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At least 1,297 records · Page 72Linked to original sources
PubMed1998

Medical use of byproduct material; proposed revision--NRC. Proposal rule.

The Nuclear Regulatory Commission (NRC) is proposing a revision of its regulations governing the medical use of byproduct material. The proposed rule is one component of the Commission's overall program for revising its regulatory framework for medical use. The overall goals of this program are to focus NRC's regulations on those medical procedures that pose the highest risk to workers, patients, and the public, and to structure its regulations to be risk-informed and more performance-based, consistent with the NRC's "Strategic Plan for Fiscal Year 1997-Fiscal Year 2002". A notice in this issue of the Federal Register announcing the Commission's proposed revision of its 1979 "Medical use Policy Statement" for public comment is published elsewhere.

Education↗
PubMed2001

Results of a Division of Radiation Protection scrap yard exercise.

For years the Division of Radiation Protection (DRP) has participated in exercises, which are required by the Federal Emergency Management Agency (FEMA) to demonstrate our ability to deal with an accident at a nuclear power plant. These demonstrations are defined by objectives and are structured such that they offer little opportunity to practice for real-world radiological events in the exercise. Since real-world radiological incidents do occur throughout the year, this exercise was designed to be as realistic as possible. A scrap yard incident was chosen as the most probable type of event. The exercise was conducted on May 5 and 6, 1999.

Decontamination↗
PubMed2004

Health and safety considerations following the death of a patient.

Arthur, who had spent all his life in Liverpool, came to live with his niece in Brighton. He was in his eighties and systematically prepared for his death. He told her that he would like to be cremated and the ashes returned to Liverpool. On his death in hospital, the family made arrangements for him to be cremated. Unfortunately no one remembered or checked about the fact that a heart pacemaker had been inserted many years before, and when questioned by funeral directors, no warnings were given by the family. The pacemaker exploded in the crematorium and the local authority who was responsible for its upkeep claimed compensation from the family or NHS trust. Who, if anyone, is liable?

Cause of Death↗
PubMed2004

Precipitation of nitrate-cancrinite in Hanford Tank Sludge.

The chemistry of underground storage tanks containing high-level waste at the Hanford Site in Washington State is an area of continued research interest. Thermodynamic models have predicted the formation of analcime and clinoptilolite in Hanford tanks, rather than cancrinite; however, these predictions were based on carbonate-cancrinite. We report the first observation of a nitrate-cancrinite [possibly Na8(K,Cs)(AlSiO4)6(NO3)2 x nH2O] extracted from a Hanford tank 241-AP-101 sample that was evaporated to 6, 8, and 10 M NaOH concentrations. The nitrate-cancrinite phase formed spherical aggregates (4 microm in diameter) that consisted of platy hexagonal crystals (approximately 0.2 microm thick). Cesium-137 was concentrated in these aluminosilicate structures. These phases possessed a morphology identical to that of nitrate-cancrinite synthesized using simulant tests of nonradioactive tank waste, supporting the contention that it is possible to develop nonradioactive artificial sludges. This investigation points to the continued importance of understanding the solubility of NO3-cancrinite and related phases. Knowledge of the detailed structure of actual phases in the tank waste helps with thermodynamic modeling of tank conditions and waste processing.

Chemical Precipitation↗
PubMed1996

An approach to dose reconstruction for the Urals population.

Population exposure in the Urals region occurred due to the releases of radionuclides by the Mayak plutonium facility in the 1950's. The major sources of radioactive contamination were the discharges of liquid wastes into the Techa river (1949-1956); an explosion in the storage facility for high level radioactive wastes which formed the East Urals Radioactive Trace in 1957; and gaseous aerosol releases within the first decade of the facility's operation (1949-1957). The problems of dose reconstruction for the population exposed on the Techa river banks and East Urals Radioactive Trace are outlined. The initial data sets and basic models for dose reconstruction are described. The main tasks of the Techa River Dosimetry System Project and the approaches to individual internal and external dose reassessment are formulated.

Humans↗