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Title: Traceability and Proficiency Tests.


Abstract not provided.

Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the JOWOG 23 Test System Symposium held April 25-28, 2017 in Albuquerque, New Mexico, United States.
Country of Publication:
United States

Citation Formats

O'Brien, Edward, and Benner, Mark S. Traceability and Proficiency Tests.. United States: N. p., 2017. Web.
O'Brien, Edward, & Benner, Mark S. Traceability and Proficiency Tests.. United States.
O'Brien, Edward, and Benner, Mark S. 2017. "Traceability and Proficiency Tests.". United States. doi:.
title = {Traceability and Proficiency Tests.},
author = {O'Brien, Edward and Benner, Mark S.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 5

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  • Calorimetry provides a method to establish the traceability of the nondestructive assay (NDA) of plutonium utilizing the traceability of calorimetric assay and its relative insensitivity to sample matrix. Efforts at Mound Laboratory to establish the traceability of the calorimetric assay of plutonium are described. Results from the Plutonium Metal Exchange Program and a calibration alternatives experiment are the basis for determining the bias between calorimetric assay and chemical assay. The probable cause of the bias is identified. Current uses of calorimetric assay for NDA measurement control and extension of calorimetry to dynamic calibration of NDA are discussed.
  • The ancient religious symbol of the golden calf has become a present day metaphor for a tangible but specious object that diverts the attention from an intangible, authentic, and crucial entity that it purports to represent. Peter Stein, measurement guru, for several years (1962 et seq.) has noted that calibration traceability has taken on the character of a Golden Calf.'' He has cautioned that with the present day emphasis on formal quality assurance in measurement, calibration traceability as a primary attestation of accuracy can be disproportionately emphasized to the detriment of actual measurement accuracy. This seemingly paradoxical claim is well-foundedmore » as illustrated by many examples where the more important issues of measurement qualification, validation, system characterization, and transient correction are recognized as affecting end accuracy much more critically than usual calibration errors. This paper extends Stein's areas of concern and reviews several practical examples where instrument errors of the magnitude typically revealed in standards laboratory calibration are dwarfed by the more generally consequential measurement errors of misapplication and naive reliance on highly accurate laboratory calibration of component instruments. The purpose of the paper is not to denigrate calibration nor its traceability. Rather, it is to caution that experimenters, standards and specifications writers, calibration laboratories, and measurement quality auditors must recognize these two important aspects of quality assurance as merely a partial, and certainly not a predominant, tool for the assurance of accuracy and quality in measurement. 12 refs., 1 figs.« less
  • A Josephson Array Voltage Standard (JAVS) has been established at the National Metrology Laboratory (NML) in South Africa, with the assistance of NIST and the PTB. We are currently working on what we believe to be the first use of the global positioning system (GPS) to provide direct frequency traceability for a JAVS.
  • A difficult and important region in the AC traceability chain lies in the higher voltage ranges from 30 volts to 1000 volts at frequencies between 100 khz and 1 Mhz. This paper describes recent developments to improve the accuracy/speed performance of AC voltage buildup over thes ranges.