| 摘要 |
An integrated head assembly ( 100 ) is disclosed for a nuclear reactor. The preferred integrated head assembly includes a lift assembly ( 150 ) that supports the reactor vessel closure head ( 90 ) and integrated head assembly for removal, a separate support structure ( 202 ) supported by a ring beam ( 151 ) that sets atop the reactor vessel closure head, a shroud assembly ( 200 ), a seismic support system ( 300 ), a baffle assembly ( 500 ), a missile shield ( 400 ), and a CRDM cooling system. The CRDM cooling system draws cooling air into the baffle assembly, downwardly past the CRDMs ( 96 ), outwardly to upright air ducts ( 600 ), upwardly to an upper plenum ( 680 ), and out of the assembly through the air fans ( 190 ). In a second embodiment the integrated head assembly ( 1100 ) includes a missile shield ( 1400 ) and CRDM cooling system ( 1600 ) that permits access to individual CRDMs from above.
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