCLOSURE 1 CONFIRMATORY MEASUREMENT COMPARISONS OF H-3, FE-55, SR-89, AND SR-90 ANALYSES i
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FOR HARRIS NUCLEAR PLANT ON JANUARY 9, 1989 l-i
.1 Licensee NRC Ratio l
Isotope (uCi/ml)
(uCi/ml)
Resolution (Licensee /NRC)
Comparison J
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H-3 2.20 E-5 2.66 0.08 E-5
0.83 Agreement l
Fe-55 2.63 E-5 2.88 0.09 E-5
0.91 Agreement i
Sr-89 1.12 E-4 1.14 0.03 E-4
0.98 Agreement l
Sr-90 5.85 E-6 6.17 0.25 E-6
0.95 Agreement
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ENCLOSURE 2.
CRITERIA FOR COMPARISON 3 0F ANALYTICAL MEASUREMENTS This enclosure provides the NRC's criteria for the. comparison of results of analytical radioactivity measurements. These criteria are-based on empirical relationships which combines-prior experience -in comparing radioactive +"
analyses, the measurement of the statistically random process of radioact ve emission, and levels of agreement in radioactivity measurements acceptable..
the NRC.
In. these criteria, the " Comparison Ratio Limits"2 denoting agreement or disagreement between licensee and NRC results 'are variable.
This variability is a function of the ratio of the NRC's analytical value relative to. its associated statistical and analytical uncertainty, referred to in this program as " Resolution"2 As the numerical value of " Resolution" increases, the range i.
of acceptable variations or~ differences between the NRC.and licensee analytical
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becomes smaller or more restrictive. Conversely, as.the value of " Resolution" decreases, a wider-and less restrictive variation or. difference between the NRC and licensee analytical values is considered acceptable.
For comparison purposes, a ratio between the licensee's analytical value and the NRC's analytical value is computed for each radionuclides present in a given sample.
The computed' ratios are then evaluated.for agreement or disagreement based on " Resolution."
The corresponding values for " Resolution"- and the
" Comparison Ratio Limits" are listed in the Table below.
Ratio values -which are either above or below the " Comparison Ratio Limits" are considered to be -
.ir. disagreement, while ratio values within or encompassed by the " Comparison Ratio Limits" are considered to be in agreement.
TABLE NRC Confirmatory Measurements Acceptance Criteria Resolution vs. Comparison Ratio Limits
- Compari son. Ratio Limits
. Resolution for Agreement
<4 0.'4 - 2.5 4-7 0.5 - 2.0 8 - 15 0.6 - l'.66 16 - 50 0.75 - 1.33 51 - 200 0.80 - 1.25
>200 0.85 - 1.18 2 Comparison Ratio = Licensee Value NRC Reference Value 2 Resolution = NRC Reference Value Associated Uncertainty
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