... reactivity by positioning neutron absorbing control rods within the reactor core in response to manual control signals. ... (GE) letter, identified loose or missing bolts at the top and base of the HCU frames which affected the support of 31 out of 145 HCUs. Also, the installation drawing specified that base bolts were to be installed with both flat washers and lock washers. ... This letter informed BWR owners that missing or loose hold-down bolts on the HCU frames had been identified at aanbsp;...
|Title||:||Power Reactor Events|