IR 05000346/1985024

Addendum to Insp Rept 50-346/85-24,consisting of Comparisons of Results of Liquid Samples Collected During Insp & Criteria for Comparing Analytical Measurement to Close Out Open Item 50-346/85-24-1

ML20136J576
Person / Time
Site:	Davis Besse
Issue date:	11/19/1985
From:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
Shared Package
ML20136J537	List: IR 05000346/1985024 ML20136J530
References
50-346-85-24, NUDOCS 8511250387
Download: ML20136J576 (2)

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t :f TABLE 1 U S NUCLEAR REGULATORY dOMF11SSION

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OFFICE OF INS'PECTION AND ENFORCEMENT CONFIRMATORY MEASUREMENTS PROGRAM

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J,, FACILITY: DAVIS BESSE *

FOR THE 3 OUARTER OF 1905

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, ------NRC-- =

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LICENSEE ---LICENSEE:NRC SAMPLE ISOTOPE RESULT ERROR PESULT EPROR RATIO PES T

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L WASTE' G BETA 2.OE-05 7.OE-07 2.5E-05 O.OE-01 1.2E.00 2.9E 01 A H-3 3.3E-04 5.0E-06 3.1E-04 0.0E-01 9. 4 E-01 6.5E 01 a

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SR-89 1.2E-08 7.OE-09 (2.OE-08 0.OE-O1 1.7E 00 1.7E 00 N

SR-90 1.5E-08 4.OE-09 ( 6. ^E- 00 0.OE-01 4.OE-01 3.7E 00 A CO-58 1.7E-05 6.0E-07 1.4E-05 0.0E-01 8.6E-01 2.8E 01 A CO-60 6.4E-06 3. OE- 07 7.7E-06 0.OE-O1 1.7E 00 2.!E O! A

,' 3 CS-134 4.2E-06 2.OE-07 3.3E-0 .OE-01 7.9E-01 2.1E O1 A CS-137 1.1E-05 3. OE- 07 8.5E-06 0.OE-01 S.OE-01 3.6E 01 a

T TEST RESULTS:

AhAGREEMENT D3 DISAGREEMENT coCRITERIA RELAXED

..N3NO COMPARISON sc

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ATTACHMENT 1 ,

CRITERIA FOR COMPARING ANALYTICAL MEASUREMENTS

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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 progra In these criteria, the judgment limits are variable in relation to the com-parison of the NRC's value to its associated one sigma uncertainty. As that ratio, referred to in this program as " Resolution", increases, the acceptability of a licensee's measurement should be more selective. Conversely, poorer

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agreement should be considered acceptable as the resolution decreases. The values in the ratio criteria may be rounded to fewer significant figures to maintain statistical consistency with the number of significant figures reported by the NRC Reference Laboratory, unless such rounding will result in a narrowed category of acceptanc ,

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RESOLUTION RATIO = LICENSEE VALUE/NRC REFERENCE VALUE Agreement

<3 No Comparison

,13 and <4 .5 y_4 and <8 .0

.15 and <16 l'.67 jt16 and <51 0.75 - 1.33 j51and <200 0.80 - 1.25

_1200 0.85 - 1.18

l Some discrepancies may result from the use of different equipment, techniques, and for some specific nuclides. These may be factored into the acceptance criteria and identified on the data sheet.

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