Development of an extended range start-up monitor (ERSM) for boiling water reactions

Conference · Wed Feb 01 04:00:00 EST 1984 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:6837241

Glesius, F L; Hammer, M F; Kroon, J C; Myrabo, A L

The existing in-core instrumentation in a BWR currently performs important reactor safety functions. To avoid interfering with these functions, a new fixed Wide Range Flux Monitor (WRFM) has been designed to cover the range of 10/sup -6/% to 100% full power with a single assembly. Each WRFM is designed with four fission detectors axially spaced along the fuel in an assembly dimensionally identical to an LPRM assembly. The four fission detectors within each WRFM are of two types. Two detectors separated axially above the core midplane are fission counters with regenerative (U 234/U 235) coatings for long life. Two power range fission chambers are positioned below core midplane. They are also provided with a regenerative coating and are identical to those used in an LPRM. Overlap between the source/intermediate range detectors and the power range detectors is achieved; the technical challenge lies in their miniaturization. Presently, prototypic detectors are undergoing reactor testing, and two assemblies will be installed in a power reactor in early 1984.

• Research Organization: Reuter-Stokes, Inc., 18530 S. Miles Parkway, Cleveland, Ohio 44128
• OSTI ID: 6837241
• Report Number(s): CONF-831015-
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: 31:1
• Country of Publication: United States
• Language: English

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