Hafnium stainless steel absorber rod for control rod

In a control rod construction for moderating and controlling a reaction of a nuclear reactor, a control rod structure is disclosed in which hafnium (46) is friction-welded to stainless steel (44). Typically, the control rod is confined for movement (52) axially along its length into and out of the r...

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Bibliographische Detailangaben
Hauptverfasser:	DIXON, ROBERT CARL, AIELLO, LOUIS LEONARD, CHARNLEY, JAMES EDWARD, IZZO, KENNETH ROY, CEARLEY, JAMES ELWOOD
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR REACTORS PHYSICS REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Beschreibung
Zusammenfassung:	In a control rod construction for moderating and controlling a reaction of a nuclear reactor, a control rod structure is disclosed in which hafnium (46) is friction-welded to stainless steel (44). Typically, the control rod is confined for movement (52) axially along its length into and out of the reactor. The hafnium is surrounded in the control rod structure by a sheath of stainless steel (40) to inhibit movement relative to the control rod structure other than in the axial direction of control rod movement. The weld is thus stressed only in either tension or compression due to dynamic loading occurring from control rod movement. The stainless steel to which the hafnium is welded is in turn conventionally welded (49) or mechanically connected to the remaining steel components of the control rod. There results a secure control rod structure having welded hafnium that can withstand the dynamic loadings of fast insertion of control rods such as those loadings which commonly occur under rapid control rod acceleration and deceleration due to SCRAM of a reactor.