Matches in SemOpenAlex for { <https://semopenalex.org/work/W156713928> ?p ?o ?g. }
Showing items 1 to 72 of
72
with 100 items per page.
- W156713928 endingPage "73" @default.
- W156713928 startingPage "62" @default.
- W156713928 abstract "The Army Pulse Radiation Facility Reactor has been pulsed to 17 cents above prompt criticality using external reflector control. This is a novel method of fast-pulse reactor operation. The purpose of this work is to provide a high neutron fluence uniform over a 106-mm-diam, 198-mm-high in-core irradiation cavity or “glory hole,” in both pulse and steady-state modes of operation. The 106-mm-diam glory hole is obtained by removing from the standard core a cylindrical center fuel element, the “safety block,” and replacing it functionally by three 50.8-mm-thick, 305-mm-high scramable copper reflectors positioned 5.3 mm from the reactor shroud. The cost of this modification was favorable since fabrication of new fuel pieces was unnecessary. To date this assembly has been successfully pulsed to yields as high as 1.83 × 1017 fission/pulse. There is an ∼38% increase in prompt neutron lifetime in the reflected core due to the central cavity and the reflectors. The prompt negative shutdown coefficient is decreased only slightly so that the reflected core can be pulsed with requisite safety and satisfactory reproducibility. At the routine pulse level of 1.5 × 1017 (±2%) fissions, the pulse width is 66 µsec, the neutron fluence in the glory hole is 5.0 × 1014 n/cm2 (>10 keV), where the peak neutron flux is 6.4 × 1018 n/(cm2 sec) and the gamma-ray dose is 1.6 × 105 R. With a thermal-neutron flux trap, the peak thermal-neutron flux is 1 × 1018 n/(cm2 sec). With a neutron-to-gamma-ray converter, the peak gamma-ray emission rate is 3 × 109 R/sec. Operation at 10 kW in a steady-state mode produces a neutron flux (>10 keV) of 1012 n/(cm2 sec). Experiments have been performed previously to evaluate the use of reflectors as control and pulse rods. The present method of operation extends the use of reflectors to provide the principal mechanical shutdown mechanism in superprompt critical pulse operation." @default.
- W156713928 created "2016-06-24" @default.
- W156713928 creator A5024714909 @default.
- W156713928 date "1976-05-01" @default.
- W156713928 modified "2023-10-16" @default.
- W156713928 title "Fast-Pulse Reactor Operation with Reflector Control and a 106-mm-diam Glory Hole" @default.
- W156713928 doi "https://doi.org/10.13182/nse76-a26858" @default.
- W156713928 hasPublicationYear "1976" @default.
- W156713928 type Work @default.
- W156713928 sameAs 156713928 @default.
- W156713928 citedByCount "2" @default.
- W156713928 crossrefType "journal-article" @default.
- W156713928 hasAuthorship W156713928A5024714909 @default.
- W156713928 hasConcept C111337013 @default.
- W156713928 hasConcept C116915560 @default.
- W156713928 hasConcept C120665830 @default.
- W156713928 hasConcept C121332964 @default.
- W156713928 hasConcept C127413603 @default.
- W156713928 hasConcept C152568617 @default.
- W156713928 hasConcept C181833780 @default.
- W156713928 hasConcept C185544564 @default.
- W156713928 hasConcept C191897082 @default.
- W156713928 hasConcept C192562407 @default.
- W156713928 hasConcept C2164484 @default.
- W156713928 hasConcept C22078206 @default.
- W156713928 hasConcept C27251351 @default.
- W156713928 hasConcept C2778415886 @default.
- W156713928 hasConcept C2780167933 @default.
- W156713928 hasConcept C2982854487 @default.
- W156713928 hasConcept C68709404 @default.
- W156713928 hasConcept C81988546 @default.
- W156713928 hasConcept C94915269 @default.
- W156713928 hasConceptScore W156713928C111337013 @default.
- W156713928 hasConceptScore W156713928C116915560 @default.
- W156713928 hasConceptScore W156713928C120665830 @default.
- W156713928 hasConceptScore W156713928C121332964 @default.
- W156713928 hasConceptScore W156713928C127413603 @default.
- W156713928 hasConceptScore W156713928C152568617 @default.
- W156713928 hasConceptScore W156713928C181833780 @default.
- W156713928 hasConceptScore W156713928C185544564 @default.
- W156713928 hasConceptScore W156713928C191897082 @default.
- W156713928 hasConceptScore W156713928C192562407 @default.
- W156713928 hasConceptScore W156713928C2164484 @default.
- W156713928 hasConceptScore W156713928C22078206 @default.
- W156713928 hasConceptScore W156713928C27251351 @default.
- W156713928 hasConceptScore W156713928C2778415886 @default.
- W156713928 hasConceptScore W156713928C2780167933 @default.
- W156713928 hasConceptScore W156713928C2982854487 @default.
- W156713928 hasConceptScore W156713928C68709404 @default.
- W156713928 hasConceptScore W156713928C81988546 @default.
- W156713928 hasConceptScore W156713928C94915269 @default.
- W156713928 hasIssue "1" @default.
- W156713928 hasLocation W1567139281 @default.
- W156713928 hasOpenAccess W156713928 @default.
- W156713928 hasPrimaryLocation W1567139281 @default.
- W156713928 hasRelatedWork W112421933 @default.
- W156713928 hasRelatedWork W1989041631 @default.
- W156713928 hasRelatedWork W2014324898 @default.
- W156713928 hasRelatedWork W2067849028 @default.
- W156713928 hasRelatedWork W207480445 @default.
- W156713928 hasRelatedWork W2159496220 @default.
- W156713928 hasRelatedWork W2604953809 @default.
- W156713928 hasRelatedWork W3172611397 @default.
- W156713928 hasRelatedWork W3194560447 @default.
- W156713928 hasRelatedWork W793516454 @default.
- W156713928 hasVolume "60" @default.
- W156713928 isParatext "false" @default.
- W156713928 isRetracted "false" @default.
- W156713928 magId "156713928" @default.
- W156713928 workType "article" @default.