Indirect Radiobioassay

DOE-STD-1112-98

5.2.2.5 The service laboratory shall submit the report to the testing laboratory. The reporting

of measurement results shall include an estimation of the total combined (overall) error for the

results. The methodology for estimation of errors and a discussion of the reporting of errors

are found in Section 3.0 and Appendix D of ANSI N13.30-1996.

5.2.2.6 The performance criteria used for DOELAP for Radiobioassay direct measurements

results are the relative bias and relative precision statistics. A discussion of the use and

acceptable limits for these criteria is found in section 5.2.3.

5.2.2.7 The service laboratories are asked to complete their counting of the phantoms in two

weeks, then to ship the phantoms to the next location designated by the PEPA. Because there

is only a single test phantom for each testing category (except thyroid), it is important that a

service laboratory keep the phantom for no more than a maximum of 3 weeks. A letter will

inform the service laboratory of the closing date for the performance testing period.

5.2.2.8 Indirect Radiobioassay. A DOE Contractor facility may choose to be accredited in

one or more of the categories or radionuclides shown in Table II. Accreditation in a category

is required if routine measurements are to be performed for DOE Contractors in the

measurement category. This table contains the categories, radionuclides and MTLs for

indirect radiobioassay measurements.

5.2.2.9 The performance testing laboratory will prepare and spike six samples in the urine

and/or fecal matrix in the range of 1 to 20 times the MTL. These samples, along with five

blank samples (identified as such), will be shipped to the service laboratory for analysis.

5.2.2.10 The service laboratory shall analyze at least five out of the six samples that have

been spiked for the particular analyte in which the DOE laboratory is seeking accreditation.

All six may be analyzed and reported, but the DOE laboratory shall report at least five. The

sixth spiked sample is included to allow for lost samples or situations during analyses which

would prevent the service laboratory from obtaining valid results. A Radioactive Materials

label and/or any hazardous chemical labels, if needed to comply with DOE and U.S.

Department of Transportation (DOT) regulations, will be attached or contained with the test

samples. They will also contain an expiration date along with a reference date. The service