| The LAMULW02 working data file set, prepared by LANL, consists of nine working files prepared for epidemiologic studies of workers at LANL during 1944 to 1978 and at the Zia Company (Zia), the principal subcontractor to LANL, from 1946 to 1986. |
| The LAMULW02 data file set consists of nine related working files that were received from the Epidemiology Section at the Los Alamos National Laboratory for mortality studies of workers employed at LANL and/or Zia. Data were obtained in various formats and media from different LANL and Zia departments and other agencies. Personnel data (through December 31, 1978) were abstracted from copies of four personnel record sources. Supplemental data were obtained from LANL's security badge book, personnel security questionnaires, and personnel records from other employers under study by LANL. Death information was abstracted from death certificates obtained from various states. Computerized external ionizing radiation data, plutonium bioassay results, and estimated plutonium body burdens were obtained from the LANL Health Physics Department which is responsible for radiation monitoring for all subcontractor personnel at LANL. |
| The data files in the LAMULW02 data file set are segregated by type of data: demographic, external exposure, plutonium bioassay results, and plutonium depositions. Data pertaining to an individual that appear in one or more files may be linked by the individual identification number assigned to each worker. |
| The file LAMULW02_d1 contains demographic information for LANL employees, including birth and death dates, race, sex, educational level, dates of employment, first and last job titles, coded cause of death, and other vital status information. The data in this file pertain to 23,241 workers hired between 1943 and 1977, as well as a few later hires. The file includes 6,803 females, 16,317 males, and 120 workers with unknown sex. Race was determined for 68% of the workers. Vital status was last ascertained in 1992 through the NDI, with information available from 1979 through 1990. Most death information prior to 1984 was obtained through the SSA. There are 4,170 deaths identified in this file. ICDA codes are missing for 15 records. LAMULW02_d1 contains one record per person. |
| The file LAMULW02_d2 contains demographic information for Zia employees, including birth and death dates, race, sex, education, limited work histories, a flag for external monitoring as of 1985, coded cause of death, and other vital status information. Data in this file pertain to 15,311 workers hired during the years 1946 to 1978, as well as a few later hires. The file includes 469 females, 11,215 males, and 3,627 workers with unknown sex. Race was ascertained for 75% of the workers. Only the information for the radiation monitored subset of this cohort has been edited. Vital status was last ascertained in 1992 through the NDI, with information available from 1979 through 1990. Most death information prior to 1984 was obtained through the SSA. There are 5,216 deaths identified in this file. ICDA codes are missing for two records. Most fields have been edited only for the radiation monitored subset of the Zia cohort. This file contains one record per person. |
| The file LAMULW02_d3 contains annual external radiation exposure data from 1944 through 1979 measured using film dosimeters. Data consist of annual whole-body dose, annual penetrating gamma dose, annual non-penetrating gamma dose, beta dose, tritium dose, and fast and thermal neutron doses. Readings in centirem for all monitored Zia employees, LANL employees, other contract employees, and visitors total 175,416. LANL and Zia workers hired prior to 1978 have identification numbers consistent with other CEDR data file sets. This is not the case for most Zia or LANL workers hired after 1978 and all other contract workers and visitors. There are readings on this file through 1985, but only readings prior to 1980 should be used. Revised exposure data beyond 1979 are available in the file LAMULW02_d4. The tritium data have also been revised and are available in the file LAMULW02_d8. The LAMULW02_d2 file contains one record per person per year of monitoring. |
| The file LAMULW02_d4 contains external ionizing radiation data from the period 1980 through 1990 measured using thermoluminescent dosimeters. These data have been revised and replace the data beyond 1979 in LAMULW02_d3. There are 843,496 records in this file. Included are badge readings taken at varying time intervals (annual, semi-annual, quarterly, etc.). Data consist of whole body dose, tritium dose, shallow dose, penetrating dose, and an albedo neutron dose. Data are available for Zia, LANL, all visitors, and other contractors working at LANL during this period. Most Zia or LANL workers hired after 1977, visitors, and other contractors do not have any identification numbers in this file. The tritium data in this file are revised and accurate, and they are duplicated for the years 1980 to 1988 in the file LAMULW02_d8. |
| LAMULW02_d5 contains plutonium bioassay data from 1944 through October 1985. The file contains 43,693 records for LANL and Zia workers monitored for internal radiation exposure. Data have been normalized from their original form. |
| The file LAMULW02_d6 contains estimated plutonium whole-body burdens as of January 1, 1987. There are 16,315 records. Results are given separately for the two isotopes of plutonium (238 and 239) in units of nanocuries (nCi) and nCi-years. The computer code PUQFUA was utilized at LANL to estimate plutonium body burdens using bioassay data. Data are available for LANL, Zia, visitors, and other contract workers in this file; however, only LANL and Zia workers have individual identification numbers consistent throughout CEDR data file sets. |
| The file LAMULW02_d7 contains estimated plutonium whole-body burdens as of January 1, 1985. There are 14,935 records. Results are given separately for the two isotopes of plutonium (238 and 239) in units of nCi and nCi-years. The computer code PUQFUA was used to generate these estimates using bioassay data. LANL and Zia workers have individual identification numbers consistent throughout CEDR data file sets. |
| The file LAMULW02_d8 contains 6,662 revised annual tritium readings available from 1950 to 1988. These readings replace any readings available in the file LAMULW02_d3 for the years 1950 to 1988. The tritium readings for the years 1980 to 1988 are duplicated in the file LAMULW02_d4. LANL and Zia workers have individual identification numbers consistent throughout CEDR data file sets. |
| The file LAMULW02_d9 contains dates of exposure to 2, 5, and 10 nCi of plutonium-238 and plutonium-239, with data available through December 31, 1986. Data were abstracted from hard copy records. Data are available for 726 workers from LANL, Zia, and other contractors in this file; however, only LANL and Zia workers have individual identification numbers consistent throughout CEDR data file sets. |
