DCL-17-058, Diablo Canyon Power Plant, Units 1 & 2, Reporting False Negative Error in Testing of Blind Performance Sample Per 10CFR26.719(c) Notification: Difference between revisions

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#REDIRECT [[DCL-17-058, Reporting False Negative Error in Testing of Blind Performance Sample Per 10CFR26.719(c) Notification]]
| number = ML17158B483
| issue date = 06/07/2017
| title = Diablo Canyon Power Plant, Units 1 & 2, Reporting False Negative Error in Testing of Blind Performance Sample Per 10CFR26.719(c) Notification
| author name = Welsch J M
| author affiliation = Pacific Gas & Electric Co
| addressee name =
| addressee affiliation = NRC/Document Control Desk, NRC/NSIR
| docket = 05000275, 05000323
| license number = DPR-080, DPR-082
| contact person =
| case reference number = DCL-17-058
| document type = License-Fitness for Duty (FFD) Performance Report
| page count = 4
}}
 
=Text=
{{#Wiki_filter:Pacific Gas and Electric Company June 7, 2017 PG&E Letter DCL-17-058 James M. Welsch Vice President, Nuclear Generation Diablo Canyon Power Plant Mail Code 104/6 P. 0. Box 56 Avila Beach, CA 93424 805.545.3242 Internal:
691.3242 Fax: 805.545.4884 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 10 CFR 26.719(c)
Docket No. 50-275, OL-DPR-80 Docket No. 50-323, OL-DPR-82 Diablo Canyon Power Plant Units 1 and 2 10 CFR 26.719(c)
Notification Dear Commissioners and Staff: On April18, 2017, as required by 10 CFR 26.719, Pacific Gas & Electric Company (PG&E) notified the NRC of a false negative error in testing of a blind performance sample. In accordance with 10 CFR 26.719(c), "Drug and alcohol testing errors," PG&E ts submitting the enclosed report of the investigation of the unsatisfactory performance discovered in performance testing associated with the Diablo Canyon Power Plant (DCPP) Fitness for Duty (FFD) Program. On April 18, 2017, ah unsatisfactory performance was reported to the DCPP FFD Program Manager. An error occurred during the testing of a blind performance sample that was processed at Laboratory Corporation of America (LabCorp) testing facility, which is a Health and Human Services (HHS)-certified laboratory.
A urine specimen spiked with Tetrahydrocannabinol (THC) was reported by LabCorp as "negative" when it should have been reported as "positive for THC." LabCorp was notified of the performance specimen result and its potential performance error. The enclosed report from LabCorp, dated May 25, 2017, documents the outcome of LabCorp's investigation and corrective actions. PG&E makes no new or revised regulatory commitments (as defined by NEI 99-04) in this letter. If you have any questions regarding the enclosed information or other FFD program activities, please contact Ms. Charlene Miller, Access Authorization/FFD Manager, at 805-545-2672.
A of the STARS Alliance Callaway
* Diablo Canyon
* Palo Verde
* Wolf Creek Document Control Desk June 7, 2017 Page 2 Sincerely, James M. Welsch Vice President, Nuclear Generation bnsm/4540/50914224 Enclosure PG&E Letter DCL-17 -058 cc/enc: Kriss M. Kennedy, NRC Region IV Administrator Christopher W. Newport, NRC Senior Resident Inspector Balwant K. Singal, NRC Project Manager A member of the STARS Alliance Callaway
* Diablo Canyon
* Palo Verde
* Wolf Creek Enclosure PG&E Letter DCL-17-058 LabCorp Occupational Testing Services Blind Performance Test 0872429795 
 
=.=_" ... -_..,,) Occupa1ional TesUnq Services May 25, 2017 Charlene Miller Access/FFD Manager Pacifit Gas and Electric Company Diablo Canyon Power Plant P.O. Bm< 56 Avila Beach, California 93423 RE: Blind Performance Test 0872429795
 
==Dear Ms. Miller:==
Laboratorv Corporation of 1-\merica Holdings PO Box 12652 1904 Alexander Drive Research Triangle Park, North Carolina 27709 Telephone:
800-833-3984 919-572-6900 Specimen ID Number 0872429795 was received by Laboratory Corporation of America Holdings in Research Triangle Park, North Carolina on April 13, 2017. The specimen was tested and reported as negative on April14, 2017. However, on April 18, 2017 PG&E notified the laboratory that this was expected to be a positive result for THCA. A review of the data at the laboratory showed that the specimen should have been set up for re-extraction.
After discussion with Dr. Paul Georghiou, a corrected report was released April 27, 2017. Specimen 0872429795 was tested via immunoassay on 4/13/17 with a positive response.
The confirmation assay, batch 152678, was not interpreted accurately by the Certifying Scientist and should have been set up for re-extraction.
When injected on the mass spectrometer there was a series of strong peaks to the far right of the chromatogram which interfered with the visual display of the peaks. This unusual presentation was mis-interpreted as a negative result. Upon on 4/19/17 in batch 1090117, specimen 0872429795 was shown to contain 77 ng/ml of THCA. Retraining has been conducted with the Certifying Scientist who did not accurately interpret the chromatographic data. In addition, all NRC batches certified by thls person were reviewed to ensure correct interpretation and compliance with the SOP as a part of our root cause analysis.
No additional irregularities were encountered.
We apologize for any inconvenience this incident may cause you. If we can be of further assistance to you, please do not hesitate to call Michael Bachmann at 919-224-5293 or Phyllis Chandler at 919-572-7512.
:c:!t4-Responsible Person .: /); L ..
--PHyllis K. Chandler Responsible Person}}

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