"I checked the line as far as it's safe," said Lehman. "No valve."
"O.K.," Cowalczk said. "Listen, Cade, are the injectors still on?"
"Yeah. There's still enough heat in these reactors to do some damage. I'll cut 'em in about fifteen minutes."
"I've found the trouble," Lehman said. "The worm gear's loose on its shaft. It's slipping every time the valve closes. There's not enough power in it to crush the scale."
"Right," Cowalczk said. "Cade, open the valve wide. Lehman, hand me that pipe wrench!"
Cowalczk hit the shaft with the back of the pipe wrench, and it broke at the motor bearing.
Cowalczk and Lehman fitted the pipe wrench to the gear on the valve, and turned it.
"Is the light off?" Cowalczk asked.
"No," Cade answered.
"Water's stopped. Give us some pressure, we'll see if it holds."