[en] SAFETY DESIGN BASIS for the HFBR and Current Status

No abstract available

[en] The U.S. Geological Survey operates four programs to provide external quality-assurance of wet deposition monitoring by the National Atmospheric Deposition Program and the National Trends Network. An intersite-comparison program assesses the precision and bias of onsite determinations of pH and specific conductance made by site operators. A blind-audit program is used to assess the effect of routine sample-handling procedures and transportation on the precision and bias of wet-deposition data. An interlaboratory-comparison program is used to assess analytical results from three or more laboratories, which routinely analyze wet-deposition samples from the major North American networks, to determine if comparability exists between laboratory analytical results and to provide estimates of the analytical precision of each laboratory. A collocated-sampler program is used to estimate the precision of wet/dry precipitation sampling throughout the National Atmospheric Deposition Program and the National Trends Network, to assess the variability of diverse spatial arrays, and to evaluate the impact of violations of specific site criteria. The report documents the procedures and analytical methods used in these four quality-assurance programs

No abstract available

No abstract available

[en] The High-Flux Beam Reactor (HFBR) is a 60-MW(thermal) research reactor designed to produce intense thermal neutron beams. The safety design of the HFBR is based on the automatic shutdown systems, defense-in-depth decay heat removal systems, light water flooding protection, and the reactor confinement system. The reactor power level is presently downrated from 60 to 35.4 MW until thermal-hydraulic tests can be performed to benchmark safety analyses. These analyses should allow Brookhaven National Laboratory to increase reactor power and maintain the criteria of no fuel damage during a design-bases LOCA

[en] In seventy patients with nodular thyroids and a history of radiation exposure, total thyroidectomy disclosed a 54 percent incidence of carcinoma; more than half of them had cervical node metastases; four had distant metastases. Fourteen patients required radical neck dissection. The carcinoma was multicentric (both lobes) in 45 percent. In four patients the carcinoma was found in the lobe contralateral to the one containing the palpable nodule. These findings support the advocates of total thyroidectomy for patients with a nodular thyroid and a history of radiation exposure, provided this operation can be performed with a low incidence of recurrent nerve palsy and hypoparathyroidism

[en] The US Geological Survey operates four programs to provide external quality-assurance of wet deposition monitoring by the National Atmospheric Deposition Program and the National Trends Network. An intersite-comparison program assesses the precision and bias of onsite determinations of pH and specific conductance made by site operators. A blind-audit program is used to assess the effect of routine sample-handling procedures and transportation on the precision and bias of wet-deposition data. An interlaboratory comparison program is used to assess analytical results from three or more laboratories, which routinely analyze wet-deposition samples from the major North American networks, to determine if comparability exists between laboratory analytical results and to provide estimates of the analytical precision of each laboratory. A collocated sampler program is used to estimate the precision of wet/dry precipitation sampling throughout the National Atmospheric deposition Program and the Nation Trends Network to assess the variability of varying spatial arrays and to evaluate the impact of violations of specific site criteria. This report documents the procedures and analytical methods used in these four quality-assurance programs

[en] There have been several similar reports of a high incidence of parathyroid tumours in rats and in man following either exposure of the head and neck to radiation or administration of iodine-131 at a young age. It is suggested that all patients with hyperparathyroidism should be questioned about radiation exposure, and that patient known to have had such therapy in childhood should be tested for asymptomatic hyperparathyroidism. (U.K.)

[en] Twelve patients with coexistent well-differentiated thyroid carcinoma and primary hyperparathyoidism were studied to determine the frequency of previous radiation exposure. Eight were found to have received prior irradiation. External radiation was administered to the head and neck region for benign conditions such as tonsillar enlargement, acne, scrofula, and thyroid enlargement. One patient received 131I therapy for carcinoma of the thyroid. The observation that 67% of the patients in this series had previous radiation to the head and neck strongly implicates radiation exposure in the development of coexistent well-differentiated thyroid carcinoma and hyperparathyroidism