Operational monitoring at the Princeton--Pennsylvania Accelerator
- ed.
From third Health Physics Society midyear topical symposium; Los Angeles, California, USA (29 Jan 1969). See CONF-690103P1. The results of surveys for the main radiation areas are presented. Dose rates in the external beam hall have been 1 to 3 mrem/hr, almost entirely due to neutrons. The top of the external beam shielding has constituted a virtual radiation source. This made additional shielding necessary to protect a lunch room adjacent to the building. Remanent radioactivity results are presented. Finally, a device for estsblishing occupancy times automatically is described. The results of area surveillance are used to establish personnel doses wherever possible. A formula to establish occupancy times in mixed radiation fields is discussed. Pocket dosimeters are shown to be more convenient and economiesl than thermoluminescent dosimeters for day-to-day monitoring. The only significant transferrable activity found was due to a molybdenum-sesquisulfide-based lubricant. An extrapolation chamber has been used for surfuce dose measurements and results are presented. A network of fixed and mobile Bonner spheres is used for neutron dosimetry. Record keeping, use and maintenance for these is described. Deterioration of Lil(Eu) scintilators has been observed. The correlation of neutron film badge and Bonner sphere is described in different locations. The use of multisphere techniques in film badge calibration and fading compensation is presented. Tissue-equivalent ionization chambers are used for mixed field dosimetry. The eight inch chamber has been adapted to a cutie pie'' body to give an extremely useful portable instrument. /sup 6/LiF and /sup 7/LiF TLD pairs in the center of moderators have been exposed to several gamma sources and a PuBe source, all of known intensity. Results of this calibration are discussed and conversion factors presented. (auth)
- Research Organization:
- Princeton Univ., NJ
- NSA Number:
- NSA-29-030227
- OSTI ID:
- 4329693
- Resource Relation:
- Conference: 3. Health Physics Society midyear topical symposium, Los Angeles, California, USA, 29 Jan 1969; Other Information: See CONF-690103--P1. Orig. Receipt Date: 30-JUN-74; Related Information: Health physics operational monitoring. Vol. 1.
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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