Comparison of Ruska and Rosemont pressure gages

Conference · Tue Dec 31 00:00:00 EST 1991

OSTI ID:10128507

Harvel, C D

A 150,000 gallon tank was calibrated during the months of May and July of 1990. Six calibration runs were completed. Three runs were made by adding measured volumes of water to the tank and three runs were made by removing measured volumes of water from the tank. The calibration fluid was demineralized water. Ruska and Rosemont pressure gages were installed to make in-tank liquid level measurements during the calibration process. A flow meter was used to measure the incremental volumes of water added to or removed from the tank. The Ruska and Rosemont gages were compared to determine the gage best suited for tank operation. One comparison criteria was the tolerance limits of error (LOE) for the predicted standardized in-tank volumes. For accountability purposes, the effects of the two gages on the LOE for the predicted inventory of U-235 were evaluated. This LOE is dependent on several measurement methods. The pressure gage is only one measurement component contributing to this limit. The measurement components must be evaluated collectively to derive each component`s contribution to the inventory LOE. The most important comparison criteria was the gage`s contribution to the U-235 inventory LOE. The choice of which gage to use depends on the other measurement methods used for material accountability. The contributions to the inventory LOE were evaluated for two in-tank liquid level measurement methods, two concentration measurement methods, and one isotopic measurement method. The results indicate the Ruska pressure gage is best suited for tank operation only if the best concentration measurement method is used. When Davies-Grey titration is used for concentration measurements, the Rosemont gage results in a 53% increase in the inventory LOE over the Ruska gage.

• Research Organization: Westinghouse Savannah River Co., Aiken, SC (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC09-89SR18035
• OSTI ID: 10128507
• Report Number(s): WSRC-MS-91-056; CONF-910774-90; ON: DE92008847
• Resource Relation: Conference: 32. Institute of Nuclear Materials Management (INMM) annual meeting,New Orleans, LA (United States),28-31 Jul 1991; Other Information: PBD: [1991]
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
47 OTHER INSTRUMENTATION
SAVANNAH RIVER PLANT
TANKS
CALIBRATION
PRESSURE GAGES
PRESSURE MEASUREMENT
COMPARATIVE EVALUATIONS
LEVELS
VOLUME
INVENTORIES
URANIUM 235
RADIOACTIVE WASTE STORAGE
052002
440800
WASTE DISPOSAL AND STORAGE
MISCELLANEOUS INSTRUMENTATION