ML18095A692
| ML18095A692 | |
| Person / Time | |
|---|---|
| Site: | Salem, Hope Creek  |
| Issue date: | 01/10/1991 |
| From: | Labruna S Public Service Enterprise Group |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NLR-N91002, NUDOCS 9101220351 | |
| Download: ML18095A692 (2) | |
Text
Public Service Electric and Gas Company Stanley LaBruna Public Service Electric and Gas Company P.O. Box 236, Hancocks Bridge, NJ 08038 609-339-4800 Vice President - Nuclear Operations JAN *1 o 199f NLR-N91002 United States Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555 Gentlemen:
REPORT OF LABORATORY BLIND PERFORMANCE TEST VARIANCES SALEM AND HOPE CREEK GENERATING STATIONS DOCKET NOS. 50-272, 50-311 AND 50-354 Public Service Electric and Gas Company (PSE&G) is transmitting this report per the requirements of 10CFR Part 26, Appendix A, Subpart B 2.8 (e) (4).
PSE&G is conservatively reporting this information, since Part 26 does not clearly define what constitutes "unsatisfactory performance test results."
PSE&G has arbitrarily applied the HHS guidelines for evaluation of ongoing performance testing of HHS certified labs.
During the months of September and October 1990, our laboratory sent a total of 22 positive blind samples to PDLA for analysis.
PDLA's results deviated from the certified target value by plus or minus 20% for 6 samples.
PSE&G requested that PDLA examine the associated data and provide a written explanation for the variances.
PDLA responded to our request in letters dated December 7 and 10, 1990.
Our MRO reviewed this information on December 13, 1990.
Three samples were analyzed low for THC.
PDLA indicated that proficiency scores for THC samples from NIDA, New York State College of American Pathologists (CAP), and other accrediting agencies have been satisfactory, but below assigned target values.
PDLA has prepared new THC metabolite calibration standards and validated their concentrations.
One benzoylecgonine sample tested extremely close to the 20%
allowable limit(+ 20.6%).
PDLA reviewed the analytical data from the GC/MS instrument/data system, and determined that the reported concentration was high due to iess than optimal regression analysis of screening values, versus GC/MS confirmation concentrations.
This resulted in a correlation coefficient of 0.99.
~i~1i20~~~ 910110 F~R ADUG~ b5000272 p~
/fr p._JJ: ~r<(l/Dt1s*t5'G,g 1
Document Control Desk NLR-N91002 2
{JAN I o 1ggf Another benzoylecognine sample tested low.
The positive quality control for the day that specimen was analyzed ran low, approximately 83% of the Levey-Jennings control chart.
POLA stated that they would closely monitor GC/MS benzoylecognine results to establish whether this variation is an isolated case, or if corrective action is warranted.
The final sample contained amphetamine and methamphetamine.
The POLA results were -26.6% and -27.8% respectively.
- POLA noted that their own blind proficiency sample, certified by ElSohly Laboratories Inc., within the identical GC/MS assay batch tested within 6% of target concentrations.
A definitive explanation for these variances could not be identified.
PSE&G does not possess the necessary qualifications to conduct an independent investigation of laboratory activities.
We requested an explanation from POLA and their response is summarized in this submittal.
PSE&G will continue to closely monitor blind performance test results and notify the NRC of any variances.
Should you have any further questions on this issue, do not hesitate to contact us.
Sincerely,
~fo~~--
c Mr. J. c. Stone Licensing Project Manager -
Salem Mr. s. Dembek Licensing Project Manager -
Hope Creek Mr. T. Johnson Senior Resident Inspector Mr. T. Martin, Administrator Region I Mr. Kent Tosch, Chief New Jersey Department of Environmental Protection Division of Environmental Quality Bureau of Nuclear Engineering CN 415 Trenton, NJ 08625