Analysis of in-core detector signals from the N reactor at shutdown conditions

Conference · Sun Jan 01 00:00:00 EST 1989 · Transactions of the American Nuclear Society; (USA)

OSTI ID:7028376

Rombough, C T; Toffer, H; Crowe, R D; Samuel, T J

Careful analysis has demonstrated that signals from self-powered fixed in-core detectors can be used to measure the spatial distribution of the gamma flux throughout the N reactor, even in the shutdown state. Except for some obvious flux anomalies (caused by radiation sources such as samarium balls), the spatial distribution is related to the fuel burnup surrounding each detector. These measurements have demonstrated that well-designed self-powered fixed in-core detectors can be used to extract meaningful information at flux levels much lower than previously thought. It is significant that a fixed in-core detector system used in conjunction with commercially available signal collection equipment can accurately measure, with a high degree of confidence, neutron and gamma flux distributions in power reactors at power levels on the order of 0.1%.

• OSTI ID: 7028376
• Report Number(s): CONF-890604-; CODEN: TANSA; TRN: 90-023526
• Journal Information: Transactions of the American Nuclear Society; (USA), Vol. 59; Conference: Annual meeting of the American Nuclear Society, Atlanta, GA (USA), 4-8 Jun 1989; ISSN 0003-018X
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
N-REACTOR
REACTOR MONITORING SYSTEMS
REACTOR SHUTDOWN
SELF-POWERED GAMMA DETECTORS
ACCURACY
SELF-POWERED NEUTRON DETECTORS
DATA ACQUISITION SYSTEMS
GAMMA RADIATION
IN CORE INSTRUMENTS
RHODIUM
SENSITIVITY
SPACE DEPENDENCE
ELECTROMAGNETIC RADIATION
ELEMENTS
ENRICHED URANIUM REACTORS
GRAPHITE MODERATED REACTORS
IONIZING RADIATIONS
LWGR TYPE REACTORS
MEASURING INSTRUMENTS
METALS
NEUTRON DETECTORS
PLATINUM METALS
PLUTONIUM PRODUCTION REACTORS
POWER REACTORS
PRODUCTION REACTORS
RADIATION DETECTORS
RADIATIONS
REACTOR INSTRUMENTATION
REACTORS
SELF-POWERED DETECTORS
SHUTDOWN
TRANSITION ELEMENTS
WATER COOLED REACTORS
220700* - Nuclear Reactor Technology- Plutonium & Isotope Production Reactors