| 摘要 |
<p>1,066,010. Controlling reactors. ATOMIC ENERGY OF CANADA Ltd. Dec. 30, 1965 [Feb. 24, 1964], No. 55237/65. Heading G6C. In a nuclear reactor, several separate cores are provided, one of which may be shut down for maintenance purposes. Xenon-135 poison, produced by fission-product tellurium-135 in decaying to iodine-135 which in turn decays to xenon-135, is converted to xenon-136 by neutrons absorbed, from an active core, into the shut-down core. Normally, the xenon-135 poison content in a core continues to rise after shut-down, and rapid restarting is prevented. The present system restricts the growth of the poisoning after shut-down and starting is facilitated. The several cores are mounted close together and enclosed in a single neutron reflector. No shielding exists between the cores so as to permit a free neutron exchange transfer between the cores.</p> |
