A SIMPLIFIED FILM DOSIMETER FOR FISSION NEUTRONS

Technical Report · Tue Apr 01 04:00:00 EST 1958

OSTI ID:4346818

Ross, S W; Tochilin, E

A film dosimeter technique was developed for fast neutron monitoring of reactor personnel. The method takes advantage of the rapid build-up of thermal neutrons when fast neutrons are allowed to penetrate a hydrogenous moderator. The badge consists of a 3/4-inch thick polyethylene frontpiece that is worn on the belt against the body. A combination of silver and tin filters are matched so as to produce equal film blackening from either x or gamma rays. Fast neutron exposure is determined from film blackening under radioactive silver produced by capture of the moderated neutrons. The badge contains a sensitive gamma-ray dosimeter film together with a nuclear track emulsion. The dosimeter film serves as both a fast neutron and gammaray dosimeter. The nuclear emulsion is read whenever an overexposure is indicated or under any other conditions where a more accurate evaluation of the fast neutron dose is warranted. (auth)

• Research Organization: Naval Radiological Defense Lab., San Francisco
• NSA Number: NSA-12-009309
• OSTI ID: 4346818
• Report Number(s): USNRDL-TR-224
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
BODY
CAPTURE
DOSEMETERS
ENERGY RANGE
FAST NEUTRONS
FISSION
GAMMA RADIATION
HYDROGEN COMPOUNDS
INSTRUMENTS
MODERATORS
MONITORING
NUCLEAR EMULSIONS
PERSONNEL
PHOTOGRAPHIC FILM
PHYSICS
POLYETHYLENES
RADIATION DOSES
REACTORS
SENSITIVITY
SHIELDING
SILVER
THERMAL NEUTRONS
TIN
X RADIATION