ML20151Z309
| ML20151Z309 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 04/28/1988 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML20151X136 | List: |
| References | |
| 50-321-87-25, 50-366-87-25, NUDOCS 8805050245 | |
| Download: ML20151Z309 (2) | |
See also: IR 05000321/1987025
Text
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ENCLOSURE 1
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COMPARISON Of MEASUREMENTS
H-3. pCi/l
Ratio
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} ample ID
Licensee
NRQ
Resolu(i_on
f licensgg/NRQ,}
Qomparison
i
SN 13$0 (T-2, 81R2365)
3840
231
4140
230
18
0.93
Agreement
SN 1351 (T-3, 87R2366)
5280 1 248
5640 t 240
24
0.94
Ag reement
'
Not Compared
SN 1352 ( T-4, 87R2358)
< 300
< 350
-
-
i
51 1353 ( T-8, 87P2259)
1190 1 196
1070 1 210
5
1.11
Ag reement
$1 1354 (T-12, 87R2360)
121000 1 1720
115000 1 600
191
1.05
Ag reement
SN 13$5 (T
- 3, 87R2362)
4670 1 241
2620 1 230
11
1.78
Di sag reement
SN 1356 (1-16, 8782361)
1080 f 194
1060 t 210
5
1.02
Ag reemen t
SN 1357 (NTA, 81R2363)
4220 2 235
3480
230
15
1.21
Agreement
S3 1358 (P15A, STR2356)
-99.6 1 177
< 350
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-
Not Compared
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SN 1359 ( P158, 87R2364)
14300 t 335
15I00 2 300
52
0.91
Ag reement
53 1360 ( P11A, 87R2357)
< 300
< 350
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-
Not Compa red
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ENCLOSURE 2
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Criteria for Comparing Analytical Measurements
This enclosure provides criteria for comparing results of capability tests and
verification measurenients. 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 denoting agreement or disagreement
between licensee and NRC results are viable. This variability is a function of
the NRC's value relative to its associated uncertainty, referred to in this
program as "Resolution"* increases, the range of acceptable differences between
the NRC and licensee values should be more restrictive.
Conversely, poorer
agreement between NRC and licensee values must be considered acceptable as the
resolution decreases.
For comparison purposes, a ratio of the licensee value to the NRC value for
2
each individual nuclide is computed.
This ratio is then evaluated for
agreement based on the calculated resolution. The corresponding resolution and
calculated ratios which denote agreement are listed in the Table below. Values
outside of the agreement ratios for a selected nuclide are considered in
disagreement.
2 Resolution = NRC Reference Value for a Particular Nuclide
Associated Uncertainty for the Value
"Comparison Ratio =
Licensee Value
N5C Reference Value
TABLE
Confirmatory Measurements Acceptance Criteria
Resolutions vs. Comparison Ratio
Comparison Ratio
for
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.R5,
>200
0.85 - 1.18
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