ML20079E699

Rev to Fort Calhoun Station 1990 Radiological Environ Operating Rept

ML20079E699
Person / Time
Site:	Fort Calhoun
Issue date:	12/31/1990
From:	OMAHA PUBLIC POWER DISTRICT
To:
Shared Package
ML20079E696	List: ML20079E693 ML20079E699
References
NUDOCS 9110070269
Download: ML20079E699 (2)

Text

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ADDENDUM TO APPENDIX A (continued)

EPA TIML- Control Lab Results Limit Explanation

-Code Analysis (pti/L)' (pCi/L)*

STW-589 Sr 90 17.311.2 17.4-22.6 Sample was reanalyzed in triplicate;

,%. results of reanalyses 18.811.5 pCi/L.

No further action is planned.

STH-599 K 1300.0169.2' 1414.7-1685.3* Sample was reanalyzed in triplicate.

Results of reanalyses 1421.7195.3 m The cause of low results is unknown.g/L.

STW 601 Gross 11.012.0 11.0-32.4 Sample was reanalyzed in triplicate.

Alpha Results of reanalyses, 13.411.0 pCi/L.-

STf-447 Sr-90 17.310.6 7.4 12.6 The cause of high result is unknown.-

There was no sample left for reanalysis..

Results of the next cross-check sample was within EPA limits.

1 STAF-457 Sr-90 14.710.6 15.4-20.6 The calculations were verified. The j cause of low results is unknown. There was no sample left for reanalysis. l Result of the analysis of the next sample was within EPA control limit.

STW-461 Ru-106 39.712.5 41.3-58.7 The cause of the low-results is unknown.

Thirty-eight percent of partici)ating laboratories failed the test. Result of the analysis of the next sample was i within EPA control limit.

STM-464 Cs-137 43.711.5 22.3-39.7 The cause of the high results is-unknown. There was no sample left for reanalysis. Results of the analysis of the next EPA sample was within control limit.

STW-467 -I-131 30.310.6 34.4-55.4 After receiving EPA report, the calcula-tion was checked. The wrong collection 1 date had been used. The results of the recalculation was 39.2 pCi/L within EPA control limit.

-STW-477 Ra-228 2.711.0 3.7-6.3 The cause of the low results is unknown.

There was no sample left to be re-analyzed. <

• Reported in pCi/L unless otherwise noted.

i

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• Concentrations are reported in mg/L.

i A-38 Revision 1, 9/9/91 9110070269-910927 PDR ADOCK 05000285 R PDR

ADDENDUM TO APPENDIX A (continued)

EPA TIML Control Lab Results Limit Explanation Code Analysis (pCi/L)* (pti/L)*

STW-478 Gross Beta 38.711.2 42.3-59.7 The activity was recalculated using a self-absorptian correction factor for EPA water. The result of the recalculation was EC 2 pCi/L within EPA control limits STW-482 Ra-228 5.210.2 8.2-14.0 Fifty percent of the participating laboratories failed the test. The analytical 3rocedure was checked.

Result of tic next crosscheck sample analysis was within EPA control limits.

STW-483 Sr-90 21.012.0 22.4-27.6 The cause of low result is unknown.

Result of the next crosscheck sample was within EPA control limits.

STH-504 K 1382.7134.4 1393.4-1656.6 The error was found in conversion from pCi/L to mg/L. Corrected result is 1406 mg/L within control limits.

STW-520 Ra-228 3.410.1 3.9 6.7 The calculation was checked. False positive recovery seems to be the cause of too low results.

• Reported in pCi/L unless otherwise noted.

A-39 Revision 0,9/9/91l 1

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