Revision as of 12:47, 4 June 2019 edit 69.88.39.251 (talk) singular/plural match ← Previous edit		Revision as of 08:10, 8 September 2019 edit undo 129.78.56.143 (talk) This photo does not indicate control rod positions but is rather a generic layout of RBMK reactors; all removable (green) control rods were removed during the accident, however this information is irrelevant to the article Next edit →
Line 1: [[File:RBMK Reaktor ChNPP-4.svg\|thumb\|300px\|[[RBMK]] type reactor control rod ~~positions at the moment of the [[Chernobyl disaster]]~~layout; blue='''startup neutron sources''' (12), yellow=shortened control rods from the reactor bottom (32), grey=pressure tubes (1661), green=[[control rod]]s (167), red=automatic control rods (12)]] '''Startup neutron source''' is a [[neutron source]] used for stable and reliable initiation of [[nuclear chain reaction]] in [[nuclear reactor]]s, when they are loaded with fresh [[nuclear fuel]], whose [[neutron flux]] from [[spontaneous fission]] is insufficient for a reliable startup, or after prolonged shutdown periods. Neutron sources ensure a constant minimal population of neutrons in the reactor core, sufficient for a smooth startup. Without them, the reactor could suffer fast power excursions during startup from state with too few self-generated neutrons (new core or after extended shutdown).

Startup neutron source: Difference between revisions