IR 05000361/1985023

In-ofc Insp Repts 50-361/85-23 & 50-362/85-22 on 850702 & 12.No Noncompliance Noted.Major Areas Inspected:Results of Radiochemical Test Sample Provided by NRC

ML20133G363
Person / Time
Site:	San Onofre
Issue date:	07/19/1985
From:	Hamada G, Yuhas G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
To:
Shared Package
ML20133G340	List: IR 05000361/1985023 ML20133G337
References
50-361-85-23, 50-362-85-22, NUDOCS 8508080648
Download: ML20133G363 (4)

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U. S. NUCLEAR REGULATORY COMMISSION REGION V :

Report Nos. 50-361/85-23,50-362/85-22-

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Docket Nos. 50-361, 50-362 License Nos. NPF-10, NPF-15 .

Licensee: Southern California Edison Company 2255 Walnut Grove Avenue Rosemead, California -91770 Facility Name: San Onofre Units 2 & 3 Inspection at: In-office Inspection conducted: July 2 and July 12, 1985'

Inspectors: [@ dam de Date ' Signed 7/11/tg G. Ha , Radiat g Laboratory Specialist Approved By: MG. Yuh QuL , Chief

- J/lgls Da'te Signed Facilitt Radiological Protection Section Summary:.

In-office Inspection of July 2 and July 12, 1985 (Report No. 50-361/85-23, 50-362/85-22)

This in-office inspection was conducted to review the results obtained for a test sample provided by the NR Results:

No items of noncompliance were identified during this revie .

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8508080648 850719 PDR ADOCK 05000361 0 PM w .- . - _ _ _ _ _ _ . - _ _ _ _ - _ _ _ - _ - _ _ _ - _ - . _ . _ _ _ . _ _ _ _ _ _ _ _ _ _ _ - - - _ _ . _ _ _ _ - _ _ - _ _ _ _ _ - _ _ _ _ _ _ _ - _ _ _ _ - _ _ _ _ _ ..

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DETAILS l

1) Discussion San Onofre recently changed to a new contractor laboratory to perform

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radioactivity measurements' involving radiochemical separations. Most often, these are samples that require radiostrontium and Fe-55 analyse Certain low activity environmental samples are also contracted out for analysi As a part of NRC's confirmatory measurements program, solutions spiked with known quantities of radioactivity are periodically provided to licensees for analysis by the licensee ~or its contractor laborator Such a test solution was recently submitted to San Onofre, and San Onofre in turn sent it to its contractor laboratory for analysis. The results are summarized belo t

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Certificate SCE Value* Ratio Agreement **

Nuclide uCi/ml uCi/ml SCE/CV Range H-3 7.4 E-5 8.20 E-5 0.90 0.80-1.25 SR-89 3.7 E-5 3.45 E-4 0.11 0.60-1.66 SR-90 3.7 E-6 3.80 E-5 0.097 0.60-1.66 Fe-55 4.0 E-5 2.86 E-5 1.40 0.75-1.33 Fe-59 -

8.11 E-6 -

0.75-1.33 Co-60 1.71 E-5 1.53 E-5 1.12 0.80-1.25 Cs-137 2.09 E-5 1.71 E-5 1.22 0.75-1.33

• Activity corrected to January 11, 198 ** -See enclosure for explanatio While the agreement for the gamma emitters Co-60 and Cs-137 is adequate, Fe-59 was not detected. Poor agreement was obtained for Fe-55 and radiostrontium. Because of the factor of ten discrepancy in the SR-89 and SR-90 results, the vendor laboratory was given the opportunity to r re-examine the results without being told about the discrepancy. The vendor laboratory was not able to find anything that would cause them to change any of the reported data. During this period discussions between the NRC inspector and the technical contact for San Onofre had already

. established that additional quality control spiked samples needed to be analyzed by the vendor laboratory. Thus another set of spiked samples prepared by San Onofre vas already being submitted to the vendor laboratory for analysis. The results for this additional series of spikes, which became available on July 12, 1985, are tabulated belo .

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, Vendor- Certificate

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11aboratory Value Nuclide uCi/mli uCi/ml t

'.SR-89 A, 7.6 + 0.2 E-6 7.6 E-6 6.6 I 0.1~E-6

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SR-8 .6.E-6

' SR-89 C 8.3 I 0.3 E-6 7.6 E-6 i SR-89 D

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9.1 I 0.4 E-6 7.6 E-6 SR-90 A 4.0 I"0'.1 E-6- 4.7 E-6-SR-90 B 6.6.T 0.'1.E-6 ,

- 4.7 E-6

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SR-90 C -

. 4.4 I 0.1 E-6 4.7 E-6 SR-90 D 4.3l{;0.'l-E-6, ,

4.7 E-6

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The results indicate a'ccept ble afreeme'nt -in every case. : While this

. resolves the issue of SR-89, SR-90 measurement , capability, questions regarding Fe-55 measurement' capability and measurement sensitivity

~ (Fe-59) still must befaddressed. i.It was agreed that San Onofre would

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, fabricate spikes'to test for.those issues still.in question and document

all quality control. activities and results for NRC revie With this report, open' item no. 85-15-01 is closed. A new open item

._ number (no. 85-23-01) is-being. assigned to reference vendor laboratory

performance as an area requiring review during the next confirmatory

. . measurements inspectio *

2). Exit Interview .

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A. telephone interview was conducted on July 12, 1985 with Mr. S. Chick (Engineer, Units 2/3 Chemistry Laboratory) to~ discuss the results

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obtained by the: vendor laboratory. It was agreed that San Onofre would

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submit, additional quality control test samples to the vendor laboratory D to permit further evaluation of vendor laboratory performanc . e

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Enclosure Criteria for Accepting the Licensee's Measurements Resolution Ratio

<4 .5 ' .0

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7 - -

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15 .66

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16 - 50 0.75 .

1.33 51 - 200 0.80 -

1.25

, 200 0.85 -

1.18 l

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Comparison Divide each NRC result by its associated uncertainty to obtain the resolutio (Note: For purposes of this procedure, the uncertainty is defined as the relative standard deviation, one sigma, of the NRC result as calculated from counting statistics.) Divide each licensee result by the corresponding NRC result to obtain the ratio (licensee result /NRC). The licensee's measurement is in agreement if the value of the ratio falls within the limits shown in the preceding table for the corresponding resolution.

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