THE PLUTONIUM RECYCLE TEST REACTOR SHIELDING EVALUATION

Technical Report · Mon Jan 01 04:00:00 EST 1962

OSTI ID:4775007

Williams, L D

The x-ray film studies of the top and bottom primary shields displayed definlte gamma radiation streaming from around the shim control shroud tubes, monitor tubes, and other access holes, but showed effective shielding above and below the process tubes and primary shields. The biological shielding displayed no leaks or weak spots except for areas around all the flux monitor channels and an access hole near the ceiling in -32' C Cell. The bulk of the data indicated a linear increase in dose rate as a function of reactor power level. General gamma dose rates throughout A Cell were 1 to 3 r/hr at 70 Mw, while the general background in B and C Cells varied from 0.7 to 8 mr/ hr. Fast neutron dose rates in A Cell reached 220 mrem/hr at 10 Mw. B and C Cell neutron dose rates with the reactor at 70 Mw were less than 1 mrem/hr. The average ratio of fast neutron dose rate to gamma dose rate through the rotating shields remained constant at 4 : 1 as the fast neutron dose rate increased from background at 1 Mw to 30 mrem/hr at 70 Mw. Tabular and graphic data summarizing the results are presented. Illustrations showing the penetrations in the biological shielding are included. The film holders used during the filming of the top primary shield are illustrated. (auth)

• Research Organization: General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
• DOE Contract Number: AT(45-1)-1350
• NSA Number: NSA-17-001120
• OSTI ID: 4775007
• Report Number(s): HW-72263(Rev.)
• Country of Publication: United States
• Language: English

Related Subjects

BACKGROUND
CONTROL ELEMENTS
DIAGRAMS
FAST NEUTRONS
GAMMA RADIATION
IN PILE LOOPS
PHOTOGRAPHIC FILM DETECTORS
POWER
PRTR
RADIATION DOSES
RADIATION PROTECTION
REACTOR TECHNOLOGY
REACTORS
SHIELDING
TABLES
TUBES
X RADIATION